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Self-correcting sensor for an entrance

  • US 7,178,289 B2
  • Filed: 09/12/2003
  • Issued: 02/20/2007
  • Est. Priority Date: 09/12/2003
  • Status: Expired due to Fees
First Claim
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1. A self-correcting sensing element device comprising:

  • a base adjacent a doorway fastened to a doorjamb or other stationary structurean elongated support member having a base end, a working end, and an axis in the direction of elongation, said base end fastened to said base; and

    a sensing element in said working end, wherein said support member is formed of a flexible material that renders the elongated support member (i) capable of being bent about the axis more than 90 degrees from a starting shape in response to an application of a first force and (ii) capable of returning to the starting shape upon removal of the first force, whereupon;

    in the absence of an applied second force, the support member has a first shape,in response to the application of the second force, the support member bends whereupon the working end moves relative to the base end and the support member assumes a second shape different than the first shape; and

    in response to the removal of the second force, the flexible material forming the support member returns said support member to its first shape.

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