DOOR SURFACE MOUNTED UPPER BOLT MECHANISM FOR PANIC EXIT DEVICE

摘要

A mechanism intended for use with the oppositely directed bolts of a panic bar lock includes a keeper 26 extending from a door header to be held in a locked position in the helical guideway of a cam member 98 which is horizontally pivoted at 96 to a door surface (figs 6B, 7B). Downward (unlocking) movement of upper bolt 60 removes bolt end 32 from a slot 110 in the member 98 which is weighted to rotate until a stop 106 contacts end 32. The rotation frees the keeper 26 for release (Fig. 7A). On door closure the keeper re-enters the guideway of element 98 and rotates it back to the engaged position.