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:
Aug. 26, 2003
Filed:
Oct. 26, 1999
Thomas Roth, Reno, NV (US);
Dennis Wojdan, Sparks, NV (US);
Vincent Frallicciardi, Reno, NV (US);
Robert Cook, Sparks, NV (US);
Securitron Magnalock Corp., Sparks, NV (US);
Abstract
An electromagnetic door lock system, allowing emergency exiting of a building, including an armature mount allowing considerable outward movement of the door with respect to the door frame on which the electromagnet is mounted, whereby outward movement of the door initiates a time delay door release, and gives an increased reassurance that the door will open in an emergency, and allows for improved tamper resistance and reduced false alarms, as the distance the door opens out of the door frame in response to actuation of a panic bar from within is greater than that of conventional systems. A tamper resistant door position sensor includes redundant magnetic reed switches for sensing the position of the door and can include an additional reed switch for detecting when an external magnet is placed near the sensor in an attempt to tamper with the system.