Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . that in the pressure chamber, equalizingpiston 26 moves to the left, carrying with it equalizingslide valve 31 and graduating valve 28 to the releaseposition as shown in Fig. 299. The feed groove nowbeing open permits the pressure in the pressure chamberto equalize with that in the brake pipe as before de-scribed. This action does not release the locomotivebrakes because it does not discharge application chamberpressure. The double-hea
Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives . that in the pressure chamber, equalizingpiston 26 moves to the left, carrying with it equalizingslide valve 31 and graduating valve 28 to the releaseposition as shown in Fig. 299. The feed groove nowbeing open permits the pressure in the pressure chamberto equalize with that in the brake pipe as before de-scribed. This action does not release the locomotivebrakes because it does not discharge application chamberpressure. The double-heading pipe is closed at the doublecut-out cock, and the application chamber pipe is closedby the rotary valve of the automatic brake valve. There-fore, to release the locomotive brakes, the automaticbrake valve must be moved to running position, or theindependent brake valve must be held in release position,,in which positions the rotary valve of either will connectthe application chamber pipe with the atmosphere. As Ithe application chamber pressure escapes, the cylinderpressure will force application piston 10 to the left until ET BRAKE EQUIPMENT 687 ^3. o 1o 2* U > m 7) CATION £Y CHAMBER.^ W///////jW///////////Y//Y////77ffl CHAMBER. ^ FIG. 304. EMERGENCT 688 LOCOMOTIVE ENGINEERING exhaust valve 16 uncovers exhaust ports d and e, allow-ing brake-cylinder pressure to escape. Emergency. When a sudden and heavy brake-pipereduction is made, as in an emergency application, thepressure in the pressure chamber forces application piston26 to the right until it strikes against the leather gasketbeneath head 23 as shown in Fig. 304. This movementcauses slide valve 31 to uncover port h in the bush, mak-ing a large opening from the pressure chamber to theapplication chamber, so that they quickly become equal-ized. In the emergency position of the automatic brakevalve, the volume of the equalizing reservoir is con-nected to that of the application chamber. This reservoirvolume, togethe
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectlocomot, bookyear1916
