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 399
et is built up of two circular parts h h , formed with annular grooves i , which , when the two parts are brought together , form a space for the reception of the ener gizing coil < j . The hubs of the cores are trued off , so as to fit closely against one another , while the outer portions or… … Fro . 200 . but there must exist between them and the radial portions of the conductor d certain relation , which will be understood by reference to Fig . 207 in which n n represent the projections or points on one face of the core of the field , and s s the points of the other face . The conductor…
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