Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 580
separate bars of copper fixed round the periphery of the axes,while above and below are the contact brushes w^hich touch thehighest and lowest pieces of the commutator respectively. Inthe diagram, fig. 358, the ring is inwrapped by a continuoushelix of twelve turns ; each one of which is connected… … Fi(j. 359. ring are moving from S toward N, while those of the lowerhalf are moving from N toward S. Direct currents will begenerated in all the coils that are on the right-hand of the diame-ter, and inverse currents in all the coils on the left. The smallarrows show the directions of these…
Electrical engineering
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