. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . 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 view
. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . 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, Fig. 248 Fig. 249. Fig. 250. The commutator proper is in the form of a disc which is madeup of four segments d d g g, similar to those shown in Fig. of these segments, as d d, are of metal and are in electricalconnection with the ends of the coils on the armature. Theother two segments are of insulating material. The segments areheld in place by a band, b, of insulating material. The disc isheld in place by friction or by screws, </ g\ Fig. 248, whichsecure the disc firmly to the sleeve a. The collector is made in the same form as the coumiutator. Itis composed of the two metallic segments e e and the two insu-lating segments f f, bound together by a band, c. The metallicsegments e e are of the same or practically the same width orextent as the insulating segments or sj)aces of the collector is secured to a sleeve, h, Ijy screws g y, and the sleeveis arranged to tui-n fi-eely on the shaft a. The end of the sleeveb is closed by a phite, t\ upon which presses a
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Keywords: ., bookcentury1800, bookdecade1890, bookidinventionsre, bookyear1894
