Electricity: measuring and testing – Magnetic – Displacement
Patent
1998-04-15
2000-06-13
Strecker, Gerard
Electricity: measuring and testing
Magnetic
Displacement
324174, 7351439, G01P 102, G01P 3488, G01B 730
Patent
active
060753595
ABSTRACT:
A magnetic sensor is provided having a pole piece, a sensor magnet, a housing and a ferromagnetic metal cap. The pole piece has a first end, a second end and a side wall. The sensor magnet is adjacent the first end of the pole piece. The housing is adapted to receive and contain the pole piece and the sensor magnet, and has an end wall with a hole defined by a rim. The cap has a floor with an inner surface for receiving the second end of the pole piece thereagainst and a wall extending from a periphery of the floor to a flange extending radially outward from the wall. The ferromagnetic metal cap is disposed within the hole in the housing such that a seal is formed between the rim of the hole and the wall, with the flange being embedded in the housing. The wall of the ferromagnetic metal cap is spaced apart from the side wall of the pole piece such that the wall is capable of flexing during dimensional changes of the housing due to thermal cycling to maintain the seal between the rim and the wall.
Echlin Inc.
Strecker Gerard
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