Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 376
Fig. 336.—Laminated Armature Core. The thickness of the discs is ruaguified to show theeddy currents. ARMATURES. 357 … Fig. 337.—Commutator forDirect Current Dynamoor Motor. and formed collar made of sheet mica, when it is ready forthe reception of the bars which are forged with grooves inthe ends, as in Fig. 339. The projecting insulated tongue onthe hub fits into a correspondinggroove in a bar, and when all…
Electricity · Magnetism
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