Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 625
Fig. 306. Fig. 397. same direction by means of a commutator, D. In the construc-tion shown in fig. 397, the exterior bobbin is of soft iron. Tliecommutator D may be applied to alternate the currents in thecoil C, those in the coil B being in the same direction, collected JABLOCHKOFFS SPHERICAL…
Electrical engineering
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