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US4356540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture
Assignee: Individual
•
Filing: 1980-07-31
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Granted: 1982-10-26
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Expires: 2000-07-31
Abstract
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.
Inventors
- 👤 Charles D. Goralnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:04
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/02; F21S; F21S8/00; F21S8/04; F21V21/03; F21V29/00; F21V29/15
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
192 words
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.
Claim 2
Dependent Claim
192 words
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.
Claim 3
Dependent Claim
31 words
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.
Claim 4
Dependent Claim
35 words
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.
Claim 5
Dependent Claim
54 words
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.
Claim 6
Dependent Claim
60 words
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.
Claim 7
Dependent Claim
33 words
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.
Claim 8
Dependent Claim
64 words
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.
Claim 9
Dependent Claim
30 words
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.
Claim 10
Dependent Claim
36 words
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.
Claim 11
Dependent Claim
40 words
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.
Claim 12
Dependent Claim
27 words
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.
Claim 13
Dependent Claim
37 words
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.
Claim 14
Dependent Claim
22 words
A lighting fixture as set forth in claim 12 wherein the flange interfits in face-to-face relation with the rim of the pan.
Claim 15
Dependent Claim
20 words
A lighting fixture as set forth in claim 1 wherein the bottom of the pan is thin and relatively flat.
Claim 16
Dependent Claim
23 words
A lighting fixture as set forth in claim 1 wherein said first layer of insulation is secured to the bottom of the pan.
Claim 17
Dependent Claim
22 words
A lighting fixture as set forth in claim 1 wherein said first and second layers of insulation are of fibrous compressible material.
Claim 18
Dependent Claim
23 words
A lighting fixture as set forth in claim 1 wherein said mounting means comprises a socket spaced below said second layer of insulation.
Claim 19
Dependent Claim
39 words
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.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |