Abstract: A container features a pair of stacking features on its top and bottom walls enabling a plurality of such containers to be disposed in a vertically stacked configuration. One of these stacking features is a protrusion with a tip spaced from an outer surface of the respective wall and opposite sides depending from the tip on either side thereof towards the wall's outer surface, and the other one is a groove with a base recessed from an outer surface of the respective wall and opposite sides of the groove extending from the base on either side thereof towards the wall's outer surface. The groove of one such container is thus arranged to matingly receive the protrusion of another such container so that the two containers are interconnectable in the vertically stacked configuration.

Abstract: A security and escape apparatus for use with a window mounted in a wall at a position spaced above a support surface is disclosed. According to one aspect of the invention track members of a first bar section are S-shaped in cross-section so as to carry a second bar section thereon and thereby allowing the bar members of the bar sections to be uniform in length. According to another aspect a release mechanism comprises an abutting portion which is positioned beneath the bar sections to retain the sections across a window opening. The abutting portion is positioned horizontally outwardly of the bar sections such that the bar sections can extend to form a ladder beneath the window opening. According to another aspect the apparatus includes a window frame mounting arrangement cooperative with the obstructing position for resisting dismantling of the apparatus.

Abstract: A container features a pair of stacking features on its top and bottom walls enabling a plurality of such containers to be disposed in a vertically stacked configuration. One of these stacking features is a protrusion with a tip spaced from an outer surface of the respective wall and opposite sides depending from the tip on either side thereof towards the wall's outer surface, and the other one is a groove with a base recessed from an outer surface of the respective wall and opposite sides of the groove extending from the base on either side thereof towards the wall's outer surface. The groove of one such container is thus arranged to matingly receive the protrusion of another such container so that the two containers are interconnectable in the vertically stacked configuration.

Abstract: A security and escape apparatus for use with a window mounted in a wall at a position spaced above a support surface is disclosed. According to one aspect of the invention track members of a first bar section are S-shaped in cross-section so as to carry a second bar section thereon and thereby allowing the bar members of the bar sections to be uniform in length. According to another aspect a release mechanism comprises an abutting portion which is positioned beneath the bar sections to retain the sections across a window opening. The abutting portion is positioned horizontally outwardly of the bar sections such that the bar sections can extend to form a ladder beneath the window opening. According to another aspect the apparatus includes a window frame mounting arrangement cooperative with the obstructing position for resisting dismantling of the apparatus.