Derail alarm systems

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United States of America Patent

PATENT NO 9981676
SERIAL NO

14996223

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A derail alarm system for notifying a tamping machine operator that a tamping projector buggy is in a derailed condition. A rail sensor with an ultrasonic beam attaches to a tamping projector buggy to sense alignment with a metal rail. When the ultrasonic sensor detects an out-of-tolerance condition, aural and red-LED light visual indications are electronically provided to the tamping machine operator. The tamping machine operator may disable the aural indication and change the red-LED indication to an amber-LED indication until the ultrasonic sensor detects an in-tolerance condition. A limit switch deactivates the cradle sensor when the tamping projector buggy is raised and stored in the travel position for a higher speed transport condition.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sandstrom, Edward Stanton Langley, CA 1 1

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