Bell Laboratories Record

Note: This is a work in progress, some issues are missing pages.

Special Thanks to and an anonymous donor.

Section Date Issue Size Title
Vol. 1, No. 11925-09-012.20 MB▪ The Model Shop
▪ The Semi-Remote Control Power Board
▪ Mathematical Research
Vol. 1, No. 21925-10-011.46 MB▪ Electrical Stethoscope
▪ The Spinal Cord of a Nation
▪ Analysing the Motion of Mechanical Devices
▪ The Artificial Line
▪ Who Pays Our Salaries?
▪ Modern Economies Replace Historic Power Plant
▪ When the Alarm Rings
▪ Storage "B" Battery Truck
Vol. 1, No. 31925-11-011.46 MB▪ Our New Building
▪ History of the Telephone Pioneers of America
▪ Sound Recording and Reproducing
▪ Six Thousand Lettres a Day
▪ Keeping Time at West Street
▪ The New York-Azores Cable
▪ Telephone Dictation
Vol. 1, No. 41925-12-011.63 MB▪ Our Historical Museum
▪ Multiplex Transmission by Carrier Currents
▪ Carrier-Current Telephone Systems
▪ For Better Radio Reception (548 Type Loud Speaker)
▪ Pressure Testing of Submarine Cables
▪ A Library of Heart Throbs
Vol. 1, No. 51926-01-011.26 MB▪ Carrier-Current Telegraphy
▪ Electro-Mechanical Sound Recording
▪ Mechanical Developments at Hawthorne
▪ Early Developments in Telephone Signalling
Vol. 1, No. 61926-02-012.14 MB▪ Transmission Limits of Telephone Lines
▪ Installing Radio Broadcast Equipment
▪ The First Woman Telephone Operator
▪ The Microscope as an Industrial Tool
▪ Telephone Signalling
▪ Water Cooling in Radio Broadcasting
▪ Stranded Conductor for High Frequency
▪ Apparatus Which Makes Air a Liquid
▪ Assembly Methods for Loading Coil Cases
Vol. 2, No. 11926-03-011.38 MB▪ Clear as Crystal
▪ Developments and Savings in Contact Materials
▪ The General Staff Department
▪ Why the Time-Clock Knobs Are Black
Vol. 2, No. 21926-04-011.80 MB▪ The Aurora
▪ Two-Way Transatlantic Radio Telephony
▪ Textiles for Insulation in Telephone Equipment
▪ Some Uses of the Cathod-Ray Oscillograph
▪ A One-Kilowatt Radio Transmitter for Broadcasting
▪ Development of Communication Systems
▪ The Systems Development Department
▪ How the Laboratories are Heated
▪ The Telephone and the Switching Locomotive
Vol. 2, No. 31926-05-011.99 MB▪ Power Equipment for Safeguarding Telephone Service
▪ Auditory Masking
▪ A Universal Laboratory Transmission-Measuring Set
▪ New Telegraph Equipment
▪ Lubrication and Wear
▪ The Development of Apparatus
▪ Printing Telegraph Connections With Hawthorne
▪ Cable Development Outpost at Hawthorne
Vol. 2, No. 41926-06-011.92 MB▪ The Manufacture of Vacuum Tubes
▪ Selecting an Audio-Frequency Amplifier
▪ The 6025-B Amplifier
▪ Methods of Measuring Children's Hearing
▪ Remote Control of Power Station
▪ New Portable Sets Measure Radio Transmission
Vol. 2, No. 51926-07-011.55 MB▪ Photoelectric Cells
▪ Making the Best Use of Experience
▪ New Cords and Cord Tips
▪ The Vitaphone
▪ An Audible Motion Picture
▪ Transforming Our Power Supply
▪ A Simplified Announcing System
▪ Speech Sounds
Vol. 2, No. 61926-08-011.56 MB▪ Cosmic Rays
▪ Planning a Radio-Telephone System
▪ In Tune or Out of Tune
▪ New Amplifier for Public Address Systems
▪ The First Underground Telephone
Vol. 3, No. 11926-09-011.34 MB▪ Four Years' Progress in Radio Broadcasting
▪ Telegraphy by Typewriter
▪ Odd Tools for Machine-Switching Apparatus
▪ Concealing the Wires
▪ The Ionization Manometer
Vol. 3, No. 21926-10-011.38 MB▪ The Evolution of the Input Transformer
▪ The Silent Drama of Telephony
▪ Our New Radio Laboratory at Whippany
▪ Public-Address Systems
Vol. 3, No. 31926-11-011.21 MB▪ Reducing the Cost of Electrons
▪ Mechanical Distribution of Toll Tickets
▪ A Mechanical Brain
▪ Saving by Swaging
▪ How the P.B.X. Gets Its Power
▪ A Modern Inquisition
▪ The Transmitter Life-Test
Vol. 3, No. 41926-12-011.64 MB▪ A Physical Background for Permalloy
▪ Dispatching Trains by Telephone
▪ When the Radio Squeals
▪ A Piano String Model of the Human Ear
▪ After Office Hours
▪ The Vitaphone Tells Tales of Itself
Vol. 3, No. 51927-01-011.18 MB▪ From Conference to Cable
▪ Accelerated Laboratory Tests
▪ Closing the Books
▪ Gauges for Machine-Switching Equipment
▪ Magnetic Materials
▪ Stroboscopic Analysis
Vol. 3, No. 61927-02-011.54 MB▪ Thermal Agitation of Electricity
▪ The Loudness of Pure Tones
▪ Power Supply for Radio Receivers
▪ Lead Cable Sheath
▪ Measuring to Four Parst in a Billion
▪ Phonograph Records Illustrating Distortion
Vol. 4, No. 11927-03-011.33 MB▪ The String Oscillograph in War and Peace
▪ A New Amplifier for Train Dispatching
▪ A Rectifier for Train Dispatching
▪ The Printed Form
▪ Electro-Mechanical Oscillators
▪ The Printed Form
▪ Electromechanical Oscillators
Vol. 4, No. 21927-04-011.36 MB▪ Are Electrons Waves?
▪ Marking the Overload Point
▪ Mechanical Filters
▪ An Announcing System for Battleships
▪ Cable Corrosion
▪ The Electrolytic Condenser
▪ Frequency Measurements with the Cathode Ray Oscillograph
▪ Measuring the Resistance of Sliding Contacts
Vol. 4, No. 31927-05-011.96 MB▪ The First Demonstration of Television
▪ Television by Radio
▪ Physical Principles and Apparatus
▪ Research and Development Leading to Television
▪ Television -- A Group Achievement
Vol. 4, No. 41927-06-011.76 MB▪ A New Type of Toll Switchboard
▪ Iron Crystals
▪ Long Waves or Short
▪ Light Finish in Central Offices
▪ Development of Light-Colored Finishes
▪ Eavesdropping on Bank Robbers
▪ Novel Devices for Lubrication
▪ Research Design
Vol. 4, No. 51927-07-011.16 MB▪ Insulation for Submarine Cables
▪ The Television Timer
▪ Wax Lubricants
▪ Quality Rating of Telephone Products
▪ Drafting of Telephone Systems
▪ A Direct-Reading Inductance Standard
▪ Flood-Time Telephone Service
▪ Cooling Our Drinking Water
Vol. 4, No. 61927-08-011.31 MB▪ The Hardening of Lead
▪ Measuring Dial Speeds
▪ Eleven Miles of Wire
Vol. 5, No. 11927-09-011.59 MB▪ A New Era in Loading
▪ New Step-by-Step Equipment
▪ The Life History of an Adsorbed Atom
▪ A Tour Through the Microscopic Laboratory
▪ Cutting Expense Corners in Systems Drafting
Vol. 5, No. 21927-10-011.70 MB▪ Hearing Aids and Deafness
▪ The Polarity of Learning
▪ A Compact Direct-Current Amplifier
▪ A Practical Short-Wave Oscillator
▪ Sheet Insulating Materials
Vol. 5, No. 31927-11-013.08 MB▪ Power Rating of Broadcasting Transmitters
▪ The Fifty-Kilowatt Radio Transmitter
▪ Working the Base Metals
▪ Echo Elimination in Transatlantic Service
▪ Polishing the Contacts of Telephone Plugs
▪ Saving the Tracing in the Systems Drafting Group
▪ Telephone Service Opened with Mexico
Vol. 5, No. 41927-12-011.49 MB▪ A Statement of Policy
▪ Fifty Years of Telephone Plugs
▪ Humidity Test Equipment
▪ Commercial Generator for Central Office Power Plants
▪ Cable Splicers' Test Set
▪ Strength-Tests of Telephone Materials
Vol. 5, No. 51928-01-011.42 MB▪ Twenty Years at West Street
▪ The Dufour Cathode-Ray Oscillograph
▪ A Brake for Rolling Ladders
▪ New Rubber Compression Testing Machine
▪ Saving Days and Dollars With Shears
▪ The 5-A Audiometer
▪ High Voltage Storage Battery
Vol. 5, No. 61928-02-011016.23 KB▪ Ionized Regions in the Atmosphere
▪ New Specifications for Raw Materials
▪ The Use of Codes in Electrical Communication
▪ Psychology Aids in Tests of Hearing
▪ New Languages from Old
▪ "What Are the Chances That…"
▪ Tooling-Up the Drafting Room
▪ The Twenty-Four Inch Cone
Vol. 6, No. 11928-03-013.06 MB▪ A New Loud-Speaking Receiver
▪ Step-by-Step Cordless "B" Board
▪ New Devices in Television
▪ Radio Installations in South America
▪ Water Cooling for Radio
Vol. 6, No. 21928-04-011.41 MB▪ "Signal Shaping" for Submarine Cables
▪ Platinum Alloys for Vacuum Tube Filaments
▪ Our Insurance Plan
▪ Carrier Telegraph in Canada
▪ The Local Circuit Development Laboratory
▪ Permalloy in Audio Transformers
Vol. 6, No. 31928-05-011.77 MB▪ The Decoder
▪ Differential Equations and Law
▪ Telephone Service Opened with Paris
▪ Phonograph Records of Heart Sounds
▪ Amplification Behind the Talking Movies
▪ Spectrographic Analysis
▪ The Laboratories Take to the Air
▪ Rotary File Type Information Desk
▪ Life Insurance Protection
Vol. 6, No. 41928-06-011.10 MB▪ Systematized Research
▪ New Standards in Emergency Power-Supply Units
▪ Sound-proof Rooms
▪ The Light of a Television Eye
▪ Amplifier for Condenser Transmitter
▪ Terminal Strips
▪ "To Have and To Hold"
Vol. 6, No. 51928-07-011.23 MB▪ Research Methods
▪ A Short-Haul Carrier System
▪ Determining Short-Wave Paths
▪ A New Non-Multiple P.B.X.
▪ Some Early Cable Terminals
▪ Very Thin Films of Rubidium
Vol. 6, No. 61928-08-011.44 MB▪ Some Facts about Frequency Measurement
▪ Continuous Charging for Automatic Branch Exchanges
▪ Acoustic Filters
▪ Apparatus Analysis
▪ Announcing the 740-A P.B.X.
▪ A New Method in Television
▪ The Opening of Transatlantic Service on Short Waves
▪ Taking the Harm Out of Harmonics
▪ An Efficient Driving Coil for Loud Speakers
Vol. 7, No. 11928-09-011.11 MB▪ The Perminvars, a Group of New Magnetic Alloys
▪ Hunting Features in the Panel System
▪ Cable Terminals
▪ The Grid-Current Modulator
▪ Insuring Central-Office Power Supply
▪ Frequency Control for Broadcasting
▪ The Rest Room in New Dress
Vol. 7, No. 21928-10-011.54 MB▪ Airways Communication Service
▪ The Nobel Laureates
▪ Human Errors and the Dial Telephone
▪ Critical Relays of the Telephone System
▪ Lever Type Keys
Vol. 7, No. 31928-11-012.18 MB▪ Reproducing Sound and Scene
▪ Fundamentals of Speech, Hearing and Music
▪ General Principles of Sound Recording
▪ Recent Advances in Wax Recording
▪ Sound Recording with the Light Valve
▪ Speed Control for the Sound-Picture System
▪ Sound Projector Systems for Motion-Picture Theaters
▪ Installation and Adjustment of Western Electric Sound-Projector Systems
Vol. 7, No. 41928-12-012.49 MB▪ "TU" Becomes "Decibel"
▪ Composite Telegraphy
▪ Panel Senders
▪ The Mechanical Delay-Network
▪ Development of the Impedance Bridge
▪ Coil Corrosion
▪ Trunk Hunting Switches
▪ Locating Faults on Toll Lines
Vol. 7, No. 51929-01-011.30 MB▪ Particles and Waves
▪ Transmission Regulating System for Toll Cables
▪ Corrosion of Lead Cable Sheath
▪ High-Strength Aluminum Alloys for Diaphragms
▪ Couteracting Dialing Errors in the Step-by-Step System
▪ Operators' Transmitters and Receivers
Vol. 7, No. 61929-02-012.01 MB▪ An Introduction to "Speech and Hearing"
▪ Development of the 1800-Pair Cable
▪ Private Branch Exchanges
▪ Atomic Physics and Circuit Theory
▪ Development of Step-by-Step Line Finders
▪ New Equipment for Voice-Frequency Telegraphy
▪ Ringing Machines for Small Offices
Vol. 7, No. 71929-03-011.60 MB▪ Leadership in Industrial Research
▪ Curious Patents in Mechanical Switching
▪ A New Telephone Door for the Retail Shop
▪ Saving Lead in Toll Offices
▪ Direct Scanning in Television
▪ Transmission Testing of Central-Office Circuits
▪ Small Power Plants for Telephone Repeaters
▪ Level Hunting Connectors
Vol. 7, No. 81929-04-011.22 MB▪ Textiles as Insulators
▪ Washed Textile Insulation for Central-Office Wiring
▪ Laying a Foundation for Aircraft Communication
▪ A New Radio Receiver for Commercial Airplanes
▪ Straightforward Trunking
▪ The Electromagnetic Oscillograph in the Circuit Laboratory
▪ A New Cordless Switchboard
Vol. 7, No. 91929-05-011.70 MB▪ What's a Good Loud Speaker?
▪ Extending the Usefulness of the Oscillograph in Circuit Testing
▪ Patents as a Means of Both Protection and Publication
▪ The Pulse Corrector
▪ Routine Tests in a Panel Office
▪ Graphical Symbols for Telephone and Telegraph Use
▪ Trouble Indicator
Vol. 7, No. 101929-06-011.46 MB▪ Picture Transmission in England
▪ Toll-Line Signalling
▪ Panel Fundamental Circuit
▪ All-Relay Register Circuit
▪ A Slide Rule for Vector Calculations
▪ Condensers for Many Uses
Vol. 7, No. 111929-07-011.79 MB▪ New Short-Wave Radio Stations
▪ Television in Colors
▪ Rotating the "Wax" for Sound Pictures
▪ A Carrier Telephone System for Power Lines
▪ Capability Engineering of Step-by-Step Relays
Vol. 7, No. 121929-08-012.51 MB▪ The Story of Short-Wave Transoceanic Telephony
▪ Transmitting Station at Lawrenceville, N.J.
▪ The Transatlantic Short-Wave Transmitters
▪ Short-Wave Transmitting Antennas
▪ The Transatlantic Short-Wave Receivers
▪ Short-Wave Receiving Antennas
Vol. 8, No. 11929-09-012.15 MB▪ Transatlantic Telephone Cable
▪ The Master Reference System for Telephone Transmission
▪ Voice-Frequency Equipment for the Transatlantic Radio Telephone
▪ Power Supply for Voice-Frequency Equipment, Transatlantic Short-Wave Radio
▪ The Commercial Problems in Engineering the Transoceanic Short-Wave Radio System
▪ Reproducing Machien for Picture and Sound
▪ Tie Lines Between Private Branch Exchanges
▪ A New Dial PBX of Large Capacity
Vol. 8, No. 21929-10-011.24 MB▪ High-Frequency Quartz-Crystal Oscillators
▪ Short-Wave Vacuum Tubes for Transoceanic Service
▪ Restoring Speech
▪ Bearings in Power-Driven Telephone Apparatus
▪ Methods of Handling Toll Calls
▪ Season-Cracking of Metals
Vol. 8, No. 31929-11-012.00 MB▪ Viscosity in Solids
▪ Permeameters for Measurements over Wide Temperature Ranges
▪ A New Multiple P.B.X.
▪ A Thousand-Ampere Choke Coil
▪ Calling Subscribers to the Telephone
▪ Standard Housings for Portable Test Sets
▪ Adjustment Provisions for Central Office Apparatus
Vol. 8, No. 41929-12-011.96 MB▪ Taking Chances in Inspection-by-Sampling
▪ A New Emergency Power Supply Unit
▪ Lacquering and Plating in the Laboratories
▪ Impedance Bridges
▪ Evolution of the Call-Indicator System
▪ An Outline of Step-by-Step Organization
▪ A Method for Estimating Audible Frequencies
Vol. 8, No. 51930-01-012.63 MB▪ Telephony Between Ship and Shore
▪ The Call Announcer
▪ Systems Drafting Moves
▪ Outside Plant Development New Quarters
▪ A Low-Insulation Alarm for Toll Cables
▪ Notes on Panel Development
▪ The Manual Tandem Board
Vol. 8, No. 61930-02-012.68 MB▪ New Sound-Picture Laboratory
▪ Testing Ringers and Dials at Subscribers' Stations
▪ Idle Trunk and Position Indicating
▪ The Telephone in its Infancy
▪ Economics of Relay Winding Design
▪ A New Dial PBX for Residences
▪ The New Chicago Toll Office
Vol. 8, No. 71930-03-011.99 MB▪ The Prior Art
▪ Prevention of Crosstalk in Phantom Loading Units
▪ Function of the Toll Circuit Laboratory
▪ Telephone Line Insulators
▪ Excellence in Auditoriums
▪ Improved Equipment for Information Service
▪ A New Timing Disc for the Oscillograph
▪ Bell System Contributors to the Encyclopaedia
Vol. 8, No. 81930-04-012.50 MB▪ A Year of Progress in Telephony
▪ Discontinuities in Magnetization
▪ Recording the Sound Picture
▪ Sound-Picture Slang
▪ A New Electrolysis Switch
▪ Clutches for the Panel System
▪ A Thousand-Cycle Frequency Standard
▪ New Equipment for Central Office Supervision
▪ Synthetic Photography
Vol. 8, No. 91930-05-013.31 MB▪ Two-Way Television
▪ Radio Engineering in Buenos Aires
▪ Subscriber's Line Finder and District Selector
▪ A Dial PBX for Large Residences
▪ The New Telephone Booth
▪ Shipping and Transportation
▪ A New Main Distributing Frame for Large Offices
Vol. 8, No. 101930-06-012.04 MB▪ Dials for the Flying Fleet
▪ A Cathode Ray Hysteresigraph
▪ Steel-Tape-Armored Toll Cable
▪ Die Castings
▪ Toll Tandem Switchboard
▪ Reduction of Noise in Cables by Electrolytic Condensers
▪ Short Cuts in Drafting
Vol. 8, No. 111930-07-012.48 MB▪ Improvements in Radio Broadcasting Transmitting
▪ Key-Display Type Call Indicators
▪ Automatic Prevention of Trouble by Decoders
▪ Flutter Effect in Loading Coils
▪ Multiplying the Subscriber's Line
▪ Acoustical Characteristics of Movie Screens
▪ Apparatus for Step-by-Step Routine Tests
Vol. 8, No. 121930-08-012.55 MB▪ Microphonic Action in Telephone Transmitters
▪ A Regenerative Telegraph Repeater
▪ The Ultra-Violet Microscope
▪ A Rapid Record Oscillograph
▪ Springs for Telephone Apparatus
▪ Central-Office Lighting
▪ The Holding Time Recorder
▪ The Campaign Against Noise
Vol. 9, No. 11930-09-012.53 MB▪ The Dean of Telephone Engineers
▪ Carty—The Engineer and The Man
▪ John J. Carty—a Biographical Note
▪ Radio Transmission to South America
▪ Measuring Flutter in Loading Coils
▪ Age Hardening Lead-Calcium Alloys
Vol. 9, No. 21930-10-012.68 MB▪ The Role of Barium in Vacuum Tubes
▪ Radio-Telephone Equipment for Airplanes
▪ New Radio Transmitters for Airway Applications
▪ Aircraft Radio Receivers
▪ Test Truck for Aircraft Radio
▪ Glow Discharge Lamps for Television System
▪ A Standard Test Set for Vacuum Tubes
▪ New Insulation Now in Production
Vol. 9, No. 31930-11-012.80 MB▪ Effect of Magnetic Interference on Relay Operation
▪ Automatic Display Call Indicator System
▪ A New Analyser of Speech and Music
▪ Reducing Wear at Base-Metal Contacts
▪ Panel Selectors
▪ Key Pulsing for No. 3 Toll Boards
▪ Function of Repeating Coils in Carrier Circuits
Vol. 9, No. 41930-12-012.38 MB▪ A New "B" Board for Panel Offices
▪ A Magnetization-Curve Tracer
▪ Cross-Fire Neutralization of Telegraph Circuits
▪ Finishes on the Metal Parts of Telephone Apparatus
▪ Power for Magneto Offices
▪ Common Frequency Broadcasting Development
▪ Ringing Conditions on PBX Trunks and Tie Lines
Vol. 9, No. 51931-01-012.23 MB▪ Telephone-Typewriter PBX Systems
▪ Selector-Connectors for PBX Service
▪ Economics of the Application of Relays to Telephone Circuits
▪ Electrical Delay Circuits for Radio Telephony
▪ Circuit Equipment for Program Transmission
▪ Step-by-Step Pulse Repeater
▪ A Shallow Horn for Theatre Use
Vol. 9, No. 61931-02-012.60 MB▪ Progress in Two-Way Television
▪ Early Manual Switchboard Development
▪ Telegraph Ground-Potential Compensator
▪ Testing Earth Anchors
▪ Telephone Jacks
▪ Telephone Order Wires for Toll Circuit Maintenance
▪ Maintenance of Tripping Relays
Vol. 9, No. 71931-03-012.35 MB▪ New Types of Photoelectric Cells
▪ Measuring Reverberation
▪ Life Testing of Vacuum Tubes
▪ A Small Call Indicator
▪ Damping Methods for Electrical Reproducers
▪ Theatre System for the Hard of Hearing
▪ Correct Time by Telephone
Vol. 9, No. 81931-04-012.65 MB▪ Sir Chandrasekhara Venkata Raman, Nobel Laureate
▪ Quality of Television Images
▪ A Trial of the Radiotelephone in Alaska
▪ Lamp Sockets
▪ More Phonograph Records Illustrating Distortion
▪ New Sound Reproducing Equipment for Theatres
▪ Washouts
▪ Saying it With Tones
Vol. 9, No. 91931-05-013.03 MB▪ An Address: Walter S. Gifford
▪ Key West-Havana Cable No. 4
▪ Carrier Equipment for Key West-Havana Cable
▪ Paragutta
▪ A Wear Test for Finishes
▪ Acoustic Delay Circuits
▪ A Loud Speaker Good to Twelve Thousand Cycles
▪ A New Type of Laboratory Bench
Vol. 9, No. 101931-06-016.04 MB▪ Dielectric Properties of Matter
▪ A-C Busy Lamps for Toll Boards
▪ Molded Insulating Materials
▪ New Laboratories for Telegraph and Carrier Telephone Development
▪ Inductive Coordination Laboratory
▪ What the Sender Test Circuit Does
▪ A Universal Turret for Desk Mounting
Vol. 9, No. 111931-07-012.55 MB▪ Radio's Past and Future
▪ The High Vacuum Tube Comes Before the Supreme Court
▪ Welded Steel Cases for Loading Coils
▪ The Panel System
▪ Field Laboratory for Outside-Plant Studies
▪ Dielectric Properties and Chemical Constitution
Vol. 9, No. 121931-08-012.71 MB▪ Dial Offices for Small Communities
▪ Recording Contour Gauge
▪ A Linear Time Axis for a Cathode-Ray Oscillograph
▪ "—And the Operator Will Answer"
▪ Repeaters for Two-Wire Toll Circuits
▪ Measuring the Frequencies of Radio Signals
▪ Automatic Testing Equipment for Trunk Circuits
Vol. 10, No. 11931-09-013.95 MB▪ New Permalloys
▪ Four-Wire Telephone Circuits
▪ Non-Ferrous Alloys
▪ Profile Lathe for Miniature Work
▪ A Fruitful Application of Mathematics
▪ Radiator Cooling Units for Reserve Power Plants
▪ Highway Wiring Diagrams
Vol. 10, No. 21931-10-012.63 MB▪ Measuring One Trillionth of an Atmosphere
▪ The Single-Line Telegraph Repeater
▪ A Small Subscriber Set
▪ Telephone Apparatus for the Hard of Hearing
▪ Portable Speech-Input Equipment
▪ The Panel Bank
▪ Police of New York State Adopt the Teletypewriter
Vol. 10, No. 31931-11-011.74 MB▪ New Overseas Radio-Telephone Extensions
▪ A Versatile Nomogram for Circuit Problems
▪ Rolling Joints
▪ Interference Effects with Shared-Frequency Broadcasting
▪ Service Insurance for Toll Cord Circuits
▪ Shielding for Electric Circuits
▪ Squares and Rectangles
▪ The Golden Section
Vol. 10, No. 41931-12-011.71 MB▪ An Introduction to the Panel System
▪ A New Oscillator for Broadcast Frequencies
▪ Addressing Atlantic City Conventions
▪ The Sequence Switch
▪ Reduction of Radio Interference from Telephone Power Plants
▪ A 24,000 Watt Filter
▪ The Toll Train
Vol. 10, No. 51932-01-012.37 MB▪ The Time Factor in Telephone Transmission
▪ Nation-Wide Teletypewriter Service
▪ Coal for Transmitters
▪ An Adjustable Frequency Generator for the Voice Range
▪ Hydrogenized Iron of High Permeability
▪ Mortar Bandage Conduit Joints
▪ The Lapel Microphone
▪ Portable Balance Unit for A-C Precision Bridge
Vol. 10, No. 61932-02-012.47 MB▪ An Improved Transmitter for Operators' Use
▪ Distributing Programs in the Waldorf Astoria
▪ Quartz Crystal Resonators
▪ Coal Talks
▪ A Transmitter for the Coast Guard
▪ A New Retardation Coil for Composite Sets
▪ Power Driven Maintenance Tools
▪ Busy Indicators in the Manual System
Vol. 10, No. 71932-03-011.97 MB▪ Corrosion of Iron
▪ Printing the Test-Board Instructions
▪ Mechanically Locking Keys
▪ Switchboard Lamps
▪ Measuring the Illumination From Switchboard Lamps
▪ A Re-recording Machine for Sound Films
▪ Laboratory for Precision Linear Measurements
▪ Testing for Magnetic Characteristics
Vol. 10, No. 81932-04-012.23 MB▪ Pulp—The New Cable Insulation
▪ Smaller and Better Condensers
▪ The Mendham Laboratory
▪ A Push-Button Key for Train Dispatching
▪ Improved Continuity Test for Enamel Insulation on Wires
▪ The Horizontal Diamond-Shaped Antenna
▪ Transmission Networks and Their Measurement
Vol. 10, No. 91932-05-014.73 MB▪ Laboratory for Welding Studies
▪ Do Our Ears Grow Old?
