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 682
e returned to itwhen the original calling party leaves the telephone. If all switch arms, s,are on the home buttons it will be found that the circuits of all instru-ments are open and no bell will ring, no matter what generator is turned.If Station 2 desires to call Station 1 it will be necessary… … FiG. 47. Common Signaling-Battery System. 670 TELEPHONY. generators and polarized bells. A battery is used at each station for oper-ating the transmitter. This is probably the best arrangement of batteriesfor such a system where vibrating bells are used. This system requires onemore wire than that…
Electrical engineering
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