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 88
s firmly in position, for if a segment should rise out ofits place through centrifugal force, it would disturb the action of thebrush and cause sparking. 300 HAWKINS ELECTRICITY 3. Provision for wear. The segments should be of considerable radial depth, so that the com-mutator may be turned down… … Fig. 327—Sectional view of a General Electric commutator. The segments are of rolled orforged copper and are separated by soft mica insulating sheets. This mica must weardown evenly with the copper, hence its consistency is important. The segments arewedge shaped so that when drawn radially inward…
Electrical engineering
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