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:

1975-12-30

Pagination or Media Count:

9.0

Abstract:

The patent relates to a motion sensor combined with a journal bearing thermal detector which produces an output signal used to activate a trains brake system upon detection of a local wheel derailment or excessive bearing temperatures. Wheel impact with the roadbed andor 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