Abstract: A tipping grid assembly includes a frame in which a tipping grid is supported and a scraper disposed above and reciprocatingly movable with respect to the tipping grid. The scraper includes a bridge having top and bottom chords, and teeth on the bottom chord over the tipping grid. A pair of running rails are attached to the frame to support a pair of posts which in turn support the top chord of the bridge. A pair of chains pull the bridge over the tipping grid to remove clogged material.

Abstract: A device for containing and extinguishing fires and for preventing fires comprises a double-layer plastics foil consisting of polyethylene or polyproplene which contains flame-smothering or flame inhibiting additives, the foil being intended in use to be laid upon burning or endangered objects to form an air-excluding protective layer which covers all irregularities in sealed manner due to the pliability of the foil.The double-layer foil is produced by blowing on an extruder, flame-smothering or inhibiting additives such as granular antimony being added to the foil material. Additives are preferably added which enter into a homogeneous combination with the foil material.