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 87
nditions of opera-tion require that there be: 1. Adequate insulation; It is necessary to have good insulation between each segment, and aspecially good insulation between the segments and the hub or sleeve onwhich they are mounted; also between the segments and end clamps.The insulating material… … Fig. 326—Front view of Western Electric Commutator for bar wound armature. This com-mutator is made of hard drawn copper and insulated throughout, ventilating spaces beingprovided near the shaft. 2. Rigidity against centrifugal force; Since the segments are subject to centrifugal force, they must…
Electrical engineering
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