. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . ow suppose the disc to In* >ubdi\ ided .-pirally, as UmrOLAR GENERATORS. 473 indicated by the full or dotted lines, Fig. 205. The difference ofpotential between a point on the shaft and a point on the peri-phery will remain nnclmnged, in sign as well as in amount. Theonly difference will l)e that the resistance of the disc Avill be aug-mented and that there will be a greater fall of potential from apoint on the shaft to a point on the periphery wh
. The inventions : researches and writing of Nikola Tesla, with special reference to his work in polyphase currents and high potential lighting . ow suppose the disc to In* >ubdi\ ided .-pirally, as UmrOLAR GENERATORS. 473 indicated by the full or dotted lines, Fig. 205. The difference ofpotential between a point on the shaft and a point on the peri-phery will remain nnclmnged, in sign as well as in amount. Theonly difference will l)e that the resistance of the disc Avill be aug-mented and that there will be a greater fall of potential from apoint on the shaft to a point on the periphery when the same cur-rent is traversing the external circuit. But since the current isforced to follow the lines of subdivision, we see that it will tendeither to energize or de-energize the field, and this will depend,other things being equal, upon the direction of the lines of sub-division. If the subdivision be as indicated by the full lines inFig. 295, it is evident that if the current is of the same directionas before, that is, from centre to periphery, its effect will be tostrengthen the field magnet; whereas, if the subdivision l)eas in-. FiG. 2i».». Fiual lieldcoils and poles may bi omitttd and tlu macliim- may lie made toconsist only (tf a cylinder oi of two 5, it is mctie convenient to interpose one or more turns 474 INVENTIONS OF NIKOLA TESLA. between the disc aiul the contact ring on the peripherv, as ilhis-trated
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Keywords: ., bookcentury1800, bookdecade1890, bookidinventionsre, bookyear1894
