Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . (FIG. 2J2). The purpose of this position is to promptly release theautomatic brakes and to apply the straight air brakes onthe Locomotive. In this position, air is flowing directlyfrom chamber B (main reservoir) into chamber A (brakepipe) past the end of the slide valve and through portsM. Port O is open to port J and exhaust passage C toreturn the piston EV 193, and port W is open to chargethe supplementary reservoir. Port T, also by
Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . (FIG. 2J2). The purpose of this position is to promptly release theautomatic brakes and to apply the straight air brakes onthe Locomotive. In this position, air is flowing directlyfrom chamber B (main reservoir) into chamber A (brakepipe) past the end of the slide valve and through portsM. Port O is open to port J and exhaust passage C toreturn the piston EV 193, and port W is open to chargethe supplementary reservoir. Port T, also by means of 640 LOCOMOTIVE ENGINEERING port J, is open to the exhaust passage C to dischargethe pressure from the large compartment of the dividedreservoir. Port E is also open for pressure to pass to thedriver brake cylinders through the straight air pipe untilshut off by the reducing valve. running position. Running and Straight Air Release Position.(Eig. 273.) This is the proper position of the handlewhen wishing to release both Straight Air and Automaticbrakes simultaneously, or to release the Straight AirBrake. Connection from Chamber B into Chamber A. W E F J O R V N Fig. 274. Lap Position. is made through the ports M. Port E is lapped. PortsO, T and W remain the same as in Release R and A register with each other, thus connectingthe straight air brake with the exhaust passage C asshown, to discharge the pressure from the driver brakecylinders. Lap Position. (Fig. 274.) This position should beused in case a hose bursts, the train parts or a con-ductors valve is opened, to save the main reservoir pres- THE B2 BRAKE VALVE 641 sure. In this position all ports are blanked, exceptingport O. As in Release and Running Positions, this portis open to the exhaust passage C. In this particular posi-tion cavity P in the slide valve seat is made use of toconnect the port with passage C.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectlocomot, bookyear1916
