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 446
red lamps R to ground. Plunger is thenraised connecting contacts TM. Current then flows from trolley throughcontacts TM, magnet A, white lamps W, contacts WSM — L, —line, con- RAILWAY TURNOUTS. 433 tacts in box at south switch, L — WSM, contacts WSB — RS, through thered lights to ground. This… … Fig. 2. circuit at WSM — L, this in turn de-energizes magnet A/, its plunger dropsto its normal position, breaking the circuit at TM, and the signal is off.The same action in a reverse direction takes place when a car passes out ofthe south siding going north. Another method, a manual one, is in…
Electrical engineering
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