Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1097
f brush-holders. The end-on brushes are moregenerally used in modern practice, because their contactsurface area is not increased or decreased by wear. Conse-quently the brushes always remain in a diametrically oppo-site position. With the old style brush-holding device,where the brushes rest on… … Fig. 454 this type of brush, and Figs. 451 and 452 show the incor-rect setting. By remembering that each one of the commutator barsis the end of a coil, and then just mentally tracing the cur-rent through the coils from one brush to the other, we canreadily understand what the results are when the…
