Patent US4551790A successfully refreshed from Google Patents.
US4551790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light ramp for lighting instrument panels, more especially in aircraft or helicopter
Assignee: D'EXPLOITATION DU LABORATOIRE ABADIE ROUTE DE TARBES Ste
•
Filing: 1983-06-13
•
Granted: 1985-11-05
•
Expires: 2003-06-13
Abstract
Abstract A light ramp for lighting instrument panels, more especially in aircraft or helicopters, characterized in that it comprises, in combination, at least one fluorescent tube (5) emitting in the ultra-violet spectrum, housed inside a frame (6) disposed in front of the instrument panel (1), and a plate made from Wood's glass (7) sealingly fixed to the frame (6) in front of said fluorescent tube (5).
Inventors
- 👤 Jean Benquey
- 👤 Louisa F. Benquey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:27
CPC Classifications
B; B60; B60Q; B60Q3/00; B60Q3/10; B60Q3/14; B60Q3/60; B60Q3/68
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
83 words
A light ramp for lighting instrument panels comprising a frame disposed in front of said panel, at least one fluorescent tube mounted to said frame for emitting ultra-violet light toward said panel, a filter plate sealingly fixed to said frame and extending between said panel and said fluorescent tube for filtering a portion of said ultra-violet light, and an additional fluorescent tube mounted to said frame in a spaced relation to said one fluorescent tube for emitting additional unfiltered light towards said panel.
Claim 2
Dependent Claim
83 words
A light ramp for lighting instrument panels comprising a frame disposed in front of said panel, at least one fluorescent tube mounted to said frame for emitting ultra-violet light toward said panel, a filter plate sealingly fixed to said frame and extending between said panel and said fluorescent tube for filtering a portion of said ultra-violet light, and an additional fluorescent tube mounted to said frame in a spaced relation to said one fluorescent tube for emitting additional unfiltered light towards said panel.
Claim 3
Dependent Claim
59 words
The light ramp according to claim 1 further comprising deflector means mounted on said frame and extending between said filter plate and said panel and provided with appropriate cutouts to selectively block portions of the light from said one fluorescent tube passing through said filter plate in a manner to provide uniform lighting of the surface of said panel.
Claim 4
Dependent Claim
55 words
The light ramp according to claim 1 further comprising deflector means mounted on said frame and extending between said panel and said additional fluorescent tube and provided with appropriate cutouts to selectively block portions of the light from said additional fluorescent tube in a manner to provide uniform lighting of the surface of said panel.
References Cited (Backward Citations)
US1685421A
Cited
US1786768A
Cited
US1947377A
Cited
US1951783A
Cited
US2806936A
Cited
US2874269A
Cited
US2963571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |