Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 423
and through the intervention of a leverand a most ingenious annular clutch surrounding the rod of theupper carbon like a washer, the upper carbon is lifted from thelower and the arc is established. As the carbons burn away the 402 THE ELECTBIG LIGHT, arc has a tendency to become longer and its… … Fig. 243. Fig. 44. shorten the arc until the proper strength of the current isrestored, when the rising of the plunger once more holds thecarbon in position. Each of the bobbins of the controlling magnet is wound with THE BRUSH AEO LAMP. 403 two distinct coils of wire, tlie first consisting of a…
Electrical engineering
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