The U.S. Patents of Nikola Tesla

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, John Gillespie. electro-magnetic motor, the combi­ nation, with armature, plurality of field orenergizing coils included, respectively, in main circuits adapted produce given 25 difference phase and supplemental sec­ ondary circuits adapted produce inter­ mediate difference phase, set forth. 2. NIKOLA TESLA.416,195 3 of pair poles, B', coincides closely with the maximum effect the armature, which lags behind the corresponding condi­ tion poles B. Witnesses: R. . In using expressions herein indicate a coincidence the magnetic phases effects io one set field-magnets with those set up in the armature the other refer only to approximate results; but this course will be understood. S There are many other ways carrying ont this invention, but they all involve the same broad principle construction and operation. STONEY, Jr. What claim is— 15 alternating-current motor, the com­ bination, with armature wound with closed coils, main and supplemental field magnets or poles, one set which adapted ex­ hibit their maximum magnetic effect simul­ taneously with that set the armature 20 by the action the other, set forth