Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 387
as the car equipments will permit.There is of course no advantage in having a lower volt-age at light loads. In order to prevent the brushes from wearing groovesin the commutator, a slight oscillatory motion is impartedto the shaft, thus greatly prolonging the life of the com-mutator and keeping… … Fig. ISO. Brush-Yoke and Brush-Holders Used on Direct Current Endof 500 K. W, Allis-Chalmers Rotary Converters. Hunting. The hunting of rotary conYerters has al-ready been alluded to, but not enlarged upon. A rotaryconverter, and the generator supplying it with currentmay be likened in their speed…
Electricity
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