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 475
DTHMOr CURRENT ARC LIGHTING SYSTEM . 455 active wire is reduced to a minimum , and the coils at each side of the plates that are in contact with the brushes are prac tically equal . In this way the electrical efficiency of the ma chine is increased . The commutator plates t are shown as outside the… … Fig . 276 . Fig . 275 . the armature shaft . The shaft 11 is tubular and split at the end portion , and the wires are carried through the same in the usual manner and connected to the respective commutator plates . The commutator plates are upon a cylinder , and insulated , and this cylinder ’ is…
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