Abstract: A lock mechanism for releasably locking a security bar (14) over an opening (12) through a wall (10) includes a housing (30, 32, 60) for mounting to the wall adjacent the opening. An engagement mechanism (28) is coupled to the security bar (14). A keeper member (26) in the housing is movable to selectively engage a lock surface (102) on the engagement mechanism to restrain the engagement mechanism from movement relative to the housing; the engagement mechanism being allowed to move unrestrained relative to the housing when the keeper member does not engage the lock surface. A manually-operable latch mechanism (24) in the housing moves the keeper member out of engagement with the lock surface.

Abstract: A window propelling system for rapidly opening a window or door. The window propelling system is designed for installation with existing units and preferably includes a lift assembly, a cylinder assembly, a hammer assembly, a firing assembly and a secondary triggering assembly. The lift assembly includes a lift cable attached at opposite ends to the window or door. The cylinder assembly includes a piston cable which drives the lift cable during emergency opening. The cylinder assembly, in turn, is actuated by the firing assembly in response to operation of the hammer assembly. The hammer assembly is released by either an interior trigger or the secondary trigger assembly.