Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 269
ted immediately preceding the interruption. Toavoid accidents which may occur through the physicaldisability of a motorman, master controllers are sometimesarranged with a button on the handle which must bekept down in order to keep the auxiliary control circuitclosed. The multiple-unit control… … mmm ^Mim 258 DYNAMO ELECTRIC MACHINERY. operated electrically by a master controller from a storagebattery. 106. Motors for Automobiles. — For electric automo-biles the series-wound motor is invariably employed. Astorage battery of 40 or 44 cells is the customary sourceof power for these motors.…
Electric machinery
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