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 686
B, for ringing up the various stations, each station havingan ordinary vibrating bell, C. The circuits of Stations 1 and 4 are shown infull, while those of the intermediate stations, being exactly the same, arepartially omitted. It will be noticed that the switch lever, S, at eachstation is… … System having Common Talking and Signaling Battery. 674 TELEPHONY. that station which does hear the same number in the manner pre-viously described, by means of tbe wire, e. In this common-battery callsystem two additional wires are run, one being termed the call wire andthe other the common…
Electrical engineering
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