Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 365
l benoted in the armatures depicted inFigs. 324, 325, and 329. An eight-coil ring armature is depicted inFig. 324, rotating against the handsof a clock in a bipolar field. Theconnections are the same as thosegiven above. The direction of cur-rent in the two halves of the ringis indicated by arrows… … Fig. 323.—Four-Coil Gramme• Ring Direct CurrentArmature. DYNAMO ELECTRIC MACHINES. 347 lower or negative brush, circulating up again through eachhalf of the armature. The windings in the halves of thearmature are in parallel with the brushes. As each coil passesfrom under tlie influence of the…
Electricity · Magnetism
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