The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting (1894)
Martin, Thomas Commerford, 1856-1924, Tesla, Nikola, 1856-1943 · New York : The Electrical Engineer · leaf 432
d those of the op])osite sign over the other. The disadvan-tages of this arrangement, which would seem to result from theemployment of sliding contacts, are in reality very slight, inas-much as the electromotive force of the secondaries may be madeexceedingly low, so that sparking at the brushes is… … Fig. 223. and revolving armatures of two induction devices. The arma-tures o p are preferably mounted on tJie same sliaft, and are ad-justed relatively to one another in such manner that w hen thrself-induction in one branch, as c, is maximum, in tlie other branchoit is minimum. Tlic armatures are…
Electric currents, Alternating · Electrical engineering
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