Lighting fixture

• US 4,356,540 A
• Filed: 07/31/1980
• Issued: 10/26/1982
• Est. Priority Date: 08/17/1978
• Status: Expired due to Term

• Current Assignee: Charles D. Goralnik
• Original Assignee: Charles D. Goralnik
• Inventors: Goralnik, Charles D.
• Primary Examiner(s): Lechert, Jr., Stephen J.
• Application Number:
  US06/174,272
• Time in Patent Office: 817 Days
• Field of Search: 362/294, 362/147, 362/148, 362/227, 362/249, 362/311, 362/367, 362/368, 362/375
• US Class Current: 362/294
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 21/02 Wall, ceiling, or floor bases; Fixing pendants or arms to the bases F21V21/08 takes precedence; bases for movable standing lamps F21V21/06
• CPC Class Codes: F21V 21/03 Ceiling bases, e.g. ceiling roses F21V21/04 takes precedence
• CPC Class Codes: F21V 29/15 Thermal insulation
• CPC Class Codes: F21Y 2113/00 Combination of light sources

Abstract

A lighting fixture adapted to be mounted on a ceiling by attachment to an outlet box in the ceiling. The fixture comprises a pan having a bottom and a rim engageable with the ceiling for spacing the bottom of the pan therefrom, a crossbar attached to the bottom of the outlet box in position extending horizontally across the bottom of the box, and fasteners for detachably securing the rim of the pan to the crossbar. The lighting fixture also includes a first layer of insulation in the pan secured to the pan above the bottom thereof, a second layer of insulation secured on the underside of the bottom of the pan, and a light socket for mounting a light source on the underside of the pan below the second layer of insulation. A diffuser having an open top is mounted on the underside of the pan around the socket and the light source. The second layer of insulation is disposed above the light source for thermally insulating the light source from the pan and the outlet box to reduce the transfer of heat generated by the light source to the outlet box.

Claims

1. A lighting fixture adapted to be mounted on a ceiling by attachment to an outlet box in the ceiling, comprising a pan having a bottom and a rim engageable with the ceiling for spacing the bottom of the pan therefrom, a crossbar adapted to be attached to the bottom of the outlet box in position extending horizontally across the bottom of the box, means for fastening the rim of the pan to the crossbar, a first layer of insulation in the pan secured to the pan above the bottom thereof, a second layer of insulation secured on the underside of the bottom of the pan, means for mounting a light source on the underside of the pan below said second layer of insulation, and a diffuser having an open top adapted to be mounted on the underside of the pan around said mounting means and said light source with said second layer of insulation on the underside of the pan being disposed above the light source for thermally insulating it from the pan and the outlet box to reduce the transfer of heat generated by the light source to the outlet box.

2. A lighting fixture as set forth in claim 1 wherein said second layer of insulation is received inside the diffuser when the latter is mounted on the underside of the pan.

3. A lighting fixture as set forth in claim 1 wherein said diffuser and said second layer of insulation on the underside of the pan combine to define a substantially enclosed chamber for said light source.

4. A lighting fixture as set forth in claim 1 wherein said diffuser comprises a frame and a plurality of diffuser panels held by the frame in a generally upright position, said second layer of insulation on the underside of the pan being sized for a relatively close fit at its periphery with said panels.

5. A lighting fixture as set forth in claim 4 wherein said frame is generally rectangular and said diffuser comprises five diffuser panels, four of which are disposed in a generally upright position in the frame at the sides of the light source and the other of which is disposed in generally horizontal position in the frame below the light source.

6. A lighting fixture as set forth in claim 1 wherein said diffuser comprises a frame having an upwardly extending rim disposed around and generally in face-to-face relation with the rim of the pan.

7. A lighting fixture set forth in claim 6 wherein said rim of the pan is at the periphery of the pan and said rim of the diffuser comprises a generally horizontal portion on the underside of the pan generally parallel to the bottom of the pan and a vertical portion extending up adjacent to and in face-to-face relation with the rim of the pan.

8. A lighting fixture as set forth in claim 7 further comprising means for attaching said horizontal portion of the rim of the diffuser frame to the bottom of the pan.

9. A lighting fixture as set forth in claim 6 wherein the upper edge of the rim of the diffuser is disposed below the level of said fastening means when the diffuser is mounted on the pan.

10. A lighting fixture as set forth in claim 6 wherein the upper edge of the rim of the diffuser is generally coplanar with the upper edge of the rim of the pan when the diffuser is mounted on the pan.

11. A lighting fixture as set forth in claim 1 wherein the crossbar is pivotally connected to the outlet box for swinging movement about a generally vertical axis.

12. A lighting fixture as set forth in claim 1 wherein the crossbar has a flange extending downwardly from at least one of its ends, said rim of the pan being adapted to be fastened to the flange.

13. A lighting fixture as set forth in claim 12 wherein the flange interfits in face-to-face relation with the rim of the pan.

14. A lighting fixture as set forth in claim 1 wherein the bottom of the pan is thin and relatively flat.

15. A lighting fixture as set forth in claim 1 wherein said first layer of insulation is secured to the bottom of the pan.

16. A lighting fixture as set forth in claim 1 wherein said first and second layers of insulation are of fibrous compressible material.

17. A lighting fixture as set forth in claim 1 wherein said mounting means comprises a socket spaced below said second layer of insulation.

18. A lighting fixture as set forth in claim 1 wherein said light source comprises a pair of incandscent light bulbs, and said mounting means is adapted for mounting said bulbs in generally side-to-side direction with respect to said pan.