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:

Subject/Index Terms

Filing Info

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