Electricians' operating and testing manual; a hand book for men in charge of electrical apparatus, repair men, trouble men, lamp trimmers, and electricians generally (1916)
Horstmann, Henry Charles, Tousley, Victor Hugo, 1875- joint author · Chicago, F.J. Drake & co · leaf 71
Figure 49 in two and the wires laid out flat. W, W representsthe commutator sections and N, S, the poles as inFigure 49. … Figure 50 A view of a finished armature is given in Figure 51. Alternating currents to be available for lighting purposes must have quite a high frequency; 60 cycles 68 Operating and Testing per second or 7200 alternations per minute beingabout the lowest frequency that can be used for arcor…
Electrical engineering · Electric testing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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