. Le invenzioni : ricerche e scritture di Nikola Tesla, con particolare riferimento al suo lavoro in correnti polifase e illuminazione ad alto potenziale. Luzione dell'ideafondamentale del tiehl magnetico rotante. La frequenza degli higli esibisce in-cluded il sig. Teslas prima macliiies e (lisriii>tive discliart^c coilsand high fre(|uency Transformers, che ha usato nelle sue investi-azioni e alcuni (»f wliicli sono Iefen-cd a nel suo pai)ers pi-intedin questo vohime. Fig. 2!>7 mostra una vista di una parte delle esposizioni contaiiiii;- temotore a|)paratus. Tra questi è mostrato in un a hirge i-ing in-ten (Ud to

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. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . lution of the fundamental ideaof the rotating magnetic tiehl. The higli frequency exhibit in-cluded Mr. Teslas earlier macliiiies and (lisriii>tive discliart^c coilsand high fre(|uency transformers, which he used in his investi-gations and some (»f wliicli are Iefen-cd to in his pai)ers pi-intedin this vohime. Fig. 2!>7 shows a view of part of the exhibits contaiiiiiii;- themotor a|)paratus. Among these is shown at a a hirge i-ing in-ten(Ud to exhibit the i)henomena (»f tlie rotating magnetic field.The field ])ro(hiced was very p(»werful and exhibited strikingeffects, revolving c(»pptr l)alls and eggs and bodies of variousKha|>es at considerabU distances and at great spi*eds. This ringwas wound for tw(»-phase circuits, an<l the winding was so dis-tributed that a |)ractically uniform tiehl was obtained. This riui;was ])repared for Mr. Teslas exhibit l»y Mr. (. F.Scott, ehc-trician of the Westinghouse lOleetrie and Mannlaeturini; (ompanv. 478 [yvEynoxs of xrkola tesla.. PERSONAL EXHIBIT AT THE WORLDS FAIR. 4T9 A smaller riiiir, shown at b, was arrautred like the one exhibitedat A but designed especially to exhibit the rotation of anarmature in a rotating field. In connection with these tworings there was an interesting exhibit shown by Mr. Tesla whichconsisted of a magnet Avith a coil, the magnet being arranged torotate in bearings. With this magnet he first demonstrated theidentity between a rotating field and a rotating magnet; the latter, when rotating, exhibited the same phenomena as the nngs whenthey were energized by currents of differing pha, se. Anotherprominent exhibit was a model illustrated at c which is a two-phase motor, as well as an induction motor and transformer. Itconsists of a large outer ring of laminated iron wound withtwo superimposed, separated windings which can be connectedin a yariet

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1890
• bookidinventionsre
• bookyear1894