Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 555
SELECTOR GROUNDRESISTANCE TO BALANCE R£ STICKRELAY H CIRCUIT CONTROLLER ON SIGNALK -• LF ♦-Jo -^|l|l|l|l|l|l|lF- SIGNAL BATTERYJ … Fig, 3,741.—Train dispatchers selector system. This is used to indicate to the train engineerwhether he is to proceed on the main line or to take a side track. The indication may bein the form of a disc, a light, a semaphore, or any prescribed signal. When the indicatorsignal is turned from the…
Electrical engineering
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