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 488
LINL.SWITCH … Fig. 3,629.—Diagram of connections of Westinghouse auxiliary contactor equipment. Thewear and tear on drum controllers may be reduced and life of the contacts increased by theuse of auxiliary contactor equipments. A contactor equipment consists of a powerfulpneumatically operated switch, or…
Electrical engineering
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