A dictionary of electrical words, terms and phrases (1896)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W.J. Johnston company · leaf 314
key for sending an electric impulseinto a line, so arranged that a coil of wire onan armature connected with the key lever is,by the movements of the key, moved towardor from the poles of a permanent magnet, themovements of the key thus producing thecurrents sent into the line. Key, Plug A simple… … _j— ur Fig. 327. Plug Key. Key, Reversing A key inserted in the circuit of a galvanometer for obtainingdeflections of the needle on either side of thegalvanometer scale. A form of reversing key is shown in Fig. 328.The galvanometer terminals are connected to thebinding posts 2 and 3, and the…
Electricity · Electrical engineering
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