Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 620
Fig. 453. Fig. 454. frequencies with safe speeds it is necessary to have field magnetswith multiple poles. Fig. 454 shows a multipolar alternating cur-rent dynamo. 692. Simple Direct Current Dynamo. To obtain a current con-stant in direction, a commutator is used instead of collector rings.Fig. 455…
Physics
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