. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . ^wy^,tiiy^, - ,. Fio. 246. Fui. 247. The mechanical advantages will be better underst(»(Ml j»v re-ferring to the accom))anying diagrams, in which Fig. 24(5 is acentral longitudinal section of the end of a shaft with the im-proved commutator carried thereon. Fig. 247 is a view of theinner or bearing face of the collector. Fig. 248 is an end viewfrom the armature side of a modified form of commutAtor. Figs. ANTL8PAKKIN0 BRUSHES AND COMMUTATORS.

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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 . ^wy^,tiiy^, - ,. Fio. 246. Fui. 247. The mechanical advantages will be better underst(»(Ml j»v re-ferring to the accom))anying diagrams, in which Fig. 24(5 is acentral longitudinal section of the end of a shaft with the im-proved commutator carried thereon. Fig. 247 is a view of theinner or bearing face of the collector. Fig. 248 is an end viewfrom the armature side of a modified form of commutAtor. Figs. ANTL8PAKKIN0 BRUSHES AND COMMUTATORS. 435 249 and 250 are views of details of Fig. 248. Fig. 251 is a longi-tudinal central section of another modification, and Fig. 252 is asectional view of the same, a is the end of the armature-shaftof a dynamo-electric machine or motor, a is a sleeve of insu-lating material around the shaft, secured in place by a screw, a.

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Keywords: ., bookcentury1800, bookdecade1890, bookidinventionsre, bookyear1894