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 200
struction, in order that these necessary partsmay be retained in proper co-relation, and the machine operateproperly there must also be included: 4. Frame; 5. Bed plate; 6. Pulley. Field Magnets.—The early forms of alternator were builtwith permanently magnetized steel magnets, but these werelater… … Figs. 1,448 and 1,449.—Westinghouse laminated hub and laminated pole piece for revolvingfield having squirrel cage winding. Thin steel is used for the laminations of both huband pole piece; these are assembled and firmly riveted together under hydraulic pressureThe laminations are of the same…
Electrical engineering
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