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:
Nov. 25, 1986
Filed:
Sep. 18, 1985
Herbert W Hoffman, New Palestine, IN (US);
Richard B Cohrs, Indianapolis, IN (US);
William P Dye, Indianapolis, IN (US);
Van Duprin, Inc., Indianapolis, IN (US);
Abstract
The assembly, in a first embodiment thereof, comprises an annular cam retainer which rotatably journalled on the mortise cylinder of an exit alarm unit, and has a limb disposed for movement by the tailpiece of the mortise cylinder for engagement with a bearing surface on the rotary, switch cam of the assembly. The cam retainer retains the rotary, switch cam in an alarm-silenced position while the key may be rotated in its key cylinder to a disengageable position and removed. The modification kit comprises a cam retainer (i.e., an unthreaded annulus, in one embodiment) required for modifying a key-operated, exit alarm, switch cam assembly to enable removal of the key with the alarm in a silenced position as aforesaid. The modification method sets forth the precedural steps in retrofitting a switch cam assembly with such a modification kit.