US4261028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminaires
Assignee: Individual
•
Filing: 1978-09-21
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Granted: 1981-04-07
•
Expires: 1998-09-21
Abstract
Abstract A street lighting luminaire comprising an elongated semi-cylindrical reflector of parabolic cross-section having opposite ends, and paralumens arranged to obtain a luminous beam whose divergent with respect to a plane normal to said axis varies from one to the other end of said reflector to obtain on the street a lightened area of rectangular cross-section.
Inventors
- 👤 Marie H. H. Adam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:50
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/08; F21S8/085; F21S8/086; F21V; F21V11/00; F21V11/02; F21W; F21W2131/00; F21W2131/10; F21W2131/103; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
64 words
A street lightening luminair comprising an elongated semi-cylindrical reflector of parabolic cross-section having opposite ends and an axis extending between said opposite ends; and paralumens arranged to obtain a luminous beam whose divergence with respect to a plane normal to said axis varies from one to the other end of said reflector to thus obtain on the street a lightened area of rectangular cross-section.
Claim 2
Dependent Claim
64 words
A street lightening luminair comprising an elongated semi-cylindrical reflector of parabolic cross-section having opposite ends and an axis extending between said opposite ends; and paralumens arranged to obtain a luminous beam whose divergence with respect to a plane normal to said axis varies from one to the other end of said reflector to thus obtain on the street a lightened area of rectangular cross-section.
Claim 3
Dependent Claim
42 words
A luminaire as defined in claim 1, wherein said paralumens are constituted by a plurality of identical laminae extending parallel to said axis and normal to said plane and whose height uniformly changes from one to the other of said opposite ends.
Claim 4
Dependent Claim
49 words
A luminaire as defined in claim 2, wherein each of said laminae is constituted by two strips having parallel longitudinal edges and being fixed to one another in a manner so that said longitudinal edges of one of said strips includes an angle with those of the other strip.
Claim 5
Dependent Claim
34 words
A luminaire as defined in claim 1, wherein said paralumens are constituted by identical laminae having parallel edges, said laminae being disposed obliquely with respect to a longitudinal plane of symmetry of said reflector.
Claim 6
Dependent Claim
32 words
A luminaire as defined in claim 1, wherein said reflector has an open bottom end and including a frame connected to said open bottom end, said paralumens being mounted in said frame.
Claim 7
Dependent Claim
52 words
A luminaire as defined in claim 5, wherein said paralumens are constituted by a plurality of planar laminae each having end portions extending normal to the remainder of the respective laminae, and cooperating means on said frame and said end portions of said laminae for releasably attaching said laminae to said frame.
References Cited (Backward Citations)
US2732483A
Cited
AU19004A
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US1773245A
Cited
US1680037A
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FR79800E
Cited
US3133139A
Cited
GB912557A
Cited
FR1307312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |