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 529
ils in paved streets. Conduit or Underground Trolley Systems.—The kindof construction employed largely depends upon the local con-ditions and requirements. In general it consists of a series of 2,620 HAWKINS ELECTRICITY iron yoke embedded in a concrete sub-surface structure whichforms the conduit… … ////////////////////////////A, Pig. 3,693.—Yoke construction for conduit or underground trolley, as installed on MetropolitanRailways, New York City. These yokes were placed 5 feet apart in an excavation madethrough the street. The track rails A, A, and the slot rails B, B, were then laid on…
Electrical engineering
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