Abstract: A fire-fighting tool incorporates a twist-lock mechanism whereby various nozzles can be interchanged for particular fire-fighting purposes. Included in such nozzles are a penetrating nozzle having a doubly bevelled front end for easier access through a roof, and various fluid ejection and misting elements that can be configured in terms of fluid aperture angles to produce a mist directed somewhat back towards the user, transverse to the nozzle, or forward from the nozzle. A non-penetrating embodiment of the invention also uses an end ejecting misting region. The foregoing elements can be used in conjunction with various extention wands, which are removably connectable fluid channels bent to various angles, so as to provide easier access to fires that are located within recesses of buildings, motor vehicles, or boats and the like.

Abstract: A protected recording medium generally in the form of a disk and in one embodiment corresponding to a compact disk (CD) is provided with an annular spacer on one side thereof near the periphery thereof that will elevate an exposed downward recordable region of the medium far enough above a flat surface onto which the medium is placed to avoid contact with dust and dirt on that surface. The “upper” surface of the medium is also provided with an annular groove at a radial position corresponding to that of the spacer just noted, whereby two or more such protected recording media can be stacked one upon the other such that lateral movement of one relative to the other will be precluded.

Abstract: A flexible protector ring is provided that can be "snapped" onto the outer periphery of a disc-like recording medium, wherein the outer periphery of the recording medium fits into an annular slot on the inner surface of the protector ring, and the dimension of the protector ring in the direction normal to the plane of that medium/protector ring combination is sufficient to raise the exposed inward and downward surface of the medium far enough above a flat surface onto which the combination is placed to avoid contact with dust and dirt on the table top. The "upper" surface of the protector ring is provided with an annular slot or groove, and the "lower" surface of the protector ring is provided with an annular tip sized to fit within that annular slot or groove of a second protector ring, whereby two or more such medium/protector ring combinations can be stacked one upon the other such that lateral movement of one relative to the other will be precluded.