International Library of Technology · Scranton, International Textbook Co. · leaf 28
e brushto the toe, or vice versa, without first flowing up anddown the full length of the brush, so that the short-circuited 10 DYNAMOS AND MOTORS. 13 coil cannot generate so large a current, although the flow ofthe current in the main circuit of armature and lamps isnot interrupted. On account of… … Fig. 6. carbon or some metal whose specific resistance is high enoughto reduce the current in the short-circuited coil, but not highenough to offer any serious impediment to the flow of themain current. Copper brushes are never made solid; theyare made flexible, in one way or another, so that they…
Electrical engineering
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