[Electric engineering.] . d by the regulatorand at the same time the brushes are tipped by means ofthe rocker-arm c attached to the brush-holder yoke d. 25. The Regulator.—Two types of regulator havebeen brought out for the multipolar Brush machines. Thefirst type used magnetic clutches to move the rheostat shaft on which were mounted two magnetic clutches wasdriven at a uniform speed by a belt from the main shaft carrying the rheostat arm Avas moved by theclutch shaft by means of beveled gears, so that when cur-rent was allowed to pass through one clutch, the rheostatarm was m
[Electric engineering.] . d by the regulatorand at the same time the brushes are tipped by means ofthe rocker-arm c attached to the brush-holder yoke d. 25. The Regulator.—Two types of regulator havebeen brought out for the multipolar Brush machines. Thefirst type used magnetic clutches to move the rheostat shaft on which were mounted two magnetic clutches wasdriven at a uniform speed by a belt from the main shaft carrying the rheostat arm Avas moved by theclutch shaft by means of beveled gears, so that when cur-rent was allowed to pass through one clutch, the rheostatarm was moved in one direction, and when the other clutchwas thrown into action, the arm was moved in the oppositedirection. The current through the clutches was regulatedby a wall controller. This controller consisted of two series § 19 ELECTRIC LIGHTING. 21 magnets provided with armatures carrying contacts, so thatwhen the current became low one clutch was energized, andwhen too large, the other. This form of regulator is not. Fig. 14. now manufactured, so that it will not be necessary to describeit in detail. The one now made is shown in Fig. 14. Thisregulator is shown at C, Fig. 13, but Fig. 14 is a larger 22 ELECTRIC LIGHTING. 19 view, showing the regulator with its rheostat detached fromthe machine. It requires no wall controller and is oper-ated by an encased magnet m connected in series with thelamps. The magnet m does not move the rheostat arm <?,but simply controls a valve that admits oil under pressureto either side of a vane or piston that swings around in theclosed chamber b. The oil pressure necessary to operatethe piston is maintained by means of a small rotary pump c
Size: 1251px × 1998px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidelectricengi, bookyear1902
