Offset hall-effect sensor
AssigneeSyron Engineering & Manufacturing, LLC
InventorStephen M. Graff
Life of this patent
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Abstract
A proximity sensing assembly for sensing the proximity of a metallic workpiece to a work holding device includes Hall-effect sensor. The magnetic field generated by the magnet is altered when a metallic workpiece is in close proximity to a magnet. Due to an offset relationship between the sensor and the poles of the magnet, the polarity detected by the Hall-effect sensor is analogous to a reversal when a metallic workpiece is proximate the magnet rather than simply detecting a change in strength. Thus the polarity detected by the Hall-effect sensor sends an clearly defined signal indicating the presence or absence of a workpiece in the work holding device.
Claims10
A work holding device and proximity sensing assembly for sensing the proximity of a metallic workpiece to the work holding device, said assembly comprising;
- a proximity sensor affixed to a work holding device for sensing the proximity of the workpiece;
- and
- said proximity sensor comprising a magnet and a Hall-effect sensor, wherein said Hall-effect sensor is positioned in an offset relationship to the poles of said magnet.
A proximity sensor for sensing the proximity of a metallic workpiece to said sensor, said sensor comprising:
- a magnet;
- a Hall-effect sensor;
- and
- said Hall-effect sensor being oriented in an offset relationship to the poles of said magnet.
Dependencies are inferred from the claim text.