Accession Number : ADD002408

Title :   Local Derailment Sensor and Brake Actuator System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Armstrong,John H ; Wassmann,William W

Report Date : 30 Dec 1975

Pagination or Media Count : 9

Abstract : The patent relates to a motion sensor combined with a journal bearing thermal detector which produces an output signal used to activate a train's brake system upon detection of a local wheel derailment or excessive bearing temperatures. Wheel impact with the roadbed and/or bearing temperatures exceeding a predetermined value causes the sensor to activate a percussion-initiated power source. The output signal triggers an electroexplosive brake venting mechanism, puncturing and venting the brake line for a full service brake application to stop the train.

Descriptors :   *Railroad cars, *Derailment, *Journal bearings, *Patents, Axle shafts, Failure(Mechanics), Temperature sensitive elements, Braking, Detectors, Monitors

Subject Categories : Surface Transportation and Equipment
      Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE