Electricity: measuring and testing – Magnetic – Displacement
Patent
1998-04-17
2000-05-02
Strecker, Gerard
Electricity: measuring and testing
Magnetic
Displacement
3242072, 32420722, 200 6188, 7447312, G01B 714, G01B 730, H01H 3600
Patent
active
060576820
ABSTRACT:
A dual positional hall effect sensor 10 having an outer housing 12, an actuator 14, a linear movement sensor 20, and a rotational movement sensor device 22. The housing 12 includes a lower chamber 24 and an upper chamber 26, with a barrier wall 28 separating therebetween. The actuator 14 is made up of a coupling 32 for coupling to a movable device (not shown) that is to have its position sensed, a rod 34 that extends from the lower to the upper chamber, a collar 36 for retaining the actuator 14 within the lower chamber, and a key 38. The linear motion sensor 20 is unattachably positioned to set on collar 36, and includes a magnetically conducting pole piece 42 and a left and right magnets 44. The magnets 44 and pole piece 42 are positioned around the rod 34 in a "U" shaped configuration. The lower chamber 24 also includes a positionally fixed hall effect sensor 46 and a spring 48 positioned between the barrier wall 28 and the collar 36. The rotational movement sensor 22, located in the upper chamber 26, includes a sensor housing structure 52 that has a groove or slide 54 for insertion and sliding of the key 38. The sensor 22 further includes a magnetically conducting pole piece 56 and a top and bottom magnet 58. A hall sensor 60 is positioned between the two parts of the magnet 58 and fixed in position relative to any rotational movement of the rotational sensor 22.
REFERENCES:
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patent: 5142225 (1992-08-01), Gerlach et al.
patent: 5198763 (1993-03-01), Konishi
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patent: 5789915 (1998-08-01), Ingraham
patent: 5955881 (1999-09-01), White et al.
Jarrard Craig A.
McCurley Jeffrey L.
Nonnenmacher Ronald C.
Olson Thomas R.
Shriver Bret W.
Bourgeois Mark P.
CTS Corporation
Strecker Gerard
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