Patent US5126160A successfully refreshed from Google Patents.
Patent US4383289A successfully refreshed from Google Patents.
US4383289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Task lighting fixture for concentrating illumination
Assignee: Individual
•
Filing: 1980-12-15
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Granted: 1983-05-10
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Expires: 2000-12-15
Abstract
Abstract A task lighting fixture is provided for concentrating illumination on a work area beneath and offset to the side of the fixture. To accomplish this, an open reflector having a specular surface is mounted above and off to one side of the area to be illuminated. Transverse parallel vertical cross sections of the fixture are identical and comprise short and long compound curves joined together to form a cusp. The long compound curve extends toward the work area on which the illumination is to be concentrated. A U-shaped fluorescent bulb has each leg parallel to the cusp and the axes of the legs each are located on lines dissecting the cusp of the reflector.
Inventors
- 👤 Ian Lewin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:58
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21W; F21W2131/00; F21W2131/40; F21W2131/402; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/37
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
A lamp fixture for concentrating illumination on a work area beneath and offset to the side of the fixture including in combination: an open reflector, the transverse parallel vertical cross-sections of which are identical and comprise short and long compound curves joined together to form a cusp, with the long compound curve thereof extending toward the work area on which illumination is to be concentrated; and at least one elongated fluorescent bulb with its axis parallel to the cusp of said reflector and the axis thereof located on a line dissecting the cusp of said reflector, said line being substantially parallel to the offset beam of light produced by the fixture.
Claim 2
Dependent Claim
111 words
A lamp fixture for concentrating illumination on a work area beneath and offset to the side of the fixture including in combination: an open reflector, the transverse parallel vertical cross-sections of which are identical and comprise short and long compound curves joined together to form a cusp, with the long compound curve thereof extending toward the work area on which illumination is to be concentrated; and at least one elongated fluorescent bulb with its axis parallel to the cusp of said reflector and the axis thereof located on a line dissecting the cusp of said reflector, said line being substantially parallel to the offset beam of light produced by the fixture.
Claim 3
Dependent Claim
38 words
The combination according to claim 1 further including a second elongated fluorescent bulb having its axis parallel to the cusp of said open reflector and the axis thereof located on a line dissecting the cusp of said reflector.
Claim 4
Dependent Claim
23 words
The combination according to claim 2 wherein said elongated fluorescent bulbs comprise the first and second legs, respectively, of a U-shaped fluorescent tube.
Claim 5
Dependent Claim
54 words
The combination according to claim 1 wherein the lamp fixture is a task light arranged to be located above and to one side of a work area and the open reflector is generally parallel to the work area, and the curvatures of said compound curves of said reflector minimize multiple reflections from said bulb.
Claim 6
Dependent Claim
35 words
The combination according to claim 4 further including a second elongated fluorescent bulb with the axis thereof parallel to the cusp of said reflector and located on a line dissecting the cusp of said reflector.
Claim 7
Dependent Claim
23 words
The combination according to claim 5 wherein said at least one fluorescent bulb and said second fluorescent bulb are parallel to one another.
Claim 8
Dependent Claim
30 words
The combination according to claim 6 wherein said at least one fluorescent bulb and said second fluorescent bulb comprise the first and second legs of a single U-shaped fluorescent tube.
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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |