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 133
re several ways of makingthese coils. A former may be prepared, as shown in the figure, with a board havinginserted four pins, and having attached two blocks at the ends carrying horizontal pinsas shown. Around the several pins, the coil is wound to the required number of turnsand taped. This coil…
Electrical engineering
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