. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . Fi(i. r>. Fui. (ill. i-c\ (iliitioii of the jiimaturc the poles of ilic ring arc shitted oncearound itN periphery, and, eneli Icvolution producing like ellccts,a rapid whiiling ot the poles in Imrmouy with the rotation ot thearnuitlire is the |-e>ult. II the eoiineetions of eithel- one i^^ till-ciiciiits ill the ling iire reNcrsed, the shifting of the poles is iiukUto progress in the opposite direction, hut tin- opeiiitioii is ideuti- 14 /\]7:\
. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . Fi(i. r>. Fui. (ill. i-c\ (iliitioii of the jiimaturc the poles of ilic ring arc shitted oncearound itN periphery, and, eneli Icvolution producing like ellccts,a rapid whiiling ot the poles in Imrmouy with the rotation ot thearnuitlire is the |-e>ult. II the eoiineetions of eithel- one i^^ till-ciiciiits ill the ling iire reNcrsed, the shifting of the poles is iiukUto progress in the opposite direction, hut tin- opeiiitioii is ideuti- 14 /\]7:\T/r(.:i(l i\i iisiiiiT tuur wires, with like wires may he used, one foi-iiiiiiir a <-iimi(in return for liothoirouits. Tills rotation or whirlinir f the \^iAv> niani tests itself in a seriesof curious phenoMiena. If a delicately pivoted disc of steel orothei- niHifnetic metal is a|)i>roaclied to the rin*; it is set in rapidrotatiou, the direction of rotation varyiu*; with the position of. till Ior instance, noting tiie directictn outside of the riniJit will he found that inside the rin*; it turns in an op)>osite direc-tiroaches, it iiuluces an op])osite pole in the nearest point on thedisc, and an attraction is pi-oduced upon that ]H»int; owiuijto this,as the pole is shifted furtlicM- away from the disc a tangential ]>idlis exerted upon the same, ami the action being constantly repeat-ed, a more or less rapid rotation of the disc is the result. As thepull is exerted mainly uj)on that part which is nearest to thering, the rotation outside and inside, oi-right and left, rispectively,is in opposite directions. Fig. ;•. When placed symmetricallyto the ring, the pull on the op]>osite sides of the disc heing Ilpial,no rotation results. The action is hased on the magm-tic inertia«»f iron ; for this reason a disc of iiar
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Keywords: ., bookcentury1800, bookdecade1890, bookidinventionsre, bookyear1894
