American Telephone Practice |
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Common terms and phrases
alternating currents annunciator answering plug apparatus armature arranged battery bell binding posts block brass bridge cable call-bell calling subscriber capacity carbon cause cell central office charge condenser conductors conduit connected construction copper wire cord circuit core cross-arm desired diameter diaphragm distributing board disturbing wire ducts Electric electrode electrolyte electromagnet electromagnetic induction electromotive force exchange form the terminals galvanometer ground hard rubber hook inches induction coil inserted instrument insulated iron lamp lead lever line circuit line wire listening key local battery manner metallic circuit mounted multiple board normal ohms operator ordinary pair pass placed plate polarity pole pole-pieces portion position ratchet-wheel receiver relay repeating coil resistance rheostat ring ringer screw secondary self-induction sheath shown in Fig shunt shutter side signal sleeve strand soldered spring spring-jack strip subscriber's station switch switch-board tion transmitter trunk line usually vibration winding zinc