US4794501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indirect specular lamp
Assignee: Siemens AG
•
Filing: 1986-05-14
•
Granted: 1988-12-27
•
Expires: 2006-05-14
Abstract
Abstract The specular lamp or lighting fixture comprises a fluorescent tube as a light bulb which is arranged largely within a channel-shaped counter-reflector. Cross-lamellae for blanking the light of the fluorescent tube out in the longitudinal direction are seated on the counter-reflector. A channel-shaped main reflector which is designed large, and whose surface is preferably matted, is situated opposite the counter-reflector. A uniform luminance in the radiation region and a compact structure are achieved with the specular lamp. The luminance does not exceed a prescribed value in a prescribed, screened region.
Inventors
- 👤 Christian Bartenbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:43
CPC Classifications
F; F21; F21V; F21V13/00; F21V13/02; F21V13/10; F21V11/00; F21V11/02; F21V7/00; F21V7/0008; F21V7/22; F21V7/24; F21V7/28; F21V7/04; F21V7/09; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/37
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
An indirect specular lamp, comprising: a channel-like shaped counter-reflector; a light bulb arranged within said channel-like shaped counter-reflector and completely screened by it with respect to a front region to be illuminated by the lamp; an at least partially curved main reflector arranged opposite said counter-reflector which is larger than said counter-reflector, said counter-reflector being positioned between said front region and said main reflector; said light bulb being a fluorescent tube; and said counter-reflector being provided with cross-lamellae means at least partially surrounding said light bulb for screening said light bulb in a longitudinal direction of the light bulb.
Claim 2
Dependent Claim
99 words
An indirect specular lamp, comprising: a channel-like shaped counter-reflector; a light bulb arranged within said channel-like shaped counter-reflector and completely screened by it with respect to a front region to be illuminated by the lamp; an at least partially curved main reflector arranged opposite said counter-reflector which is larger than said counter-reflector, said counter-reflector being positioned between said front region and said main reflector; said light bulb being a fluorescent tube; and said counter-reflector being provided with cross-lamellae means at least partially surrounding said light bulb for screening said light bulb in a longitudinal direction of the light bulb.
Claim 3
Dependent Claim
34 words
A specular lamp according to claim 1 wherein a cross sectional generated surface of said main reflector has two circular arc portions joined to one another, said arc portions merging with respective outer portions.
Claim 4
Dependent Claim
21 words
A specular lamp according to claim 2 wherein the main reflector is matted and has a directivity of 20 to 40%.
Claim 5
Dependent Claim
24 words
A specular lamp according to claim 3 wherein said main reflector has a width which is approximately six times a width of said counter-reflector.
Claim 6
Dependent Claim
21 words
A specular lamp according to claim 4 wherein a length of said main reflector is at least equal to its width.
Claim 7
Dependent Claim
20 words
A specular lamp according to claim 5 wherein a length of said main reflector is between 30 and 160 cm.
Claim 8
Dependent Claim
49 words
A specular lamp according to claim 1 wherein a cross-sectional generated surface of said main reflector is mirror-symmetric relative to a center plane through said fluorescent tube and running along the longitudinal direction of said light bulb and wherein the light bulb and counter-reflector lie within the generated surface.
Claim 9
Dependent Claim
130 words
An indirect specular lamp, comprising: a counter-reflector; a light bulb arranged within said counter-reflector and completely screened by it with respect to a front illumination region of the lamp; an at least partially curved main reflector arranged opposite said counter-reflector which is larger than said counter-reflector and which faces the illumination region; said light bulb being a fluorescent tube; said counter-reflector having a channel-like shape and being provided with cross-lamellae means surrounding said light bulb for screening said light bulb in a longitudinal direction of the light bulb and perpendicular to a direction from the counter-reflector to the illumination region; and a cross-sectional generated surface of said main reflector being mirror-symmetric relative to a center plane through said fluorescent tube and running along the longitudinal direction of said light bulb.
Claim 10
Dependent Claim
130 words
An indirect specular lamp, comprising: a counter-reflector; a light bulb arranged within said counter-reflector and completely screened by it with respect to a front illumination region of the lamp; an at least partially curved main reflector arranged opposite said counter-reflector which is larger than said counter-reflector and which faces the illumination region; said light bulb being a fluorescent tube; said counter-reflector having a channel-like shape and being provided with cross-lamellae means surrounding said light bulb for screening said light bulb in a longitudinal direction of the light bulb and perpendicular to a direction from the counter-reflector to the illumination region; and a cross-sectional generated surface of said main reflector being mirror-symmetric relative to a center plane through said fluorescent tube and running along the longitudinal direction of said light bulb.
Claim 11
Dependent Claim
33 words
A specular lamp according to claim 8 wherein a cross-sectional generated surface of said main reflector has two circular arc portions joined to one another, said arc portions merging with respective outer portions.
Claim 12
Dependent Claim
13 words
A specular lamp according to claim 9 wherein the outer portions are straight.
Claim 13
Dependent Claim
13 words
A specular lamp according to claim 9 wherein the outer portions are parabolic.
References Cited (Backward Citations)
US2219383A
Cited
US3671735A
Cited
DE2420022A1
Cited
US4006355A
Cited
US4310876A
Cited
US4414609A
Cited
DE3440028A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |