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 263
PAWLS MOVING CONTACTLEAVING PAWLS … CLOSED Figs. 3,213 to 3,216.—Detail of electrical circuit maintainer showing progressively its action.Fig. 3,213 shows the moving contact engaged by the pawls. In Fig. 3,214, the solenoidhas pulled the moving contact downward to the line and line position, that is to say,to a point where the edge…
Electrical engineering
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