Table of Contents

VOLUME I

Fundamental Principles By K. B. Miller and S. G. McMeen [[A]] Page 11

[CHAPTER I]—Acoustics—Characteristics of Sound—Loudness—Pitch—Vibration of Diaphragms—Timbre—Human Voice—Human Ear

[CHAPTER II]—Speech—Magneto Telephones—Loose-Contact Principle—Induction Coils

[CHAPTER III]—Simple Telephone Circuit—Capacity—Telephone Currents—Audible and Visible Signals

[CHAPTER IV]—Telephone Lines—Conductors—Inductance—Insulation

Substation Equipment By K. B. Miller and S. G. McMeen Page 63

[CHAPTER V]—Transmitters—Variable Resistance—Materials—Single and Multiple Electrodes—Solid-Back Transmitter—Types of Transmitters—Electrodes—Packing—Acousticon Transmitter—Switchboard Transmitter

[CHAPTER VI]—Receivers—Types of Receivers—Operator's Receiver

[CHAPTER VII]—Primary Cells—Series and Multiple Connections—Types of Primary Cells

[CHAPTER VIII]—Magneto Signaling Apparatus—Battery Bell—Magneto Bell—Magneto Generator—Armature—Automatic Shunt—Polarized Ringer

[CHAPTER IX]—Hook Switch

[CHAPTER X]—Electromagnets—Impedance, Induction, and Repeating Coils

[CHAPTER XI]—Non-Inductive Resistance Devices—Differentially-Wound Unit

[CHAPTER XII]—Condensers—Materials

[CHAPTER XIII]—Current Supply to Transmitters—Local Battery—Common Battery—Diagrams of Common-Battery Systems

[CHAPTER XIV]—Telephone Sets: Magneto, Series and Bridging, Common-Battery

Party-Line Systems By K. B. Miller and S. G. McMeen Page 227

[CHAPTER XV]—Non-Selective Party-Line Systems—Series and Bridging—Signal Code

[CHAPTER XVI]—Selective Party-Line Systems: Polarity, Harmonic, Step-by-Step, and Broken-Line

[CHAPTER XVII]—Lock-Out Party-Line Systems: Poole, Step-by-Step, and Broken-Line

Protection By K. B. Miller and S. G. McMeen Page 287

[CHAPTER XVII]—Electrical Hazards

[CHAPTER XIX]—High Potentials—Air-Gap Arrester—Discharge across Gaps—Types of Arrester—Vacuum Arrester—Strong Currents—Fuses—Sneak Currents—Line Protection—Central-Office and Subscribers' Station Protectors—City Exchange Requirements—Electrolysis

Manual Switchboards By K. B. Miller and S. G. McMeen Page 317

[CHAPTER XX]—The Telephone Exchange—Subscribers', Trunk, and Toll Lines—Districts—Switchboards

[CHAPTER XXI]—Simple Magneto Switchboard—Operation—Commercial Types of Drops and Jacks—Manual vs. Automatic Restoration—Switchboard Plugs and Cords—Ringing and Listening Keys—Operator's Telephone Equipment—Circuits of Complete Switchboard—Night-Alarm Circuits—Grounded and Metallic Circuit Line—Cord Circuit—Switchboard Assembly

[Review Questions] Page 387

[Index] Page 401

[A] For professional standing of authors, see list of Authors and Collaborators at front of volume.