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 196
Pigs. 455 to 457.—Adams single throw knife switches without fuse connections. Fig. 455,single pole switch; fig. 456, double-pole switch; fig. 457, three-pole switch. Pigs. 458 to 460.—Adams single throw knife switches with fuse connections at the handleend. Fig. 458, single pole switch; fig. 459,…
Electrical engineering
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