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 494
Pigs 3,638 and 3,639.—Westmghouse blow out coil. Fig. 3,638 view with side of box cut away;tig. d,od9, complete with pole piece. Each blow out coil consists of a number of turn ofcopper strap enclosed in an insulating box similar to the switch box. Each coil is secureto the base plate of the switch… … *ig. 3,640.—Westinghouse switch group, covers removed, front view. The most importantitem of a control equipment is the switch group. This consists of a cast and malleable ironframe upon which the various switches are mounted, completely enclosed by three easilyremovable sheet iron covers. A blow…
Electrical engineering
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