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 531
ctively protected fromaccumulations of snow, ice, dirt, etc., which tend to cause seriousground and excessive leakage. This objection is almost entirely 2,622 HAWKINS ELECTRICITY eliminated in the protected third rail system which has been adopted onthe tracks of the New York Central Railway, the… … PLAN Figs. 3,695 to 3,697.—Details of protected bottom contact third rail. It consists of a series ofiron bracket carried on ties, to the tongued vertical face of which are clamped non-charringmoisture proof insulating blocks which loosely embrace the head of the rail. Intermediatebetween the…
Electrical engineering
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