Air Brake Text for Engineers and Firemen; A Complete Treatise on the Westinghouse and New York Air Brake and Signal Systems, Air Brake Practic [!] and Train Handling

Air Brake Text for Engineers and Firemen; A Complete Treatise on the Westinghouse and New York Air Brake and Signal Systems, Air Brake Practic [!] and Train Handling

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...Referring to Fig. 76, it will be seen 'that main reservoir pressure is always present in the chamber surrounding application valve 5, by its connection through passage a, a, to the main reservoir pipe. Chamber b to the right of application piston IO is always in free communication with the brake cylinders, through passage c and the brake cylinder pipe. Application cylinder g at the left of application piston 1o is connected by passage h with the equalizing valve seat, and to the brake valves through the application cylinder pipe. AUTOMATIC OPERATION. Charging. Referring to Fig. 76, which shows the movable parts of the valve in release position, it will be seen that as chamber jv is connected with the brake pipe, brake pipe air flows through feed groove 1/ around the top of piston 26 into the chamber above equalizing valve 31, and through port 0 to the pressure chamber until the pressures on both sides of the piston are equal. Service Application. When a service application is made with the automatic brake valve, the brake pipe pressure in chamber p is reduced, causing a difference in pressures on two sides of this piston, which results in the piston moving toward the right. The first movement of the piston closes the feed groove and at the same time moves the graduating valve until it uncovers the upper end of port s in the equalizing valve 31. As the piston continues its movement the shoulder on the end of its stem engages the equalizing valve, which is then also moved to the right until the piston strikes equalizing piston graduating sleeve 44, graduating spring 46 preventing further movement; port s in the equalizing valve then registers with port h in the seat, and cavity n in the equalizing valve connects ports I1 and w in the seat....show more

Product details

  • Paperback | 80 pages
  • 189 x 246 x 4mm | 159g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236822013
  • 9781236822017