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 103
ure in pounds on the commutator, and S, the rimvelocity of the commutator in feet per minute. The losses due to contact resistance and brush friction are very liableto be greatly increased above the values that may be obtained by thepreceding methods, if the commutator and brushes are dirty and…
Electrical engineering
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