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 173
on Coils.—1. Most ignition in-duction coils or spark coils as they are called, have terminalsmarked battery, ground, etc., and to short circuit the timer *NOTE.—These values are correct for effective sinusiodal voltages. INDUCTION COILS 153 for the purpose of testing the vibrator, it is only…
Electrical engineering
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