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 395
ed with a large number of pole - pieces d . Owing to the very large number and small size of the poles and the spaces between them , the field coils are applied by wind ing an insulated conductor f zigzag through the grooves , as shown in Fig . 203 , carrying the wire around the annulus to form as… … j , turned down , except at its edges , to form a trough - like recep tacle for a mass of fine annealed iron wires k , which are wound in the groove to form the core proper for the armature - coils . Pins l are set in the sides of the ring , r and the coils m are wound over the periphery of the…
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