Abstract: A ceiling module includes a ceiling-defining sheet of material and an overlay spaced above and parallel with the ceiling-defining sheet. The overlay is secured to the ceiling-defining sheet along the periphery of the ceiling-defining sheet and also at positions spaced inwardly from the periphery to support the ceiling-defining sheet.

Abstract: A combination light and air ventilation fixture for suspended ceilings is provided. A surrounding frame forms the air supply and air exhaust ducts, in addition to supporting the light producing portion of the fixture. The air ducts are substantially identical in construction, each consisting of two planar, stamped formations, joined together, with the air passageway located therebetween. A separate U-shaped, stamped formation separates the different air ducts to complete the frame. These U-shaped members are provided with lower flanges, corresponding to the lower flanges of the air ducts, and thus appear visually continuous with the air ducts. Cast corner members join the planar formations of the air ducts to the U-shaped members, forming the completed frame. Placement of the fixture in the suspended ceiling support grid is assisted by placement clips attached to the frame, which are received by slots located in the ceiling grid.

Abstract: A recessed ceiling mounted lighting fixture is disclosed, characterized in the incorporation of improved mounting means for effecting connection thereof to a ceiling tile support grid. The mounting means includes spring projected latches which may be readily released to a grid engaging position by the installer and which automatically hold the fixture in a predetermined heightwise relation to the ceiling.

Abstract: In a ceiling supported lighting fixture, an improved mounting device is provided, having clamping plates with a notch for receiving a ceiling support member. The clamping plates are mounted to the end plates of the light fixture in two parallel pairs to effect alignment of the notch and plate, and the ceiling support member can be locked in the notch to prevent inadvertent relative movement. The locking is carried out by a latch member which is pivotally mounted on the clamping plate and moved between a locking and an unlocking position. The lighting fixture is also provided with an improved ballast holder including a ballast hole in a wall of the fixture and two identical ballast mounting clips, each formed from an integral blank of spring metal receiving an edge of the housing under tension and a spring clamp extending from the gap to hold a ballast in place upon insertion into the hole and between the two clips.

Abstract: A track lighting system comprising an elongated track member including an upstanding web adapted to act as a support point for the system and to provide stiffness thereto. The track member defines a longitudinally extending recess having a throat portion communicating with the side opposite the web and generally exposed to the room in which the track member is to be installed. The system also includes a pair of insulated conductors each extending parallel to each other within the recess and on opposite sides of the throat and a lighting fixture adapted to be mechanically interlocked with the track member for physical support.

Abstract: In an integrated suspension ceiling it is disclosed in which a fluorescent tube type lighting fixture is supported from an directly over a runner forming a part of the grid of the ceiling system. The runner is provided with a central web and oppositely extending flanges extending from the sides of the web. The web is formed with an opening above which the lighting fixture is supported. The lighting fixture includes a ballast frame separately supported on the runner above the opening, a reflector positioned in the opening below the ballast frame supported directly on the runner and a louver mounted within the opening flush with the plane of the ceiling. Each of the frame, reflector and louver are separately supported and removable from the runner for installation and service. Because the lighting fixture is supported directly on the runner and is removably attached thereto, the lighting fixture can be installed after the grid is installed. The fixture does not provide an interruption in the ceiling system.

Abstract: There is described a lighting panel for a drop ceiling of the type in which a plurality of T-frame members are arranged in a grid, forming a pattern of rectangular openings with ceiling panels supported in the openings by the grid. The lighting panel has an outer frame which is slightly smaller than one of the openings, with a light diffusing panel mounted in the frame. The frame is supported from the grid frame members by a pair of support members that project from the outer frame at opposite ends of one side, the projecting support members allowing the one edge of the outer frame to be supported with the panel in a vertical position. The panel is rotated up into a horizontal position within the grid opening and latch means secures the free edge of the outer frame to the grid frame member to hold the lighting panel in place.

Abstract: A three dimensional internally illuminated advertising device is sized the same as the panels forming a suspended ceiling and is used in place of one of the panels and is supported by the suspended ceiling grid network.

Abstract: A lighting panel trim element for attachment to the outer marginal edges of a lighting panel is disclosed as having a throat section for receiving the top, side and bottom marginal edges of the lighting panel, a horizontal wall section for mounting the lighting panel relative to a lighting fixture, and means for positively securing the lighting panel within the throat section of the lighting panel trim element.

Abstract: A corner bracket having a cross member and mounting arms at right angles with each other is arranged to be fastened at any desired height in a corner of a room. A lamp housing interengages with the bracket snugly in the corner and has right angled rear walls and a downwardly directed configuration including an interiorly contained screw socket. A bulb for fostering plant growth fits in the socket entirely within the housing. A lamp cord depends from the rear of the housing while corner molding is provided for decoratively concealing the lamp cord between the housing and the floor of the room.

Abstract: A suspended ceiling comprises a plurality of prefabricated coffer-type modules which are independently and adjustably suspended from the overhead building structure by hanger wires connected to eye-bolts mounted at the corners of the individual modules.Panels are provided between the modules to effect interconnection thereof and to complete the ceiling structure.Air handling openings are provided in the module frames and lighting fixtures may be mounted within the modules.

Abstract: A ceiling mounted support structure for mounting light fixtures, louvers, and the like, including at least one support piece mounted or supported by at least one building ceiling support, the piece having an elongate slot therein in which an enlarged end of a flipper bar rotates. The flipper bar rotates upwardly to permit the fixture part to be supported to pass upwardly therepast and rotates downwardly to provide the in-place support for the fixture part.

Abstract: The present invention relates to a device for moving lamps used in clinical situations.The moving device has rails and a support which is movable on these rails. The rails are buried in the ceiling and the lamp is suspended from the support. The lamp is movable across an opening provided in the bottom of the rails. A belt is stretched across the total area of said opening to completely seal the opening; the downward support for the lamp passes through this belt; and the belt is movable together with the movement of the lamp.

Abstract: A hollow light duct extends through the roof of a building to the ceiling of a room within the building to be lighted. A translucent light emitting panel is mounted over one end of the duct on the roof of the building and a hingeable lid is secured to the end of the duct. The lid is provided with a reflecting surface for reflecting sunlight through the translucent panel into the duct. The opposite end of the duct includes a diffusing panel positioned in the ceiling of the room; the duct includes artificial light source to provide illumination when insufficient daylight is present; the reflecting lid is closed to reflect the artificial light and prevent its escape from a duct when the artificial light source is in use.

Abstract: Light diffuser and illuminating ceiling display fixture for use in combination with a suspended ceiling which is in the form of an integral body of translucent, synthetic plastic sheet material. The integral body is hollow, has an open top and includes an outwardly extending annular rim. The outer dimension of the rim is approximately the same as the distance between upright web portions of adjacent, parallel ceiling title support bars. The rim is severable for supportive engagement with support members of varying spacing and the translucent body is resiliently flexible, enabling substantial deformation for fitting the fixture into an opening defined by a rectangular arrangement of ceiling support bars.