Patent US4562519A successfully refreshed from Google Patents.
US4562519A
Expired / Lapsed
US
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Headlamp for an automobile
Assignee: Cibie Projecteurs SA
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Filing: 1984-07-31
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Granted: 1985-12-31
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Expires: 2004-07-31
Abstract
Abstract A headlamp for an automobile, capable of emitting a beam of light with a cut-off comprising an elliptical reflector having two focii, a light source at the first focus of the reflector, and a convergent lens located opposite the reflector with respect to the second focus. The lens and the reflector have a common optical axis and the focus of the lens is at the second focus of the reflector. A screen is located at the common focus having an edge close to the optical axis in order to define the cut-off beam. Localized deflector elements are provided at the upper part and the lower part of the lens to produce a lateral dispersion and/or a lowering of the light passing through these parts of the lens in order to reduce the effects of the chromatic aberrations in the vicinity of the cut-off.
Inventors
- 👤 Patrick Deves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:27
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/30; F21S41/32; F21S41/321; F21S41/20; F21S41/25; F21S41/255; F21S41/275
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
247 words
A headlamp for an automobile, capable of emitting a beam of light with a cut-off, said headlamp comprising: a part-ellipsoidal reflector having a substantially horizontal optical axis, a first focus on said axis relatively close to said reflector and a second focus on the axis relatively distant from said reflector; a light source located in the vicinity of said first focus of said reflector; a convergent lens arranged opposite said reflector with respect to said second focus of said reflector, said lens being arranged in a substantially vertical plane and having a substantially horizontal optical axis in common with that of said reflector and a focus in the vicinity of said second focus of said reflector; a substantially vertical masking screen with a generally horizontal cut-off edge arranged in the vicinity of said focus of said lens and having its said cut-off edge close to the common optical axis in order to define a substantially horizontally cut-off beam, and spaced apart localized deflector elements in the vicinity of said lens at its upper part and at its lower part to produce a deflection of the light passing through said upper and lower parts of said lens in order to reduce the effects of chromatic aberrations in the vicinity of said cut-off, each of said deflector elements being substantially contiguous with the adjacent edge of the lens at its outer edge and having a substantially horizontal inner edge, said inner edges defining a deflector free lens area therebetween.
Claim 2
Dependent Claim
247 words
A headlamp for an automobile, capable of emitting a beam of light with a cut-off, said headlamp comprising: a part-ellipsoidal reflector having a substantially horizontal optical axis, a first focus on said axis relatively close to said reflector and a second focus on the axis relatively distant from said reflector; a light source located in the vicinity of said first focus of said reflector; a convergent lens arranged opposite said reflector with respect to said second focus of said reflector, said lens being arranged in a substantially vertical plane and having a substantially horizontal optical axis in common with that of said reflector and a focus in the vicinity of said second focus of said reflector; a substantially vertical masking screen with a generally horizontal cut-off edge arranged in the vicinity of said focus of said lens and having its said cut-off edge close to the common optical axis in order to define a substantially horizontally cut-off beam, and spaced apart localized deflector elements in the vicinity of said lens at its upper part and at its lower part to produce a deflection of the light passing through said upper and lower parts of said lens in order to reduce the effects of chromatic aberrations in the vicinity of said cut-off, each of said deflector elements being substantially contiguous with the adjacent edge of the lens at its outer edge and having a substantially horizontal inner edge, said inner edges defining a deflector free lens area therebetween.
Claim 3
Dependent Claim
29 words
A headlamp according to claim 1 wherein said deflection of said light passing through said upper and lower parts of said lens constitutes a lateral dispersion of said light.
Claim 4
Dependent Claim
28 words
A headlamp according to claim 1 wherein said deflection of said light passing through said upper and lower parts of said lens constitutes a lowering of said light.
Claim 5
Dependent Claim
16 words
A headlamp according to claim 1 wherein said deflector elements are directly attached to said lens.
Claim 6
Dependent Claim
30 words
A headlamp according to claim 1 further including a transparent glass and wherein said deflector elements are attached to said transparent glass, said transparent glass being juxtaposed to the lens.
Claim 7
Dependent Claim
57 words
A headlamp according to claim 1 wherein said upper and lower parts of said lens associated with said deflector elements are limited to bands which are contiguous respectively with an upper edge and a lower edge of said lens, the height of each of said bands being between 1/10 and 1/4 of the height of said lens.
Claim 8
Dependent Claim
57 words
A headlamp according to claim 2 wherein said upper and lower parts of said lens associated with said deflector elements are limited to bands which are contiguous respectively with an upper edge and a lower edge of said lens, the height of each of said bands being between 1/10 and 1/4 of the height of said lens.
Claim 9
Dependent Claim
57 words
A headlamp according to claim 3 wherein said upper and lower parts of said lens associated with said deflector elements are limited to bands which are contiguous respectively with an upper edge and a lower edge of said lens, the height of each of said bands being between 1/10 and 1/4 of the height of said lens.
Claim 10
Dependent Claim
57 words
A headlamp according to claim 4 wherein said upper and lower parts of said lens associated with said deflector elements are limited to bands which are contiguous respectively with an upper edge and a lower edge of said lens, the height of each of said bands being between 1/10 and 1/4 of the height of said lens.
Claim 11
Dependent Claim
57 words
A headlamp according to claim 5 wherein said upper and lower parts of said lens associated with said deflector elements are limited to bands which are contiguous respectively with an upper edge and a lower edge of said lens, the height of each of said bands being between 1/10 and 1/4 of the height of said lens.
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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) | 1988-12-30 | 1989-07-01 | 1989-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-30 | 1993-07-01 | 1993-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-30 | 1997-07-01 | 1997-12-31 | $7700.00 | Window Closed / Lapsed |