Patent US4288847A successfully refreshed from Google Patents.
US4288847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound beam illuminating
Assignee: Individual
•
Filing: 1979-06-18
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Granted: 1981-09-08
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Expires: 1999-06-18
Abstract
Abstract A light source is disposed within a light reflector formed to direct a light beam through an open end of the reflector and light controlling means for projecting a modified light beam from the same reflector.
Inventors
- 👤 William B. Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:08
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/08; F21S8/085; F21S8/086; F21V; F21V7/00; F21V7/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 words
A luminaire comprising, a light source, a relatively opaque reflector having a principal light emitting opening, said light source being disposed within said reflector for directing a first primary light beam through said opening in a first principal direction of maximum illumination, and light moderating means in said reflector for directing a second secondary light beam in a direction of lesser illumination substantially orthogonal to said first principal direction and with a predetermined beam expanse extending beyond the boundaries of said first primary light beam.
Claim 2
Dependent Claim
85 words
A luminaire comprising, a light source, a relatively opaque reflector having a principal light emitting opening, said light source being disposed within said reflector for directing a first primary light beam through said opening in a first principal direction of maximum illumination, and light moderating means in said reflector for directing a second secondary light beam in a direction of lesser illumination substantially orthogonal to said first principal direction and with a predetermined beam expanse extending beyond the boundaries of said first primary light beam.
Claim 3
Dependent Claim
20 words
A luminaire according to claim 1 wherein said light limiting means is an aperture in the wall of said reflector.
Claim 4
Dependent Claim
22 words
A luminaire according to claim 2 further including a transparent member assembled in said aperture to exclude weather from entering said reflector.
Claim 5
Dependent Claim
23 words
A luminaire according to claim 2 further including a translucent diffusing member assembled in said aperture to exclude weather from entering said reflector.
Claim 6
Dependent Claim
21 words
A luminaire according to claim 3 wherein said transparent member is transflecting to minimize glare and to preserve high optical efficiency.
Claim 7
Dependent Claim
30 words
A luminaire according to claim 5 wherein said transflecting member is a transparent member with fine reflecting figurations, said figurations contributing to the useful redirection of light by said reflector.
Claim 8
Dependent Claim
20 words
A luminaire according to claim 5 wherein said transflecting member is a reflecting surface provided with a plurality of perforations.
Claim 9
Dependent Claim
36 words
A luminaire according to claim 1, wherein said light limiting means directs said second light beam in said preferred direction so that said light beam is visible at 90° from vertical down to 78° from vertical.
Claim 10
Dependent Claim
36 words
A luminaire according to claim 1, wherein said light limiting means directs said second light beam in said preferred direction so that said light beam is visible at 90° from vertical down to 70° from vertical.
Claim 11
Dependent Claim
28 words
A luminaire according to claim 9 in which said second light beam is visible at least down to that veritcal angle at which said first beam is visible.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |