Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 196
ations, 176 HAWKINS ELECTRICITY as with the single loop armature, the latter must be replacedby one having a great number of loops properly connectedto commutator segments and so arranged that the successiveloops begin the cycle progressively. The difficulties encountered in connecting up… … Fig. 184.—Four separate coils wound on ring to illustrate the action of a Gramme ring arma-ture. If the ring be rotated the electromotive forces induced in adjacent coils will beequal and tend to produce currents in opposite directions; hence, if the inner ends bejoined, the junctions would be at a…
Electrical engineering
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