G - Physics – 01 – B
Patent
G - Physics
01
B
340/135.6
G01B 7/14 (2006.01) G01F 23/62 (2006.01)
Patent
CA 1301884
ABSTRACT OF THE DISCLOSURE A position sensor and method for detecting and providing an indication of the position of a movable member comprising a ferromagnetic element oriented substantially parallel to the path of travel of the movable member, the element including a segment thereof having spaced-apart ends defining the positional limits between which movement of the movable member is to be monitored, the segment comprising a pair of contiguous, oppositely polarized, remanently magnetized regions defining an intersection along the length of the segment; a magnet positioned proximate the intersection and mounted in known spatial relationship to the movable member for movement therewith, and, simultaneously along the ferromagnetic element, the magnet providing a magnetic field presenting a constant polarity to the element and having a strength sufficient to locally polarize the element, whereby movement of the magnet means along the element alters the length of the respective regions; and, means for sensing the position of the intersection without altering that position and for providing an indication of the position of the movable member based thereon.
595223
Garshelis Ivan J.
Mcfadden Fincham
LandOfFree
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