Patent ID: 6921107

Claim:
An apparatus for sensing the position of a vehicle seat movable between a forward position and a rearward position, said apparatus comprising: a Hall effect device; a magnet producing a magnetic field that acts on said Hall effect device, said magnetic field having a flux path; and a member constructed of a ferromagnetic material, said member having a portion positioned adjacent said magnet, said portion of said member positioned adjacent said magnet having a size that is unique for every different position of the vehicle seat between said forward and rearward positions; said portion of said member altering the flux path of said magnetic field which varies the portion of said magnetic field acting on said Hall effect device, the degree to which said portion alters said flux path depending on the size of said portion of said member positioned adjacent said magnet, said Hall effect device providing a signal functionally related to the magnitude of the magnetic field acting on said Hall effect device.