The patent relates to a monitoring system that provides an engineer of a freight train with a real time picture of the coupling extensions of selected cars distributed throughout the entire length of his train. Located between each selected pair of cars is a sensor that detects whether a Buff (compressed) or a Draft (stretched) condition exists at the coupling. Individual encoders associated with each of the sensors respond thereto by providing one of two uniquely coded outputs representing, respectively, either a Draft or Buff condition as detected by the sensor. The outputs of the encoders are relayed by individual transmitters to a receiver located at a control station. Coupled to the receiver is a decoder that decodes the incoming signals and energizes a display that furnishes the engineer with a dynamic indication of the coupling condition existing at each of the selected points along the train.

  • Supplemental Notes:
    • Supersedes PB-234 769.
  • Corporate Authors:

    Department of Transportation

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Vrabel, J D
    • Gosselin, D W
    • Sussman, E D
    • Ofsevit, D S
  • Publication Date: 0

Media Info

  • Pagination: 7 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00136639
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: PAT-APPL-494 098 Patent, PATENT-3 905 012
  • Files: TRIS, USDOT
  • Created Date: Jul 13 1976 12:00AM