ounder
telephone receiver
vibrating bell
visible
electric lamp signal
electromagnetic signal
Electrodes
arrangement of
carbon preparation
multiple
single
Electrolysis
Electromagnetic method of measuring telephone currents
Electromagnetic signal
Electromagnets and inductive coils
conventional symbols
differential electromagnet
direction of armature motion
direction of lines of force
electromagnets
low-resistance circuits
horseshoe form
iron-clad form
special horseshoe form
impedance coils
kind of iron
number of turns
types
closed-circuit
open-circuit
toroidal
induction coil
current and voltage ratios
design
functions
use and advantage
magnet wire
enamel
silk and cotton insulation
space utilization
wire gauges
magnetic flux
magnetization curves
magnetizing force
mechanical details
permeability
reluctance
repeating coil
winding methods
winding calculations
winding data
winding terminals
Electrostatic capacity
unit of
Electrostatic telephone
Enamel

F

Five-bar generator
Fuller cell

G

Galvani
Generator armature
Generator cut-in switch
Generator shunt switch
Generator symbols
Granular carbon
Gravity cell

H

Hand receivers
Harmonic method of selective signaling
advantages
circuits
in-tune system
limitations
principles
tuning
under-tune system
Head receivers
Heat coil
Holtzer-Cabot arrester
Hook switch
automatic operation
contact material
design
desk stand hooks
Kellogg
Western Electric
purpose
symbols
wall telephone hooks
Dean
Kellogg
Western Electric
Horseshoe electromagnet
Human ear
Human voice

I

Impedance coils
kind of iron
number of turns
symbols of
types
closed-circuit
open-circuit
toroidal
Inductance vs. capacity
Induction coil
current and voltage ratios
design
functions
use and advantage
Inductive neutrality
Inductive reactance
Insulation of conductors
Introduction to telephony
Iron-clad electromagnet
Iron wire ballast

K

Kellogg
air-gap arrester
desk stand hook
drop and jack
receiver
ringer
transmitter
wall telephone hook

L

Lalande cell
Lamp filament
Le Clanche cell
Lenz law
Line signals
Lines of force, direction of
Loading coils
Lock-out party-line systems