US3701895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined lighting and ventilating fixture
Assignee: Thomas Industries Inc
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Filing: 1971-06-30
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Granted: 1972-10-31
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Expires: 1991-06-30
Abstract
Abstract A luminaire having a housing for mounting in the plenum area above a ceiling and including a reflector supported generally within the housing for reflecting light from a light source supported therein. The housing and reflector establish primary and secondary air flow paths for removing heat from the light source and from ballast means and related electrical components supported by the housing.
Inventors
- 👤 Donald Arthur Sweetser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:49
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/70; F21V29/83; F21S; F21S8/00; F21S8/02; F21V29/502; F21V29/505; F21V33/00; F21V33/0088
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
190 words
A luminaire for a ceiling comprising, in combination, a housing including a casing supported therein and having inclined opposed walls, a light reflector supported within said casing having inclined opposed walls spaced generally parallel to the inclined walls of the casing and defining a narrow air passage therebetween and about the reflector, said air passage and interior of the reflector being vented through the top of the housing, means for supporting a lighting lamp within the interior of the reflector, said housing also supporting heat creating electrical components which are related to the lighting lamp, said components being located outside of said casing, and the inclined walls of the reflector having spaced openings adjacent the lower larger end thereof for admittance of air to said passage from the reflector interior, air entering the luminaire through the lower larger end of the reflector thereby flowing upwardly in separate paths on both sides of the inclined reflector wall and venting through the top of the luminaire housing in order to remove heat created by the related electrical components as heat from the lighting lamp is removed from the interior of the reflector.
Claim 2
Dependent Claim
190 words
A luminaire for a ceiling comprising, in combination, a housing including a casing supported therein and having inclined opposed walls, a light reflector supported within said casing having inclined opposed walls spaced generally parallel to the inclined walls of the casing and defining a narrow air passage therebetween and about the reflector, said air passage and interior of the reflector being vented through the top of the housing, means for supporting a lighting lamp within the interior of the reflector, said housing also supporting heat creating electrical components which are related to the lighting lamp, said components being located outside of said casing, and the inclined walls of the reflector having spaced openings adjacent the lower larger end thereof for admittance of air to said passage from the reflector interior, air entering the luminaire through the lower larger end of the reflector thereby flowing upwardly in separate paths on both sides of the inclined reflector wall and venting through the top of the luminaire housing in order to remove heat created by the related electrical components as heat from the lighting lamp is removed from the interior of the reflector.
Claim 3
Dependent Claim
47 words
The luminaire of claim 1 including means communicating with the top of the housing to effect an air pressure differential therebetween and a space below the housing to establish air flow upwardly through the housing in said separate paths along both sides of the inclined reflector wall.
Claim 4
Dependent Claim
35 words
The luminaire of claim 2 wherein said means to effect an air pressure differential includes negative pressure producing means supported by the luminaire housing in communication with said air passage and interior of the reflector.
Claim 5
Dependent Claim
27 words
The luminaire of claim 1 wherein the interior of the reflector is vented by openings adjacent the upper end of the reflector and above the lighting lamp.
Claim 6
Dependent Claim
39 words
The luminaire of claim 1 wherein the interior of the reflector is vented by spaced openings adjacent the upper end of the inclined reflector wall and the venting of the air passage through the top of the luminaire housing.
Claim 7
Dependent Claim
65 words
The luminaire of claim 1 wherein lens means underlie the lower larger end of the reflector and means are provided at the periphery thereof for admittance of air into the interior of the reflector immediately adjacent the lower end of the reflector inclined wall and below the spaced openings therein which admit air to the passage between the inclined walls of the reflector and casing.
Claim 8
Dependent Claim
30 words
The luminaire of claim 1 wherein a metallic vapor lamp is supported within the reflector and the heat creating electrical components include ballast means in the circuit of said lamp.
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |