Key-operated, exit alarm, switch cam assembly and modification k

Details Key-operated, exit alarm, switch cam assembly and modification k Key-operated, exit alarm, switch cam assembly and modification k

1985-09-18

1986-11-25

Wolfe, Robert L.

Locks

Operating mechanism

Key

70DIG49, E05B 1704

Patent

active

046241205

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.

REFERENCES:
patent: 3174003 (1965-03-01), Armstrong

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