▪ A Sensitive Moving-Coil Microphone of High Quality
▪ Adapting the Moving-Coil Microphone to Commercial Use
▪ Mountings, Connectors, and Amplifier for Moving-Coil Microphone
▪ The Service of Analytical Chemistry to Research
▪ A Portable Sound Meter
Vol. 10, No. 101932-06-011.79 MB▪ What is a Satisfactory Hearing Aid?
▪ Transmission Instruments for the New Audiophone
▪ Pacific Gas and Electric Extends Its Carrier System
▪ Transformer Equipment for Large Experimental Radio-Telephone Transmitter
▪ Audiphones
▪ Motion Pictures in Relief
▪ Acoustical Society Hears New Vertical Recordings
Vol. 10, No. 111932-07-011.56 MB▪ Electrical Reflections and Their Measurement
▪ A Low-Frequency Oscillator
▪ Summer Ailments and Their Treatment
▪ Portable Maintenance Tools for Commutators of Generators
▪ The Station Ringer
▪ A New System of Sound Recording
▪ A Measure of Physical Quality for Central Office Equipment
▪ Western Electric Photomatic Equipment
Vol. 10, No. 121932-08-011.83 MB▪ Boundary Lubrication
▪ A Permanent-Magnet Light Valve
▪ Portable Sound-Picture System for Sixteen Millimeter Film
▪ Wires for Subscribers' Premises
▪ Dial Services for Small Communities
▪ A New Switching Unit for Program Circuits
Vol. 11, No. 11932-09-012.15 MB▪ Order Turret No. 3
▪ A Tone Alternator
▪ Proving Grounds for Telephone Poles
▪ A Splash-Proof Dial for the Navy
▪ Airport Radio Transmitter
▪ A Radio Transmitter for the Itinerant Flyer
Vol. 11, No. 21932-10-013.82 MB▪ Radiation-Cooled Power Tubes for Radio Transmitters
▪ A Low-Power Broadcast Transmitter
▪ Solder and the Art of Wiping Cable Splices
▪ Testing the Elasticity of Vacuum Tube Filaments
▪ A Crosstalk Measuring Set of Improved Precision
Vol. 11, No. 31932-11-012.28 MB▪ A Telephone System for Harbor Craft
▪ Forecasting the Behavior of Wood Preservatives
▪ Commercial Construction Adopted for Ringing-and-Coin-Control Generators
▪ Fishing Industry Adopts Marine Telephony
▪ The Development of the Protector Block
▪ Cellulose Acetate Treatment of Textile Insulation
Vol. 11, No. 41932-12-012.20 MB▪ A New Common-Battery Board for Small Offices
▪ Generating High Frequencies with Precision
▪ A Precise Radio-Frequency Generator
▪ A Skin-Effect Phenomenon
▪ A Frequency Monitoring Unit for Broadcast Stations
▪ Transmission Lines for Short-Wave Radio Systems
Vol. 11, No. 51933-01-012.23 MB▪ Evaluating Hearing Aids
▪ Music Wire Springs
▪ A Heterodyne Oscillator of Wide Frequency Range
▪ Combating Rust With Metallic Finishes
▪ Measuring Microphonic Noise in Vacuum Tubes
▪ Bus Announcing Outfits
Vol. 11, No. 61933-02-012.35 MB▪ A "Low-Hum" Vacuum Tube
▪ An Improved Wheatstone Bridge for Toll Test Boards
▪ Supplying Atmospheres of Known Humidity
▪ Light-Weight Transformers for Aircraft
▪ Portable Long Wave Testing Apparatus
▪ A Circuit for Measuring Longitudinal-Circuit Unbalance at High Frequencies
Vol. 11, No. 71933-03-012.06 MB▪ The Deformation of Matter
▪ Tuned-Transformer Coupling Circuits
▪ Mounting Quartz Plates
▪ A Radio Distribution System for Apartment Buildings
▪ A New P.B.X. for Large Establishments
▪ Power Equipment Laboratory
Vol. 11, No. 81933-04-012.22 MB▪ Measuring and Recording Low Humidities
▪ A Mercury Jig for Testing Toroidal Cores
▪ Experimental Paint and Varnish Compounding
▪ The New Oscillators for the Radio Frequency Range
▪ Loud Speakers Summon Physicians in the New York Hospital
▪ A New Service for Residents
▪ The Underwriters' Laboratories
Vol. 11, No. 91933-05-012.32 MB▪ The Reproduction of Orchestral Music in Auditory Perspective
▪ New Radio Telephone Equipment for Transport Airplanes
▪ A Three-Frequency Radio Telephone Transmitter for Airplanes
▪ A Crystal Control Superheterodyne Receiver
▪ Artificial Anthracite
Vol. 11, No. 101933-06-012.08 MB▪ An Acoustic Illusion Telephonically Achieved
▪ A Compression Test for Soft Solids
▪ Uses of Filters in Carrier Systems
▪ Mushrooms and Maintenance
▪ Delayed Speech
▪ Improved Current Control for Low Range Meter Calibration
Vol. 11, No. 111933-07-013.59 MB▪ The Panel Dial System
▪ A Stroboscope for Checking the Speed of Subscribers' Dials
▪ The Bell System Exhibit at the Century of Progress Exposition
▪ A Sensitive Method of Measuring Corrosion
▪ Soft Rubber Earpiece for the Audiphone
▪ Charging Batters Without a Generator
Vol. 11, No. 121933-08-012.73 MB▪ Harold de Forest Arnold
▪ Seeing Sound at the Chicago Exposition
▪ Radio Telephone Communication with the Caribbean Countries
▪ Voice Frequency Control Terminals for Caribbean Radio Systems
▪ The 13A—A Radio Receiver for Diversified Uses
▪ A Radio Transmitter for Central American Service
Vol. 12, No. 11933-09-012.42 MB▪ Filters in Action
▪ Direct Current Conduction in Dielectrics
▪ Water at West Street
▪ Gases in Metals
▪ A Current Transformer for Low Radio Frequencies
▪ Fuses
Vol. 12, No. 21933-10-014.20 MB▪ The Caesium-Oxygen-Silver Photelectric Cell
▪ Electrical Leakage Over Glass Surfaces
▪ Differential Pitch Sensitivity of the Ear
▪ Wetting of Solids by Liquids
▪ A One-Pair Loaded Emergency Cable
▪ Moisture-Proofing Transmitters with Rubber
▪ The 80A Amplifier
Vol. 12, No. 31933-11-011.74 MB▪ Ultra-Short-Wave Transmission
▪ X-Ray Examination for Metal Defects
▪ Measuring Inductance with a Resistor
▪ An Artificial Ear for Receiver Testing
▪ An Artificial Voice for Transmission Studies
▪ Amplifying Watch Sounds
▪ Evaluating Arc Resistance of Insulating Materials
Vol. 12, No. 41933-12-011.88 MB▪ A 100 Kilowatt Vacuum Tube
▪ Lubricating Brushes for M-Type Generators
▪ Weatherproofing of Telephone Wires
▪ Equalizers In Open-Wire Carrier Circuits
▪ Minimizing Modulation in Transformers
▪ Telephone Manufacturing Information
Vol. 12, No. 51934-01-011.88 MB▪ Permanent Magnets
▪ First Aid Kits and Facts
▪ Entrance Cables for Carrier Toll Circuits
▪ Distributing Toll Tickets by Pneumatic Tubes
▪ Moving the Toll Ticket
▪ Long Distance Telegraph Circuits
Vol. 12, No. 61934-02-011.41 MB▪ Open-Wire Program Circuits
▪ Line Filters for Open-Wire Program Circuits
▪ Resistance Lamps
▪ A Continuously Adjustable Band Pass Filter
▪ Testing the Life of Dial Apparatus By Machines
▪ A Self-Contained Bridge for Measuring Both Inductive and Capacitive Impedances
▪ A Mathematical Theory of Rational Inference
Vol. 12, No. 71934-03-013.26 MB▪ Auditory Perspective
▪ Auditorium Acoustics and Control Facilities for Reproductions in Auditory Perspective
▪ Loud Speakers and Microphone for Auditory Perspective
▪ Long Distance Transmission for Auditory Perspective
▪ Pounds of Prevention—Gas-Filled Cables
▪ Western Electric Noiseless Recording
Vol. 12, No. 81934-04-011.60 MB▪ Audio-Frequency Atmospherics
▪ How Sharply Can a Metal Part Be Bent?
▪ Regulation of Central-Office and Tie-Trunk Service in Private Branch Exchanges
▪ Reproduction of Pencil-on-Paper Drawings by Mechanical Means
▪ Surveying in Curbed Spaces
▪ Measurement of Transmission Loss Through Partition Walls
▪ The Oxidation of Organic Substances
Vol. 12, No. 91934-05-011.58 MB▪ New Airport Receivers
▪ A Highly Selective Weather and Beacon Radio Receiver for Airplane Use
▪ Remote Tuning Controls for Aircraft Radio Receivers
▪ Articulation Testing
▪ Automatic Articulation Testing Apparatus
▪ Adapting the Telephone Repeater to Train Dispatching
▪ Vitamin B
Vol. 12, No. 101934-06-011.62 MB▪ Feedback Amplifiers
▪ A Telephone for Use in Explosive Atmospheres
▪ Testing in Explosive Atmospheres
▪ The Direction of Arrival of Radio Waves
▪ Neutralizing Disturbance Voltages in Communication Circuits
▪ Winding Silica Springs
Vol. 12, No. 111934-07-011.91 MB▪ Early Handsets
▪ Joints in the Insulation of Submarine Cable
▪ Maintaining Quality in Bell System Dry Batteries
▪ No. 8 Test and Control Board
▪ Jacks and Plugs for Portable Telephones
▪ A 5000-Volt Mercury-Vapor Rectifier for the 6B Radio Broadcasting Transmitter
Vol. 12, No. 121934-08-011.39 MB▪ Trunking as a Problem of Probability
▪ Standardizing Basic Electrical Units
▪ Dissipation Constants in Solids
▪ Toll Transmission Measuring System for the No. 8 Test and Control Board
▪ The Electrical Constants of the Ground
▪ Retardation Coils for Precision Filters
▪ Adjusting Precision Filters
Vol. 13, No. 11934-09-011.84 MB▪ Speech Input Equipment for Radio Broadcasting
▪ Iron-Cobalt Alloys
▪ Testing Cable Sheath for Fatigue
▪ A Portable Oscilloscope
▪ The Trunk Group Busy Register
▪ The Switchboard Cord
▪ An Improved Bend Tester
Vol. 13, No. 21934-10-011.38 MB▪ An Extension of Land Telephone Lines by Ultra-Short Wave Radio
▪ Magnetic Materials
▪ Diffusion of Water Through Organic Insulating Materials
▪ The Regulation of Transmission Over Open-Wire Lines at Carrier Frequencies
▪ Acoustic Spectrometer
Vol. 13, No. 31934-11-012.15 MB▪ Some Principles of Transposing Open-Wire Lines
▪ The Nature of Water Adsorbed on Cellulose
▪ A High-Speed Level Recorder for Acoustic Measurements
▪ At the America's Cup Races
▪ Microanalysis
▪ Gas-Filled Thermionic Rectifiers
Vol. 13, No. 41934-12-011.95 MB▪ The Voice-Operated Compandor
▪ The Lineman's Leather Lifeline
▪ Spot Welding
▪ Observing the Corona
▪ The Holmdel Laboratory
▪ An Improved Volume Indicator
Vol. 13, No. 51935-01-012.17 MB▪ Loudness and Pitch
▪ High Frequency Resistance Standard
▪ Evaluation of Organic Finishes
▪ The Six-String Oscillograph
▪ Galvanometry in Vacuo
▪ A Portable Public Address System
Vol. 13, No. 61935-02-011.63 MB▪ Disturbances in Radio Transmission
▪ The New Telephotograph System
▪ Vacuum Tubes at Very High Frequencies
▪ Trials of New Wide-Band Program Circuits
▪ A Wire-Wound Grid Resistance
▪ A High Precision Speed Regulator
Vol. 13, No. 71935-03-012.23 MB▪ The Ionosphere
▪ A Mirror for the Voice
▪ An Adjustable Oscillator of High Precision
▪ Insulation Resistance of Cotton
▪ Heat Treatment
▪ Depicting Currents in Telephone Lines
Vol. 13, No. 81935-04-011.92 MB▪ A 50-KW Radio Transmitter of High Fidelity
▪ Controlled Radiation for Broadcasting
▪ Calling by Whistle
▪ A High-Voltage Relay
▪ Primary Toll Test Boards
▪ Universal Alignment Chart
Vol. 13, No. 91935-05-012.16 MB▪ Mechanical Analysis of Waves
▪ A Telephone Set for Outdoor Use
▪ A General-Purpose Frequency Analyzer
▪ A Small Radio Transmitter for Police Duty
▪ A Bridge for Measuring Small Phase Angle
▪ Conduit Plugs
▪ Characteristics of Western Electric Vacuum Tubes
Vol. 13, No. 101935-06-011.86 MB▪ A Police Radio System for Newark
▪ A Recording Transmission Measuring Set
▪ A Marine Radio Compass
▪ Quartz Crystal Filters
▪ Dryness in Telephone Cables
Vol. 13, No. 111935-07-011.67 MB▪ Coaxial Conductor Systems
▪ Projecting Circuit Performance on a Screen
▪ Recent Advances in Microphonic Research
▪ Measuring Displacements of Microphone Contacts
▪ Short-Wave Programs for Waldorf Guests
▪ Holding the Ticket
Vol. 13, No. 121935-08-011.76 MB▪ The Barkhausen Oscillator
▪ Balancing Crosstalk in Toll Cables
▪ A Bone-Conduction Receiver for the Audiphone
▪ The Bridged T Equalizer
▪ A High-Quality Broadcast Transmitter of Medium Power
▪ A New Vacuum Tube for Ultra-High Frequencies
Vol. 14, No. 11935-09-012.15 MB▪ Control of Alignment of Sequence Switch Drives
▪ Two Types of Dielectric Polarization
▪ Two-Way Police Radio System
▪ A Mobile Transmitter for the Ultra-High Frequencies
▪ The Dielectric Behavior of Camphor
▪ Heat Treatment in Magnetic Fields
▪ Impact Tester for Moulded Insulating Materials
Vol. 14, No. 21935-10-011.93 MB▪ A Non-Directional Microphone
▪ Hysteretic Modulation
▪ Telegraph Testing Facilities
▪ A Speech Amplifier for Police Radio
▪ Centrifugal Type Voltage Regulators
▪ Quiet Amplifier Tubes
▪ Carrier Frequency Heterodyne Oscillator
▪ Soldering Lead Cable Electrically
▪ An Ultra-High-Frequency Radio Receiver for Police Use
Vol. 14, No. 31935-11-014.96 MB▪ Vacuum Tube for Small Current Measurements
▪ Acoustical Test Chamber With Cloth Walls
▪ Under-Rug Telephone Cordage
▪ A Radio Beacon Transmitter for WOR
▪ Soft Solders
▪ A Test Car for Marine Radio Telephone Surveys
▪ High-Fidelity Radio Transmitter for Ultra-High Frequencies
Vol. 14, No. 41935-12-012.27 MB▪ Earth Current Measurements
▪ Propagation of Ultra-Short Radio Waves
▪ Preparing Metals for Microscopy
▪ Wind From Quartz Crystals
▪ Radio Bridges Hurricane Break
▪ Measuring Inductance of Coils With Superimposed Direct Current
▪ A Radio Transmitter for the Private Flyer
▪ A Bend Tester for Vacuum Tube Wires
Vol. 14, No. 51936-01-011.74 MB▪ Novel Design Adapts 3A TWX to Wide Range of Conditions
▪ The 307A Power Pentode
▪ Measuring Delay on Picture-Transmission Circuits
▪ An Adjustable Precision Standard of Phase Difference
▪ A Radio Receiver for the Private Plane
▪ A Radio Compass for Aircraft
▪ Transformer Testing Laboratory
Vol. 14, No. 61936-02-012.10 MB▪ The Telephotograph Line
▪ New Carrier Loading Equipment for Entrance Cables
▪ Secretarial Service
▪ Delay Equalizers for Telephotograph Transmission
▪ "Balance" in Railroad Dispatching Circuits
▪ Locating Toll-Cable Faults
Vol. 14, No. 71936-03-012.37 MB▪ Electron Diffraction Analysis
▪ Paint Films of Controlled Thickness
▪ Testing Problems in Outside Plant Development
▪ Direction of Motion of Oscilloscope Spot
▪ Sound System for Program Distribution
▪ A Theory of Shielding
▪ Measurements of Noise on Program Circuits
▪ Improved Transmission-Measuring System
▪ An Inexpensive Thousand-Cycle Generator
▪ A Submarine Loading Case
Vol. 14, No. 81936-04-012.14 MB▪ Elastic Vibrations of Quartz
▪ Dialing Ships at Sea
▪ Lead Sleeve Cases for Loading Coils
▪ High Permeability and Plastic Flow in Magnetic Fields
▪ An Electrical Stethoscope for the General Pratitioner
▪ Life Test Recorder
▪ Field Trial for New Two-Wire Toll Circuits
Vol. 14, No. 91936-05-011.93 MB▪ Electric Wave Guides
▪ A "Hit" Suppresor
▪ Amplitude Compression in Long Telephone Circuits
▪ New Telephone Booth
▪ Testing for Air Contamination in Manholes
▪ Studies of Single-Sideband Short-Wave Transmission
▪ A Broadcast Frequency Measuring Set
▪ A Telephone As a Conference Aid
Vol. 14, No. 101936-06-011.62 MB▪ Effect of Electric Shock on the Heart
▪ High-Fidelity Radio Broadcasting
▪ Adhesives
▪ A New Power Amplifier of High Efficiency
▪ X-Ray Diagnosis for Telephone Apparatus
▪ An Acoustic Resistance Meter
Vol. 14, No. 111936-07-011.79 MB▪ Multi-Frequency Radio Transmitter
▪ Reforming Telegraph Signals
▪ Automobile Finishes
▪ The 300A Vacuum Tube
▪ Transmission Improvements in Telegraph Loop Circuits
▪ Insuring Quality in Tapes
Vol. 14, No. 121936-08-011.65 MB▪ Dowsing for Cable
▪ The Grounded Vertical Radiator
▪ A One-Tube Carrier System
▪ Mathematics and Electrical Communication
▪ The 86 Type Amplifier
▪ A Single-Sideband Short-Wave Receiver
Vol. 15, No. 11936-09-012.50 MB▪ An All-Purpose Radio Receiver for Mobile Applications
▪ Teletypewriter Exchange Systems
▪ Molecular Rotation in Organic Crystals
▪ Out-of-Block Protector
▪ Directive Antenna Solves Coverage Problem
▪ Telephone Hand Tools
▪ New Reproducer System for Small Theatres
▪ The Impinger
Vol. 15, No. 21936-10-012.89 MB▪ Rubber Research
▪ Determining Circuit Characteristics at Low Frequencies
▪ Developing the 106A1 Regenerative Telegraph Repeater
▪ Remote Control for Radio Receivers
▪ Automatic Comparator for Characters on Perforated Teletypewriter Tape
▪ Automatic Measurement of Transmission
Vol. 15, No. 31936-11-012.06 MB▪ Buried Telephone Wire
▪ A New 5-kw Broadcast Transmitter
▪ A Machine for Testing Enameled Wire
▪ Copper Oxide Rectifiers for Telephone Power Supply
▪ Apparatus Card Catalog
▪ Relaxation Time in Dielectrics
▪ Protecting Communication Circuits at Power Stations
Vol. 15, No. 41936-12-013.20 MB▪ Synthesizing Speech
▪ A Metallographic Microscope of Exceptional Power
▪ Impact Tester for Organic Finishes
▪ Vacuum Tube Improves Selective Ringing
▪ The 313A Vacuum Tube
▪ Tonlars
▪ A Wide-Range Oscillator for the Higher Frequencies
▪ Protection Against Lightning Interference
▪ Laminated Phenolic Insulating Materials
▪ "The Renaissance of Physics"
Vol. 15, No. 51937-01-012.65 MB▪ Talking Battery
▪ How Pitch Changes with Loudness
▪ Non-Spreading Lubricating Oils
▪ Apparatus Specifications
▪ New Carrier System Filters
▪ A Modernized Hearing Meter
▪ Decibel Meters
▪ A New Chair for Operators
Vol. 15, No. 61937-02-012.21 MB▪ A Half-Meter Tube
▪ Stabilized Feedback for Radio Transmitters
▪ Measuring the Plating on Screw Threads
▪ Remagnetizer for Ringer Magnets
▪ A Telegraph Signal Biasing Set
▪ Paper Insulation in Telephone Construction
▪ Mercury Switch for Telephone Booths
▪ A Watch-Rate Recorder
Vol. 15, No. 71937-03-012.06 MB▪ Modulation in the G-1 Carrier System
▪ Around-the-World Radio Echoes
▪ Fields Caused by Remote Thunderstorms
▪ Sound Reinforcing System for Hollywood Bowl
▪ A New Timing Motor for Oscillographs
▪ Measuring Loudspeaker Response Automatically
▪ Thin Crystals
Vol. 15, No. 81937-04-012.72 MB▪ Broad-Band Carrier Systems
▪ Measurement of Attenuation at High Frequencies
▪ A New Noise Meter
▪ A New Message Register Camera
▪ A 5-Megacycle Impedance Bridge
▪ Applying Solderless Cord Tips in the Field
▪ A New Ring for Distributing Frames
Vol. 15, No. 91937-05-011.56 MB▪ The Coaxial Cable System
▪ A Noise Reducer for Radio-Telephone Circuits
▪ Conditioning Insulating Materials for Test
▪ Telephotograph Transmitter and Receiver
▪ Terminal Equipment for Telephotography
▪ Regulated Plate Supply
Vol. 15, No. 101937-06-011.66 MB▪ Loudness Measurements
▪ Volume Limiter Circuits
▪ A Line-Busy Recorder
