Discussion on “direct-current and alternating-current mill motors for auxiliary drives” (Wiley), Pittsburgh, Pa. April 25, 1912. (see proceedings for May, 1912)

Alexander C. Lanier: Mr. Wiley's paper has brought out the principal demands made upon motors in mill and crane service and my remarks will be limited to direct-current mDtors suitable for such applications. Commutation is always a factor of first importance in the direct-current motor; service conditions met in mill work are much more severe than in the ordinary industrial application. During the operating cycle the load usually varies between wide limits, and momentary peaks may reach three or four times the one hour rated load.