The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 1997
Filed:
Dec. 12, 1994
Kenneth P Wozniak, Chelsea, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A position sensor having a magnetic proximity switch comprising relatively movable reeds (10, 12) having magnetic properties and a magnet (28) adapted to establish a magnetic flux field (18) that envelops the reeds (10, 12) to establish a magnetic attraction between the reeds, the strength of the magnetic flux field depending upon the spacing of the reeds with respect to the magnet, the magnetic attraction of the reeds being sufficient to cause them to move into electrical contact as the magnetic flux field in the vicinity of the reeds is changed in intensity as a magnetic shield (30) is moved through the flux field whereby the opening and the closing of a circuit defined by the reeds provides an indication of the position of the shield (30) with respect to the reeds (10, 12).