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 1210
5-21-i-14-20-hJAs the armature moves forward from the position shown,coil 1-7 is short-circuited by the negative brush and coil13-19 by the positive brush. It will thus be seen that a Armature Winding 1175 considerable difference of potential exists between the innerand outer layers of wire, and… … Fig. 524 other, are both in the neutral point of the field at the pointof commutation. This can be considered as an advantageover the previous type where the short-circuited coils aresomewhat separated, and are therefore not commutated atthe exact neutral point. 1176 Steam Engineering In the…
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