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:
Feb. 09, 1993
Filed:
Jul. 30, 1992
Kevin P Waltz, Indianapolis, IN (US);
Von Duprin, Inc., Indianapolis, IN (US);
Abstract
An electromagnetic door lock assembly employs an electromagnet positioned in a frame adjacent to a door, and an adjustable armature assembly positioned in the door for interaction with the electromagnet. The armature assembly includes an armature plate having a pair of shear low-cost, replaceable elements that initially engage the electromagnet. A backing plate is situated adjacent to the armature plate, and a stem coupling the backing plate to the armature plate includes a spring biasing the backing plate and armature plate toward each other. A mounting portion for mounting the armature assembly to a door to be locked is provided with adjusting screws for adjustably positioning the backing plate at a fixed position with respect to the mounting portion so that the armature plate is positioned at a first position for optimum interaction with the electromagnet, the screws having elongated heads for maintaining the relative alignment between the armature plate and the mounting portion as the armature plate moves between the first position and a position contiguous to the electromagnet.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile