. Electric railway review . oltage battery circuitsneed be carried to it. June 29, 1907 ELECTRIC RAILWAY REVIEW 861 For train operation the circuits from the battery andmagnets are carried to train line receptacles at each endof the car, as well as to the master controllers, and whentwo cars are coupled together the corresponding receptacleson each car are then connected by a multi-point jumper,so that the circuits are continued from car to car. Whenseveral cars are connected in this way the movement of asingle master controller closes simultaneously the correspond-ing magnet circuits on all o
. Electric railway review . oltage battery circuitsneed be carried to it. June 29, 1907 ELECTRIC RAILWAY REVIEW 861 For train operation the circuits from the battery andmagnets are carried to train line receptacles at each endof the car, as well as to the master controllers, and whentwo cars are coupled together the corresponding receptacleson each car are then connected by a multi-point jumper,so that the circuits are continued from car to car. Whenseveral cars are connected in this way the movement of asingle master controller closes simultaneously the correspond-ing magnet circuits on all of the cars and thus operates alsothe corresponding main circuit switches. Connected to the piston rods which move the variousswitches are a number of small contact switches which openor close auxiliary circuits between stationary fingers arrangedto press on them. These auxiliary contacts are called inter-locks. and the circuits which operate the magnet valves ofeach of the various switches are carried through the interlocks. Improvements in Motors and Control—Figure 5—Method of Con-necting Interpole Windings. of other switches in such a way that the switches cannot beclosed except in the proper order. unit-switch control system, however, does not con-sist merely in replacing the ordinary controller with a set ofpneumatically operated switches, which may be closed prop-erly or improperly entirely at the discretion of the motor-man, but the action of the switches is regulated so as to givea uniform current through the motors while operating onthe resistance steps, and to thus secure a smooth and evenacceleration of the car and protect the equipment from is accomplished by means of a limit switch. The limitswitch consists of a coil, placed in series with the motor cir-cuits, which lifts an armature whenever the current exceedsa predetermined amount. To the armature of this coil isattached a disc which closes a secondary circuit between twocontacts w
Size: 1563px × 1599px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
