NEW DEVELOPMENTS IN AIR BRAKES

The article surveys a number of recent improvements in brake equipment and associated pneumatic controls. The D22 special control valve design differs from the "universal" control valve in that the air is governed by a relay valve. A device called the Decelostat momentarily reduces braking force on slippery wheels permitting them to return to train speed. Hot-box detectors utilizing the Wheatstone bridge principle provide warning when overheating is imminent. A new type of driver's brake valve (No. 24) incorporates five sections to suit various requirements for freight and passenger service. A new variable-load brake has been designed for light-weight wagons. A brake-cylinder release valve device isolates reservoirs and vents the brake cylinder when the "bleed" valve is pulled, thus permitting the shunter to pass from one vehicle to the next without waiting.

• Corporate Authors:

  Temple Press Limited

  161-166 Fleet Street
  Longon EC4,   England 
• Authors:
  • Stewart, C D
• Publication Date: 1947-8-1

Media Info

• Features: Photos;
• Pagination: p. 126-127
• Serial:
  • RAILWAY GAZETTE
  • Volume: 87

Subject/Index Terms

• TRT Terms: Air brakes; Brakes; Braking; Freight trains; High speed rail; Hot box detectors; Machine valves; Passenger trains; Pressure; Railroad trains; Skidding; Technology; Vehicle design; Wheel slip
• Geographic Terms: United States
• Old TRIS Terms: Brake design; Braking systems; Pressure control valves
• Subject Areas: Design; Freight Transportation; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00037915
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM