A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 119
oi. A rapidly interrupted battery current, sentthrough a coil of wire called the primary coil,induces alternating currents in a coil of Wire calledthe secondary coil. As heretofore made, the primary coil consists ofa few turns of a thick wire, and the secondarycoil of many turns, often thousands,… … Fig. 142. Ruhmkorff Coil. of a bundle of soft iron wires, has its ends broughtout as shown at f, f. The fine wire, forming thesecondary coil, is wrapped around an insulatedcylinder of vulcanite, or glass, surrounding theprimary coil. This wire is very thin, and in somecoils is over one hundred…
Electricity · Electrical engineering
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