A significant number of freight cars have a relatively high center of gravity and a truck center distance close to the 39-foot standard rail joint spacing. When operated near the resulting resonant speed of 18 to 20 mph on a curved track, such cars may derail. A hydraulic sensor is described in the patent application which detects and registers the resonant rocking motion of a train car and activates the brake system to stop the train prior to possible derailment due to wheel rock-off from the track.

  • Supplemental Notes:
    • Government-owned invention available for licensing. Copy of application available NTIS.
  • Corporate Authors:

    Department of the Navy

    Constitution Avenue and 18th Street, NW
    Washington, DC  United States 
  • Authors:
    • Swaim, F H
  • Publication Date: 1974-7-25

Media Info

  • Pagination: 15 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00093773
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PAT-APPL-491 983 Patent
  • Files: TRIS
  • Created Date: Feb 4 1976 12:00AM