Patent ID: 6176527
Filing Date: 2001-01-23
Classification: E05B,Y10T

Abstract:
A security locking mechanism for enhancing the security provided by a lock carried by a wing, the security locking mechanism comprising:an auxiliary bolt mechanism for mounting in a frame for the wing and an auxiliary keeper for mounting in the wing, wherein extension of a bolt of the lock into a keeper of said auxiliary bolt mechanism causes extension of an auxiliary bolt of said auxiliary bolt mechanism into said auxiliary keeper against a resilient bias, said auxiliary bolt mechanism comprising a metal housing which in use is received in a recess of said frame, and an actuating lever which is pivotally mounted intermediate its ends in said housing, is pivotally connected at one end portion to a keeper plate positioned to be depressed by extension of said bolt into said keeper, and is pivotally connected at an opposite end portion to the auxiliary bolt, wherein said auxiliary bolt is slidable in a tubular metal anchorage which projects rearwardly from said metal housing and in use is received in and anchored by a structural support for said frame; and when extended said resilient bias, said auxiliary bolt has one end portion received in said tubular metal anchorage and an opposing end portion received in said auxiliary keeper of the wing.