Abstract: The invention is a panel mounting system which uses two parallel support members. The support members engage two opposite sides of the panel. Resilient means on one side of the panel keep the opposite side of the panel in engagement with the support member engaging that side of the panel.

Abstract: A support clip for supporting ceiling panels in a suspended ceiling includes a top portion connected to and arranged substantially perpendicular to a front portion. A pair of juxtaposed prongs extend rearwardly from a bottom edge of the front portion below the top portion for insertion into an edge of a ceiling panel. A pair of laterally spaced tabs extend forwardly from the bottom edge of the front portion in an opposite direction from the prongs but in generally the same plane as the prongs. The tabs are positioned to rest on a wall molding which is attached to a wall of a building. A downwardly projecting barb is formed on the top portion for penetrating an upper surface of a ceiling panel.

Abstract: A runner system is provided to position a new ceiling over an existing ceiling and to position the new ceiling within a one to two inch space from the surface of the existing ceiling. Two z-shaped runners are fastened to the existing ceiling and ceiling boards will rest on the horizontal flanges of the z-shaped runners. A cross-runner is also designed to rest upon the horizontal flanges of the z-shaped runners and a projection and notch arrangement locks the cross-runners in position between the two adjacent z-shaped runners.

Abstract: A runner system is provided to position a new ceiling over an existing ceiling and to position the new ceiling within a one inch space from the surface of the existing ceiling. A z-shaped runner is fastened to the existing ceiling and ceiling boards will rest on the horizontal flanges of the z-shaped runner. A cross-runner is also designed to rest upon the horizontal flanges of the z-shaped runner and an indentation and groove arrangement locks the cross-runners in position between the two adjacent main runners.

Abstract: An acoustical ceiling tile is provided with a metal facing sheet covering at least one raised rib on the surface of the acoustical tile. The raised rib has two parallel sides and the facing sheet is made with two parallel edges having the ends thereof spaced apart a distance slightly less than the rib width. Consequently, the edges of the facing sheet will engage the edges of the rib and frictionally hold the facing sheet over the flat surface of the rib.The above structure will permit humidity and temperature to cause fluctuation in the dimensions of the base sheet containing the raised rib without resulting in any distortion of the metal facing sheet.

Abstract: A method is provided for adding strength to a T-bar grid fabricated with a double web and capped system. The addition of strength is achieved by coating the inside portions of the T-bar with a hot melt adhesive. Cooling sets the adhesive and results in the parts of the grid member becoming a unitized structure.

Abstract: A ceiling runner is provided with added strength to its T-bar configuration. The runner is fabricated with a double piece vertical web and two horizontal flanges. The T-bar is strengthened by fastening together the double web structure at the region of the base of the vertical web. The fastening together of the double web structure can be carried out through the use of a hot melt adhesive, a welding, a lancing pattern, etc.

Abstract: Disclosed is a self-contained evaporator type humidifier adapted to be positioned at an outlet opening of a warm air heating system and operated solely by an air stream issuing therefrom. The humidifier includes a housing provided with an air inlet opening and an exhaust air grill. A water receptacle, an adjustable water supply means, and an adjustable air-water contacting member are provided within the housing. The air-water contact member comprises a frame having a water-absorbent covering thereon and has an overall shape which is approximately that of a propeller which has been twisted at the midpoint of its longitudinal axis so that the end portions which are substantially in the shape of an elongated S, lie in planes which are generally perpendicular to each other. The air-water contact member is mounted for free rotation in journals at each end of the interior of the housing and is rotated around its longitudinal axis by the direct impingment thereon of the air stream from the heating system.