Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 677
different methods of bridging are shown. At Station 1the bell is removed entirely from the circuit when the receiver hook is up ;at Station 2 the bell remains constantly across the circuit in series with thetransmitter and receiver, but when the hook is up it is short-circuited bythe hook and its… … Fig. 37. Series Systems with Microphones and Batteries. Fig. 37 shows the simplest method of using microphone transmitters. Theinstruments are a transmitter, T; an ordinary receiver, R; a vibratingbell, V, and one or two separate batteries at each station. The battery, B,is used only for ringing…
Electrical engineering
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