Identifier: textbookonlocomo02inte (find matches)
Title: A textbook on the locomotive and the air brake
Year: 1901 (1900s)
Authors: International Correspondence Schools
Subjects: Locomotives Locomotive boilers Locomotives Railroad cars
Publisher: Scranton, Pa., International textbook co
Contributing Library: Northeastern University, Snell Library
Digitizing Sponsor: Northeastern University, Snell Library

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e released the exhaustport of the triple takes care of any leakage. The groove hasgenerally been placed in the top of the cylinder, although inmany freight cylinders they are now placed in the side,midway between top and bottom. In these positions it is leastlikely to become clogged with dirt. It is made of such alength that the brake piston must move out about 1^ inchesbefore the groove is covered. Leakage grooves are foundin the brake cylinders of freight and passenger cars, andalso on most tenders, and in some driver-brake cylinders.When applying the brakes, air enters the cylinder and forcespiston 3 out, and the release spring 9 is compressed;when releasing the brakes, air leaves the cylinder, and therelease spring forces piston 3 back to release position, as §15 THE NEW YORK AIR BRAKE. 31 shown in Fig. 11. The front cyhnder head 4 acts as a guidefor the sleeve 8. The cup leather packing 7 keeps the air that enters thecylinder from passing by the piston; it takes the place of the
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ordinary iron packing rings used in steam cylinders. Asthe air enters the cylinder it strikes the flanges of the leather,forcing them against the walls of the cylinder, and forming an 32 THE NEW YORK AIR BRAKE. §15 air-tight joint. The follower plate 6 holds the leather packingin place. Air is prevented from passing the piston by theexpander ring 8, which forces out the leather against the wallsof the brake cylinder. TRAIN-PIPE COUPLINGS. 55. In Fig. 12 (a) is shown an air-brake hose H withthe nipple iVand coupling C attached; they are fastened to thehose by means of the clamps c, c. Fig. 12 (6) is an enlargedview of the coupling C shown in (a); this is a device for coup-ling together the hose on two adjacent cars. Fig. 12 ((?) is anangle cock, one of which is attached to each end of the trainpipe on each car, as seen in Fig. 1. Connection is madebetween hose and angle cock by means of the hose nipple N,see (a), which is screwed into the angle cock at i, see (d), theend 6 of the cock

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