. The street railway review . line between Thun and Burg-dorf. The current is here transformed down from volts to-750 volts, and carried from thence to the two hard copper trolleywires, 8 mm. in diameter, and to the rails forming the third the trolley wires two sliding contacts convey the current tothe stator of the motors, the third connection being through thewheels of the carriages. The rotors of the motors are providedwith rheostats and sliding contacts for purposes of control. A general view of one of these cars is given in Fig. 3. Details ofthe construction arc shown in
. The street railway review . line between Thun and Burg-dorf. The current is here transformed down from volts to-750 volts, and carried from thence to the two hard copper trolleywires, 8 mm. in diameter, and to the rails forming the third the trolley wires two sliding contacts convey the current tothe stator of the motors, the third connection being through thewheels of the carriages. The rotors of the motors are providedwith rheostats and sliding contacts for purposes of control. A general view of one of these cars is given in Fig. 3. Details ofthe construction arc shown in Fig. 5. The main frame is 49 ft. longand 6 ft. 6,/2 in. wide. The distance between the center line of thebogies is 31 ft. The wheelbase is 7 ft. 254 in. The car, when com-pletely equipped, weighs 71,680 lb. empty, and has seating capacityfor 66 passengers. Each bogie is provided with two motors, gearedto the driving axle of the car. The method of suspension is shownin Iig. 7. There are 83 teeth in the spurwheel. and j8 in the. -LOCOMOTIVE. pinion, giving a gear ratio of The diameter of the drivingswheel is 40 5-32 in. when new. The trailers used are of lighter con-struction than the motor cars, and weigh lb. Each motorcar is fitted with one of Messrs. Peyer & Favargers tachygraphs,for recording automatically the speed of the car. The motors are of the three-phase type, with eight poles, anddesigned to give 64 brake h. p. each when connected to a linehaving a tension of 750 volts and a frequency of 40. The speed of
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