▪ The Surface Wave in Radio Transmission
▪ Construction of the Coaxial Cable
▪ Installing the Coaxial Cable
Vol. 15, No. 111937-07-014.66 MB▪ The Crossbar Switch
▪ A Power Amplifier Tube for Ultra-High Frequencies
▪ Rectifier for Telephone Power Supply
▪ A High-Quality Headset for Monitoring
▪ Carrier for Coaxial Groups
▪ Group Terminal for the Coaxial System
Vol. 15, No. 121937-08-012.36 MB▪ 101-Type Key Equipments
▪ Crosstalk Measurements
▪ A Diverter-Pole Generator for Battery Charging
▪ Repeaters for the Coaxial System
▪ High-Frequency Supply for Degassing
Vol. 16, No. 11937-09-012.04 MB▪ Magnetic Recording and Reproducing
▪ Eddy Current Shielding in Laminated Cores
▪ New Tubes for Carrier Systems
▪ Quartz Plates for Frequency Sub-Standards
▪ Vibration Studies with the Rapid Oscillograph
Vol. 16, No. 21937-10-011.62 MB▪ The 1A Teletypewriter Switchboard
▪ Equivalent Networks for Negative-Grid Triodes
▪ Supplying Power to Central Offices
▪ An Ultra-Short Wave Circuit for Palomar Observatory
▪ Diphonic Loudspeaker for Mirrorphonic Sound Systems
▪ Limitations in High-Frequency Band Filter Design
▪ A Multi-Channel Radio Monitoring System
▪ High Dispersion X-Ray Spectrometer
Vol. 16, No. 31937-11-014.34 MB▪ The Type-H Carrier Telephone System
▪ Low-Cost Microphone for Varied Application
▪ Non-Corroding Rubber Insulation for Telephone Cords
▪ A Filter for Airway Range Systems
▪ An Inexpensive Bridge for Capacitance and Conductance Measurements
▪ Open-Wire Line Losses
▪ High-Frequency Attenuator
▪ Vapor-Pressure Humidostat and Thermostat
Vol. 16, No. 41937-12-011.59 MB▪ Coaxial Cable System Transmits Motion Pictures
▪ New Cathode-Ray Tubes
▪ Variation of Cable Loss with Temperature
▪ Transmission Line Structures as High-Frequency Networks
▪ Pressure Cleaning
▪ Forecasting Sunspots and Radio Transmission Conditions
▪ The Isograph—A Mechanical Root-Finder
▪ The Mechanism of the Isograph
▪ Conductance in Telephone Cables
Vol. 16, No. 51938-01-011.89 MB▪ Principles of the Musa
▪ Musa Apparatus
▪ Automatic Adjustments in Radio-Telephone Control Terminals
▪ A New Micrometer Ratchet
▪ Aluminum Alloy Structural Materials
▪ The Teletypewriter Exchange Network
▪ The No. 5 Teletypewriter Switchboard
▪ Higher Volumes Without Overloading
▪ A Volume-Limiting Amplifier
Vol. 16, No. 61938-02-011.97 MB▪ Television Over the Coaxial Cable
▪ Transmission Characteristics of the Coaxial Structure
▪ An Anti-Static Loop for Aircraft
▪ The Musa from the Outside
▪ The Carrier Telephone Alphabet
▪ Noise Measurements and the International Conference on Acoustics
Vol. 16, No. 71938-03-011.73 MB▪ Applying the Type-H Carrier Telephone System to Railroads
▪ Hearing Impairment and Sound Intensity
▪ Higher Magnetic Permeabilities
▪ Experimental Results from the Musa
▪ Permanent Magnet Machines for Telephone Offices
▪ Power Supply for the Coaxial Repeaters
▪ Stability of Reception at Two Meters
▪ Noise Protection for Voice-Operated Devices
▪ Protective Circuits for Antenna-Coupling Networks
Vol. 16, No. 81938-04-011.58 MB▪ Broad-Band Carrier System for Cables
▪ Steel in the Telephone Plant
▪ A Multi-Frequency Transmitter for the Private Plane
▪ Improved Methods in Cable Testing
▪ High-Speed Motion-Picture Photography
▪ New Magnetic Telephone
▪ Precise Measurement of Insertion Phase Shift
▪ A Recording System for Transmission Measurements
▪ Console-Type Speech-Input Equipment
Vol. 16, No. 91938-05-011.72 MB▪ The U-Type Relay
▪ Electron Multiplier Design
▪ The Y-Type Relay
▪ Channel Terminal Equipment for Broad-Band Carrier Systems
▪ Time Lag in Gas-Filled Photoelectric Cells
▪ Laboratory Tests of Wood Preservatives
Vol. 16, No. 101938-06-011.55 MB▪ The Crossbar Switch in the 755 PBX
▪ The 755 PBX
▪ An Inductance and Capacitance Bridge
▪ Making Broadcast Synchronization Easy
▪ Short-Circuiting Relay Protectors
▪ Design Features of Short-Circuiting Relay Protectors
▪ Oscillating Crystal
▪ A New Coastal Marine Radio Telephone Set
Vol. 16, No. 111938-07-011.76 MB▪ Carrier Supply for Type K Systems
▪ Paper as a Medium in Microanalysis
▪ Experiments on Talking Contacts
▪ A Voice-Operated Return-Loss Measuring Set
▪ A Teletypewriter Switchboard for Private Line or PBX Service
▪ The 281A Program Line Panel
▪ Gas Tube Voltage Recorders
▪ Tool Kit for Teletypewriter Maintenance
Vol. 16, No. 121938-08-012.00 MB▪ Rubber-Insulated Station Cords
▪ Acoustic Delay Circuits for Laboratory Use
▪ Acoustic Attenuators
▪ Improvements in Relay Coil Insulation
▪ Reducing Disturbances Produced on Telephone Circuits by Power Rectifiers
▪ Lifting a Finger Against Noise
▪ Pilot-Wire REgulators for Voice-Frequency Cable Circuits
Vol. 17, No. 11938-09-012.36 MB▪ A 50-KW Broadcast Transmitter
▪ Improved Design for Five-Kilowatt Broadcast Transmitter
▪ Electron Analysis of Stearic Acid Films
▪ Charging Control for PBX Batteries
▪ Simplified Balancing Networks for Toll Cables
▪ A Radio Telephone Set for Small Vessels
▪ Regulated Tube Rectifiers Using Magnitude Control
▪ Grid-Controlled Rectification Used in Small 48-Volt Power Plant
Vol. 17, No. 21938-10-011.76 MB▪ Noise Prevention in Telephone Circuits
▪ A Call-Thru Test Set
▪ Suppressor-Grid Modulation
▪ Filters for H-1 Carrier Telephone System
▪ A Vogad for Radio-Telephone Control Terminals
▪ General Features of Teletypewriters
▪ Magnetizing by Condenser Discharge
▪ Channel Crystal Filters for Broad-Band Carrier Systems: Electrical Features
▪ Channel Crystal Filters for Broad-Band Carrier Systems: Physical Features
Vol. 17, No. 31938-11-011.47 MB▪ Drying Cable Splices by Desiccants
▪ 22A Radio Transmitter
▪ Time Intervals in Telephone Conversation
▪ The New 94-Type Bridging Amplifier
▪ Magnetic Shields
▪ Magnetic Shields for Transformers
▪ Tne No. 4 Order Turret
Vol. 17, No. 41938-12-011.45 MB▪ Spacing of Telephone Wires
▪ Ringing Power for Large Offices
▪ Four-Wire Circuits in Retrospect
▪ High-Frequency Attenuation on Open-Wire Lines
▪ Improved Program and Line Amplifiers for the Broadcast Studio
▪ Distributing Time Announcements
Vol. 17, No. 51939-01-011.93 MB▪ Generation of Reference Frequencies
▪ Measuring Permeability Under Stress
▪ A Lighted Display Board for Crossbar Calls
▪ Repeaters for the Type-K Carrier System
▪ The 554A Tool
▪ Template for Graphing Audio-Amplifier Performance
▪ Identifying Cable Wires
▪ A Portable Telephone for Railroads
▪ Regulation for Type-K Carrier
Vol. 17, No. 61939-02-011.52 MB▪ Pedro the Voder—A Machine That Talks
▪ The Crossbar System
▪ Telephone Alarm Fuses
▪ Long-Distance Conference System
▪ Crosstalk Balancing for the Type-K Carrier System
▪ Crosstalk Poling for the Cable Carrier System
▪ Anti-Vibration Support for Sensitive Portable Galvanometers
▪ Portable Emergency Radio-Telephone Equipment
Vol. 17, No. 71939-03-011.45 MB▪ Spectrochemical Analysis
▪ Suppressing Noise and Crosstalk on the Type-K Carrier System
▪ Molded Telephone Apparatus Design
▪ Crossbar Trunking
▪ A New Telegraph Transmission Measuring Set
▪ New Test Set for Identifying Telephone Wires
Vol. 17, No. 81939-04-013.12 MB▪ Crossbar Senders
▪ Coördinated Induction Tests on an A-C Electrified Railroad
▪ 356A Vacuum Tube
▪ Power Plant for Broad-Band Repeater Stations
▪ Lockout in Long Telephone Circuits
▪ Sound-Level Distribution Recorder
▪ A New Page Teletypewriter
▪ A Small Pre-Mixing Amplifier
Vol. 17, No. 91939-05-012.33 MB▪ The Crossbar Line-Link Frame
▪ A Precision Clock for Telephone Time
▪ Extruded Lead Casings for Condensers
▪ Holding-Magnet Selector for Teletypewriters
▪ The Story of the 2B Regulator
▪ The 17B Oscillator
▪ A Longitudinal-Noise Filter for the Type-K Carrier System
▪ The Multi-Contact Relay
Vol. 17, No. 101939-06-012.40 MB▪ Noise at Telephone Locations
▪ Measuring Transmission Speed of the Coaxial Cable
▪ Television Pick-Up Over Telephone Cable Pairs
▪ An Automatic Power Plant for Toll Systems
▪ A Vacuum-Tube Testing Set for Carrier Systems
▪ A General-Purpose Electromagnet
▪ The Bell System at the New York World's Fair 1939
▪ Sender-Link and Controller Circuits
▪ Originating Markers
▪ A Radio Slide Rule
Vol. 17, No. 111939-07-011.27 MB▪ A Cardioid Directional Microphone
▪ Optical Properties of the Alkali Metals
▪ The Anti-Sidetone Station Circuit
▪ A Precise High-Frequency Inductometer
▪ Increasing the Range of Tripping Relays
▪ Number Decoding by Terminating Markers
▪ A Ringing Machine for Small Offices
▪ New Mobile Radio Equipment
Vol. 17, No. 121939-08-011.83 MB▪ Sorption of Water by Organic Insulating Materials
▪ Terminating Markers: Busy Testing and Line-Choice Selection
▪ Time Characteristics of the U-Type Relay
▪ Portable High-Frequency Transmission-Measuring Set
▪ Simplifying the Adjustment of Antenna Arrays
▪ Jacks for Main Distributing Frames
Vol. 18, No. 11939-09-011.35 MB▪ The Longitudinal Circuit
▪ The Ortho-Technic Audiphone
▪ The 710A Bone-Conduction Receiver
▪ Dialing Incomings
▪ A One-Kilowatt Broadcast Transmitter
▪ Lockout Circuits
▪ Optical Curve Analysis
Vol. 18, No. 21939-10-011.69 MB▪ Television Transmission Over Telephone Cables
▪ Crossbar Trunking Studies
▪ A Level Compensator for Carrier-Telegraph Systems
▪ Magnetic Materials Testing
▪ The Spark Chronograph
▪ Continuous Breakdown Test for Enameled Wire
▪ Beryllium Copper
Vol. 18, No. 31939-11-011.28 MB▪ Weather by Telephone
▪ Weather-Announcing Tape Machine
▪ An Artificial Mastoid for Audiphone Measurements
▪ A Remotely Controlled Radio Receiver
▪ Gas-Tube Noise Generator for Circuit Testing
▪ Single-Sideband Short-Wave Receiver
▪ Testing Shields for Carrier-Frequency Line Structures
▪ Remote Control of Radio Systems
Vol. 18, No. 41939-12-011.25 MB▪ Analysis of World's Fairs' Hearing Tests
▪ The 3B Toll Switchboard
▪ Measuring Lines for Program Transmission: I–The 19-Type Oscillator; II—The 13A Transmission-Measuring Set
▪ Field Tests of the Crossbar System
▪ Beat Notes in High-Frequency Calibration
▪ Operator-Training Facilities at Toll Switchboards
▪ The Vocoder
Vol. 18, No. 51940-01-011.72 MB▪ The Manahawkin Musa
▪ Equipment for the Demonstration Toll Call
▪ Automatic Cathode-Ray Oscillograph
▪ Radio Compass for Small Vessels
▪ Transpositions
Vol. 18, No. 61940-02-011.61 MB▪ The Coronaviser
▪ Circuit Features of the 3B Toll Board
▪ Feedback Improves Electromechanical Recording
▪ The Exponential Transmission Line
▪ Frequency Modulation
▪ Magnetic Strain Gauge for Cable Sheath
▪ Effect of Extended Signaling Range for Subscriber Loops
▪ New Coils for Operators' Telephone Sets
▪ Laboratory Tests of the Crossbar System
Vol. 18, No. 71940-03-011.93 MB▪ A Demonstration of Guided Waves
▪ Crosstalk Balancing Coils for the Type-K Carrier System
▪ High-Speed Motion Pictures of the Human Vocal Cords
▪ The "Telephone Clock"
▪ Outside Plant Field Laboratory
▪ Improved Repeater Tubes
Vol. 18, No. 81940-04-011.36 MB▪ A Broad-Band Carrier System for Open-Wire Lines
▪ A Crosstalk Reference Standard
▪ Motor-Driven Switchboard Clock
▪ Crossbar Call-Indicator Pulsing
▪ Electron Diffraction Patterns of Silica and Aluminum Hydrate
▪ Dielectric Loss in Ice
▪ Code Ringing Supply for Community Dial Offices
▪ Metal Horns as Radiators of Electric Waves
▪ An Improved Loud-Speaking Telephone
▪ A Relay Chatter Meter
Vol. 18, No. 91940-05-011.76 MB▪ Stereophonic Recordings of Enhanced Music
▪ Stereophonic Reproduction From Film
▪ Intertoll Dialing With Step-by-Step Selectors
▪ Printing Techniques in Analytical Chemistry
▪ Electrographic Printing
▪ Audition Demonstration
▪ Contacts for Crossbar Apparatus
▪ Transmission Features of the Weather Announcement System
Vol. 18, No. 101940-06-011.46 MB▪ Hearing-Test Machines at the World's Fairs
▪ Terminal Circuits for the J Carrier System
▪ Telephone Facilities for Airport Traffic Control
▪ A Wiping Solder With Improved Handling Characteristics
▪ Spots on the Sun
▪ The "Vu" and the New Volume Indicator
▪ The 1A Key Telephone System
Vol. 18, No. 111940-07-011.52 MB▪ Varistors: Their Characteristics and Uses
▪ Cables for the J Carrier System
▪ Improvements in Drop Wire
▪ Television for National Republican Convention
▪ A Signalling System for Intertoll Dialing
▪ Sound Tests of Telephone Ringers and Dials
▪ Alarm System for Auxiliary Repeater Stations
Vol. 18, No. 121940-08-011.82 MB▪ The C5 Carrier System
▪ New Hysteresis Model
▪ The 14C Program Amplifier
▪ Transmission Measuring Set for Outlying Telegraph Stations
▪ Heavy-Water Rochelle-Salt Crystals
▪ A Loud-Speaking Telephone System
▪ Crosstalk Balancing in the J-Carrier System
▪ Determination of the Average Life of Vacuum Tubes
Vol. 19, No. 11940-09-012.34 MB▪ Fifteen Years
▪ The Nature of Organic Insulating Materials
▪ Six-Way Directional Microphone
▪ New Voice-Frequency Electrical Delay Network
▪ Unit Ventilator
▪ Synchronized FM Transmitter
▪ Toll Crossbar Call-Distributing System
▪ A Dialing Circuit of Increased Range
▪ Magnetic Ultra-Micrometer
Vol. 19, No. 21940-10-012.01 MB▪ A Telephone Set for Explosive Atmospheres
▪ Silicon Carbide Varistors
▪ The C5 Carrier Terminal
▪ J Carrier in the Field
▪ Universal Phonograph Reproducer
▪ Engineering an Improvement in Panel Clutches
▪ Testing the Behavior of Improved Panel Clutches
Vol. 19, No. 31940-11-011.24 MB▪ Regulation for the J-2 Carrier Telephone System
▪ Dielectric Properties of Pigmented Rubber
▪ Protecting Switchboard Lamps with Varistors
▪ Wire-Joining Methods
▪ A Bridge for Measuring Core Loss
▪ "A Modern Aladdin's Lamp"
▪ An Interpolation Method for Setting Laboratory Oscillators
Vol. 19, No. 41940-12-011.16 MB▪ Thermistors, Their Characteristics and Uses
▪ Devices for Combining DB Levels
▪ Analysis of Losses in Magnetic Cores
▪ "Information" in Less Space
▪ Carrier and Pilot Supply for the J2 Carrier System
▪ Metallic Bridges Between Contact Points
▪ A Coupling Unit for Telephotograph Transmission
▪ Measuring the Air Flow of Small Fans
Vol. 19, No. 51941-01-011.32 MB▪ Stevens Point-Minneapolis Coaxial Cable
▪ Measurements of Orchestral Pitch
▪ The 1000-Cycle Ringer-Oscillator
▪ The Copper Oxide Varistor
▪ Repeaters for the C5 Carrier System
▪ Gopher-Protected Cables
Vol. 19, No. 61941-02-011.39 MB▪ Batteries in the Telephone Plant
▪ Dust-Storm Static
▪ The 2B Carrier Pilot Channel
▪ Earth Resistivity Measurements
▪ Power-Factor Correction Equipment for Central Offices
▪ Identifying Cable Wires
Vol. 19, No. 71941-03-011.28 MB▪ A Twin-Channel Single-Sideband Radio Transmitter
▪ Handling DSA Traffic at Toll Boards
▪ 451A-1 Radio Transmitter
▪ Autotransformer for Emergency Repair of Open-Wire Carrier Circuits
▪ Polarential Telegraph Operation
▪ Visual Ringing Signal
▪ Noise from Shunt Capacitors on Power Systems
▪ An Answering-Time Recorder
Vol. 19, No. 81941-04-011.74 MB▪ Remote Control for Reversible Program Circuits
▪ Detecting Faults While Laying Buried Telephone Wire
▪ Locating Hits on Telegraph Circuits
▪ National Defense and the Bell System
▪ "No-Such-Number" Tone for Dial Systems
▪ Studying the Performance of Toll Circuits
Vol. 19, No. 91941-05-011.51 MB▪ Step-by-Step Intertoll Dialing
▪ Aerial Cable Lashing Machine
▪ Lashed Aerial Cable
▪ Measuring System for Carrier Circuits
▪ Measurement of Dynamic Characteristics of Vacuum Tubes
▪ Circuit-Riding the Coaxial Cable
▪ Directional Selection for Toll-Line Signaling
▪ Internal Electro-Analysis
Vol. 19, No. 101941-06-011.40 MB▪ Film Scanner for Testing Television Transmission
▪ Ten-Frequency Airplane Radio Equipment
▪ Ten-Frequency Transmitter
▪ Ten-Frequency Receiver
▪ Wet Strength Tester for Paper
▪ Dielectric Strength Tests on Aerial Cable
▪ Conical Mandrel for Testing Organic Finishes
▪ The 355A Community Dial Office
▪ New Dial-Testing Machine
▪ Adjustable Filters for the 2B Pilot Channel
Vol. 19, No. 111941-07-011.46 MB▪ A Test Set for Pulse Repeaters
▪ Temperature Stability of the 2B Pilot Channel
▪ Electronic Inverter for Interim Power Supply
▪ Sound-Integrating Machine
▪ Telephone Systems Drawings
▪ Bell Laboratories Lecture Equipment
▪ Transmission Talk
▪ Secretarial Key Equipment Using Neon Signals
Vol. 19, No. 121941-08-011.54 MB▪ Radio Telephone Service in Chesapeake Bay
▪ Radio Equipment for the Crisfield Project
▪ Peak Voltages in Carrier Telegraphy
▪ Order-Disorder Transformations in Alloy Crystals
▪ Insulating Paper
▪ The Measurement of Modulation in Carrier Amplifiers
▪ Teletypewriter Oiler
▪ Extended Use of Rubber Insulation in Telephone Cords
Vol. 20, No. 11941-09-012.29 MB▪ The Mirrophone
▪ Facilities for Handling Large PBX Trunk Groups
▪ Conservation of Defense Materials in the Bell System
▪ Observational Standards
▪ Transcontinental Cable One-Fourth Completed
▪ Stock Records and Control
▪ V1 Telephone Repeater Arrangements
▪ Designing the V1 Repeater and Associated Equipment
Vol. 20, No. 21941-10-012.43 MB▪ Automatic Circuit for Determining Load Characteristics
▪ New Coin Collector With Handset
▪ Test for Corrosion of Painted Iron
▪ D-C Substitution Method of Measuring High-Frequency Attenuation
▪ Decentralized Filters for Central-Office Battery Supply
▪ Magnetostriction in Permalloy
▪ "Thru" Selector for Dial Toll Calls
▪ Torque on Silicon Iron Crystal in a Magnetic Field
▪ Crossbar Central B Board
Vol. 20, No. 31941-11-012.43 MB▪ Azimuth Indicator for Flying Fields
▪ Automatic Measurement of Crosstalk at Carrier Frequencies
▪ Environmental Factor in Corrosion
▪ Carrier Systems Help Defense Program
▪ 100-Megacycle Cathode-Ray Oscilloscope
▪ Rhombic Antenna Design
▪ Improvements in 755A P.B.X.
