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 393
s in the windings under the upper N and S-polesare opposed to each otherand flow to the externalcircuit by the + brush 1and back to this halfof the armature by —brushes 3 and 4. At thesame instant the opposedcurrents in the lowerwindings flow to the ex-ternal circuit by -|- brush 2 and return to… … Fig. 359.—Direction of Current Through the WindinfiS of a Ring Armature Rotating in a Four-Pole Field. the neutral space. In this form of winding there is no differ-ence of potential between the + brushes, so that they are con-nected in parallel, as are also the negative brushes, and thento the…
Electricity · Magnetism
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