. The Street railway journal . voir lineinto the auxiliary reservoir. Theopening of this graduated releaseconnection immediately tends torestore the auxiliary reservoirpressure to normal. What actuallytakes place is that the auxiliaryreservoir pressure is raised until it slightly overbalancesthe pressure in the train line, and the train line pres-sure, it will be remembered, has been only partially re-stored. As soon as the auxiliary reservoir pressure ex-ceeds that in the train line, it moves the triple-valve pistonback a little so as to stop the escape of air from the brake cyl-inder, and al
. The Street railway journal . voir lineinto the auxiliary reservoir. Theopening of this graduated releaseconnection immediately tends torestore the auxiliary reservoirpressure to normal. What actuallytakes place is that the auxiliaryreservoir pressure is raised until it slightly overbalancesthe pressure in the train line, and the train line pres-sure, it will be remembered, has been only partially re-stored. As soon as the auxiliary reservoir pressure ex-ceeds that in the train line, it moves the triple-valve pistonback a little so as to stop the escape of air from the brake cyl-inder, and also stops the flow of air through the graduated re-lease connection to the auxiliary reservoir. Should it be de-sired to let more air out of the brake cylinder, so as to releasethe brake still more, it is only necessary to repeat the operationof raising the train line pressure. The triple valve then letsmore air escape from the brake cylinder, air flows momentarilythrough the graduated release connection to the auxiliary reser-. of Estimated Weight= 88^ ■• ActualSlrt;el lly. Journal FIG. 4.—DIAGRAM OF BRAKE RIGGING OF MOTOR CARS voir, and the auxiliary reservoir pressure moves the triple valveback again after having released a little more air from thebrake cylinder. The system has been so well worked out thatits action, as said before, is almost like that of a straight airbrake, as far as the motormans valve and brake-cylinder pres-sures are concerned. The recharging of the auxiliary reservoir from the reservoirline when the brakes are released is manifestly done boththrough the graduated release connection and through the con- t April 22, 1905.] STREET RAILWAY JOURNAL. 733 nection afforded by the motormans valve by way of the trainline and triple valve to the auxiliary reservoir. Most of therecharging of the auxiliary reservoir will evidently be donethrough the graduated release connection, because that con-nection is much more direct than the path offered through themoto
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
