A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 118
comparatively small cur-rent strength, i. e., but of few amperes, is con.verted or transformed into a current of compar.atively small electromotive force and large cur-rent strength. For advantages of this conversionsee Electricity, Distribution of, by AlternatingCurrents, Inverted induction coils… … Fig. 145. Medical Induction Coil. Coil, Induction, Microphone — —An induction coil, in which the variations in thecircuit of the primary are obtained by meansof microphone contacts. (See Microphone^ The carbon-button telephone transmitter is amicrophone in its action, its electric resistancevarying…
Electricity · Electrical engineering
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