▪ Effect of Mounting-Plate Vibration on Relay Operation
▪ Rubber Handset for Linemen
▪ Dial for New Repairman's Test Set
▪ Switching Devices for Toll System Maintenance
Vol. 20, No. 41941-12-012.69 MB▪ Telephone Network Aids Air Raid Interceptors
▪ Improved Method of Splicing Rubber-Insulated Wire
▪ A Ten-Megacycle Oscilloscope
▪ The Bell System's Biggest Job
▪ Terminal Equipment for the L1 Carrier System
▪ Varistors as Modulators
▪ Station Keys for Telephones
▪ Routes of Broad-Band Carrier Systems
Vol. 20, No. 51942-01-012.91 MB▪ 160-Trunk Incoming Frames
▪ Loading Coils With Cores of Molybdenum Permalloy
▪ Cellulose Acetate Yarn Replaces Silk for Wire Insulation
▪ Stevens Point and Minneapolis Linked by Coaxial System
▪ An Improved Capacitance Bridge for Precision Measurements
▪ Abrasion Test for Finishes
Vol. 20, No. 61942-02-012.54 MB▪ Program Switching and Pre-Selection
▪ Mobilization of Science for the War Effort
▪ Generator for Dial and Busy Tones
▪ War-Time Activities of the Laboratories
▪ Preparation for Air Raids
▪ Highlights in the Bell System During 1941
▪ Crystallinity in Cellulose Esters
▪ Temporary Protection for Cable Splices
▪ Lodgepole Pine Poles
Vol. 20, No. 71942-03-012.34 MB▪ Measuring Small Relative Motions in Central-Office Switches
▪ Brittle Temperature of Rubber
▪ A Telephone Set for Exposed Locations
▪ High-Precision Frequency Comparisons
▪ Grounding of High-Gain High-Frequency Amplifiers
Vol. 20, No. 81942-04-012.14 MB▪ Behavior of Sulfur in Rubber
▪ Developments of the DSA Board
▪ Air-Raid Signal Demonstrated
▪ New Exchange Area Cable
▪ The C2 Control Terminal for Radio Telephone Circuits
▪ Typing Reperforator
Vol. 20, No. 91942-05-012.30 MB▪ Applications of Junction Line Filters
▪ The Junction Line Filter
▪ Small Ringer for Combined Subscriber's Set
▪ Printing Oscillator Scales
▪ A Circuit Continuity Test for the Crossbar System
Vol. 20, No. 101942-06-012.15 MB▪ Transoceanic Telephone Cables
▪ Magnetic Fluxmeter
▪ Lead Calcium Test Castings
▪ Portable Teletypewriter Equipment for Army
▪ The World's Telephones
▪ Factors Controlling Man-Made Radio Interference
▪ Suppressing High-Frequency Disturbances from Telephone Apparatus
▪ A Pilot-Channel Regulator for the K-1 Carrier System
Vol. 20, No. 111942-07-012.57 MB▪ Determining Color in Telephone Cable
▪ Automatic Production of Oscillator Scales
▪ Repeater for Submarine Telephone Cable
▪ Using Less Tin in Cable Joining
▪ Thickness of Aluminum Oxide Coatings
▪ A Grounded-Plate Amplifier for the F-M Transmitter
Vol. 20, No. 121942-08-012.94 MB▪ A Crossbar Tandem Office
▪ Impregnating Varnishes
▪ New Siren Has Successful Trial in New York City
▪ Baskey-Weave Telephone Cords
▪ Rubber Economy in Typewriter Cylinders
▪ Radiation Pattern of the Human Voice
Vol. 21, No. 11942-09-011.50 MB▪ Bell Laboratories and the War
▪ Partition Flexibility at Murray Hill
▪ Abrasion Test for Textiles
▪ Quality Control in Ordnance Inspection
▪ Handling Night Calls at a Dial PBX
Vol. 21, No. 21942-10-012.72 MB▪ Army-Navy Production Award Presented to the Laboratories
▪ The Job Is to Win
▪ A New Telephone Set for the Hard of Hearing
▪ 3A Code-Call Circuit
▪ A Simplified Tear Test
Vol. 21, No. 31942-11-012.27 MB▪ Greensalt Preservative for Telephone Poles
▪ A Spread-Scale Recorder
▪ Salvaging for Victory
▪ New Reference Frequency Equipment
▪ Central DSA Switchboard
Vol. 21, No. 41942-12-013.54 MB▪ Waiting for Lightning
▪ No. 7 Information Desk
▪ Sequence Switch Cam
▪ A Bridging Filter for Open-Wire Lines
▪ A New Frequency Divider for Obtaining Reference Frequencies
▪ Drafting Full Speed Ahead
▪ Solubility of Metals in Mercury
Vol. 21, No. 51943-01-012.73 MB▪ Stretching Toll Facilities for the Emergency
▪ Outdoor Telephone Booth
▪ Cable Splices and the Hostess Problem
▪ Greensalt Treatment of Poles
▪ Proving-in a Paper Micrometer
▪ Paper Condensers of the Bell System
▪ Radio-Frequency Voltmeter
Vol. 21, No. 61943-02-012.40 MB▪ A Super PBX for War Service
▪ School for War Training
▪ Acid Neutralization in Insulating Papers
▪ Rural Telephone Service Using Carrier on Power Lines
▪ Alarm and Comparison Circuits for Reference Frequency Equipment
Vol. 21, No. 71943-03-012.41 MB▪ The Signal Corps and the Laboratories
▪ Coastal Radio Telephone Systems
▪ Speeding Communication for the Alcan Highway
▪ Ultra-High Frequencies
Vol. 21, No. 81943-04-012.79 MB▪ Rubber Research Laboratory at Murray Hill
▪ Trigger Action from Secondary Electrons
▪ Using High Crystal Harmonics for Oscillator Control
▪ Testing and Rating Air Filters
Vol. 21, No. 91943-05-012.51 MB▪ The Philosophy of Toll-Test Boards
▪ Historic Firsts: The High-Vacuum Electronic Tube
▪ Influence of Physics on Chemistry
▪ Ceramics for High-Frequency Insulation
▪ Lightning Protection of Buried Cable
▪ New Synthetic Rubber Developed
▪ Increased Personnel
▪ Telephone Service for Small Army Detachments
▪ Purchase of Keystone System Authorized by F.C.C.
▪ In Uncle Sam's Service
Vol. 21, No. 101943-06-012.98 MB▪ Class-of-Service Signals in the Crossbar System
▪ Historic Firsts: Permalloy
▪ How Little Do We Hear?
▪ A Tuned Null Detector
▪ Equipment Features of the V1 Repeater
▪ The Giant Camera
▪ Civil Relief for Service Men
Vol. 21, No. 111943-07-012.26 MB▪ Electron Diffraction by Large Molecules
▪ Historic Firsts: The Condenser Microphone
▪ Crossbar Temrinating Equipment for Multi-Office Operation
▪ Resistance Lamps
▪ Neutralizing Inducted Voltages in Toll Signaling Circuits
Vol. 21, No. 121943-08-012.85 MB▪ Teletypewriter Test Sets
▪ Historic Firsts: Wave Filters
▪ Cable Wrapping Machine
▪ Pulsing Methods of the Dial System for Dial-to-Dial Calls
▪ Dialing Habits of Telephone Users
▪ Communication System Along Alcan Highway Now More Than Two-Thirds Completed
▪ Noise Measurements in Vacuum Tubes
▪ New Headset Permits Signal Men to Wear Helmets
Vol. 22, No. 11943-09-013.13 MB▪ FASTAX: An Ultra-High-Speed Motion-Picture Camera
▪ Historic Firsts: Long-Distance Radio Telephony
▪ How Well Do I Hear?
▪ Crossarm Strength Tests
▪ Acoustic Room and Test Apparatus
▪ Rotary Wire-Testing Machine
▪ Multivibrators
Vol. 22, No. 21943-10-012.79 MB▪ Gas-Tube Harmocin Generator
▪ Historic Firsts: Thermal Noise
▪ Mica for War Purposes
▪ Unifying Step-by-Step Equipment Arrangements
▪ Photographic Department
Vol. 22, No. 31943-11-012.89 MB▪ Philadelphia Adopts Automatic Toll Switching
▪ Historic Firsts: The Thermophone
▪ Locating Buried Cables Electrically
▪ Pulsing Between Dial and Manual Offices
▪ Steel Replaces Copper in Handset Parts
▪ Drop-Wire Painting Tool
▪ Molecular Orientation in Molded Plastics
▪ Communication and Invasion
Vol. 22, No. 41943-12-013.12 MB▪ Electrical Gun Director Demonstrated
▪ Carrier System for the Spiral-4 Cable
▪ Historic Firsts: The Negative Feedback Amplifier
▪ Telegraph-Transmission Measuring Set
▪ Outdoor Tests of Wood Preservatives
▪ Amplifier for Subscribers with Impaired Hearing
▪ Minutes Mean Lives
Vol. 22, No. 51944-01-013.26 MB▪ Substitute Materials in Telephone Booths
▪ Modernized "Information" for Large PBX's
▪ Historic Firsts: Airplane Radio Telephony
▪ Disintegration of Face Brick by Dissolved Salts
▪ Development of the Electrical Director
▪ Television Over Telephone Cable
▪ Registering "Busy Line" Frequency in the Crossbar System
▪ The Army Salutes Bell Laboratories
Vol. 22, No. 61944-02-012.47 MB▪ Flow Properties of Cellulose Esters
▪ Cable Slack-Puller
▪ Power Distribution for Murray Hill Buildings
▪ Crystals of Quartz
▪ Laboratories Engineers Make Parachute Jumps
Vol. 22, No. 71944-03-013.18 MB▪ Properties of Paracon
▪ Inspecting and Determining the Axis Orientation of Quartz Crystals
▪ Wood Housing for Outdoor Telephone Sets
▪ Mobile Field Testing Units
▪ Excerpts for A.T. & T. Annual Report
▪ Tinsel for Navy Telephones
▪ Historic Firsts: The Crystal Clock
▪ Captured Enemy Equipment Exhibited at the Laboratories
▪ Underwater Telephone Line
Vol. 22, No. 81944-04-012.58 MB▪ Polarographic Studies of Storage Battery Acid
▪ Crossbar Toll Switching System
▪ Processing Quartz
▪ Telephone Sets for Noisy Locations
▪ Relay Contact Welder
▪ An Automatic Vibration Analyzer
▪ Experimental Micro-Wave System Projected
Vol. 22, No. 91944-05-012.91 MB▪ Senders of the Crossbar Toll System
▪ Historic Firsts: High-Efficiency Amplifier for Radio Transmitters
▪ Multi-Channel Radio Telephone Spans the Chesapeake Entrance
▪ AT&T Announces Coaxial Program
▪ Portable Carrier Telepgraph for the Signal Corps
▪ Quartz Crystal Model
Vol. 22, No. 101944-06-013.10 MB▪ Spectrochemistry
▪ Magneto-Striction Noise from Telephone Wires
▪ Soldering Silicon Carbide Varistors
▪ Wire Communications in Military Operations
▪ Flatness and Parallelism in Quartz Plates
▪ Historic Firsts: The Horizontal Rhombic Antenna
▪ Field-Laboratory Test of Alloy Cable Sheath
Vol. 22, No. 111944-07-012.94 MB▪ Automatic Ticketing
▪ Historic Firsts: The Radio Link
▪ Hand Lapper for Quartz Crystals
▪ Call Distribution to Crossbar Toll Operators
▪ Ground Line Treatment of Standing Poles
▪ Metallurgy of Wiped Solder Joints
▪ Coin Collector and Directory Mounting
Vol. 22, No. 121944-08-012.55 MB▪ A Crystal Test Set
▪ Telephone Sets for Pipe Lines
▪ Loop Assignment and Selecting Order for Crossbar Toll Systems
▪ Radio Transmitter for the Signal Corps
▪ Low Temperature Properties of Rubbers
▪ A.B. Clark and A. Tradup Visit the European War Zones
▪ Markers for the Crossbar System
▪ Historic Firsts: Quartz Crystal Filters
▪ Nylon for Silk
Vol. 22, No. 131944-09-012.91 MB▪ Saving Mica by Testing
▪ Improved Graded Muultiple for Step-by-Step Offices
▪ Multi-Frequency Frame Identification in Crossbar Toll
▪ Historic Firsts: Electro-Magnetic Harmonic Generators
▪ Electrical Test for Moisture in Telephone Poles
▪ Micro-Motion Pictures of Rubber Latex
Vol. 22, No. 141944-10-013.11 MB▪ The Career of Frank Baldwin Jewett
▪ Senders for Automatic Ticketing in Step-by-Step Offices
▪ Electrical Director Helps Bring Down Buzz-Bombs
▪ Senders for Automatic Ticketing
▪ Maintenance Center for the Crossbar Toll System
▪ Torque Gauge of Screwdriver Type
▪ Emergency Reporting Systems
▪ New Woods for Crossarms and Their Preservation
Vol. 22, No. 151944-11-013.18 MB▪ Traffic Control for Crossbar Toll
▪ Instruction Manuals for the Army and Navy
▪ Major Problems of the Telephone Industry
▪ From the Diary of a Telephone Tradition
▪ Electron Diffraction Patterns of Copper-Gold Alloy
▪ Historic Firsts: Piezo-Electric Oscillator
▪ Drafting Facilities at Murray Hill
▪ Midget Tubes for High Frequencies
Vol. 22, No. 161944-12-012.52 MB▪ Electroplating Facilities at Murray Hill
▪ Handling Delayed Calls in Crossbar Toll
▪ To the Solomons and Back
▪ Coaxial Cables and Television Transmission
▪ A 1,000-g Centrifuge
▪ The Identifier—A New Member of the Switching Family
▪ Effect of Chemical Structure on Physical Properties of Synthetic Plastics
Vol. 23, No. 11945-01-011.93 MB▪ Tank Radio Set
▪ Historic Firsts: The Heising Modulator
▪ Tensioning Open Wire for J-Carrier Systems
▪ Daylight
▪ Plywood Radio Masts for Sigal Corps
▪ Junctor Grouping in Crossbar Toll
▪ Coördinate Cross-Connectors for Automatic Toll Ticketing
Vol. 23, No. 21945-02-011.53 MB▪ Operational Flight Trainer Demonstrated
▪ Rocket Researcher
▪ The Ribbon-Frame Camera
▪ Ten Minutes Over the Patuxent River
▪ War's Hunger for Telephone Plant Revealed in Tales Told by Splicers in Battle Zone
▪ A Meter Test Set
▪ A High-Gain Coxial Antenna
Vol. 23, No. 31945-03-011.24 MB▪ Chemically Stabilized Paper Capcitors
▪ Historic Firsts: Zero-Temperature-Coefficient Quartz Crystals
▪ A Volume Limiter for Leased-Line Service
▪ Excerpts From AT&T Annual Report
▪ A Pentode for the Battle Front in Three Days
▪ Bell System Network Facilities for FM Broadcasters
▪ Measurement of Small Motions
▪ Impedance Bridge With a Billion-to-One Range
▪ A Cathode-Ray Bridge Detector
Vol. 23, No. 41945-04-012.06 MB▪ Molecular Requirements for Synthetic Rubbers
▪ Manual Calls in Crossbar Toll
▪ Protecting Communications Equipmenbt for the Tropics
▪ The Chemical Laboratories
▪ Microwave Radiation From the Sun
▪ Enemy Versus American Air Power
▪ Self-Service Stockrooms
▪ Effect of Common-Channel Interference on Frequency-Modulation Broadcasting
▪ Wire-Supported Crystals
Vol. 23, No. 51945-05-013.07 MB▪ Laying Field Telephone Wire by Airplane
▪ Four-Wire Switching for Crossbar Toll
▪ Historic Firsts: High-Speed Submarine Telegraphy
▪ Tactical Pole Lines
▪ The Laboratories Rises to an Emergency
▪ John Mills
▪ Time and Weather
▪ Understanding the Discharged Veteran
▪ History of First Aid Training at the Laboratories
Vol. 23, No. 61945-06-012.63 MB▪ Military Telephone Instruments
▪ Historic Firsts: Copper-Oxide Modulators
▪ Reproductions
▪ United Nations Conference Telephone Service
▪ Synthetic Rubber for Wire Insulation
▪ Murray Hill Laboratories to Be Expanded
▪ Rapid Progress on Coaxial Cable Program Reported by AT&T Co.
▪ "The Plane With a Thousand Eyes"
Vol. 23, No. 71945-07-012.53 MB▪ The Voice of Ship Command
▪ Historic Firsts: Wire-Mounted Crystals
▪ Lightning-Protected Cable
▪ Service "On the Double" for Soldiers
▪ Rehabilitating a Telephone System
Vol. 23, No. 81945-08-012.38 MB▪ Exploring Magnetic Fields
▪ Scratch Adhesion and Mar Testing of Organic Finishes
▪ Reflex Oscillators
▪ To Leipzig and Back
▪ AT&T Announces Plan for Two-Way Vehicular Telephone Service
Vol. 23, No. 91945-09-012.38 MB▪ Polyethylene-Disc Insulators for Coaxials
▪ Radar and the Bell System
▪ Jungle Laboratory
▪ A Recording Camera for Testing Electrical Gun Directors
▪ Historic Firsts: The Peanut Tube
▪ Travelling Telephone Consulant
Vol. 23, No. 101945-10-012.78 MB▪ Air-Seal Test Set for Crystal Units
▪ The Outlook for Radio Relaying
▪ Nation-Wide Dialing
▪ Early Bell System Telegraph Services
▪ A Pit Gauge for Ceramic Tubes
▪ The Lookator
▪ Bell Laboratories Displays Its 1944 War Projects
Vol. 23, No. 111945-11-012.90 MB▪ Servo-Mechanisms
▪ Historic Firsts: Balancing Networks
▪ High-Speed Movies Under Water
▪ Comabting Enemy Air Activity
▪ Single-Line Telegraphy in Early Bell System Practice
▪ A Splice Detector for Army Field Wire
▪ D. B. Parkinson Visits Germany
▪ Laboratories Leaders Talk to Associated Company Men on Loan to the Laboratories
▪ Survey of German Communications
Vol. 23, No. 121945-12-013.56 MB▪ AN/TRC-6—A Microwave Relay System
▪ The 6BP Audiometer
▪ Multi-Frequency Pulsing
▪ Pigment Dispersion in a Synthetic Rubber Latex
▪ Quartz Crystal Plating
▪ Press Demonstration of the AN/TRC-6
Vol. 24, No. 11946-01-013.07 MB▪ Measuring Coaxials at Ultra-High Frequencies
▪ Glass-Sealed Resistors
▪ Visible Speech
▪ Trouble Indicator for the Sender-Link Frame
▪ CF-6-A Carrier Telegraph
▪ Relative Strength of Crossarms
▪ Football via Coaxial
Vol. 24, No. 21946-02-013.02 MB▪ Multiple Tube Rocket Launchers
▪ Fatigue Cracking of Coated Lead Alloys
▪ Historic Firsts: The Audiometer
▪ Duplex Crystals
▪ Mobile Service for Inter-City Highways
▪ Scientific and Engineering Texts
▪ The School for War Training
▪ First Call Made Over New Rural Power-Line Carrier
▪ The Whippany Radio Laboratory
Vol. 24, No. 31946-03-012.16 MB▪ Building Blocks for Long-Distance Army Communication
▪ Frequency Modulation by Non-Linear Coils
▪ Sulfur in Synthetic Rubbers
▪ Polystyrene Capacitors
▪ Magnetization and Stress
▪ Excerpts from AT&T Annual Report
Vol. 24, No. 41946-04-012.42 MB▪ The Bat—Radar-Controlled Glide Bomb
▪ A Wide-Angle Fastax
▪ Exploring Coils
▪ Historic Firsts: The Coaxial System
▪ Demountable Soundproof Rooms
▪ Television Via Coaxial From Washington to New York
▪ An Electro-Mechanical Page Turner
▪ Cable Damage by Gophers
▪ What We Thnk About Held Orders
▪ "Cloverleaf" Antenna for FM Broadcasters
Vol. 24, No. 51946-05-012.87 MB▪ Computer for Coastal Guns
▪ Rocket Spinner
▪ Telephone Order-Wire Circuit for Type-K Carrier Routes
▪ Pre-Prodction—A War Service
▪ Radio Lenses
▪ Mg [Magnesium]
▪ "It Helped Sink Six Jap Warships"
▪ Atlantic Highlands Laboratory
Vol. 24, No. 61946-06-012.52 MB▪ Preservative Treatment of Wood Cable Reels for Tropical Use
▪ The Multi-Cavity Magnetron
▪ Early Bell System Polar Telegraphy
▪ Radio Relay System Between Chicago and Milwaukee
▪ Government Designations
▪ Telephone Switching
▪ Long-Span Rural Pole Lines
▪ President Gifford at the AT&T Stockholders' Meeting
Vol. 24, No. 71946-07-011.73 MB▪ ADP and KDP Crystals
▪ Beachmaster Announcing Equipment
▪ The 6AR6 Tube
▪ Submarine Stalker Now Seeks Oil
▪ Telephone Service for St. Louis Vehicles
▪ Rural Radio Trial in Colorado
▪ Historic Firsts: Vacuum-Tube Voltmeter
▪ Communications in Germany
Vol. 24, No. 81946-08-012.00 MB▪ Madam, Will You Talk?
▪ Capacitor Life Testing
▪ Historic Firsts: The Orhophonic Phonograph
▪ A Battery-Ground Pulse Repeater
▪ Polly Gets the Japs
▪ Medal for Merit to R. I. Wilkinson for Service to Air Force
Vol. 24, No. 91946-09-012.06 MB▪ Airborne Search Radar
▪ Transoceanic Radio Amplifier
▪ Production of Airplane Radar Speeded by New Testing Technique
▪ Representing the Laboratories at the Front
▪ The Ballad of the Cedar Ants of Penetang
Vol. 24, No. 101946-10-012.66 MB▪ The SL Radar
▪ Fastax at Bikini
▪ Testing Tank Set Crystals
▪ Manufacturing Relations Speeds Production
▪ Loading the Spiral-4 for War
▪ Electrical and Mechanical Analogies
▪ Representing the Laboratories at the Front
▪ Waddell at Bikini
Vol. 24, No. 111946-11-012.13 MB▪ The Coaxial Conductor Expands in Size
▪ High-Flying Teletype
▪ Automatic Glazing Machine
▪ SJ Radar for Submarines
▪ Alarm System at Murray Hill
▪ Detecting Corona in Cables
▪ New Field-Wire Loading Coil
Vol. 24, No. 121946-12-012.58 MB▪ Measuring Inter-Electrode Capacitances
▪ The Beam Traveling-Wave Tube
▪ Pocket-Type Adhesion Tester for Organic Coatings
▪ Precision Resistance Networks for Computer Circuits
▪ Non-Linear Coils for Pulse Generators
▪ Blow Hot—Blow Cold: The M-9 Never Failed
▪ The Relay Interpolator
▪ Multi-Channel Two-Tone Radio Telegraphy
Vol. 25, No. 11947-01-012.86 MB▪ Examination of Power Coils
▪ The Ballistic Computer
▪ Relay Coils with Improved Longitudinal Balance
▪ Low-Altitude Radar Bombsight
▪ High-Speed Life Test for Capacitor Paper
▪ New FM Broadcast Transmitters
▪ Temperature Control in Coaxial Cable Repeater Huts
▪ Insulation for High-Voltage Pulse Networks
▪ The ABC of the Communications Engineer
Vol. 25, No. 21947-02-013.01 MB▪ A Relay Computer for General Application
▪ Submarine Detection by Sonar
▪ Toll Switchboard No. 6
▪ Navy Fire-Control Radars
▪ The Optical Proximity Fuse
▪ Echoes from the Atmosphere
▪ An Electrical Computer for Flight Training
Vol. 25, No. 31947-03-012.21 MB▪ Mr. Bell Invents the Telephone
▪ Measuring Microhardness by Indentation Tests
▪ Double-Speed Teletypewriter Transmission
▪ Echo Boxes for Radar Testing
▪ Continuous Electrical Computation
Vol. 25, No. 41947-04-012.93 MB▪ Vehicle Radiotelephony Becomes a Bell System Practice
▪ Magnetic Prospecting
▪ A Compact Lightweight Amplifier for Radar
▪ A Cathode-Ray Telegraph Distortion Measuring Set
▪ Measuring Megohms to a Few Parts in a Million
▪ Bell Centennial Ceremonies at Murray Hill
Vol. 25, No. 51947-05-012.80 MB▪ A Voyage By Radar
▪ Television: 20th Anniversary
▪ Ultra-Sound Waves Made Visible
▪ Meter Calibration at Murray Hill
▪ Capacitors for High-Voltage Pulse Networks
▪ Emergency Installation of TC Radio Equipment in Michigan
Vol. 25, No. 61947-06-012.02 MB▪ Radar Eyes for the Black Widow
▪ Diffusion of Water Through Plastics
▪ Timer for Radar Echoes
▪ A Submarine Cable Carrier for Foreign War Service
▪ Gun Director Mechanism Moves Microscope for Crossbar Switch Measurements
▪ Charging Chokes in Pulse Generating Circuits
▪ Fixed Station Transmitters for Mobile Radio Telephone
Vol. 25, No. 71947-07-011.69 MB▪ A Multiple Output Static Frequency Generator
▪ Pulse Code Modulation
▪ Precision Measurement Made From Projected Negatives
▪ Magnetic Mine Fuse Mechanism
▪ Shunt Tube Control for Thyratron Rectifiers
▪ Research Work in the British General Post Office
Vol. 25, No. 81947-08-011.63 MB▪ Responsibility of Management in the Bell System
▪ FT-241A Frequency Control Unit
▪ Structural Features of GR-S Rubber
▪ New Tandem Transposition
▪ Automatic Carriage Return for Radio Teletypewriters
▪ Rural Telephone Service Agreements
▪ Measuring Creep
Vol. 25, No. 91947-09-011.54 MB▪ A New Miniature Double Triode
▪ Radio Receivers for Mobile Telephone Service
▪ Teletypewriter System for Slow-Speed Submarine Cables
▪ Space Diversity Reception at Super-High Frequencies
▪ New Coin Chute Reduces Wear and Tear
▪ Glass-Sealed Switches and Relays
Vol. 25, No. 101947-10-012.37 MB▪ Piezoelectric Crystal Culture
▪ Carrier Telephones for Farms
▪ Telephotograph Network for the Army Air Force
▪ Early Dreams of Electron Relays
▪ Improvements in D-C Telegraphy
▪ A Telephone Ariadne
▪ A Radio Telephone Transmitter for Auotmobiles
▪ SCR-545-A—A Completely Automatic Tracking Radar
Vol. 25, No. 111947-11-012.58 MB▪ A Preview of Radio Relaying
▪ An Automatic Telegraph Service Monitoring Set
▪ Testing Laboratory at Whippany
▪ The Subscriber Terminal for Rural Power-Line Carrier
▪ A Microwave Generator Arranged to Sweep Through a Range of Several Megacycles
▪ Frequency Calibration of Quartz Crystals
▪ Pulse Code Modulation Demonstrated to I.R.E.
Vol. 25, No. 121947-12-013.52 MB▪ A Microwave Relay System Between New York and Boston
▪ Frequency-Shift Radio Teletype in World War II
▪ Control of Composition of Synthetic Rubber
▪ Historic Firsts: Electronic Voltage Regulator
▪ A Relay Sensitivity Test Set
▪ What Makes Some Crystals Piezoelectric
▪ What's in a Relay?
