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
set 180° apart, so that one rests on one-half of thecommutator, while the otherrests on the opposite half.These brushes thus make theconnections for the currentwith the external circuit.The brushes are set so thatthe connections with the ex-ternal circuit are reversed,just at the instant in… … Fig. 455. 6o2 ELECTROMAGNETIC INDUCTION. as represented in Fig. 456. The above is a simple direct cur-rent (D. C.) dynamo with a two-part commutator. In Fig. 457we have two coils at right angles to each other, and so joined to a
Physics
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