. Revised and enlarged ed. of the science of railways . turned to point down-ward, the plug [P) will beturned one quarter turn,bringing port a opposite h,thus connecting the triplevalve exhaust with theatmosphere through theport. Tn that position the triplefree an exhaust as though theremoved from the pipe. Whenthe retainer is to be used, the handle is turnedup to a horizontal position, as shown in figure E,before descending a grade. The plug {P) con-nects the port h with the under side of a weightedvalve iW) which it must raise to let pressureescape at c. About fifteen pounds are requiredto r
. Revised and enlarged ed. of the science of railways . turned to point down-ward, the plug [P) will beturned one quarter turn,bringing port a opposite h,thus connecting the triplevalve exhaust with theatmosphere through theport. Tn that position the triplefree an exhaust as though theremoved from the pipe. Whenthe retainer is to be used, the handle is turnedup to a horizontal position, as shown in figure E,before descending a grade. The plug {P) con-nects the port h with the under side of a weightedvalve iW) which it must raise to let pressureescape at c. About fifteen pounds are requiredto raise valve W, and when raised, all in excessof that amount slowly escapes through the smallport c, the fifteen pounds being retained in thebrake cylinder while the engineer releases thetriple valves and recharges the auxiliary reser-voirs. The engineers valve is the valve on the locomo-tive used to operate the brake. It is, therefore. direct exhaustvalve has asretainer were 348 RAILWAY EQUIPMENT. F1G,F. TO THE. /ITrlOSPHEnC- TO Ai/I/N fl£<5f/fy0/^. > TO r/{/>JN l/Af£. Af/r/^ Reservo/r d T/f/r/A/ L/a/e Connected F/G, G, TO ^ TMOSP/^ rO /V/^/A f^£S£/i\^0//i
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Keywords: ., bookcentury1800, bookdecade1800, bookidsciencerailw, bookyear1800