▪ Lecture Aids
▪ Ceramincs for Electrical Applications
▪ Windingn Micro-Coils
▪ Planning for the Growth of Radio Communications
Vol. 26, No. 11948-01-013.13 MB▪ Power Line Treatment for the M1 Carrier Telephone System
▪ Underground Distribution Wire
▪ Portable Microwave Tower
▪ Telephone Service for Trains
▪ A New Crystal Channel Filter
▪ Historic Firsts: Radio Altimeter
▪ Automatic Switching for Private-Line Teletypewriter Service
▪ Waveguide Hybrids
▪ Models 65 and 66 Hearing Aids
Vol. 26, No. 21948-02-012.62 MB▪ Rural Party-Line Service By Radio
▪ Synthetic Hard Rubber
▪ Carrier Telegraphy in the Bell System
▪ Rapid Wetting Test for Solders
▪ Polyrods
▪ High-Frequency Oscilloscopes for Pulses and Other Transients
▪ A Conductive Unbalance Bridge
▪ M1 Carrier: The Common Terminal
Vol. 26, No. 31948-03-012.56 MB▪ Terminals for the New York-Boston Radio Relay System
▪ Transmission Features of the M1 Carrier System
▪ Teletype Reperforator Transmitter for Automatic Switching Systems
▪ Supermalloy
▪ Emergency Cord for Coaxial Cable
▪ Multivibrator Step-Down by Fractional Ratios
▪ Rubber and the Weather
▪ Wilson Succeeds Gifford as AT&T President
▪ Queen of Gems May Have Rôle in Telephony
Vol. 26, No. 41948-04-012.50 MB▪ Aritifical Dielectric Lenses for Microwaves
▪ Rubber Thermoplastic Jacket for Buried Cable
▪ The Silicon Crystal Detector
▪ Measuring Transmission on Circuits in Use
▪ Slow Acting Relays
▪ High-Speed Teletypewriter Service for the War
▪ Thomas A. Watson Maker of Telephones
▪ Adsorbed Water in Insulation
▪ Electronic Regeneration of Telegraph Signals
Vol. 26, No. 51948-05-012.91 MB▪ Repeaters for the New York-Boston Radio Relay System
▪ A Probe for Testing K Amplifiers
▪ Video-Pair Cable
▪ Electropointed Tungsten Wires
▪ Relay Computer for the Army
▪ Historic Firsts: The Start-Stop Oscillator
▪ Microwave "Telescope" Sweeps Sky Path
▪ Wire Telephone Network for New York State Police
▪ Multi-Frequency Key Pulsing
▪ A Movable-Screen Cathode Ray Tube
▪ EDT and DKT Crystals for Carrier Channel Filters
Vol. 26, No. 61948-06-012.24 MB▪ The Transmission Circuit Simulator
▪ An Adjustable Waveguide Phase Changer
▪ Historic Firsts: Rectifiers as Modulators
▪ Making Energy Talk
▪ Plotting Board for 65-MC Impedance Measurements
▪ Equipment for Measuring Sound Pressures in the Auditory Canal
Vol. 26, No. 71948-07-012.42 MB▪ Repeater Buildings for the First Radio Relay System
▪ Radio Circuits for the Death Valley Area
▪ Historic Firsts: Counting Relays
▪ The "Cloverleaf" Antenna
▪ The 248A Marine Radio Telephone Equipment
▪ Analyzing Relay Characteristics
▪ A High-Precision Test Set Goes to Washington
▪ John Mills 1880-1948
Vol. 26, No. 81948-08-012.17 MB▪ The Transistor
▪ A Distribution Analyzer for Lengths of Impulses
▪ Historic Firsts: The Electrolytic Condenser
▪ A Playback for Visible Speech
▪ The EA Relay
▪ Area Management of Staff Services
Vol. 26, No. 91948-09-012.33 MB▪ New Vacuum Tubes for the Very High Frequencies
▪ A 96-Channel Pulse Code Modulation System
▪ The 81-C-1 Teletypewriter Switching System
▪ A Waveguide Branching Filter
▪ Program Transmission Over a 10,750-Mile Circuit
▪ Program Transmission Over Broadband Carrier Systems
Vol. 26, No. 101948-10-012.16 MB▪ Precision Carbon Resistors
▪ Stereoscopic Drawing of Crystal Structure
▪ High-Frequency Deposited Carbon Resistors
▪ Beam Deflection Tube for Coding in PCM
▪ Test Sets for Dielectric Faults in Coaxial Cable
▪ Historic Firsts: Crystal Controlled Broadcasting
Vol. 26, No. 111948-11-012.03 MB▪ Alpeth Cable Sheath
▪ Historic Firsts: Translation
▪ The License Contract
▪ Atomic Energy
▪ Decoding in PCM
▪ Coaxial Antenna Array for Mobile Service
▪ Joseph P. Davis—Pioneer in Underground Telephone Distribution
▪ Wide Band Crystal Filter for Carrier Program Circuits
Vol. 26, No. 121948-12-012.94 MB▪ Cold-Cathode-Tube Test Set
▪ Germanium Varistors
▪ Companding in PCM
▪ Highway Mobile Radio Systems
▪ Magnetic Field Strength Meter
▪ Noise in PCM Systems
▪ Standard Capacitor
▪ Electronics at Allentown
▪ New Automatic Teletype System for Pan American Airways
▪ Philadelphia-Cleveland Coaxial Opened for Telephone Service
Vol. 27, No. 11949-01-012.47 MB▪ AMA: An Epoch in Telephone Accounting
▪ Fifty Years of Telephone Repeaters
▪ Timing Control for PCM
▪ Now the Telephone
▪ Meter Scales for Transmission Measurements
Vol. 27, No. 21949-02-011.94 MB▪ The V3 Repeater
▪ Bell System Patents and Patent Licensing
▪ Contacts
▪ Splicing Coaxial Connectors
▪ The Goose
▪ The 404A: A Broadband Amplifier Tube
▪ Synchronization for the PCM Receiver
▪ Reginald Lamont Jones, 1886-1949
▪ AT&T Pushes Biggest Expansion Ever Swung by Private Corporation
▪ Nation-Wide Toll Dialing Makes Its Bow
Vol. 27, No. 31949-03-012.06 MB▪ No. 5: The Post-War Crossbar
▪ The Type-A Transistor
▪ Transission Features of the V3 Repeaters
▪ Testing Repeaters with Circulated Pulses
▪ Operating Control of Television Networks
▪ A Typical Move to Murray Hill
▪ Suit Filed to Separate Western Electric from Bell System
Vol. 27, No. 41949-04-012.23 MB▪ The 555 PBX
▪ The Coaxial Transistor
▪ Gas Engine Cooling
▪ A Test Set for Mercury Contact Relays
▪ New Control System Safeguards Service Along Coaxial Route
▪ Oxidation of Organic Materials
▪ Measuring Crystal Inductance at High Frequencies
▪ The K2 Carrier System
▪ Telephone Teams Slug It Out With Ice Storms and Blizzards
▪ Bell System Announces 1949 Television Network Program
▪ Edwin H. Colpitts 1872-1949
Vol. 27, No. 51949-05-011.86 MB▪ The New Look in Telephone Instruments
▪ A Microwave Triode for Radio Relay
▪ Cover Sheet for Technical Memoranda
▪ Mobile Radio Antennas for Railroads
▪ Post-War Growth Equals First 45 Years
▪ Electronic Timing Test Set
▪ Television I-F Coil Design
▪ A Tube Test Set for the L1 Carrier System
Vol. 27, No. 61949-06-012.41 MB▪ Air-Conditioned Electron Tube Laboratory
▪ The B4 Radio Control Terminal
▪ The Sound Measurements Reference Laboratory
▪ Dynamic Impedance of Regulated Power Supplies
▪ Coaxial Attenuation Standards
▪ The Vail Medal
▪ AT&T and Western File Answer to Government Suit
▪ "Looking Ahead With the Bell System"
Vol. 27, No. 71949-07-012.27 MB▪ Mechanical Development of EDT Crystal Units
▪ A 15-KC Carrier Program Channel
▪ John A. Barrett: Pioneer in Telephone Research
▪ The Cover: Inductively Heated Vacuum Furnace
▪ A Harmonic Generator for Audible Ringing
▪ Tunnel Fire Disrupts Communication Circuits
Vol. 27, No. 81949-08-011.14 MB▪ Barium-Titanate Ceramic as an Electromechanical Transducer
▪ The Double-Stream Amplifier
▪ V3 Repeaters at Work
▪ Alarm System for No. 5 Crossbar
▪ A New Frequency Scale for Acoustic Measurements
▪ Helen Keller Visits Murray Hill
Vol. 27, No. 91949-09-011.73 MB▪ Metallizing Paper for Capacitors
▪ Interoffice Transfer of Alarms in No. 5 Crossbar
▪ A Portable Dial for Network Adjustment
▪ The 40AC1 Carrier Telegraph System
▪ Radioactivity Provides New Tool for Laboratories' Chemists
▪ Microwave Propagation Tests
Vol. 27, No. 101949-10-011.69 MB▪ Focusing Sound with Microwave Lenses
▪ The UB Relay
▪ Dr. Shewhart Receives First Impression of Medal in His Honor
▪ Trunking Plan for No. 5 Crossbar
▪ Otto B. Blackwell Retires
Vol. 27, No. 111949-11-012.43 MB▪ A General Purpose Tree Wire
▪ A Crystal Weed
▪ Senders for No. 5 Crossbar
▪ Schooling by Telephone
▪ Transmitting Amplifier for the K2 Carrier System
▪ The 111A Key Equipment for Air Traffic Control
▪ Checking Sense of Cut in Quartz Crystals
Vol. 27, No. 121949-12-012.29 MB▪ Sound Transmission in Solids at Ultrasonic Frequencies
▪ Register and Sender Frames in No. 5 Crossbar
▪ AEC Signs Contract with Western for Sandia
▪ A Voice-Operated Busy Signal
▪ A Completely Electronic Regenerative Telegraph Repeater
▪ Frank Baldwin Jewett, 1879-1949
Vol. 28, No. 11950-01-012.57 MB▪ Vibrating Reed Selectors for Mobile Telephone Systems
▪ Television Network Expansion
▪ The Original Dial Pulse Register Circuit for the Crossbar System No. 5
▪ The Case of the Barnacled Crystal
▪ Murray Hill Auditorium as a Listening Room
▪ Bell Laboratories Served by Western's New Teletypewriter Switching Network
▪ Equipment Features of the Cable Carrier System
Vol. 28, No. 21950-02-012.63 MB▪ A Message from President Leroy A. Wilson to the Members of the Laboratories
▪ An Intergraph for Semi-Curvilinear Coordinate Paper
▪ Combined Key Set for D-C and Multifrequency Key Pulsing
▪ Connectors for the No. 5 Crossbar System
▪ Memorial Service in Tokyo for Dr. Jewett
▪ Optical Measurements of Residual Stresses in Glass Bulbs
▪ A Variable-Frequency Oscillator Stabilized to High Precision
▪ Telephones in the World
▪ Vibrating Reed Signaling for Mobile Radio
▪ Transmission Line Chart
Vol. 28, No. 31950-03-012.46 MB▪ The Laboratories in Monmouth County
▪ Incoming Register Circuits for No. 5 Crossbar
▪ An Impulse Generator for Lightning Studies
▪ Multifrequency Power Supply for Reed Signaling
▪ Incoming Register Link for No. 5 Crossbar
▪ Historic Firsts: Radio Astronomy
▪ Coaxial's New Alarm and Control System
▪ The March to Higher Frequencies
Vol. 28, No. 41950-04-012.75 MB▪ The 81-C-1 Teletypewriter Switching System
▪ Multiple Close-Spaced Channels for Mobile Radio
▪ Ten Years' Service Justifies Designers' Confidence
▪ Line-of-Sight Relay Systems—Old and New
▪ Fine-Wire Type Vacuum Tube Grids
▪ Ringing Selection in No. 5 Crossbar
Vol. 28, No. 51950-05-012.46 MB▪ Error Detecting and Correcting Codes
▪ Automatic Feed for String Saws
▪ Operator Connections in No. 5 Crossbar
▪ A New Duct-Type Bay for Toll Transmission Equipment
▪ Mu-Beta Effect Chart for Feedback
▪ Extension Flashlight
▪ A Tuned Plate Multivibrator
▪ Crystal-Controlled Clock
▪ Trouble Recording for the No. 5 Crossbar System
▪ Historic Firsts: Far-End Crosstalk Balancing
▪ The Phototransistor
Vol. 28, No. 61950-06-012.88 MB▪ Modified Tape Armor and Lepeth Sheath Cable
▪ Design Patterns for No. 5 Crossbar
▪ Radioactive Isotopes in Timber Preservation Studies
▪ Historic Firsts: Sun Spots and Radio
▪ Improvements in Crystal Units for Precise Frequency Control
▪ An Electrical Analog of the Inner Ear
▪ Sender Link Frames for No. 5 Crossbar
▪ Electron Tube Research Laboratory at Murray Hill
▪ The Cathode Ray Sound Spectroscope
▪ Submarine Cable Links Key West-Havana
Vol. 28, No. 71950-07-013.29 MB▪ Plastic Covers for Switchboard Cable
▪ Insulation by Cataphoresis
▪ Sealing Solder
▪ Number Group Frame for No. 5 Crossbar
▪ Photographing Sound Waves
▪ Machine for Winding Helices on Ceramics
▪ Phase Measurements for L Carrier Components
▪ Maintenance Facilities for the No. 5 Crossbar System
▪ Bell System Important to Air Defense
Vol. 28, No. 81950-08-012.52 MB▪ The Phototransistor
▪ The Automatic Monitor
▪ Sampling a Sound in an Ear
▪ Termintes and Their Control in Telephone Poles
▪ Automatic Frequency Control for Heterodyne Measurements
▪ Telephone Service for the Pentagon Building
▪ Trunk Selection by No. 5 Crossbar Markers
▪ A Summer's Work on the Desert
Vol. 28, No. 91950-09-012.86 MB▪ The First Quarter-Century
▪ Angus S. Hibbard—Pioneer Telephone Executive and Inventor
▪ Three-Dimensional Traffic Chart
▪ Equipment Arrangements for No. 5 Crossbar Markers
▪ Automatic Teletypewriter Switching System for Ford
▪ Background Noise in Transistors
▪ New Impedance Bridge Measures Small Resistance Increments
▪ Message Register Operation in No. 5 Crossbar
▪ Thunder in the South
Vol. 28, No. 101950-10-012.39 MB▪ Conductivity Measurements at Microwave Frequencies
▪ A Cathod-Ray Rapid-Record Oscillograph
▪ The TD-2 Radio Relay System
▪ Borocarbon Resistors
▪ Tantalum Electrolytic Capacitors
▪ Who Owns the AT&T?
▪ Maxwell Bridge for Measuring Loading Coils
▪ Three-Bay Cabinet for Laboratory and Shop
▪ Bell System Rates for TV Network Service
▪ Permanent Signals in No. 5 Crossbar
▪ Tells of Use of Laboratories Gun Director
Vol. 28, No. 111950-11-012.66 MB▪ A Network to Represent the Inner Ear
▪ Walter S. Gifford Named Ambassador
▪ A Precise Decade Oscillator
▪ Register and Sender Testing in No. 5 Crossbar
▪ Stock Expansion Voted
▪ Recent Improvements in the Telephone Clock
▪ Portable Public Address System for Lectures
▪ Optimum Coaxial Lines
▪ Traveling Wave Tubes
▪ No. 5 Crossbar Marker
▪ Business Is a Good Neighbor, Too
▪ Fire Brigade Refresher Course at Murray Hill
Vol. 28, No. 121950-12-013.25 MB▪ A Novel Accelerometer
▪ Pulse Conversion in No. 5 Crossbar
▪ Making Unseen Stresses Visable
▪ N-1 Carrier System Goes Into Service
▪ Automatic Transmission Measuring Set
▪ The New 482A Patching Jack
▪ Bell System Prepared for National Emergency
▪ Traffic Registers for No. 5 Crossbar
▪ A Video Monitoring Probe
▪ An Electrical Vocal System
Vol. 29, No. 11951-01-013.14 MB▪ Splice Loading Developments
▪ Difficulties of Diagramming the Ear
▪ Traffic Distribution in the No. 5 Crossbar Marker
▪ Detecting Momentary Failures in Capacitors
▪ Amplification at 6-millimeter Wavelength
▪ An Improved Vacuum Fusion Furnace
▪ The LD-B1 Branching Amplifier
▪ Electrons and Holes in Semiconductors
Vol. 29, No. 21951-02-012.99 MB▪ Military Flight Service Network
▪ Metallized Paper Capacitors
▪ Historic Firsts: The Retardation of a Moving Clock
▪ No. 5 Crossbar AMA Translator
▪ Test Amplifier for Coaxial Systems
▪ 426A Electron Tube
▪ Laboratories Develop Mechanism for Ten-Cent Calls
Vol. 29, No. 31951-03-012.61 MB▪ An Improved Telephone Battery
▪ The General Purpose Analog Computer
▪ Problem Solving with the Analog Computer
▪ W-R-J-M
▪ A Microwave Noise Source
▪ The Telephone 75 Years Ago
Vol. 29, No. 41951-04-012.70 MB▪ The New Key West-Havana Telephone Cable
▪ Pulse Testing of Coaxial Cables
▪ Miniature Four-Wire Terminating Set
▪ New Types of Cable Terminals
▪ Waveguide Filters for Pulse Transmission Studies
▪ 425A Electron Tube
▪ The LD-R1 Single Sideband Radio Receiver
▪ Military Electronics Develops New Radar Fire-Control System
▪ What Becomes of the Operators?
Vol. 29, No. 51951-05-012.89 MB▪ Problems in Nationwide Dialing
▪ Ferrites: New Magnetic Materials for Communication Engineering
▪ Experimental Preparation of Ferrites
▪ Pulse Code Modulation for Television
▪ A 50-kc to 3.5-mc Hererodyne Oscillator
▪ Pulse Generation and Shaping at Microwave Frequencies
▪ Ohio Bell Offers Answering Service
▪ Defense Projects in the Laboratories
▪ Telecommunication in Great Britain
Vol. 29, No. 61951-06-013.26 MB▪ Assembling the Submarine Cable Amplifier
▪ Lepeth Cable Splicing
▪ Automatic Calibration of Film Scales for Oscillators
▪ New Transmitter Tester
▪ Zinc Plating Grows a Beard
▪ How Your Telephone Service Grows
▪ Transmission Measuring System
Vol. 29, No. 71951-07-013.42 MB▪ The Switching Systems Laboratories
▪ Computer For Guided Missiles
▪ Mechanically Wrapped Connections
▪ Diesel Engine Sets for Radio Relay
▪ The Radar Range Calculator
▪ Terminals for the TD-2 Radio Relay System
▪ Historic Firsts: Radio-Controlled Airplane
▪ Single-Frequency Signaling System
▪ The Key West-Havana Cable: The Repeater Container
Vol. 29, No. 81951-08-012.97 MB▪ Stalpeth Cable Sheath
▪ Repeaters for the TD-2 Radio Relay System
▪ Sound for an Assembly Room
▪ Subscriber Long-Distance Dialing
▪ Laying the New Key West-Havana Submarine Cable System
▪ Western Electric 5755/420A Electron Tube
▪ The 6A Order Turret
▪ Improving Corona Voltage of Coaxial Cables
▪ The Junction Transistor
Vol. 29, No. 91951-09-013.25 MB▪ Automatic Message Accounting
▪ Induction Heater Control System
▪ Leaf Spring Vibration Machine
▪ 500 Type Telephone Set
▪ Laboratories' People Away From Home—Point Breeze
▪ No. 5 Crossbar Frames
▪ Coast-To-Coast Radio Relay System Opens
▪ Telephone People Battle the Greatest Flood in the Nation's History
Vol. 29, No. 101951-10-013.17 MB▪ The Key West-Havana Cable: An Electron Tube for Subarine Repeaters
▪ A Degreaser for Small Parts
▪ Basic AMA Central Office Features
▪ A Bible of Early Electrical Literature
▪ The 740-E PBX
▪ It Has an Eye for Lines
▪ Bell of Canada to Provide TV Network
▪ Improved U, UA, and Y Type Relays
▪ A New PBX For Small Business Offices
▪ New Ringer for 500-Type Telephone Set
Vol. 29, No. 111951-11-013.39 MB▪ Plastic Guards for Aerial Wire
▪ Vocal Gestures
▪ The AMA Tape Perforator
▪ A Transmission Package for the 500 Telephone Set
▪ Cellulose Acetate Filled Coils
▪ Laboratories' People Away From Home: Kearny
▪ Transistor Symposium at Murray Hill
Vol. 29, No. 121951-12-012.76 MB▪ Automatic Adjusting Macine for C-Type Ringers
▪ The Cold Cathode Glow Discharge Tube
▪ Exploring Hidden Factors in Speech
▪ Local Wire Video Television Networks
▪ The LD-T2 Radio Transmitter
▪ Recording on AMA Tape in Central Offices
▪ Englewood Begins Long Distance Customer Dialing
Vol. 30, No. 11952-01-013.27 MB▪ Signal Translation in Hearing
▪ Shock Testing of Vitrified Clay Conduit
▪ Code Patterns in Telephone Switching and Accounting Systems
▪ Historic Firsts: Lettered Dial
▪ A New Stepping Relay
▪ Broadcast Pick-Up Telephone
▪ The 101-G Power Supply
▪ The Key West-Havana Cable: Electrical Characteristics of Repeaters and Terminals
▪ Mr. Craig Talks at the Laboratories
Vol. 30, No. 21952-02-013.21 MB▪ Antennas for the TD-2
▪ The E1 Telephone Repeater
▪ The Key West-Havana Cable: Repeater Components
▪ The Mass Spectrometer
▪ Bell System to Try Aluminum Wire If Metal Can Be Obtained
▪ Basic Features of the AMA Center
Vol. 30, No. 31952-03-013.27 MB▪ Electron Metallography
▪ A "Packaged" Dial Office for Small Communities
▪ Screw Threads: The Development of Standards
▪ The Key West-Havana Cable: Transmission Aspects
▪ Power Plants for the TD-2 Radio Relay System
▪ The AMA Timer
▪ Laboratories People Away From Home: Field Engineering Force
Vol. 30, No. 41952-04-013.17 MB▪ TD-2 Radio Switching and Monitoring Equipment
▪ Cable Sheath Repairs
▪ The 108A Protector
▪ Key West-Havana Cable: The Power Plant
▪ New Longitudinal Tape Shield for Video Pair Cable
▪ Central Office Equipment for AMA
▪ New TV Facilities Planned
▪ Twenty-Five Years of Television Transmission
▪ Laboratories Develops Army Telephone Set
Vol. 30, No. 51952-05-011.59 MB▪ The 507A and 507B PBX
▪ New Word Counter for Teletypewriter Circuits
▪ Dial for 500 Type Telephone Set
▪ First Southern Radio-Relay Link
▪ The Record Expands its Technical Coverage
▪ The Key West- Havana Cable: Regulated DC Power Supply
▪ An Improved Shadowgraph
▪ The AMA Assembler
▪ A Multiple Exposure Camera
Vol. 30, No. 61952-06-012.14 MB▪ The AMA Reader
▪ TransmissioN Beyond the Horizon at Frequencies Between 40 and 4000 Mc
▪ A Recording Fluxmeter of High Accuracy and Sensitivity
