A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 313
1 2 Fg- 325- 3 4 Spragues Double-Contact Key. pieces, I, 2, 3 and 4, serve to make contacts withapparatus used in connection with the key. The battery circuit is connected to I and 2,and the galvanometer to 3 and 4, so that the bat-tery circuit is closed first, and the galvanometerafterwards. This… … Spragues double-contact key is shown in Fig.325. On depressing K, the contacts c, c, are firstclosed and afterwards contacts at c, c. Metallic Fig. 326. Lamberts Double- Contact Key. In Thomsons method for the determination ofelectrostatic capacity, the capacity of the cableis compared with that of…
Electricity · Electrical engineering
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