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US 6,170,619 B2Granted
Manual hand brake sensor for a railroad car
AssigneeHoneywell Inc.
InventorsAlan V. Sheriff, Brady J. Hammond, Duane J. Sies, Gary R. O'Brien, Brad L. Cummins
Life of this patent
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Abstract
On a railroad car handbrake system the main handbrake shaft, used to turn the chain, is utilized during its rotation to drive a target object to a magnetic sensor. The target object may be driven by cam plates, gears, screw mechanisms or the like and may be a magnetic or ferromagnetic object. The sensor system disclosed is rugged and easily adapted to existing handbrake systems.
Claims18
A railroad car handbrake sensor assembly for the type of handbrake having a chain placed in tension by a main shaft to set the railroad car brakes, respectively, comprising:
- a) a drive means attached to the main shaft;
- b) a target movable by the drive means;
- c) a sensor capable of sensing the target when the target is within a sensitivity range of the sensor;
- d) the drive means being constructed and arranged to place the target in the sensitivity range of the sensor when the central shaft is turned to a position where the chain is unwound therefrom.
1 more element
Dependencies are inferred from the claim text.