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
in contact with the lower•contact. When the lever H, is so moved as to have theprojection C, away from both steps, the lever L,is pressed by its spring against the upper contact. The battery terminals are connected with thecondenser terminals when the lever L, is touchingthe lower contact, but when… … 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…
Electricity · Electrical engineering
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