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Patent model for Bell DC generator, 1876. Magnetized octagon steel bar 7.5" long with revolving wheel. Contact springs in center of bar. Two binding posts. See US Patent 181553, Generating Electrical ...
An armature core for a motor or generator. Steel axle on which is mounted a drum-type assembly of many slotted thin laminated plates separated by steel U-channels and retained in place by plastic ...
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