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 152
negative lead must be given to the brushes. Negative lead is the amount of backward advance of the brushesagainst the direction of the rotation of the armature, measured indegrees from the neutral plane. If the brushes be given positive lead, that is, placed in advance of theneutral plane in the… … IcftllandJ^^ Fig. 412.—Principle of the electric motor as illustrated by experiment showing effect of amagnetic field on a wire carrying an electric current. Let a vertical wire ab be rigidlyattached to a horizontal wire gh, and let the latter be supported by a ring or other metallicsupport as…
Electrical engineering
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