. The Street railway journal . Christensen air brakes with independent motor com-pressors are on all the interurban cars. An automaticswitch for starting ?nd stopping the air pump is not of this; a pop valve is placed in the train pipe inthe motormans cab, and when sufficient air pressure isreached this will begin to blow off and announce to themotorman that it is time to shut off the compressormotor. The compressor motor is started and stoppedby a jack-knife switch in the motormans cab, and itis part of the motormans duties to see that his com--])ressor is started and stopped to
. The Street railway journal . Christensen air brakes with independent motor com-pressors are on all the interurban cars. An automaticswitch for starting ?nd stopping the air pump is not of this; a pop valve is placed in the train pipe inthe motormans cab, and when sufficient air pressure isreached this will begin to blow off and announce to themotorman that it is time to shut off the compressormotor. The compressor motor is started and stoppedby a jack-knife switch in the motormans cab, and itis part of the motormans duties to see that his com--])ressor is started and stopped to maintain a sufficientair supply. The pressure carried is from 60 to 80lbs. in the storage reservoir. In making ordinaryservice stops about 20 lbs. pressure in the air-brakecylinder is common. The brake leverage is so ad-justed on these cars that the total brake-shoe pres-sure on the wheels in emergency stops is equal to 90p^r cent of the weight upon the wheels of the reartruck, it being assumed that the car is not h
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
