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 199
Fig. 463.—A quick break knife switch of the single throw, single break, one pole, type.The contact blade is held between the jaws by their clamping friction until the handlecompresses the spring sufficiently to force the blade out. As soon as it breaks contact withthe jaws, the spring expands and… … Figs. 464 and 465.—Snap switch; views showing switch with cover on, and exposed to showmechanism. The switch is provided with indicating dial which registers on and offpositions. Fig. 466.—Gas Engine snap switch. The first snap makes connection so that igniter is runfrom storage battery; second…
Electrical engineering
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