Patent ID: 7475578
Filing Date: 2009-01-13
Classification: E05B,Y10S,Y10T

Abstract:
1. A door locking system comprising: a mortise lock supported within a door between internal and external plate mounts, said mortise lock comprising an internal locking mechanism accessible via an eyehole configured to receive a locking cylinder; a rotatable turn piece mounted on said internal plate mount; a locking cylinder supported by and directly contacting said external plate mount, said locking cylinder having a flat, elongated tailpiece mounted to said locking cylinder and extending therefrom, said tailpiece having a distal end; a door lock cylinder conversion adapter including a first portion received within said eyehole of said mortise lock for covering a circular portion of said eyehole and a second portion received within said eyehole of said mortise lock for covering a slotted portion of said eyehole, said elongated tailpiece extending from said locking cylinder supported by said external plate mount, through said conversion adapter, to said rotatable turn piece mounted on said internal plate mount, with said distal end of said tail piece seating in said rotatable turnpiece, said conversion adapter operable with said internal locking mechanism, said locking cylinder functioning to drive said door lock cylinder conversion adapter, thus actuating said locking mechanism to lock and unlock said door.