The inventions, researches and writings of Nikola Tesla : with special reference to his work in polyphase currents and high potential lighting (1894)
Martin, Thomas C, Tesla, Nikola · The Electrical Engineer · leaf 474
454 INVENTIONS OF NIKOLA TESLA . that the total lengths of the crossing wires at the two sides of the plane x x are practically equal . To equalize further the armature coils at both sides of the plates that are in contact with the brushes , the winding and con necting up is effected in the… … Fio . 274 . which are thoroughly insulated from each other . Each of these two parts is composed of three separated groups of coils . The first group of coils of the first part of wire being wound and connected to the commutator - bars in the usual manner , this group is insulated and the second…
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