The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 518
19. yj/is a base plate of brass, y^ is a brass lever, mounted on anarbor G carried between adjustable set screws D. C is the anvilwhere contact is made by depressing the key by the finger piece Bof ebonite. E, F^ are adjusting screws for regulating the vertical STANDARD EIvECTRICAL DICTIONARY. 513… … Fig. 319. Morse Telegraph Key. In the United States the simplest disposition of apparatus isgenerally used. The main line is kept on closed circuit. In it maybe included a large number of relays at stations all along the line,each with its own local circuit. There may be fifty of such…
Electricity
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