. Electric railway journal . as been taken to keepthe arc very small to prevent carbonizing of the wood in-sulating pieces. At the gap the metal contact pieces over-hang the wood, and the wood is cut away for a distanceof iy2 in. above the gap. The arc, which is broken whenthe trolley leaves the contactor, is less than 2 amp. The operation of the device is illustrated by the wiringdiagram. If the car is going to the left the motormanruns lunder the trolley contactor with the current off, andthe switch will be thrown to the left if not already set inthat position. If the car is going to the rig
. Electric railway journal . as been taken to keepthe arc very small to prevent carbonizing of the wood in-sulating pieces. At the gap the metal contact pieces over-hang the wood, and the wood is cut away for a distanceof iy2 in. above the gap. The arc, which is broken whenthe trolley leaves the contactor, is less than 2 amp. The operation of the device is illustrated by the wiringdiagram. If the car is going to the left the motormanruns lunder the trolley contactor with the current off, andthe switch will be thrown to the left if not already set inthat position. If the car is going to the right the motor-man runs under the contactor with the current on, whichthrows the switch to the- right. It is not necessary for themotorman to see the switch point in order to know whetherto keep the current on or off. The reverse result can beaccomplished if desired by reversing the magnet connec-tions in the relay. The contactor is placed on the trolley wire so that thetrolley wheel of a car passes under it when the front end. Wiring Diagram of Connections of the car is about 8 ft. from the switch point. If thecurrent through the motors of the car is off while thewheel is passing under the contactor, a small amount ofcurrent will flow from the trolley wire through the largefuse, through the relay coil to one of the side strips of thecontactor, through the trolley wheel to the other side strip(the side strips being insulated from the trolley wire and
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
