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
_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… … Fig. 328. Reversing Key. current flows m one direction and on depressingK, it flows in the opposite direction. Clamps,operated by handles, are provided so as to closeeither of the keys permanently, if so desired. Key, Reversing, of Quadruplex Tele-graphic System A key employed to reverse the…
Electricity · Electrical engineering
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