Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 102
egative,contacts of a machine. 314 HAWKINS ELECTRICITY This value is not materially affected by placing a number of brushesin parallel or by using several sets, as in the case of multipolar machines,as such arrangement merely reduces the current density, and sincethe contact resistance varies in… … Fig. 341—Western Electric brush gear. The brush holders carry carbon brushes and are sodesigned that the brushes may be firmly clamped in position and also be capable of inde-pendent adjustment. Any brush can be removed while the machine is in operation with-out distrubing the others and without…
Electrical engineering
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