A fibrous panel having granular particulate material adhered to an exterior surface by a film of hardened liquid is provided with a plurality of indentations extending from the exterior surface and penetrating into the panel body. Mechanical fasteners entering the exterior surface to secure the panel to a supporting structure displace part of the surface on which the liquid coated granules are located into portions of walls defining additional indentations. Indentations produced by the fasteners...

A structural panel is provided with a core comprising a thick layer of urethane foam. The core is reinforced by a sheet of metal wire fabric embedded in and effectively bonded to the urethane foam whereby to reinforce the same. Lining each of the oppositely facing surfaces of the core is a urethane sheet also bonded to the urethane foam. Extending into one surface of the panel and along one edge thereof is a wide angle, V-shaped groove of a depth sufficient to sharply reduce the thickness of the...

A flexible, versatile building system including movable wall panels has a portion of an electrical system as an integral part of the panel. The panels may be rearranged easily to provide a variety of wall and floor plan configurations adapted to suit a particular purpose. The portion of the electrical system which is integral with the panel is connected to one or more main electrical distribution systems by special easily disconnectable connectors which are formed permanently as an integral part...

A deceleration panel for the lower section of an aircraft escape slide to control the sliding speed of passengers leaving an aircraft in which longitudinal strips of rubber having a nonskid surface are mounted on strips of fabric supporting material for resisting sliding in the dry condition. The strips of fabric are fastened to a layer of three-dimensional fabric having stiff loops for draining away any water and projecting out of the water to resist sliding in the wet condition. The three-dime...

A panel characterized in that at least one of its external faces, i.e., the one under compression stresses when the panel is loaded, is made of a lamination including an outer layer bonded to an inner layer by an intermediate layer of rigid plastic foam. The thickness of the rigid plastic foam layer is many times the thickness of each of the said outer and inner layers, and the thickness of the complete panel is many times the thickness of the lamination. The panel further includes strengthening...

A molded filler material filling the voids between the nodes of dimples in a sheet of inner core double dimpled material having face sheets attached to the nodes of the dimples to form a high strength lightweight panel. This filler material forms pads having a plane surface abutting the undersurface of the face sheets and a contoured configuration abutting the core surfaces to provide a solid sandwich filler reinforcement between the face sheets at selected positions. These blocking material pad...

A tab-connected panel including a substantially rectangular sheet of metal which has had its opposite edges bent over toward each other to form spaced-apart edge margins spaced outwardly from and overlying the central expanse of the sheet. An elongated stiffener extends laterally of the sheet with its opposite ends wedged in the spaces between the edge margins and the central expanse. Tabs formed in the edge margins are bent over and into openings in the stiffener to secure the sheet to the stif...

This invention relates to an improved landing mat installation and the like comprised of a plurality of removably interlocked panels, wherein the joints formed by various marginal edges of the panels are provided with improved cooperating locking and sealing means that advantageously inhibit the penetration of water and the like through the joints as well as facilitating the installation and dismantlement of the panels making up the landing mat installation.

Large area pressurized meteoroid penetration detector panels. The structure of the panels includes an interconnected cellular configuration in which the cells have spaced periphery welds and tufts in their centers at which point a spot-weld is made joining the panels.

A paneling system employs a plurality of panels having a series of shaped connecting members mounted thereon, and a series of complementary hanger means on an upright sustainer, such as a wall or stud system. The connecting members interengage with the hanger means to mount the panels in preselected orientation; and in a modification of the system, a separate upright sustainer supports one or more panels through the coactive relation of a series of interengaged stringers having frictional block ...