Locomotive appliances . TrainPipe Illustrative Model of New York Quick Action Triple Valve.(All valves in normal positions). tions of the drawing, and are inoperative under ordi-nary conditions. Vent valve (71 ) is held to its seatby spring (132 ), assisted by train pipe pressure, andcan only be opened when piston (129 ) is Iovccd to theleft. Quick action valve (138 139 ) is held to its seatby spring (110), assisted by reservoir pressure, andcan only be opened when piston (137 ) moves to the 58 LOCOMOTIVE APPLIANCES. right. All parts are simple and durable, and thevalves are so located that no
Locomotive appliances . TrainPipe Illustrative Model of New York Quick Action Triple Valve.(All valves in normal positions). tions of the drawing, and are inoperative under ordi-nary conditions. Vent valve (71 ) is held to its seatby spring (132 ), assisted by train pipe pressure, andcan only be opened when piston (129 ) is Iovccd to theleft. Quick action valve (138 139 ) is held to its seatby spring (110), assisted by reservoir pressure, andcan only be opened when piston (137 ) moves to the 58 LOCOMOTIVE APPLIANCES. right. All parts are simple and durable, and thevalves are so located that no oil from the brake cyl-inder can possibly reach a rubber valve seat. Fig. 3 shows the triple with all valves in theirnormal positions; Fig. 4 shows the position of thevalves in service application; and Fig. 5 shows the. Fig. 4. Illustrative Model of New York Quick Action Triple Valve. (Position of valves in service application^. valves in emergency position. The arrows indicatethe course of the air in each position. The triple valve proper consists of the triple pistonvalve (128 ), the exhaust valve (38) and the gradu-ating valve (48). The graduating and exhaustvalves are of the slide valve pattern, and in theirarrangement on the triple piston stem are independent LOCOMOTIVE APPLIANCES. 59 of each other. The triple piston valve is of the cup orextended pattern, and forms a cylinder for the ventvalve piston (129). These three valves, combined, ofcourse, constitute the triple valve, and the triple valveis the part that gives the brake its automatic quick action part of the triple consists of the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
