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
the lever, S, has fully returned to its normal position, INTERCOMMUNICATING SYSTEMS. 673 a second dog, J, is provided which is pressed by a spring so as to occupy aposition under the pin,p, carried on the pawl, F, thus holding it out ofengagement with the ratchet-Avheel until the rotation of the… … Fig. 53. Common Signaling Battery System; Individual TalkingBatteries. In Fig. 53 are shown the circuits of a four-station system using one com-mon battery, CB, for ringing up the various stations, each station havingan ordinary vibrating bell, C. The circuits of Stations 1 and 4 are shown infull,…
Electrical engineering
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