The Nineteen-O-Three Air Brake Catechism and Instruction Book on Operating the Automatic Brake; With a List of Examinations Questions for Enginemen and Trainmen

The Nineteen-O-Three Air Brake Catechism and Instruction Book on Operating the Automatic Brake; With a List of Examinations Questions for Enginemen and Trainmen

By (author) 

List price: US$22.39

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks

Description

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. 1902 edition. Excerpt: ...one, like an emergency reduction for the triple valve, or the reducing valve will feed air into the signal pipe as fast as it is taken out at the car discharge valve. When the pressure is reduced in the signal line at the car discharge valve and this reduction extends to the signal valve, it affects the pressure in chamber A above the diaphram 12 first, so that the pressure in B under the diaphram lifts it up, also raising the discharge valve 10 off the seat at 7, which allows the air to pass to whistle. If the diaphram gets bagged down, the pressure in B will raise the baggy part of the rubber and valve will not raise off the seat. The stem of valve 10 has the sides flattened except for top of bushing 9, air passes into B slowly while recharging. Chamber A is therefore charged up first so diaphram is. sure to set valve 10 promptly. If the fit of this stem at the top of the bushing is too loose the valve is liable to rise on its seat so the signal will "repeat" and give more than one blast for each pull of the car discharge valve. This fit must be exact or the signal valve will not always respond on both long and short trains to the proper reductions. If an air signal whistles each time brake is released with standard braking pressure, it is a sign the reducing valve is dirty and stuck open, so air goes back into main reservoir from signal line each time main reservoir pressure is reduced in recharging train. In this case signal line has main reservoir pressure. Clean the reducing valve before the air signal hose bursts. The whistle will give a shrill sound if pressure is too high. If the spring in the old style reducing valve over diaphram is too stiff it will do this. The improved reducing valve is regulated for the proper...show more

Product details

  • Paperback | 56 pages
  • 189 x 246 x 3mm | 118g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236807588
  • 9781236807588