Abstract: A burglar proof fire safe window covering is disclosed. The device comprises: a plurality of vertical bars slidingly supported at an upper and a lower end by a pair of spaced apart tracks; a plurality of pin engaging apertures at the upper and lower ends of the bars; an upper and lower plurality of vertically movable pins releasably biased into engagement with the apertures; and means for releasably engaging the pins in the apertures. A device is provided for aligning the apertures with the pins when the bars are deployed in an extended position. The window is designed so that it can be quickly and easily opened from the inside for escape of the buildings occupants in the event of a fire.

Abstract: A two-sheet or double sided folding wall or door includes panel elements which are hinged in pairs along their inner edges to one another. To permit the door to be opened into a configuration wherein the panel elements are longitudinally aligned, and to permit the door to be closed into a fully folded position, horizontal brackets are mounted on at least one of each wall panel element pair. Bracket arms extend at an obtuse angle opposite the element in the closed position. A spring set between the free ends of the two opposing brackets exerts torsional forces around the panel element hinge axes. These forces act in a closing direction in a closed folding wall and in an opening direction in an open folding wall.