. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ervice and sec-ondary service to service applicationposition, and while this is designed to BRAKEPIPE QUICK ACTIONVALVE EQUALIZINGPISTON EMER. RES CHECK VALVE f- SER. VALVE is also in constant com- equalizing grao. springmunication with the out-side of the large pistonthrough a small passagethrough the piston. The application chamberand chamber C are opento the atmosphere throughthe release slide valve andgraduating valve and thereduction limiting cham-ber is open to the atmos-ph
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ervice and sec-ondary service to service applicationposition, and while this is designed to BRAKEPIPE QUICK ACTIONVALVE EQUALIZINGPISTON EMER. RES CHECK VALVE f- SER. VALVE is also in constant com- equalizing grao. springmunication with the out-side of the large pistonthrough a small passagethrough the piston. The application chamberand chamber C are opento the atmosphere throughthe release slide valve andgraduating valve and thereduction limiting cham-ber is open to the atmos-phere through the equaliz-ing slide valve. The service brake cyl-inder is open to the atmos-phere through the exhaustvalve of the applicationportion and its separateexhaust port, while theemergency brake cylinderis open to the atmospherethrough the emergencyslide valve and its separateexhaust port. The equalizing pistonand the emergency pistonare double ended and the outsideends of the small pistons are opento the atmosphere through the re-lease slide valve, but a raised portion RELEASE GRAD. SPRING. EQUALIZING STOP SPRING EMER PISTON & GRAD REL CAPPOSITION FOR GRAD. RELEASE BRAKEPIPE NO 3 CONTROL VALVE, tL I fcMER CYL. EMER. CYL EX CMER. RES. POSITION NO. 2 AND 12, RELEASE. force the equalizing and release pistonsto the service position shown. The first movement cuts off the feedgroove in the release piston bushing and require a 6 lb. brake pipe reduction itwill be remembered that those posi-tions are but momentary, and whilewatching the piston stems operating in November, 1911. RAILWAY AND LOCOMOTIVE ENGINEERING. M) a glass case very little difference inthese movements is noticeable, never-theless this action is sufficient to pre-vent the undesirable creeping on of duction yields the same service brakecylinder pressure on all cars regardless of piston travel or derate leakage, and maintains this leakage up to the pressure chamber air expands into thereduction limiting
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