Electricians' operating and testing manual; (1910)
Horstmann, Henry C. [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. H. Drake & co · leaf 69
be about midway be-tween two pole pieces. If the brushes are moved aquarter revolution forward or back the directions ofcurrent will be reversed. Armatures for such ma-chines may be wound just as for bi-polar fields but aform of winding as indicated in Figure 50 is prefer-able. Types of Dynamos 67… … Figure 49 in two and the wires laid out flat. W, W representsthe commutator sections and N, S, the poles as inFigure 49.
Electrical engineering · Electric testing
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