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- · New York, T. Audel · leaf 81
shaft operates the short circuiting arrangement in sizes up to about 2f> horse power.The external resistance or slip ring armature, fig. 1,773, is similar in construction to fig.1,778, with the exception that slip rings are provided because of the external locationof the resistance. These rings… … ABC
Electrical engineering
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