Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . feed valve and 60is the spring which controls valve 59. By reference to Fig. 231, Sec. 3, it will be seenthat there is a slide valve (55) attached to a piston (54),and this piston is forced for-ward by a spring (58). The action of the newslide valve feed valve is asfollows: When the handle ofthe rotary is in runningposition, main reservoirpressure drives the . slidevalve and piston back,which uncovers a port inthe slide valve seat that
Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . feed valve and 60is the spring which controls valve 59. By reference to Fig. 231, Sec. 3, it will be seenthat there is a slide valve (55) attached to a piston (54),and this piston is forced for-ward by a spring (58). The action of the newslide valve feed valve is asfollows: When the handle ofthe rotary is in runningposition, main reservoirpressure drives the . slidevalve and piston back,which uncovers a port inthe slide valve seat thatconnects with feed port i,and as the slide valve doesnot move until the train-pipe is fully charged, it causes the pressure to berestored very quickly after it has been reduced fromany cause. The reason the slide valve does not move until thepressure is restored is because the piston has no pack-ing rings, and the air is allowed to circulate by itthrough a small passage that leads to the supply valvechamber, from which it passes under the cut-off valveacross the diaphragm into feed port ix and when thereis a pressure of seventy pounds on the diaphragm it. 63 62 Figure 232 Slide Valve Feed Valve 544 LOCOMOTIVE ENGINEERING moves away from the supply valve and allows it toseat, when the circulation by the piston is stopped,causing the pressure to equalize on both sides of theslide valve piston, when spring 58 moves the slidevalve and closes communication between the mainreservoir and the trainpipe. Whenever trainpipepressure falls below seventy the diaphragm forcesvalve 59 off its seat and the same action is repeatedas before. The Triple Valve. Having studied the constructionand operation of the air pump at some length it isnow in order to devote a space to the method ofutilizing the compressed air in the setting of brakeson the train, according to the Westinghouse to the air pumpthe triple valve is one of the mostimportant factors in the automatic air brake equipmenta
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectlocomot, bookyear1916
