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:
Jun. 03, 1997
Filed:
Feb. 01, 1996
Robert G Fischette, Portland, OR (US);
Scot R Newport, Portland, OR (US);
Sentrol, Inc., Tualatin, OR (US);
Abstract
A method and an apparatus employing a compact magnetic security switch for detecting the open or closed position of corresponding fixed frame and movable closure members, such as door and window assemblies, of entryways of buildings. The security switch assembly includes a high intrinsic coercive force rare earth, preferably neodymium, alloy magnet mountable on a movable closure member within a close clearance and within a predetermined gap and break distance of a switch mounted on a corresponding fixed frame member when in closed position, such that the electrical contacts interact with the magnet and thereby place the switch in a nonalarm position. The method of the present invention provides for mounting the rare earth alloy magnet without invading the subsurface structural integrity of the movable closure member. The rare earth alloy magnet has a generally flat configuration and is adaptable to unobtrusive and noninvasive shallow recess or surface mounting in tight-fitting structures having close clearances.