Abstract: A display frame work is described in terms of a display header, with upper and lower horizontal tubes and vertical end tubes to define a rectangular frame to which a flexible cloth, paper or plastic header panel is attached. Each of the horizontal members has a central hinge with a horizontal pintle from which leaves extend in opposite directions when the device is assembled. One of the leaves is fixed in a central tube; the other is constructed to permit the tube to which it is mounted to slide toward and away from the pintle. The fixed leaf has a locking tab projecting beyond the pintle, and the sliding travel of the tube that is slidably mounted is from a position clear of the locking tab to one embracing the locking tab. Outboard end sections of the horizontal members are hinged to the central tube members in a way similar to that of the two central tubes, but on hinges pintles of which are oriented perpendicularly to the central member hinge pintle. The tubes are hollow and open ended.

Abstract: A cooling tower has hollow fill slats formed in a rectangular cross-sectional configuration from a suitable polymer. These slats are supported on polymer grids, each comprised of an upper section and a lower section which forms a downward extension of the upper section. The two sections for each grid have horizontal and vertical stringers which are arranged in rows and delineate rectangular grid openings through which the slats extend. The two sections overlap, and in the region of overlap the upper section on its horizontal stringers has knuckle-type connectors that interlock with horizontal stringers of the lower section such that the grid openings for the two grid sections are generally in registration in the region of overlap. The upper section also has alignment lips on some of the vertical stringers in the region of overlap, and these lips maintain the lower section properly aligned with the upper section.

Abstract: A cooling tower has a circular cooling section, the top of which is a hot water distribution basin to which hot water is pumped while the bottom is a collecting basin. Within the cooling section is a fill comprised of a multitude of slats and wire grids through which the slats project so that the slats are carried by wire grids. The grids in turn are supported at several levels on a framework that rests on the collecting basin and extends upwardly to the distribution basin, but the framework is not suspended from that basin, so the distribution basin carries only its own weight and the weight of the pool of hot water within it. That water flows into the fill from nozzles in the distribution basin and cascades through the multitude of slats in the fill, thereby becoming quite finely divided. Air, on the other hand, passes transversely through the fill and absorbs heat from the water so as to lower the temperature of the water.