Principles of Electricity Applied to Telephone and Telegraph Work: A Training Course Text Prepared for Employees of the Long Lines Department, American Telephone and Telegraph Company |
Contents
Tables | 2 |
ELEMENTARY DEFINITIONS AND OHMS | 5 |
Resistance of Various Metal Conductors | 9 |
23 other sections not shown
Common terms and phrases
adjusted alternating current amperes amplifier apparatus armature attenuation balance band battery bridge transformer capacity carrier current carrier frequency condenser conductors connected contacts cord circuit crosstalk cuit current flow current values curve cycles designed device direct current distant end duplex effect electrical electromotive force energy equation filament FILTER grid illustrated by Figure impedance impedance bridge increase induced E.M.F. inductance insulation jacks length line circuit lines of force loading coil long distance loop magnetic field meter miles non-loaded Ohm's Law ohms open wire operation output phantom plate pole quency R₁ ratio reactance receiving relay repeating coil represented resistance shown in Figure shunt signal sine wave standard switch switchboard tance tele telephone circuit telephone repeater terminals testboard tion toll line transmitting transposition unit vacuum tube vector voice current voice frequency voltage voltmeter volts west station Wheatstone bridge winding zero