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 458
ace contact system requires no poles or over-head wires and leaves yards and buildings free of all obstructions.The current h supplied to the motors through contact buttons ELECTRIC RAILWAYS 2,549 which are connected to a feeder cable laid along the track,through electromagnetic switches; the… … Figs. 3,507 and 3,508.—Construction details of third rail and contact shoe as used on the k Manhattan Elevated Railway, New York City. As shown, the shoe is attached to the coilspring seat of the truck, and the shoe proper, which is suspended by two links from theyoke, which is in turn bolted to…
Electrical engineering
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