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Digital linear position sensor

  • US 4,909,560 A
  • Filed: 02/27/1989
  • Issued: 03/20/1990
  • Est. Priority Date: 02/27/1989
  • Status: Expired due to Fees
First Claim
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1. In an automotive vehicle having a seat for an occupant mounted on a stationary seat frame and a motorized seat position adjustment mechanism for moving a portion of said seat, an apparqatus for digitally sensing and storing the position of said portion of said seat comprising:

  • a stationary member;

    a movable member fixed to said portion of said seat and being movable relative to said stationary member;

    a plurality of magnets mounted on one of said members, said magnets having alternating magnetic poles arranged in a side by side manner on said one member; and

    a sensing means positioned on the other of said members in close proximity and alignment with said poles on said one member whereby said sensing means produces a signal when one of said poles passes said sensing means as said mechanism adjusts the position of said seat.

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