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 92
eld - magnet of a motor , having , say , eight poles or inwardly - projecting cores b and c . The cores b form one set of magnets and are energized by coils d . The cores c , forming the other set are energized by coils e , and the coils are connected , preferably , in series with one another , in… … Fro . 59 . Fro . 58 . or oxidized iron wire wrapped or wound on the coils in the man ner indicated so as to form a closed magnetic circuit around the coils and between the same and the magnetic cores c . Be tween the pole pieces or cores b c is mounted the armature k , which , as is usual in this…
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