▪ Centralized Automatic Message Accounting
▪ Telephone Service for Carrizo Plain Area of California
▪ Type-O Carrier System Goes Into Service
▪ Optical Microscopy: An Adjunct to Engineering and Research
▪ A New General Purpose Relay
▪ Spot Heat for Splicers
▪ Birth of the Loading Coil
▪ Telephone Service for Train Passengers
▪ The Sun in June
▪ Matter of Small Weight
Vol. 30, No. 71952-07-011.71 MB▪ Type-N Carrier Telephone System
▪ Electron Microscope Study of Sintering in Thermistor Flakes
▪ An Early Demonstration of Color Television
▪ The AMA Computer
▪ JKT—An All-Purpose Station Wire
▪ The Sorter for Automatic Message Accounting
▪ Loads of Pull
Vol. 30, No. 81952-08-011.61 MB▪ Improving the Service Life of Storage Batteries
▪ Handset for the 500-Type Set
▪ The AMA Summarizer
▪ Radio Relay Stations of the TD-2
▪ Cable Transmission Characteristics for the N Carrier System
▪ Improvements in Subscriber Line Testing
Vol. 30, No. 91952-09-011.88 MB▪ Vibralloy—A New Ferromagnetic Alloy
▪ Test Tapes for Automatic Accounting Centers
▪ AT&T Chief Engineer Retires
▪ Solid Sound
▪ Finding Gas Leaks in Cable Sheaths
▪ Recorded Announcement of Toll Line Delays
▪ The AMA Printer
▪ Oliver E. Buckley Retires
Vol. 30, No. 101952-10-011.82 MB▪ The Channel Unit of the N1 Carrier
▪ Magnetic Domains
▪ Extreme Cold Opens Way to New Knowledge
▪ Test Unit for AMA Perforators and Readers
▪ Communications Development Training Program
Vol. 30, No. 111952-11-011.33 MB▪ Spatial Harmonic Traveling-Wave Amplifier
▪ Craft Milling
▪ Magnetic Tape Editor
▪ Tracking Time Backward in AMA
▪ Handling Coin Calls in No. 5 Crossbar
▪ High Stability 100-Kc Crystal Units for Frequency Standards
▪ Transistors Enter Telephone Service
▪ An Automatic Dial Pulse Recorder
▪ Radio-Relay Route Planned for the Middle West
Vol. 30, No. 121952-12-011.85 MB▪ Line Insulation Testing
▪ Cable Dance Damper
▪ New Microwave Route—Kansas City and St. Louis
▪ Recovery and Repair of Telephone Apparatus
▪ High-Speed Machine for Fatigue Studies
▪ Sequence Signaling
▪ 1953 Toll Construction Program
▪ New Putty Keeps in Radio Waves
▪ Accuracy Provisions in AMA
▪ Research in a Saucepan
▪ Alarm and Control Features of the TD-2
▪ For Doing Two Things at Once
▪ A Story About the Christmas Tree—and the Telephone Relay
Vol. 31, No. 11953-01-015.70 MB▪ Systems Engineering in Bell Telephone Laboratories
▪ "B" Lineman's Wrench
▪ Test Set for the M1 Carrier System
▪ A Carrier-Level Adjuster for M1 Carrier Terminals
▪ Dial-Tone and Completing Markers for No. 5 Crossbar
▪ The Howling Telephone
▪ Early Work on Dial Telephone Systems
▪ Reserve Power Generators for Unattended Stations
▪ New York Company to Extend Toll Dialing in Suburbs
▪ New L3 Carrier System Placed on Field Trial
▪ Kansas City-St. Louis Radio Relay System
Vol. 31, No. 21953-02-015.29 MB▪ Customer Toll Dialing at Englewood
▪ York, Pa., and Atlantic City Added to Television Network
▪ The N1 Carrier Oscillators
▪ Automatic Digit Recognizer
▪ Additions to Nation-Wide Radio Relay Networks
▪ The AMA Computer: Chargeable Time and Message Unit Computations
▪ Telephone Statistics
▪ Direct Reading Inductance Bridge for Frequencies Up to 5 Mc
▪ Switching Systems as Mechanized Brains
▪ Bombardment Conductivity
▪ Bell System Report for 1952
Vol. 31, No. 31953-03-011.87 MB▪ Performance Studies of AMA Readers and Perforators
▪ New Eight-Party Service for Panel and No. 1 Crossbar
▪ The Early Years of the Strowger System
▪ Improved Contact Flanges for Waveguides
▪ Submarine Telephone Cable for Air Force
▪ Oven Control with Thermistors
Vol. 31, No. 41953-04-011.89 MB▪ Paramagnetic Resonance Absorption in Organic Free Radicals
▪ Cold Cathode Counting Tube
▪ Magnetic Adjustment of Receivers for the 500 Type Telephone Set
▪ Tiny Transistor Repeater
▪ A Signaling Circuit for N1 Carrier
▪ Relay Vibration Studies
▪ Historic Firsts: Single-Sideband Transmission
▪ A Substitute Method for Dead-Ending Line Wire
▪ Relay Computer For Network Analysis
▪ Station Installer's Tool Case
Vol. 31, No. 51953-05-012.20 MB▪ The No. 23 Auxiliary Operating Room Desk
▪ The No. 23 Auxiliary Operating Room Desk: Circuit Arrangements
▪ Ultrasonic Waves Measure the Elastic Properties of Polymers
▪ Adjustable High Q Inductor for Type-O Carrier
▪ Teletypesetter Equipment in the Bell System
▪ Test Equipment for the TD-2
▪ Automatic Teletype System
Vol. 31, No. 61953-06-012.05 MB▪ Measuring Changes in Length to One Part in a Million
▪ Precise High-Frequency Crystal Units
▪ Measuring the Pull of Relays
▪ Measuring the Load-Displacement in Relays
▪ Wood Stumulates Its Own Destroyer
▪ Switchboards for the Blind
▪ Teletypewriter Word Counter
▪ Heat Dissipation from Toll Transmission Equipment
▪ At the National Academy of Sciences
▪ Fifth Anniversary of Network TV
▪ Robot Secretary
▪ Recorded Stock Quotations
Vol. 31, No. 71953-07-012.14 MB▪ Growing Quartz Crystals
▪ A New Test Chamber at Murray Hill
▪ N1 Carrier: System Equalization and Regulation
▪ Color Television Tests
▪ An Experimental Delay Distortion Scanner
▪ More Long Lines Services
▪ A New Teletypewriter
▪ The AMA Called-Office Name Translator
▪ Fifth Anniversary of Transistor Announcement
Vol. 31, No. 81953-08-012.29 MB▪ Bakcward-Wave Oscillator
▪ A Hairpin Tube Backward-Wave Oscillator
▪ A Speech Volume Survey on Telephone Message Circuits
▪ Guy Anchors
▪ New Teletypewriter System for Federal Reserve
▪ Adjustable Inductors
▪ A Polarized Relay of Simple Construction
▪ N1 Carrier: Packaging of Equipment
▪ Crystals That Remember
Vol. 31, No. 91953-09-012.51 MB▪ Bleeding Temperatures of Creosoted Poles
▪ Information Theory
▪ A Tape-To-Card Converter for Automatic Message Accounting
▪ Historic Firsts: Volume Indicator
▪ Coin Collector Telephone Equipment for Trains
▪ Additions to TV Network
▪ Plane Tickets by Mobile Telephone
▪ N1 Carrier: Repeaters and Group Units
▪ The 3A Timer
▪ Addition to Teletypewriter Network
▪ Improved Time-of-Day Facilities for New York City
▪ Tiny Electronic Switch
▪ Transformer Coils Wound Without Wire
▪ The 4A Toll System Grows
▪ Type-N Carrier Program Service
▪ Electrocardiograms bby Wire
Vol. 31, No. 101953-10-012.67 MB▪ The 4A Crossbar Toll System for Nationwide Dialing
▪ Color Control in the Bell System
▪ Auroras—What They Mean to Us
▪ The Cushion Body Belt
▪ The New Message Register
▪ Air Traffic Control System Studies
▪ Largest Business PBX Installed
▪ A New General Purpose Polarized Relay
▪ Pole Mounted N1 Carrier Repeaters
▪ New Interrupter for No. 5 Crossbar
▪ Three-in-one Machine for Making Telephone Cords
▪ Communications at the New Network Airport Terminal
▪ Tinning A Million Miles of Wire
Vol. 31, No. 111953-11-013.09 MB▪ New Wire Spring General Purpose Relay
▪ Office of Naval Research Honrs the Laboratories
▪ Analysis of Materials
▪ Network TV Stations Pass 200
▪ The New Splendor of Switching
▪ The New Telephone Answering Set
▪ Outdoor Exposure Tests at Miami
▪ A New Service Observing Desk
▪ The Compandor in N1 Carrier
▪ Customer Long-Distance Dialing
▪ Communications at U.N. Headquarters
▪ Medical Devices Used in Telephone Manufacturing
▪ Network Color TV Planned
Vol. 31, No. 121953-12-012.50 MB▪ Aluminum Conductors in Telephone Cable
▪ Qualitative Spectrochemical Analysis
▪ Thunderhunting
▪ Common-Control Features in Nationwide Dialing
▪ Pulse-Testing TD-2 Antennas
▪ Sequence Charts for Switching Circuits
▪ TWA Installs New Teletype System
▪ A New Crystal Unit for Broadband Carrier Systems
▪ N1 Carrier—Selection of Varistors for Use in Compandors
▪ Telephones Aid Pipeline Installation
▪ CAMA Placed in Service
▪ Long Lines in Color TV Tests
Vol. 32, No. 11954-01-012.83 MB▪ The L3 Coaxial Carrier System
▪ Inventing and Patenting at Bell Laboratories
▪ The Englewood Story
▪ Color Timing System for Filter Centers
▪ "Nerve-Type" Transmission Line
▪ Testing Telephone Usefulness
▪ Continuously Recorded Relay Measurements
▪ Transatlantic Telephone Cable to Become a Reality
▪ President Eisenhower Receives the 50-Millionth Telephone
Vol. 32, No. 21954-02-012.94 MB▪ Solderless Wrapped Connections
▪ Making Tubes for Research
▪ Automatic Alternate Routing of Telephone Traffic
▪ World Telephones Total 84 Million
▪ Dr. Kelly Discusses "The Contributions of Industrial Research to National Security"
▪ Bells and Lights for Civil Defense
▪ A New Single-Frequency Signaling System
▪ Governors for Dials
▪ Nike Added to Nation's Defense Arsenal
Vol. 32, No. 31954-03-012.70 MB▪ Television and the Bell System
▪ Spectrophotomertric Analysis
▪ Emergency Transfer for Essential Services
▪ Telephone Set for Hazardous Areas
▪ A Shock Tester for Small Apparatus
▪ Locating Conductor Faults with Sound "Whistler"
▪ Closed Loop TV for New York Police
▪ Wire Line Entrance Links for TD-2
▪ Wire Abrasion Tester
▪ Highlights from the AT&T Annual Report
▪ Western Electric Has Record Year
▪ Aluminum Outdoor Telephone Booth
Vol. 32, No. 41954-04-013.02 MB▪ A New Type Open-Wire Line for Rural Areas
▪ A Digital Code Wheel
▪ Card-Punching Over Telephone Lines
▪ New Gas Flow Indicator
▪ New Use for Toothpicks
▪ A Mechanical Traveling-Wave Oscillator
▪ Amplifiers for the L3 Coaxial System
▪ Aluminum Die-Castings for N1 Carrier
▪ Electronic Test Set for Signaling Systems
▪ No. 5 Crossbar Opens the Door to Nationwide Customer Dialing
▪ New 12-Channel Bank for Broadband Carrier
▪ Transistorized Rural Carrier Trial Starts
Vol. 32, No. 51954-05-012.94 MB▪ Preference Research
▪ Rural Distribution Wire
▪ Precision Potentiometers for Analog Computers
▪ Dr. Kelly Surveys Military and Civilian Uses of Atomic Power at Centennial Science Forum
▪ Cast Resin Terminal Strips
▪ Mechanical Problems of Electron Tubes for L3 Carrier
▪ Ladders and Fungi
▪ New York-Chicago L3 System
▪ No. 5 Crossbar—Marker and Trasverter Testing
▪ Improved Radio Relay for Southern States
Vol. 32, No. 61954-06-012.95 MB▪ A Foreword on Transistors
▪ P-N Junctions and the Junction Transistor
▪ Dr. Kelly Receives Industrial Research Institute Medal for 1954
▪ Type-O Carrier: System Objectives
▪ Type-O Carrier: System Description
▪ A New Multifrequency Receiver
▪ Contact Phenomena in Sealed Containers
▪ Measuring Overhead Wire Clearances
▪ The Bell Solar Battery
▪ New Telephone with Illuminated Dial
▪ The 1954 Share Owners' Meeting
▪ Submarine Cable for Air Force
▪ 300 TV Stations in Network
Vol. 32, No. 71954-07-012.49 MB▪ Centralized Automatic Message Accounting
▪ Dr. Kelly Gives Schwab Lecture Before American Iron and Steel Institute
▪ Quality Control and the L3 System
▪ Continuous Scanner for Television Film
▪ Cold-Resin Gas Dams for Telephone Cables
▪ Detached Contact Schematics
▪ No. 5 Crossbar Tandem Revertive-Pulse Incoming Register
▪ Order Wire and Alarm Facilities for Type-N Carrier
▪ Panel System Maintenance
Vol. 32, No. 81954-08-012.66 MB▪ Echo and its Effects on the Telephone User
▪ Semiconductors: Characteristics and Devices
▪ Telephone Poles End 25-Year Test in Colorado
▪ Precision Transformers for the L3 System
▪ Senders for the 4A Toll System
▪ Varistor Measuring Techniques
▪ New Super-Speed Teletypewriter Placed in Service
▪ Regulated-Frequency Power Supply for Time-of-Day Machine
▪ Automatic Progression Trunk-Test Circuit
Vol. 32, No. 91954-09-012.69 MB▪ Electronic Computers and Telephone Switching
▪ Measuring Telephone Traffic
▪ A New Sound Integrator
▪ Improved Silicon Carbide Varistors
▪ Type-O Channel Circuits
▪ A Noise-Figure Test Set for the TD-2 Radio System
▪ Slow Release Wire-Spring Relay
▪ An Improved Splicer's Test Point
▪ Submarine Telephone Cable to Alaska Planned
Vol. 32, No. 101954-10-012.58 MB▪ DIAD—An Experimental Telephone Office
▪ A Universal Telephone Ringer
▪ Centralized AMA Switchboard
▪ New Techniques for Measuring Forces and Wear
▪ Dr. Kelly Warns of Urgent Need for Complete Continental Air Defense System
▪ 70-Megacycle IF Pads
▪ Open-Wire Swing Test
▪ New Ultra-High Frequency Transistor Developed at the Laboratories
▪ Regulation of the L3 Coaxial System
▪ The 100-Pen Recorder
▪ Color Television Now Available to 65 Cities
▪ Line Insulation Test Circuit
Vol. 32, No. 111954-11-012.83 MB▪ Redundancy in Television
▪ A New Cable Splice Closure
▪ Radio Programs on N1 Carrier
▪ First Transatlantic Telephone Cable Scheduled to Start Operation in 1956
▪ Metals with Whiskers
▪ Improved Design of B-Type Relay
▪ Growth of TD-2 Radio Relay
▪ A Comparator for Precise Transfer Conductance Measurements
▪ Decoders and Markers in 4A Toll Crossbar
▪ Increased Efficiency Obtained with Bell Solar Battery
▪ Manufacturing a Transistor
▪ New Telephone Set for the Hard of Hearing
▪ Over-the-Horizon Radio System
▪ New Radio Relay Antenna
Vol. 32, No. 121954-12-012.60 MB▪ Switching at Its Boldest
▪ Casting and Potting Resins: Some Chemical Aspects
▪ Miniturized Transmission Transformers
▪ Microwave Testing with Millimicrosecond Pulses
▪ A Long-Lived Packaged Amplifier for Aircraft
▪ A New Intertoll Trunk-Testing Circuit
▪ Code Translation in No. 5 Crossbar
▪ Polyethylene Cable Guard
▪ George A. Campbell 1870-1954
▪ First L3 System Television Transmission
Vol. 33, No. 11955-01-012.40 MB▪ Ultra-High Vacua
▪ The Condenser Microphone as an Acoustic Standard
▪ Telegraph Transmission Coefficients
▪ Molds Assist the Preservative Treatment of Poles
▪ A Precision 30-Mc Admittance Bridge
▪ Repeaters and Group Circuits in Type-O Carrier
▪ New Highways for Long Distance Traffic
▪ Intertoll Features of No. 5 Crossbar
▪ A New Frequency Analyzer
Vol. 33, No. 21955-02-012.29 MB▪ Single-Crystal Germanium
▪ The Type-O1 Transposition System
▪ Spring-Type Micro-Balance
▪ Foreign Area Translation in No. 5 Crossbar
▪ Connectors for Cable Shields
▪ Automatic Relay-Adjusting Circuit
▪ Connectors in 4A Toll Crossbar
▪ Drop Wire Clamp Testing Machine
▪ Carrier Terminals for the L3 System
▪ Significant Advances in Communications Marked 1954
Vol. 33, No. 31955-03-012.85 MB▪ Minplas—Miniature Apparatus in Plastic
▪ Electronic Conductors
▪ A Research Study of Germanium Conductivity
▪ Operation of the Card Translator
▪ Bell System Participation in ASTM Pole Research
▪ Service Features of the No. 2 Telegraph Serviceboard
▪ Dislocations in Germanium Crystals
▪ New Machine for Transistor Assembly
▪ Type-O Carrier—Terminal Alarm Circuits
▪ New Long-Distance "Helical" Waveguide
▪ Highlights from the AT&T Annual Report
▪ New Military Telephone System
▪ Plans Filed for Microwave Link with Transatlantic Telephone Cable
Vol. 33, No. 41955-04-012.57 MB▪ Junction Tetrode Transistor
▪ Traffic Engineering in Bell Telephone Laboratories
▪ A Short-Haul Microwave Transmitter
▪ A New High-Speed Recording System
▪ Filters for Type-O Carrier
▪ Automatic Alternate Routing in the 4A Crossbar System
▪ High-Voltage Problems in the L3 System
▪ Off-The-Air Pickup Arrangement Proposed by Long Lines Department
▪ Traffic Registration in 4A Toll Crossbar
▪ Stability Evaluation of Switching Apparatus
▪ New Transistor Computer Developed for the Air Force
▪ Western Electric Year-End Report for 1954
▪ Western Electric to be Prime Contractor on "DEW" Lines
Vol. 33, No. 51955-05-012.52 MB▪ Prelashing Aerial Telephone Cable
▪ Efficiency of Bell Solar Battery Almost Doubled
▪ The Field-Effect Transistor
▪ Reflex Klystrons for Microwave Radio Relay Systems
▪ Card Translator Equipment
▪ Repeaters in the L3 Coaxial System
▪ Converting Toll Crossbar Offices for Nationwide Dialing
▪ CAMA—Position Link Circuit
▪ Over-the-Horizon Microwave Transmission
Vol. 33, No. 61955-06-012.44 MB▪ Zone-Melting
▪ Analysis of No. 5 Crossbar Trouble Recorder Cards
▪ Dr. Kelly Recommends Graduate Training in Creative Technology for Engineers
▪ Safer Testing Aids
▪ Transistors in the 4A Crossbar System
▪ Power Supply for the L3 System
▪ CAMA—Crossbar Tandem PCI Sender
▪ Semiconductor Diodes
▪ Teletypewriter Billing of Special Toll Calls
▪ The 1955 AT&T Share Owners Meetings
Vol. 33, No. 71955-07-012.59 MB▪ The Bell Solar Battery
▪ A Miniature Transistor Amplifier
▪ Outside Plant Field Trials
▪ Traffic Load Control in Toll Crossbar Systems
▪ Electrical Contacts for Transistors and Diodes
▪ Military Radio Control Terminal
▪ Servicing Center for Short-Haul Carrier
▪ CAMA: Transverter and Billing Indexer
▪ Broadband Test Oscillator for the L3 Coaxial Carrier System
▪ New Military Carrier Telephone System
Vol. 33, No. 81955-08-012.28 MB▪ The Combination Wire-Wrapping Tool
▪ Strength of Small Metal Specimens
▪ A Military Communication Network Using Wire and Radio
▪ The Translator Card in Toll Crossbar
▪ Atlantic Telephone Cable Laying Started
▪ Improved Testing Instructions for Type-O Carrier
▪ New Silicon Power Rectifier Announced
▪ New Supervisory Control System
▪ Semiconductors—Resistivity and Lifetime Measurements
▪ CAMA—Sender Test Circuit
▪ Army Holds Press Show at Nike Installation
Vol. 33, No. 91955-09-012.26 MB▪ Automatic Private-Line Teletypewriter Switching System
▪ Purification of Silicon
▪ Intercepting with Recorded Announcements
▪ Ferroelectric Storage Devices
▪ Molded Plastic Jack Mountings and Terminals
▪ Junction Transistors and Diodes for Power Regulation
▪ Measuring Relative Phase Shift at VHF
▪ A PBX Allotter for No. 5 Crossbar
▪ Sealed Switch Relays for AMA
▪ Landing Site Selected for Alaska Underwater Telephone Cable
▪ Telephone Cable Planned to Link Hawaii to Mainland
▪ Emergency Reporting System Developed at Laboratories
Vol. 33, No. 101955-10-012.38 MB▪ The New Volume Control Telephone
▪ "Time of Day" Goes Magnetic
▪ Emergency Radio Telephone System
▪ Precision Ceramics
▪ Improvements in Wiper Springs for Step-by-Step Switches
▪ Grown Junction Transistor Development
▪ Overload Control in No. 5 Crossbar
▪ New Military VHF-UHF Radio Set
▪ Ferrite Isolators at 11,000 Megacycles
▪ Equalization in the L3 System
▪ "Two-Train" Switching in Toll Crossbar Offices
▪ Automatic Wiring Machine Announced
Vol. 33, No. 111955-11-012.25 MB▪ Broadband Horn Reflector Antenna
▪ The Inner Structure of Alnico 5
▪ Code Conversion in No. 5 Crossbar
▪ First Transoceanic Telephone Cable Spans the Atlantic
▪ Program Switching in TD-2 Radio Relay
▪ Gyro Model of Electron Behavior in Ferrites
▪ Circuit Features of the No. 2 Telegraph Serviceboard
▪ AN/TRC-24 Radio Transmitter
▪ Bell Solar Battery in Experimental Service
▪ Bankers "Visit" Murray Hill Via TV
Vol. 33, No. 121955-12-012.42 MB▪ Miniature Metallized Lacquer-Film Capacitors
▪ Junction Phototransistors
▪ Coaxial Patch Plugs for TD-2 Radio
▪ Differential Thermal Analysis
▪ Precise Temperature Measurements on Bleeding Poles
▪ Why Storage Batteries?
