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 116
uitcurrent; 2, an insulatedarmature of very lightconstruction and pivotedso as to vibrate between acontact and an insulatedstop as shown; 3, an ad-justable spring to holdarmature against stopwhen not attracted by themagnet; 4, leads connecting the magnet winding to the maincircuit, and 5, leads… … 2.210 HAWKINS ELECTRICITY
Electrical engineering
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