The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 320
mpulse for each motionof the key. It is employed for telegraphing without a line battery,a polarized relay being used. In one very simple form a key ismounted on a base with a permanent magnet and connected to thearmature, so that when the key is pressed downwards it draws thearmature away from the… … Fig. 208. Siemens Magneto-electric Key. In Siemens & Halskes key an H armature E is pivoted betweenthe poles N S, of a powerful compound horseshoe magnet, G G.It is wound with fine wire and a key handle H is provided forworking it. In its normal position the handle is drawn upward,and the end s…
Electricity
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