▪ Space Diversity Arrangement for Radio Teletypewriters
▪ Radio Set AN/TRC-24: Antenna
▪ Adjustable Equalizers for the L3 Coaxial System
▪ Splicers and Pads for Coaxial and Balanced-Pair Cables
▪ In Memoriam—Alva B. Clark
Vol. 34, No. 11956-01-012.26 MB▪ Organic Corrosion
▪ Recorded Dictation Using PBX Extension Telephones
▪ Alloyed-Junction Transistor Development
▪ Pulse Equipment for Microwave Antenna Tests
▪ E-Repeater Test Set
▪ New Military Carrier Telephone Systems
▪ Magnetic Test for Relay Cores
▪ A New EA Type Relay
▪ Harmonic Generators for Telephone Tones
▪ Dr. Kelly Sees Bright Future for Communications
▪ Continued Advanced by Bell System in 1955
▪ "Wide-Screen" Antenna for the Air Force
Vol. 34, No. 21956-02-012.35 MB▪ "Over-the-Horizon" Radio Tests
▪ The General Analytical Laboratory
▪ Miniature FM Transistor Transmitter
▪ Pole-Mounted Repeaters and Reserve Power Supplies
▪ Electron Ejection from Metals by Ions
▪ A Capacitor Scanner for Signal Generation
▪ AN/TRC-24 Radio Set: Receiver
▪ New Universal Ringing Power Plant
▪ New Transistor Technology Announced by Laboratories
▪ Bell System Television Networks Extended
Vol. 34, No. 31956-03-012.36 MB▪ Speech Bandwidth Compression
▪ Direct Dispatching for Mobile Telephones
▪ Micromanipulators
▪ Crushing of Buried Cable by "Cold" Lightning
▪ Automatic Protection Switching for TD-2 Radio
▪ Improving Mobile Radio System on New York Thruway
▪ Vibration and Electron Tube Reliability
▪ N and K Carrier Systems in the Same Cables
▪ Ralph Bown Completes Distinguished Bell Laboratories Career
▪ Highlights from the AT&T Annual Report
▪ Tone RInger May Replace Telephone Bell
▪ New Contacts for Wire-Spring Relay
Vol. 34, No. 41956-04-012.21 MB▪ G.A.S.H.—A Ferroelectric Crystal
▪ The A2A Video Transmission System
▪ Answer-Only Machines in the Bell System
▪ Ships Readied for Laying Alaska Cable
▪ Ferrite Attenuators for Traveling-Wave Amplifiers
▪ The Mechanism of Plastic Deformation
▪ Special Tracking Camera
▪ Electrical and Weather Seal for Microwave Antennas
▪ Trial of TJ Microwave System Planned
▪ The 1A1 Key Telephone System
▪ Versatility of Crossbar Tandem
▪ Precision Current Adjuster
▪ Development of Wire-Spring Relays
▪ "Hard Tube" Pulsers for Radar
▪ Improved Tube Used in TD-2 Radio Relay System
▪ Submarine Cable Repeaters Tested With Radioisotopes
Vol. 34, No. 51956-05-012.50 MB▪ Silicon Power Diode Development
▪ Autoatic "Answer Only" Set
▪ A Line-Wire Vibration Damper
▪ Flexibility of the 43A1 Carrier Telegraph System
▪ Chemical Brush Control
▪ Engraving a 58-Inch Linear Scale
▪ Traffic Counting with Line-Insulation Test Frame
▪ Aerial Cable Guide
▪ The Post-War Crossbar Switch
▪ Bell System Chief Engineers Visit Chester Field Laboratory
Vol. 34, No. 61956-06-012.35 MB▪ Mechanized Memory and Logic—What Electronics Can Do
▪ Use of Transistor in New Military Telephone System
▪ The Speakerphone
▪ Ultrasonic Delay Lines
▪ Improved Key Handle for PBX Switchboards
▪ Arcing at Telephone Relay Contacts
▪ CAMA—Automatic Trunk-Test Circuit
▪ Repeaters for Twelve-Channel Military Telephone
▪ Wind-Tunnel Hurricanes Used to Test Telephone Equipment
▪ The 1956 AT&T Stockholders Meeting
▪ American Society for Engineering Education Section Meets at Murray Hill Laboratory
▪ Field Trial of Rural Telephone System Concluded in Georgia
▪ San Diego First Large City Added to Nationwide Customer Dialing Network
Vol. 34, No. 71956-07-012.12 MB▪ The Role of Quality Assurance in the Bell System
▪ Intermetallic Semiconductors
▪ Color-Coded Rural Wire
▪ Telephone Sets in Color
▪ Variety of Businesses Help Western Electric Supply Bell System Needs
▪ Color Television on the L1 Coaxial Carrier System
▪ Dispatcher's PBX Switchboard
▪ Automatic Recording of Traffic Data
▪ New Hardware for Type-O Carrier
▪ Balanced Revertive-Pulsing Circuits
▪ Radio Set AN/TRC-24: Exciter and Frequency Control
Vol. 34, No. 81956-08-012.39 MB▪ Transistorized Rual Carrier System
▪ "Fingerprinting" Relays
▪ The New Aluminum Outdoor Telephone Booth
▪ Telephone Protectors
▪ Attendant's Equipment for Small Dial PBX's
▪ High-Speed Magnetically-Operated Coaxial Switch
▪ Dew Line "Radome" Constructed at Whippany Laboratory
▪ A Modern Method of Current-Drain Calculation
▪ Slide Rule for Design of DC Meters
▪ Laboratories Introduces 5300-Type Telephone
▪ Diffused-base Transistors Available for Military Use
▪ Submarine Cable Laying Operations in Progress
▪ W.E. Expands Manufacturing Plants
▪ Bell System Television Network Routes July 1, 1956
Vol. 34, No. 91956-09-012.20 MB▪ Air Force Submarine Cable System
▪ Point-Contact Transistor Action
▪ An Experimental Picture-phone
▪ Electron Microscopy of Ceramics
▪ Systems Testing in the Switching Laboratory
▪ New Equalizers for Local TV Circuits
▪ Relay Contact Protection
▪ The Splicer's Scissors Become More Versatile
▪ Dry-Reed Switches Manufactured by Automation
▪ Earth Furnishes Variety of Bell System Materials
Vol. 34, No. 101956-10-012.24 MB▪ Ferrite Attenuators for Traveling-Wave Amplifiers
▪ Transatlantic Cable Opened to Public Service
▪ Switching at TV Operating Centers
▪ Secretarial Answering Services
▪ Terminals for the New Rural Carrier System
▪ Rapid Line Testing in Crossbar Offices
▪ A Portable Telephone Set for Military Use
▪ New "Watchcase" Terminal for Urban and Rural Wire
▪ AN/TRC-24 Transmitter—RF Power Stages
▪ Dry-Air Pressure System for Exchange Cable
Vol. 34, No. 111956-11-012.33 MB▪ Nobel Prize Awarded to Transistor Inventors
▪ Dislocations and Plastic Flow in Germanium
▪ Silicon Carbide Varistors: Properties and Construction
▪ Dr. M. J. Kelly Delivers Convocation Address at Cooper Union
▪ Concentrator-Identifier for Telephone Answering Services
▪ Reducing Distortion in Mobile Radio Systems
▪ Terminals for Sealed Apparatus
▪ Type-ON: New Short-Haul Carrier
▪ Ceremonies Mark Opening of Transatlantic Cable
▪ "Our Mr. Sun" Introduces Bell System Science Series
Vol. 34, No. 121956-12-012.14 MB▪ Diffusion in Solids—A Breakthrough in Semiconductor Device Fabrication
▪ Maintenance Support of NIKE
▪ Corrosion—The Constant Enemy of Metals
▪ Heat Dissipation from Electronic Equipment: Transistors-vs-Electron Tubes
▪ Intertoll Trunk Transmission Measuring System
▪ Single-Oscillator Microwave Measuring System
▪ Test Sets for No. 5 Crossbar
▪ Carbon Monoxide Indicator
▪ Drop Wire Cap
▪ Lee de Forest Honored on Golden Anniversary of the "Audion" Tube
Vol. 35, No. 11957-01-012.50 MB▪ The Depth of Diffused Layers
▪ Switchboards for Telephone Answering Services
▪ Switching Control at Television Operating Centers
▪ Telephone Service Begins Over New Alaskan Cable
▪ Dial Testing Equipment
▪ First DEW Building Accepted by U.S. Air Force
▪ Power Supplies for the P1 Rural Carrier System
▪ Testing Telephone Cords
▪ Dust on Relay Contacts
▪ Atomic Radiation Used to Study Growth of "Whiskers" On Metals
▪ Bell System Aid to the Blind
▪ Nobel Prizes Awarded in Sweden
▪ AT&T Presudent Frederick R. Kappel Discusses Future of Communications
Vol. 35, No. 21957-02-012.55 MB▪ First Transatlantic Telephone Cable System
▪ The Tone Ringer
▪ Coding Tool for Translator Cards
▪ Radio Communication in Railroad Tunnels
▪ Relay Contact Life in Central Offices
▪ Carrier-Frequency Transformers for P1 Carrier
▪ Equalization of Military Carrier Telephone Systems
▪ Engineering Societies Hold Joint Conference Over Transatlantic Cable
Vol. 35, No. 31957-03-012.54 MB▪ Bell Laboratories Digital Computers
▪ Performance of the A2A Video Transmission System
▪ Conversion of Automatic Ticketing to AMA
▪ A Transistor Gating Matrix for a Simulated Warfare Computer
▪ Supermendur—An Improved Magnetic Alloy
▪ One-Man Aerial Tent
▪ Modernized Line-Finder Units for Step-by-Step
▪ New Solid-State Oscillator for Microwaves
▪ Dr. Kelly Addresses the American Physical Society
▪ AT&T Issues 1956 Annual Report
▪ Walter H. Brattain Describes Ceremonies at Presentation of Nobel Prize
Vol. 35, No. 41957-04-012.56 MB▪ High-Speed Data Transmission
▪ Certain Properties of Ferrites
▪ A Wire-Spring Multicontact Relay
▪ Record Year in 1956 for Western Electric Company
▪ E-Type Repeaters: San Francisco to Oakland Circuits
▪ Divisions of Telephone Numbers in the No. 5 Crossbar System
▪ P1 Rural Carrier: Equipment Features
▪ Nike Hercules Undergoing Final Tests
▪ Thermal Time-Delay Relays
▪ "TJ"—A New Microwave Relay System
▪ Smithsonian Institution Opens New Telephone Exhibit
Vol. 35, No. 51957-05-012.36 MB▪ A Metallurgist's View of Metallurgy
▪ Radio-Relay Routes in Virginia and North Carolina
▪ A Remote Line Concentrator for No. 5 Crossbar
▪ Expansion of Holmdel Location Under Study
▪ Magnetography: The Microscopy of Magnetism
▪ Television Terminals for the L3 System
▪ Bell System TV Shows Win Two National Awards
▪ Converting Automatic Ticketing to Automatic Message Accounting
▪ A Basic Modulation Unit for Military Carrier Systems
▪ New Gloves for Linemen
▪ First DEW Line Sites Turned over to Air Force
▪ Nature's Semiconductors
Vol. 35, No. 61957-06-012.57 MB▪ Fatigue, Creep, and Relaxation in Metals
▪ Evolution of the Transatlantic Cable
▪ Direct Distance Dialing from Panel and No. 1 Crossbar Offices
▪ Miniature Audio Transformers for the P Carrier System
▪ Chairs for Telephone Operators
▪ New High-Power Transistor Announced by Laboratories Engineers
▪ Four-Channel Military Carrier Terminal and Repeater
▪ Relays in the Bell System: Facts and Figures
▪ Experimental "Drive-In" Coin Telephone
▪ Frederick R. Kappel Addresses AT&T Annual Meeting
▪ New Type of Delay Line Developed at Laboratories
Vol. 35, No. 71957-07-012.33 MB▪ A Versatile Source of Millimeter Waves
▪ Diffused-Base Transistors to be Used in Satellite
▪ Pigments in Polymer Materials
▪ Work Begins on Deep-Sea Hawaiian Cable
▪ Automatic Message Accounting Centers in 1957
▪ Bleeding of Oil-Type Preservatives
▪ Transatlantic Submarine Cable Design
▪ Twelve-Channel Millitary Carrier: Order Circuit and Maintenance
▪ Dr. M. J. Kelly Delivers Keynote Address at European Symposium, M. B. McDavitt Describes TH Microwave System
▪ Lahoratories Announces New Ferroelectric
▪ "Leprechaun"
▪ Laboratories Metallurgical Research Results in New Microwave Ferrites
▪ Elastic Moduli of Diamond
▪ "Punched Sleeves" for Cable Splicing
Vol. 35, No. 81957-08-012.31 MB▪ Voice-Actuated Machines: Problems and Possibilities
▪ Marine Tests of Organic Materials
▪ A Broad-Band Microwave Circulator
▪ Wide Use of Short-haul Microwave Predicted
▪ Improvements in Toll Connecting Circuits for Nationwide Dialing
▪ Semi-Automatic Test Set for Varistors
▪ A Capacitance Monitor for Plastic Insulated Wire
▪ CAMA for Step-by-Step Areas
▪ New Ferrite Microwave Amplifier
Vol. 35, No. 91957-09-012.26 MB▪ "Recorded Carrier" System for High-Speed Data Transmission
▪ Air-Ground Circuit for Airlines
▪ Conductive and Resistive Coatings
▪ Thermo-Compression Bonding
▪ Cleaning Semiconductor Components
▪ "Languages" of Digital Computers
▪ Automatic Floating-Zone Refining
▪ Pocket-Radio Signaling
▪ Transmission Features of the USAF Submarine Cable System
▪ Distinctive Ringing Signals for the 500 Set
▪ Remote Positions for CAMA
Vol. 35, No. 101957-10-012.26 MB▪ SAGE Data Transmisison Service
▪ Novel Sources of Electric Power
▪ Polyethylene Bonded with New Process
▪ Semiconductor Diodes Yield Converter Gain
▪ Traffic-Usage Measuring: They Key to Dial Office Engineering
▪ Tin-Germanium Study Proves Resarch Theory
▪ An Improved Microwave Attenuator for Military Use
▪ Miniaturized Tantalum Solid Electrolytic Capacitors
▪ The AMA Assembler-Computer
▪ An Improved Way to Cut Cylindrical Crystals
▪ "Over-the-Horizon" Service Between Florida and Cuba
▪ Intermarker Group Operation in No. 5 Crossbar
▪ DEW Line Ceremonies Mark Network Completion
▪ "Cosmic Rays" Program on Television October 25
Vol. 35, No. 111957-11-016.44 MB▪ Adhesion of Solids: Principles and Applications
▪ The New School for Operating Company Engineers
▪ Thirty-Foot Antenna for the DEW Line
▪ U.S.-Hawaii Telephone Cable System in Service, Plans for Second Transatlantic System Announced
▪ Field Displacement Isolator in Microwave Communications
▪ Effective Patents: A Cooperative Effort
▪ Frederick R. Kappel Addresses Telephone Pioneers Assembly
▪ Transistors, Reliability and Surfaces
▪ Air-Ground Telephone Trial Over Detroit and Chicago Areas
▪ Line-Insulation Testing for Step-by-Step
▪ Laboratories Papers Presented at National Electronics Conference
Vol. 35, No. 121957-12-012.27 MB▪ Simulating Sharpness in Color Television
▪ A Modern Crossbar PBX
▪ The "Twistor" Memory Device
▪ Telephone Communications for RAPCON Centers
▪ Propagation of Millimeter Waves Through the Atmosphere
▪ Microdeviometer for Evaluating Periodic Structures
▪ Cable Splicing Goes Modern
▪ Automatic Calculation of Transmission Deviations
▪ Welding at Relay Contacts
▪ Lightning Protection of TD-2 Stations
▪ A Printer-Comparer-Scanner for AMA
Vol. 36, No. 11958-01-012.44 MB▪ Telephone Switching—An Old Field with a New Future
▪ Brittleness in Polyethylene
▪ Pocket-Radio Signaling
▪ New Ground Strip for Electron Tubes
▪ New Auxiliary Station Signals
▪ Magnetic Amplifiers: Basic Principles and Applications
▪ Computing in the AMA Assembluer-Computer
▪ A New Method for Cleaning Wire-Spring Relays
▪ Reading Handwritten Characters
▪ High-Precision Vernier Resolver
Vol. 36, No. 21958-02-012.19 MB▪ An Experimental Signature-Verification System
▪ Electrical Breakdown in p-n Junctions
▪ Transistors for Rural Telephone Systems
▪ Traffic Studies of Line Concentration
▪ Voltage Conversion with Transistor Switches
▪ A New Method for Cleaning Sequence Switches
▪ An Improved Multiple-Contact Connector
▪ An Automatic Machine for Temperature Cycling
▪ F. R. Kappel Reports Bell System Growth in 1957
▪ "The Unchained Goddess" on TV February 12
▪ Telephone Statistics Show World Trends
▪ Thermal Antioxidants for Polyethylene
Vol. 36, No. 31958-03-011.83 MB▪ A Versatile New Intercom System
▪ The Intrinsic-Barrier Transistor—How It Works
▪ Present and Future of the Bell System
▪ Limiting the Temperature in Outside Plant Housings
▪ Radio Links for ON Carrier
▪ An Experimental Signal for Centralized Calling
▪ "Business Needs Basic Research"
▪ C.J. Davisson, 1881-1958
▪ Farm Housewife Helps Studies of Over-the-Horizon Transmission
Vol. 36, No. 41958-04-012.24 MB▪ Printed Circuits
▪ Organic Vapor and Relay Contacts
▪ Electrical Contact with Thermo-Compression Bonds
▪ "BMEWS": Major Communication Project Announced
▪ AT&T Annual Report Cites Gains in 1957
▪ The Study of Performance in Switching Systems
▪ Line Verification in No. 5 Crossbar
▪ Antenna Filters for a Military Radio System
▪ A New Analysis for Nickel Cathodes
▪ Western Electric Annual Report Shows 1957 Progress
▪ Dataphone Service in Three Bell System Areas
▪ A Field-Effect Varistor
Vol. 36, No. 51958-05-012.28 MB▪ The Concept of Automatic Number Identification
▪ A Method for Soldering Aluminum
▪ Continuous Process for Etching Copper
▪ Repair—Philosophy and Documentation
▪ Coordinate Data Sets for Military Use
▪ Beam Focusing in Microwave Amplifiers
▪ Automatically Recording Tube-Life Data
▪ New Portable Electron Tube Tester
▪ Bell Solar Batteries and Transistors in Vanguard Satellite
▪ AT&T Annual Meeting
▪ White Alice Network Completed
▪ Torsional-Wave Delay Lines
Vol. 36, No. 61958-06-012.47 MB▪ The Transistor—Ten Years of Progress
▪ Semiconductor Research
▪ Research in Circuits and Systems
▪ Transistor Designs—The First Decade
▪ Transmission Applications
▪ Applications in Telephone Switching
▪ Station Apparatus, Power and Special Systems
▪ Military Applications
▪ Transistor Manufacture
▪ Systems Planning
Vol. 36, No. 71958-07-011.93 MB▪ Simulation in Engineering
▪ A Three-Level Sold-State MASER
▪ Electrical Protection for Transistorized Equipment
▪ Low-Noise Amplifier for High Frequencies Uses New Semiconductor Diodes
▪ "Nation's Economic Strength Depends on Business Strength" Kappel Tells Industrial Leaders
▪ Ultrasonic Attenuation in Superconductors
▪ The Trouble Recorder
▪ Germanium Resistance Thermometer
▪ Helium Separation and Purification by Diffusion
▪ J. B. Fisk Heads U.S. Scientist Group for Nuclear-Test Talks
Vol. 36, No. 81958-08-012.26 MB▪ White Alice: A New Radio Voice for Alaskan Outposts
▪ All-Numeral Dialing—Would Users Like It?
▪ Cleaning Electron Device Parts
▪ Magnetic Amplifiers: Bistate Operation and Application
▪ Dr. Kelly Praises Achievements of H.S. Black, 1957 Lamme Medalist
▪ Transformers for Military Communications Systems
▪ Ferromagnetism Without Ferromagnetic Elements
▪ Laboratories Marks a Decade of Transistor Progress
▪ New Station Apparatus Being Field-Tested
▪ New TRADIC System Turned Over to Air Force
Vol. 36, No. 91958-09-012.48 MB▪ New Protectants for Polyethylene
▪ Janus and Switching
▪ New Pole-Type Building
▪ TRADIC: The First Phase
▪ Selective Signaling and Switching for the SAGE System
▪ Automatic Line-Switching for L3 Carrier
▪ Cape Canaveral Test Center: Transmission Equipment for Submarine Cable
▪ Nike Hercules in Production
▪ Simulation Speeds Research at Bell Laboratories
▪ Shore Operations for European Cable Completed
▪ New Hydrothermal Process for Growing Cultured Sapphires
▪ New Telephone Design to Be Produced in 1959
Vol. 36, No. 101958-10-012.40 MB▪ An Experimental Electronic Switching System
▪ Precision Evaporation and Alloying
▪ Through-Connections for Printed Wiring
▪ A New Coil-Testing Method
▪ Extended CAMA with No. 5 Crossbar
▪ A High-Speed Data Signaling System
▪ A Transistor Amplifier for Operators' Headsets
▪ Telephone Circuits Tested for Data Transmission
▪ "Flash Pyrolysis": New Flash-Heating Technique Initiates Thermal Reactions
▪ "Gateways to the Mind": Latest Science Program to Show Senses at Work
▪ High-Speed Diode for Switching and Computer Applications Announced
Vol. 36, No. 111958-11-012.61 MB▪ Studying Tomorrow's Communications… Today
▪ An Experimental Transistorized Telephone
▪ Measuring Time in Central Offices
▪ A New "Ready-Access" Distribution Terminal
▪ Joining Armor Wire for Transoceanic Telephone Cable
▪ A New AMA Translator for No. 5 Crossbar
▪ Teletypewriter Intersystem Operation
▪ New Experimental Booth Made of Plastic Combines Privacy and Visibility
▪ Metal Sputtering: A Promising New Technique for Printed Circuitry
▪ Bell System Aids in Supporting New TV Course in Physics
▪ Measuring Vibration on Telephone Poles
▪ Laboratories Announces Magnetically Regulated High-Voltage DC Supply
Vol. 36, No. 121958-12-012.25 MB▪ On-Hook, Off-Hook: Signaling Over the Telephone Network
▪ Transistor Voltage Regulators
▪ An Experimental Gas Diode Switch
▪ New Broad-Band Oscilloscope Tube
▪ Ten Years of AMA
▪ The "Two-in-One" Wire-Spring Relay
▪ Carrier Terminals for the Transatlantic Telephone Cable
▪ Six Papers Are Presented to the IRE Electron Devices Group
Vol. 37, No. 11959-01-012.33 MB▪ Development of the DEW Line
▪ Semiconductors in Strain Gauges
▪ Flexible Repeaters for the Transatlantic Telephone Cable
▪ Synthetic Quartz in Pilot Production at Western Electric
▪ An Analog Computer for Evaluating Radar Performance
▪ Broad-Band Oscilloscope—An Application
▪ Crossbar Circuitry for a Small PBX
▪ J.B. Fisk Elected President of Laboratories, M.J. Kelly, Chairman of the Board, E.I. Green, Executive Vice President
▪ A New Correcting Code for Bursts of Errors
Vol. 37, No. 21959-02-012.29 MB▪ New Uses for Short-Haul Carrier
▪ The New 9A Announcement System
▪ A "Dry-Land" Ocean at Chester
▪ Nike-Ajax: An Integrated Guided-Missile System
▪ Fittings for Underground Conduit
▪ Terminal for Twelve-Channel Military Telephone
▪ Selective-Calling Teletypewriter Systems
▪ New Shift Register Uses "Twistor" Principle
▪ F.R. Kappel Describes Bell Defense Projects
▪ New Powder-Pattern Technique Delineates Ferroelectric Domains
▪ The Call Director
▪ Soil-Test Program for Materials, Structures
Vol. 37, No. 31959-03-012.14 MB▪ TASI: Time Assignment Speech Interpolation
▪ Transistors for Electronic Switching
▪ Test Patterns for Printed-Circuit Materials
▪ Canaveral Test Range: Timing-Signal Transmission
▪ New Method for Splicing Rural and Urban Wires
▪ Message Billing in No. 5 Crossbar CAMA
▪ A New Gauge for Testing Pressurized Cable
▪ Buried Telephone Plant in Residential Areas
▪ M.J. Kelly Retires from Bell Telephone Laboratories
▪ Electronic Circuit Simulates Living Nerve Cell
Vol. 37, No. 41959-04-012.22 MB▪ The Merrimack Valley Laboratory
▪ The TJ Radio System
▪ The Nike-Ajax Missile
▪ A Faraday Rotation Switch for the TH System
▪ Polarization Reversal in Barium Titanate
▪ A New Protector for Telephone Lines
▪ AT&T Reports 1958 Progress
▪ Compatible System for Stereophonic Sound Demonstrated Over Television and Radio
▪ "SPUD" is O.E.T.P. Aid
Vol. 37, No. 51959-05-012.14 MB▪ The "Information" Problem
▪ Line Scanning in ESS
▪ A Portable Frequency Standard
▪ Signaling in P1 Carrier
▪ Lightweight Aerial Platform
▪ Equalization of Aural and Visual Delay
▪ Jacketed Cords for Telephone Sets
▪ Titan Guidance System Successfully Tested
▪ AT&T Annual Meeting
▪ Laying Begun for First Direct-to-Europe Cable
▪ Field-Effect Tetrode: A Multipurpose Device
Vol. 37, No. 61959-06-012.11 MB▪ Missle Guidance
▪ "Even-Count" Cable
▪ A Method of Correcting Errors in Data Transmission
▪ New Equipment for Mobile Telephones
▪ Two-Terminal p-n-p-n Switches
▪ New Methods for Outside Plant Crews
▪ Thermistor Widely Used in Modern Platforms
▪ Capacity Increased for Floating Zone Refiners
Vol. 37, No. 71959-07-011.97 MB▪ The Idea of Time Sharing
▪ Plastics for Undersea Cables
▪ A Transistorized Signaling System: Engineering Aspects
▪ Filters for the P1 Carrier System
▪ Power Supplies for the Clarenville-to-Oban Submarine Cables
▪ Low-Melting Glasses for Encapsulating Electronic Devices
▪ High-Temperature Electrical Insulation
▪ Compatible Stereo From Bell Laboratories Featured on Radio
Vol. 37, No. 81959-08-012.19 MB▪ The Fine Art of Measurement
▪ Colored Plastics for Wire and Cable
▪ Simulation with Digital Computers
▪ Microwave Radio-Relay Towers
▪ Flexural Noise in Cables
▪ Power for the AFMTC Submarine Cable System
▪ Experimental Set Using Push Buttons Placed on Trial
▪ Field Test of New Dataphone
Vol. 37, No. 91959-09-012.50 MB▪ Exotic Radio Communications
▪ The Diffusion of Impurities Into Evaporating Silicon
▪ A Variable-Cycle Announcement Machine
▪ Sorting Methods in Large Business Operations
▪ Message-Waiting Service
▪ 4A and 4M Toll Crossbar With CAMA Equipment
▪ "Communications to Come"
▪ The Radars of Nike-Ajax
▪ New Artificial Larynx From Solid-State Devices
▪ Feedback Problem Solved for Public-Address Systems
▪ Sputtered Resistors Make High Component Density Possible
Vol. 37, No. 101959-10-012.11 MB▪ An Experimental Flying-Spot Store for Electronic Switching
▪ The Variable-Capacitance Parametric Amplifier
▪ Ground Broken for New Building at Holmdel
▪ Communications with Large-Scale Computers
▪ No. 4 CAMA and the "Bylink" Circuit
▪ An RF Power Transmitter
▪ Miniature Crystal Filters
▪ Satellite Communication Station Being Built at Holmdel Location for Use in Transmission Tests
▪ New Stepping Transistor Developed by Bell Laboratories
▪ Laboratories to Develop UNICOM Network
▪ Ship Model Built at Chester to Test Cable-Laying Art
▪ Nike-Zeus Test Sites to be Constructed
▪ Western Electric to Build Network for Tracking Mercury Satellite
Vol. 37, No. 111959-11-012.07 MB▪ The Twistor: A New Magnetic Memory Element
▪ A Compatible Stereophonic Sound System
▪ Reliability of Glass Seals for Undersea Cables
▪ The Teletrainer
▪ New Dial-Pulse Register for No. 4-Type CAMA
▪ Automatic Control of a Pipeline
▪ A New Coin-Disposal Mechanism for Pay Telephones
▪ President Kappel Speaks to Pioneers on Growth of Telephone Industry
▪ Plates for ESS Memory Processed Automatically
▪ New Reaching Machine Has a Ten-Word Vocabulary
Vol. 37, No. 121959-12-012.21 MB▪ A Tester for the Nike Missle Systems
▪ Personal Signaling in Columbus, Ohio
▪ Optical Microscopy: A Key to Metallurgical Progress
▪ Dr. Fisk Again Heading U.S. Group for Nuclear Test Talks at Geneva
▪ A New Coin Telephone
▪ A New Multicontact Connector
▪ A Barrier-Grid Tube Memory
▪ Sources of Temporary Illumination
▪ Bigger Boron Crystals Produced By Floating Zone Melting Method and New "Pressed-Bar" Technique
▪ Mammoth Navy Antenna Will Aid Radio Astronomy Studies
▪ Laying Operations Begin for U.S. to Puerto Rico Cable
▪ New Arrangement for Distortionless Mobile Radio
▪ Nike-Zeus Missile Tested at White Sands
Vol. 38, No. 11960-01-012.18 MB▪ Machine Memory in Telephone Switching
▪ Closed-Circuit Educational TV Systems
▪ Mechanical Design of a Flying-Spot Store
▪ A Miniature Lacquer-Film Capacitor
▪ Alumina Powder Used to Protect Electronic Components
▪ An Experimental "Dial-In-Handset" Telephone
▪ The Nike Ajax Computer
▪ New Mexico Site Will Test Effects of Alkaline Soil on Buried Plant Equipment
▪ Western Electric Now Making Traveling Wave Tube for TH Radio Relay System
Vol. 38, No. 21960-02-012.17 MB▪ The Complexity of the Transmission Network
▪ A Central Control for ESS
▪ High-Purity Nickel
▪ Leprechaun Computer
▪ A High-Performance Tetrode for TH Radio Relay
▪ Redesign of Low-Frequency Networks
▪ Western Electric Sets Production, Repair Marks
▪ Varactor Diode Used in UHF Radio Receiver
Vol. 38, No. 31960-03-012.20 MB▪ Push-Button "Dialing"
▪ Semiconductor Reliability Studies
▪ Magnetic Amplifiers: Analog Operation and Applications
▪ Measuring Line Level on Telephoto Systems
▪ Nike-Zeus Successful in Test Firing at White Sands
▪ New Audio Facilities for Recorded Announcements
▪ Coin Zone Dialing in No. 5 Crossbar
▪ Two Titan Missiles Successfully Guided by Laboratories-Developed Command Guidance System
▪ New Traveling-Wave Aplifier Uses Esaki Diodes
▪ The Laboratories Role in Project Mercury
▪ New Modulator for Millimeter Waves
▪ Laboratories Detection System Finds Missile Nose Cones
▪ New Indoor-Outdoor Phone Booth Designed at the Laboratories
Vol. 38, No. 41960-04-012.13 MB▪ Nike in the Air Defense of our Country
▪ New Dimensions in Metallurgy
▪ Logic Circuits for an Electronic Switching System
▪ Radar Interference with Microwave Radio
▪ A New Fluttermeter
▪ Two New Overseas Services Link U.S. with Nassau and Puerto Rico
▪ Annual Report Cites Gains in Earnings and Plant
▪ The Ferreed: A New Magnetic Switch
▪ Voice Message Reflected From Sphere in Space
▪ High-Speed Diode Switch Described to A.I.E.E.
