Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . Fig. 275. First Graduating Position. Graduating Positions. (Figs 275 and 276.) Thesepositions give a gradual reduction of brake pipe pres-sure for service applications. In Fig. 275 ports M are. W E F # P t ft-;,, jti Fig. 276. Last Graduating Position. blanked and communication from the main reservoir tothe brake pipe is cut off. The straight air ports E andV are also blanked, as well as ports O and W, which arecut off just before the
Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . Fig. 275. First Graduating Position. Graduating Positions. (Figs 275 and 276.) Thesepositions give a gradual reduction of brake pipe pres-sure for service applications. In Fig. 275 ports M are. W E F # P t ft-;,, jti Fig. 276. Last Graduating Position. blanked and communication from the main reservoir tothe brake pipe is cut off. The straight air ports E andV are also blanked, as well as ports O and W, which arecut off just before the handle reaches the First Gradual- 642 LOCOMOTIVE ENGINEERING ing Notch. Ports F and G are open to the exhaust pass-age C. and port S is open through passage X to port Tto receive pressure from the brake pipe and pass it to thedivided reservoir to operate the Accelerator Valve. PortsF and S will remain open to receive brake pipe pressureuntil cut off by the graduating valve EV no when theservice reduction has been made. In the remainder of the Graduating Positions, the rela-tion of ports remains the same with the exception of therestricted passage N (Fig 276) in the end of the slidevalve which in the Fifth Graduating notch is over thestraight air port V, and should there be excessive pistontravel or cylinder leakage the Straight Air equipmentwil
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectlocomot, bookyear1916
