The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 194
r are in action simultaneously, each setcoming into action as the other set passes out. Fourbrushes are employed in an eight-coil Brush dynamo,and the contacts are made in such a manner that sixcoils are in action simultaneously. Location of the Armatures Magnetic Poles.—In accord-ance with the… … Fig. 74. is comparatively weak, the cores most effective polaritybeing that induced by the currents circulating throughthe armatures coils, the tendency of which is to inducesimilar poles in proximity to those of the field-magnetswliich, by mutual repulsion, are deflected into the posi-tion…
Electricity · Magnetism
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