. The Street railway journal . view of the higherdemands upon it some slight changes havebeen made. The new apparatus required are the motorthrow-over switch and the speed 6 and 7. The first serves for connect-ing the windings of the stator of the twelve-pole motor alternately for high or low ten-sion. It is a cast-iron box containing avertical shaft carrying two sets of knifecontacts, leading to the motor windings and to theprimary switch and speed controller respectively, and cor-responding to the high and low-voltage connections. Thisshaft terminates in a piston which is ac
. The Street railway journal . view of the higherdemands upon it some slight changes havebeen made. The new apparatus required are the motorthrow-over switch and the speed 6 and 7. The first serves for connect-ing the windings of the stator of the twelve-pole motor alternately for high or low ten-sion. It is a cast-iron box containing avertical shaft carrying two sets of knifecontacts, leading to the motor windings and to theprimary switch and speed controller respectively, and cor-responding to the high and low-voltage connections. Thisshaft terminates in a piston which is actuated by compressedair controlled from the pneumatic master controller. Theinside walls of the box are lined with micanite. The speed been altered to correspond to the three ranges of will be seen from the wiring diagram, this locomotive hasonly one water resistance, Figs. 10 and 11, whose capacityis greater than previously used. This increase is secured bypassing vertical pipes through the water for air circulation. FIG. 10.—WATER RHEOSTAT and cooling. By the use of this water resistance the cur-rent, and consequently the torque at starting, can be keptconstant and as high as may be desired. Its operation hasbeen highly satisfactory in continued service through manyyears. In the operation of mountain railways it very frequently April 6, 1907.] STREET RAILWAY JOURNAL. 579 os;o H da I—( > > 0n O n M o >O f> o z ono o H M <!
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