Vol. 38, No. 51960-05-012.18 MB▪ Amplifying with Atoms
▪ White Sands Branch Laboratory: Test Center for Nike Missiles
▪ Mechanical and Equipment Design for an Electronic Central Office
▪ Intensity of Sound Affects Listener's Ability to Locate Direction of its Source
▪ Automated Environmental Testing at the Chester Laboratory
▪ Automation in Teletypewriter Switching
▪ Extremely Sensitive Receiver Built with Maser and Low-Noise Antenna
▪ Three Visual Concepts Announced at the American Optical Society Meeting
▪ Tiros Weather Satellite Placed in Orbit by BTL Command Guidance System
▪ Latest Inorganic Glasses Liquid at Room Temperature
▪ Oxygen May be Key to Magnetic Annealing
Vol. 38, No. 61960-06-012.46 MB▪ An Experimental "Short-Hop" Microwave System
▪ The Traveling-Wave Tube Goes to Work
▪ Automatic Number Identification
▪ DX Signaling: A Modern Aid to Telephone Switching
▪ 4A and 4M CAMA: Trunk Class Translator
▪ Miniaturized Power Transformers
▪ The Shape Recognizer
▪ A New Noise-Measuring Set
▪ Transparent Gallium Phosphide Prepared as Aid to Semiconductor Research
▪ Record Construction Program Announced at AT&T Annual Meeting
▪ Gallium-Arsenide Diodes Show Improved High-Frequency Performance
Vol. 38, No. 71960-07-012.20 MB▪ The Navy's New Defense Against Air Attacks
▪ Sixteen-Channel Banks for Submarine Cables
▪ Transistorized Carrier System for TV
▪ The Direct-Line Emergency Reporting System
▪ Power Supply for TJ Repeaters
▪ 4A and 4M CAMA Routing Arrangements
▪ New Piezoelectric Compounds Exhibit Large Coupling Constant
▪ Hearing Effect Reproduced Electronically
▪ Nike Hercules Destroys Corporal Missile in Test
▪ Electrical Stroboscope Measures Extremely Short Pulses
▪ Epitaxial Film Technique Brings Major Improvements in Diffused-Base Transistor
Vol. 38, No. 81960-08-012.24 MB▪ Reliability in Telephone Engineering
▪ The Use of Statistics in Device Development
▪ Simulating Speech Through Space
▪ Current Experiments in Person-to-Person DDD
▪ Circuit Design of an Improved Teletypewriter Switching System
▪ Automatic Processing of Code Plates for Data Storage
▪ Communications in the Space Age
Vol. 38, No. 91960-09-012.28 MB▪ The DDD Relay
▪ Simulating Electronic Switching with a Computer
▪ Project Echo Transmits Telephone Messages via Satellite
▪ A Diffused-Silicon Varistor
▪ Emergency Reporting: The Concentrator System
▪ A New Enclosed Main-Frame Connector
▪ Bell System Proposes World Communications Network Via Outer Space
▪ New Efficient Thermoelectric Material
▪ Telephone Conversation Goes by Way of Moon
▪ Successful Public Demonstration of Anti-Feedback Circuit
Vol. 38, No. 101960-10-012.52 MB▪ An Electronic Artificial Larynx
▪ Telephone Circuits: A New Link in Data Communications
▪ An Improved Antenna Orientation Method
▪ Transistorized Units for In-Band Signaling
▪ Packaged Buildings for TJ Microwave Systems
▪ A New Design for Power Resistors
▪ Detection of Decay in Treated Wood
▪ Future Submarine Cable Plans Include Cable Ship
▪ New Polyethylene Protectants Discovered
▪ "Catenanes": A New Type of Molecule
▪ A Commercial Use of Desk-Top PBX
Vol. 38, No. 111960-11-011.90 MB▪ Infrared and Optical Masers
▪ The CDT-NYU Program
▪ The "ON-over-K" Carrier System
▪ Oxide Masking
▪ Air Gages for Checking Waveguide Dimensions
▪ Test Circuits for Toll Crossbar
▪ F. R. Kappel Talks About New Services
▪ Laboratories Scientists Honored for Outstanding Achievement
▪ New Nike-Zeus Contract to be Directed by Laboratories
▪ New Dimensions in Spring Cords
▪ TASI Aids in Doubling Capacity of Ocean Cable
▪ Laboratories Scores Success in Nike Mobility Program
▪ New Nomenclature Proposed to Aid the Scientist and Engineer
Vol. 38, No. 121960-12-012.17 MB▪ ECO Trial Begins
▪ A New Group-Alerting System
▪ Bell System to Build and Launch Active Satellite
▪ Research on Oxide-Coated Cathodes
▪ Magnetic-Latching Crossbar Switches
▪ Canaveral Test Range: Filters and Equalizers for Unattended Repeaters
▪ The "B" Canvas Tray
▪ Nike Zeus Test Center at Kwajalein
▪ All-Number Calling Being Introduced in Bell System
▪ Echo I Used as Space Mail Carrier
▪ Bell System Telephones Reach 60 Million
▪ Home Interphone Service to be Available Throughout the Bell System in 1961
▪ One Million Princess Phones
▪ Nation's Largest Data-Phone Network Installed
Vol. 39, No. 11961-01-012.26 MB▪ "Diodes Can Do Almost Anything"
▪ Engineering for Safety in the Outside Plant
▪ Field Testing an Experimental Telephone
▪ High-Purity Nickel Cathodes: Performance Studies
▪ Directing Naval Weapons
▪ New Air Dryer for Pressurizing Cables
▪ 2.5 Billions for Expansion and Improvement in 1961
▪ E. I. Green Retires
▪ Nike-Zeus Guidance System Successful
▪ New Postage Stamp Features Echo I
▪ Command Guidance System Guides Tiros II Into Orbit
▪ New Cable Ship To Be World's Largest
Vol. 39, No. 21961-02-012.51 MB▪ ESSEX: A New Concept in Telephone Communications
▪ TH Radio Relay System
▪ Quality-Control Techniques Applied to Dial-Office Load Balancing
▪ An Improved Amplifier for Program Circuits
▪ Analysis of Atmospheres in Manufacture of Electronic Devices
▪ Equipment Features of the 82B1 Teletypewriter Switching System
▪ First Computer-Designed Computer Developed by Bell Laboratories
▪ New Look at Over-theHorizon Transmission
Vol. 39, No. 31961-03-011.92 MB▪ Research Breakthroughs in Optical Masers and Superconductors
▪ Measuring Semiconductor Lifetime
▪ How Environment Affects Ocean Cables
▪ Automatic Number Identification: Outpulsers and Identifiers
▪ FCC Approves "WATS" Plan
▪ Repeaters for Transatlantic Cables: Passive Components
▪ New Electrochemical Technique for Polishing Semiconductor Wafers
▪ Project Mercury Communications Network Near Completion
▪ Frequencies Authorized for Satellite Communications Experiment
▪ TELPAK: Versatile Broadband Service Offered for Large Volume Communications Users
Vol. 39, No. 41961-04-011.89 MB▪ Land Extensions for Transoceanic Cables
▪ Esaki Diodes
▪ Antenna Steering for Echo I
▪ Cathode-Ray Displays in Weapon-Direction Systems
▪ Multistation Operation in the 82B1 Teletypewriter Switching System
▪ Electroforming Waveguide Parts
▪ Antiozonant Research Aims at Better Inhibitors for Elastomers
▪ Optical Masers and Micrography
▪ AT&T Annual Report Describes Technological Advances
▪ New High-Frequency Ultrasonic Transducer
Vol. 39, No. 51961-05-012.30 MB▪ Voice Communication System for Air Traffic Control
▪ A Pushbutton PBX Switchboard
▪ New Superconducting Ductile Alloys
▪ Techniques for Microwave Breakdown Measurements
▪ A Concentricity and Diaeter Gage for Ocean Cable
▪ Operator-Training Equipment
▪ Testing Transistors for the Electronic Central Office
▪ World's Largest Antenna for Space Communications
▪ Space Communications Proposal Highlights AT&T Annual Meeting
▪ Bell Laboratories System Guides Satellite and Space Probe
▪ Balloons to Carry ICBM Radar Test Targets
▪ Transatlantic and Caribbean Cables Planned
▪ Testing Telephones for Tomorrow
Vol. 39, No. 61961-06-012.17 MB▪ Missile Impact Locating System
▪ Central-Office Receiver for Touch-Tone Calling
▪ New Way to Seal Cable Joints
▪ Transistor Development for Manufacture
▪ Computer Indexes Scientific Documents
▪ High-Speed Photography and Micrography
▪ Card Dialer Telephone Will Be Marketed
▪ Metering Gas in Telephone Cables
▪ Speeding Calls Through a PBX
▪ Mercury Communications Network Completed
Vol. 39, No. 71961-07-012.19 MB▪ SAC's Primary Alerting System
▪ Overseas Dialing: A Step Toward Worldwide Telephony
▪ Air-Drying Apparatus for Microwave Systems
▪ F. R. Kappel Stresses Defense Communications
▪ A Self-Protecting Transistor for the E-6 Repeater
▪ Training Simulator for Flight Controllers
▪ Static Frequency-Generators for Ringing Power
▪ Sapphires to Protect Telephone Satellites From Space Hazards
▪ Service Quickly Restored After Repeater Station Blasts
▪ New Instrument Measures Punching Pressure
Vol. 39, No. 81961-08-016.24 MB▪ Electronic Memory Devices
▪ Measuring the Sky's Electrical Noise
▪ Portable Ruby Optical Maser Demonstrated by the Laboratories
▪ A New Surface-to-Air Data Communication System
▪ Command Guidance Puts Tiros III in Orbit
▪ The Art of Counting Calls
▪ Nike-Zeus Fired From Underground Cell
▪ Western Electric Awarded UNICOM Contract
▪ A Statistical Ammeter
▪ The Ferrite Isolator: A New Kind of Pad for TJ Radio-Relay
▪ Resistors for Nike-Zeus Made On a Completely Automated Line
▪ Trial Begins on PCM Transmission System
▪ Announcement System Makes New York Debut
Vol. 39, No. 91961-09-012.33 MB▪ Project Echo
▪ The Versatility of TOUCH-TONE Calling
▪ Measurements of Strength Reduction Reveal Wood Decay
▪ Light Amplifiers and Power Sources Discussed at WESCON Meeting
▪ Removing Water From Buried PIC Cable
▪ Blocking Filters for Coaxial Cables
▪ A New Look at Equipment Development
▪ Automation in X-Ray Crystallography
▪ Command Guidance System Directs Explorer XII Into Precise Orbit
Vol. 39, No. 101961-10-012.59 MB▪ Around the World By Simulation
▪ Mercury Spacecraft "Proves In" Ground Tracking Network
▪ The Autoatic Card Dialer
▪ Helium and Diffusion Separation
▪ Bell System Data Processing Today
▪ Applications for E6 Repeaters
▪ Displays for Weapons Direction Equipment
▪ Test Equipment for the 82B1 Teletypewriter Switching System
▪ Command Guidance Plays Roles in Titan Hardened-Complex Launch
▪ Solid-State Device Directly Amplifies Ultrasonic Waves
Vol. 39, No. 111961-11-012.80 MB▪ The BMEWS Communications System
▪ The Search for New Semiconductors
▪ Optical Maser Symposium at Bell Laboratories
▪ Decentralization: A Feature of Today's Bell Laboratories
▪ Interstitial Channels for the TD-2 System
▪ Concrete for Cable Conduit
▪ Laboratories Scientists, In Japan, Report on Solid-State Research
▪ Radome Takes Shape at Space Center
▪ Data Terminal Equipment Described at A.I.E.E. Meeting
Vol. 39, No. 121961-12-012.36 MB▪ The Changing Pattern of Exchange Outside Plant
▪ New Way to Measure Variatios in Rotational Speed
▪ Neutralizing Transformers
▪ Nike-Zeus Scores Successes in Four Test Firings
▪ Central-Office Modifications for TOUCH-TONE Calling
▪ Automated Handling of Pins for B Cable Clips
▪ Computer Simulates Auditorium Acoustics
▪ High Temperature Resonators Made from Electrolyzed Quartz
▪ Silicon Crystals in "Ribbon" Form
▪ New Program to Safeguard Country's Technological Supremacy
Vol. 40, No. 11962-01-018.06 MB▪ The Coil-Spring Connector
▪ Nike-Zeus Scores Successes In Development Tests
▪ Accelerated Aging of Semiconductors
▪ Class-of-Service Markings—What and Why
▪ Two New Science Films Produced for Colleges
▪ The TJ Microwave Diversity Switch
▪ Insulation-Piercing Terminal for C Rural Wire
▪ Telstar: Components and Testing
▪ Full-Scale Electronic Central Office Planned for New Jersey
Vol. 40, No. 21962-02-018.34 MB▪ Engineering Drawings on Microfilm
▪ The TL Microwave System
▪ Machine Aids to Design
▪ CAMA for Step-by-Step Intertoll
▪ Transistorized Shorts Tester for Electron Tubes
▪ New Military Switching System Goes Into Operation
▪ New Infrared Spectroscopic Technique
▪ Continuous Operation Achieved in Solid-State Optical Maser
▪ Experimental Telephone is Field Tested
▪ Bell System Launches Cable-Laying Ship
▪ Nike-Zeus Destroys Simulated ICBM _ Holmdel Prepares for Project Telstar
Vol. 40, No. 31962-03-019.09 MB▪ A Low-Speed Data Set for High-Speed Business
▪ The Structure of Crystals
▪ Unique Acoustic Properties Found in Yttrium Iron Garnet
▪ Laboratory for Ocean Cable
▪ Compatibility in Telephone Communications
▪ Telstar—Satellite Tests
▪ New Low-Noise Parametric Amplifier Operates at 6 kmc
▪ Continuous Operation Achieved in Ruby Optical Maser
▪ Tracking and Communications Network Vital to Glenn's Orbital Flight
Vol. 40, No. 41962-04-018.94 MB▪ Search-Radar Tracking In Heavy Seas
▪ An Electronically Scanning Radar Antenna
▪ Soil-Testing Materials and Apparatus
▪ New Handset Will Aid the Hard of Hearing
▪ Human Factors in Transmission Maintenance
▪ AT&T Signs Agreement for Transpacific Cable
▪ Rutgers University and Laboratories to Erect Particle Accelerator
▪ Electronic Switching Control Techniques
▪ Laboratories System Guides NASA Solar Observatory Into Orbit
▪ The B Voltage Tester and Auxiliaries
Vol. 40, No. 51962-05-018.42 MB▪ Low-Noise Microwave Amplifiers
▪ TH Microwave Carrier Supply
▪ New Information on Nuclear Fission Fragments
▪ TELSTAR—The Andover Ground Station
▪ Automatic Protection Switching for the TH System
▪ Laboratories Appraises Programmed Learning
▪ Simulation Tests on TELSTAR Antenna
▪ Silicon Solar Cells Measure High Intensity Radiation
▪ Low Cost, High Quality Quartz Grown By New Lithium-Doping Process
▪ AT&T Testifies on Satellite Legislation
▪ Labs System Guides International Satellite
▪ SAC Accepts Operational Titan
▪ Air-Ground Service to Be Extended
Vol. 40, No. 61962-06-019.28 MB▪ Thermoelectric Devices and Materials
▪ Symbolic Logic: The Propositional Calculus
▪ Quick-Connect Clip Terminal
▪ Human Factors Engineering and Modern Communications
▪ Mercury Tracking System Aids Carpenter Flight
▪ Testing Equipment for the E6 Repeater
▪ Voice Spectrograms Are Unique Personal Identification
▪ Digital Computer Synthesizes Human Speech
▪ Tantalum-Sputtered Resistors Improved by Adding Nitrogen
▪ New Coin Telephone Set Given Field Trial
Vol. 40, No. 71962-07-019.33 MB▪ TWX Goes Dial
▪ Eastern Third of Blast-Resistant Cable System Nears Completion
▪ Symbolic Logic: The Extended Language
▪ Machine Diagnoses its Own Failures: Writes Dictionary for Cures
▪ Growing Oxide Crystals
▪ Telstar Success
▪ New Developments in Gaseous Optical Masers
▪ Packaging and Equipment Design for the E6 Telephone Repeater
Vol. 40, No. 81962-09-018.85 MB▪ Bell Laboratories and Project Mercury
▪ The Surfaces of Solids
▪ Epitaxy and Transistor Fabrication
▪ The B Wire Connector for Cable Splicing
▪ The 1A Line Concentrator
▪ Optical Maser Amplifier Announced By Bell Laboratories
▪ New Two-Way Repeater Amplifies 128 Telephone Conversations
▪ Laboratories Develops New Method for Growing Beryl Crystals
Vol. 40, No. 91962-10-018.83 MB▪ The Holmdel Laboratories
▪ President Kennedy Signs Satellite Communications Bill
▪ CENTREX Service with No. 5 Crossbar
▪ The Industrial Designer—His Role and Purpose
▪ Simplified EPR Technique Devised
▪ New Synthetic Crystals are Piezoelectric and Fluorescent
▪ Clocks on Two Continents Synchronized by Telstar
▪ For No. 5 Crossbar: A Packaged Central Office
▪ Locating Open Conductors In Multiple-Line Wire
▪ TWX System Successfully Converted to Dial Operation
▪ Two-Way Voice Channel Via Telstar Established with Compact Ground Station
Vol. 40, No. 101962-11-019.07 MB▪ The Cape Canaveral Laboratory
▪ The T1 Carrier System
▪ Sintered Circuits
▪ TH Radio Terminals
▪ Canadian "Alouette" Satellite Guided Into Orbit by Command Guidance System
▪ Evolution of Cable-Laying Plows
▪ Centralized Supervisor Facilities
▪ New Surface Analyzer
▪ High-Speed X-Ray Spectrograph
▪ Telstar Provides High-Altitude Radiation Data
▪ Fiber Optics Aids High-Speed Photography
▪ Telstar Relays Tape Schirra's Launch to Europe
Vol. 40, No. 111962-12-019.42 MB▪ The Columbus Branch Laboratory
▪ Strain Gages
▪ The Electronic Central Office at Morris, Illinois
▪ Maintaining the ANI System
▪ New Phenomenon Observed in Superconducting Tunnel Diodes
▪ Theuerer Wins Patent for Floating Zone Melting
▪ Miniature Relays for Key Telephone Systems
▪ Bell System Assisting in NASA's Project Relay
▪ Highly-Sensitive Microphone Uses Transistor as Base
▪ Telstar Develops Difficulties in Command Circuit
▪ Princess Phone Gets Own Bell
▪ Gallium Arsenide Diode Used As Low-Temperature Thermometer
▪ Data-Phone Extended to Facsimile Transmission
▪ Advances in Optical Maser Technology Described at NEREM
▪ Laboratories Scientists in Seattle Report on Acoustics Research
Vol. 41, No. 11963-01-017.14 MB▪ An FM Data Set for Voiceband Data Transmission
▪ Telstar II to be Launched in Spring
▪ Instrument Evaluation for Missile Application
▪ New Range Charts for PBX Operation
▪ Strain Waves in Crystal Rotated By Magnetic Field
▪ A Missile-Borne Traveling-Wave Tube
▪ Telstar Transmits Transatlantic Pictures Again
▪ Metals Joined to Thermoplastics With Single Layer of Molecules
Vol. 41, No. 21963-02-019.41 MB▪ Rubber and Its Use in the Bell System
▪ 101 ESS: A More Flexible Telephone Service for Business
▪ Tantalum Thin-Film Circuitry and Components
▪ SS1 Selective Signaling System
▪ Telstar Reports: High Russian Blasts Cause Surge of Radiation in Space
▪ Position-Independent Mercury Contacts
▪ Science and Engineering Symposium Held at Laboratories
Vol. 41, No. 31963-03-017.69 MB▪ NIKE ZEUS
▪ A Microwave Systems Combining Network
▪ High-Gain Optical Maser Developed
▪ Chemical Polishing of Gallium Arsenide
▪ Crystals for Optical Masers
▪ Development Contractor Named For Sprint Missile
▪ The 6A Impulse Counter
▪ Waffle-Iron Construction Promises Compact, High-Speed Memory Device
▪ New Switching Network Developed for Government Agencies
▪ Telstar Fails to Respond to Commands
▪ Large Zinc Oxide Crystals Grown From Seeds
▪ Fastener Study
▪ Transistorized Submarine Cable Planned for 1966 Use
▪ Undersea Cable to Jamaica Completed
Vol. 41, No. 41963-04-0115.39 MB▪ Project Telstar: Its Aims and Purposes
▪ Design and Construction of the Horn Antenna
▪ The Horn-Antenna Direction System
▪ The Ground Station Transmitter and Receiver
▪ The Satellite Power System
▪ The Satellite Microwave Repeater
▪ Satellite Command and Telemetry System
▪ Thermal Design of the Electronics Canister
▪ Space Hardware Aspects of the Satellite
▪ Launch Operations at Cape Canaveral
▪ Telstar II Satellite Launched