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 272
PIVOT MAGNETCORES … CONTACTBREAKER Figs. 3,231 to 3,233.—Detail showing part of the elementary heavy duty high voltage bellillustrated in fig. 3,230, and illustrating the action of the condenser in preventing spark-ing. In fig. 3,231, current has just begun to flow, to energize the magnets. Fig. 3,232shows the circuit…
Electrical engineering
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