Accession Number:

ADD002397

Title:

Train Resonant Car-Body Rocking Detector System.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s):

Report Date:

1975-11-25

Pagination or Media Count:

8.0

Abstract:

The patent relates to a method whereby a hydraulic sensor 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. A hydraulic input arm attached to the sideframe pressurizes fluid within the sensor mounted on the bolster. Pressure build-up within a specific time interval due to rock-off resonant oscillation causes a ram to extend from the sensor and crush a piezoelectric element. The resultant signal activates an electroexplosive brake line venting mechanism, puncturing and venting the brake line to decelerate the train and dissipate the resonant oscillation-mode energy to immediately stabilize the rock-off situation and then gradually reduce train speed to a stop.

Subject Categories:

  • Surface Transportation and Equipment
  • Safety Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE