. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . FIG, 2. NEWLY INVENTED HOSE COUPLING. valve handle are shown in Fig. 2. Withthe handle in the full release the mainslide valve uncovers a large port in itsseat and permits the main reservoir air in 126 RAILWAY AND LOCOMOTIVE ENGINEERING March, 1901. chamber B to flow directly into chamberA and the train pipe. When the handleis moved to the running position thelarge direct opening between chamber Band the train pipe is closed and air fromthe main reservoir must reach the train. pipe by way of
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . FIG, 2. NEWLY INVENTED HOSE COUPLING. valve handle are shown in Fig. 2. Withthe handle in the full release the mainslide valve uncovers a large port in itsseat and permits the main reservoir air in 126 RAILWAY AND LOCOMOTIVE ENGINEERING March, 1901. chamber B to flow directly into chamberA and the train pipe. When the handleis moved to the running position thelarge direct opening between chamber Band the train pipe is closed and air fromthe main reservoir must reach the train. pipe by way of the well-known form ofexcess-pressure valve, shown in Fig. the lap position all ports are blanked,except the little one between the trainpipe and the supplementary reservoir. When making a service application theliandle of the brake valve is placed in thefirst graduating notch of the service posi-tion, the main slide valve 114, Fig. 4, ismoved backward until the small port F inits face is exposed to the train-pipe pres-sure in chamber A, Fig. 4, and with portG, which connects with port F by meansof a passage through the center of thebody of valve 114. and is also in its face,comes in register with port C in the seatof valve 114. Tliis position establishes acommunication between the train pipe andI he atmosphere so that train-pipe pressuremay be reduced, but as ports F and G aresmall it must reduce slowly. It is not necessary to lap the handle ofthis valve when making a service applica-tion, as it will lap itself; and this it doesby means of the air pressure contain
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
