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A Telephone Set for Explosive Atmospheres
Board of The C5 Carrier Terminal
G W Cowley
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adjustment allotter amplifier apparatus armature arrangement autotransformer band battery Bell System bridge cable capacitance capacitors carrier systems central office characteristics circuit clutch coaxial coaxial cable coil components condenser conductors connected cord circuits cords core loss cork roll Crisfield cuit curve Development dial dielectric direct current effect equipment film filter frequency grid impedance increase indicated inductance installed insulation Laboratories lamp lator lithopone magnetic measuring ment microphone modulation mounted noise open-wire line operation oscillator oscillograph output oxide panel pilot channel plate position potential pulsing quency radio range reactance receiving Record rectifier relay release repeater resistance ringing rubber schematic selector shown in Figure shunt signal silicon carbide switch switchboard telegraph temperature terminal test set thermistor tion toll trans transformer transmission transmitter trunk tube unit vacuum tubes variations varistor voice-frequency voltage volts wire zinc oxide