Wiring diagrams of electrical apparatus and installations (1913)
McGraw-Hill · New York, McGraw-Hill Book Company · leaf 256
Fig. 407.—Car-counting signal system. A trolley operated switch excites a relay whichpulls the switch around one notch. When entering, the car causes the switch to move onenotch in one direction, and in leaving, it moves the switch one notch in the opposite direction sohat the signals indicate the… … Fig. 408.—Connections for an electrically operated track switch. The magnets are ener-gized by inserting them between the trolley wire and the trolley wheel. By passing the insu-lated section of the trolley with the power on or off, the track magnet can be energized or leftdead, respectively.…
Electric wiring
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