US4460945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminaire shield
Assignee: Southern California Edison Co
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Filing: 1982-09-30
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Granted: 1984-07-17
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Expires: 2002-09-30
Abstract
Abstract A luminaire shield, particularly for protecting street lights from breakage by vandals includes a laminate plate mounted in spaced relationship from the lens of the luminaire. Heat can thereby escape between an air gap and between the light source housing and the shield, and the shield extends beyond the lens with a tail portion covering the electrical converter (ballast) mounted within the luminaire housing, such that this is also protected.
Inventors
- 👤 Alexius C. Chan
- 👤 Phillip L. Wheeler
- 👤 Lloyd H. Chandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
F; F21; F21V; F21V15/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
A luminaire comprising a housing for a light source, said light source including an electric converter element, a lamp socket for receiving a lamp, a light diffusing lens mounted in an aperture in the housing, and a transparent laminate shield mounted on the bottom of the housing remote from the light source, and with the lens between the light source and shield, the shield being spaced from the lens about at least part of the shield perimeter to form a vent between said part of the perimeter and the lens whereby heat generated by the light source is permitted to escape through said vent, said shield having a planar surface substantially parallel to the light diffusing lens, and extending to protect the electric converter element, said shield being of a thickness sufficient to protect the lens and converter element against a firearm projectile.
Claim 2
Dependent Claim
143 words
A luminaire comprising a housing for a light source, said light source including an electric converter element, a lamp socket for receiving a lamp, a light diffusing lens mounted in an aperture in the housing, and a transparent laminate shield mounted on the bottom of the housing remote from the light source, and with the lens between the light source and shield, the shield being spaced from the lens about at least part of the shield perimeter to form a vent between said part of the perimeter and the lens whereby heat generated by the light source is permitted to escape through said vent, said shield having a planar surface substantially parallel to the light diffusing lens, and extending to protect the electric converter element, said shield being of a thickness sufficient to protect the lens and converter element against a firearm projectile.
Claim 3
Dependent Claim
21 words
A luminaire as claimed in claim 1 wherein the shield is spaced from the lens by means of washer type elements.
Claim 4
Dependent Claim
122 words
A luminaire comprising a housing for a light source, said light source including an electric converter element, a lamp socket for receiving a lamp, a light diffusing lens mounted in an aperture in the housing, and a transparent laminate shield mounted on the bottom of the housing remote from the light source, and with the lens between the light source and shield, the shield being spaced from the lens about at least part of the shield perimeter to form a vent between said part of the perimeter and the lens whereby heat generated by the light source is permitted to escape through said vent, said shield being of a thickness sufficient to protect the lens and converter element against a firearm projecticle.
Claim 5
Dependent Claim
122 words
A luminaire comprising a housing for a light source, said light source including an electric converter element, a lamp socket for receiving a lamp, a light diffusing lens mounted in an aperture in the housing, and a transparent laminate shield mounted on the bottom of the housing remote from the light source, and with the lens between the light source and shield, the shield being spaced from the lens about at least part of the shield perimeter to form a vent between said part of the perimeter and the lens whereby heat generated by the light source is permitted to escape through said vent, said shield being of a thickness sufficient to protect the lens and converter element against a firearm projecticle.
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) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |