Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 76
isone of the simplestapplications of theelectromagnet.\\Tien the button Pis pressed, the elec-tric circuit of thebattery is closed anda current flows in at A, through the magnet, over the closed contact C,and out again at B. But no sooner is this current established than theelectromagnet E pulls… … Fig. 64. Telegraphic Relay. 62 ELECTRICITY AND MAGNETISM 53 spring s which supports it. No sooner is the contact made at Cthan the current again begins to flow and the former operation isrepeated. Thus the circuit is automatically made and broken at Cand the hammer H is in consequence set into…
Electrical engineering
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