Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 422
Fig. 241. Fig. 242. and the circuit is thereby completed; the effect of this is tocause a soft iron plunger to be drawn to a more or less extentwithin a hollow coil, and through the intervention of a leverand a most ingenious annular clutch surrounding the rod of theupper carbon like a washer, the…
Electrical engineering
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