Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 40
25. — Laboratory StandardWeston Voltmeter. … Fig. 26.— Weston StationT}pe of Ammeter. Weston Speed Tachometers and in relays, Figs. 30, 31. Inthe recording wattmeter a copper disc, Fig. 32, revolves be-tween the poles of a magnet, generating eddy citiTents inthe disc. The disc is equivalent to a loop of wire short-cir-cuited upon itself,…
Electricity · Electrical engineering
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