Patent US4313153A successfully refreshed from Google Patents.
US4313153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pan-type lighting fixture
Assignee: AMERICAN LANTERN COMPANY C/O FIRST CHICAGO VENTURE Corp A CORP OF
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Filing: 1980-08-29
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Granted: 1982-01-26
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Expires: 2000-08-29
Abstract
Abstract A pan-type lighting fixture for mounting in association with an outlet box (3) in a ceiling is characterized by a heat-dissipating base (12) having a generally vertical sidewall section (18) and a generally horizontal planar wall (24) intermediate opposed ends (20 & 22) of the sidewall section. The horizontal wall divides the base into upper and lower compartments (26 & 28) and sockets (31) for receiving incandescent lamps are secured through mounting means (30) to the lower surface of the intermediate wall (24). A layer of insulating material (14) is disposed in the lower compartment of the base, and a layer of insulating material (15) is disposed in the upper compartment of the base. A mounting stud (13) includes a heat-insulating threaded plastic stem (38) passing through a central opening (39) in the horizontal wall of the base for connection with a threaded opening (40) associated with the outlet box. The lighting fixture complies with the UL temperature limit of 60° C.
Inventors
- 👤 George O. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:10
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/04; F21V; F21V25/00; F21V29/00; F21V29/15; F21V29/50; F21V29/70; F21V29/74
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
168 words
A pan-type lighting fixture for mounting in association with an outlet box positioned in a ceiling, said fixture being characterized by a heat-dissipating base having a thermal conductivity, k, in excess of 0.4 calories per cm. per sec. per °C., said base having a generally vertical sidewall section and a generally horizontal, planar intermediate wall disposed between opposed ends of the sidewall section, said horizontal wall dividing the base into upper and lower compartments; at least one socket being secured to the fixture through mounting means connected to the horizontal wall and positioned in the lower compartment; a layer of insulating material disposed in the lower compartment between the sockets and the horizontal wall and a layer of insulating material disposed in the upper compartment; a mounting stud including a threaded heat-insulating plastic stem passing through a central opening in the horizontal wall of the base for connection with a threaded opening associated with the outlet box, said fixture complying with the UL temperature limit of 60° C.
Claim 2
Dependent Claim
168 words
A pan-type lighting fixture for mounting in association with an outlet box positioned in a ceiling, said fixture being characterized by a heat-dissipating base having a thermal conductivity, k, in excess of 0.4 calories per cm. per sec. per °C., said base having a generally vertical sidewall section and a generally horizontal, planar intermediate wall disposed between opposed ends of the sidewall section, said horizontal wall dividing the base into upper and lower compartments; at least one socket being secured to the fixture through mounting means connected to the horizontal wall and positioned in the lower compartment; a layer of insulating material disposed in the lower compartment between the sockets and the horizontal wall and a layer of insulating material disposed in the upper compartment; a mounting stud including a threaded heat-insulating plastic stem passing through a central opening in the horizontal wall of the base for connection with a threaded opening associated with the outlet box, said fixture complying with the UL temperature limit of 60° C.
Claim 3
Dependent Claim
14 words
The pan-type lighting fixture of claim 1, characterized in that the base is aluminum.
Claim 4
Dependent Claim
37 words
The pan-type lighting fixture of either claim 1 or 2, characterized in that each socket has a central axis that is no more than about 31/2" from the upper end of the sidewall section of the base.
Claim 5
Dependent Claim
28 words
The pan-type lighting fixture of either claim 1 or 2 characterized in that the plastic stem of the mounting stud is comprised of a flame-retardant, thermoplastic polyester material.
Claim 6
Dependent Claim
34 words
The pan-type lighting fixture of claim 4, characterized in that each socket has a central axis that is no more than about 31/2" from the upper end of the sidewall section of the base.
Claim 7
Dependent Claim
36 words
The pan-type lighting fixture of either claim 1 or 2 characterized in that the insulating layers in the upper and lower compartments are comprised of fiberglass; at least one of which includes a layer of aluminum.
Claim 8
Dependent Claim
33 words
The pan-type lighting fixture of claim 6, characterized in that each socket has a central axis that is no more than 31/2" from the upper end of the sidewall section of the base.
Claim 9
Dependent Claim
21 words
The pan-type lighting fixture of claim 7 characterized in that the plastic stem is comprised of a flame-retardant thermoplastic polyester material.
References Cited (Backward Citations)
US4104713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-25 | 1985-07-27 | 1986-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-25 | 1989-07-27 | 1990-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-25 | 1993-07-27 | 1994-01-26 | $7700.00 | Window Closed / Lapsed |