GB1253055A - - Google Patents
Info
- Publication number
- GB1253055A GB1253055A GB1253055DA GB1253055A GB 1253055 A GB1253055 A GB 1253055A GB 1253055D A GB1253055D A GB 1253055DA GB 1253055 A GB1253055 A GB 1253055A
- Authority
- GB
- United Kingdom
- Prior art keywords
- central axis
- paraboloidal
- mirror
- recuperative
- lie
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
- F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
- F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
1,253,055. Vehicle headlamp. PROJECTEURS CIBIE. 8 Oct., 1968 [10 Oct., 1967],No. 47631/68. Heading F4R. A lamp comprises a reflector constituted by a series of parabolic surfaces of revolution disposed about a central axis and a cylindrical illumination source lying tangential at its lower surface to the central axis, the surfaces comprising a main paraboloidal mirror limited by two axial planes and having its focus on the central axis and an upper and a lower recuperative mirror. The light source 2 lies touching the central axis AA and the focus F of the paraboloidal main mirror 1 lies on the axis in the vicinity of the centre of the source 2. The main mirror 1 is limited by a horizontal plane (P 1 ) and an inclined plane (P 2 ) both passing through the axis AA and inclined to one another at 15 degrees (Fig. 2, not shown). The recuperative mirrors 3 and 4 are both paraboloidal having foci F 3 and F 4 respectively. The inclination of the two planes (P 1 , P 2 ) is determined according to whether the headlamps are used for left-hand or right-hand drive. In another embodiment (Figs. 4, 5 and 6, not shown) the two paraboloidal recuperative mirrors (13, 14) are described by the generation of parabolae whose respective foci do not lie on the central axis but form focal rings (f 13 , f 14 ) on generation. The focal rings lie respectively above and below the central axis and quarter-cup shaped masks (13a, 14a) are provided which respectively lie on and behind one of the rings and on and in front of the other. The sides of the masks are limited in accordance with the inclination of the planes which limit the main mirror.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR123829A FR1546698A (en) | 1967-10-10 | 1967-10-10 | Improvements to low beam headlamp reflectors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1253055A true GB1253055A (en) | 1971-11-10 |
Family
ID=8639786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1253055D Expired GB1253055A (en) | 1967-10-10 | 1968-10-08 |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1546698A (en) |
GB (1) | GB1253055A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2150684A (en) * | 1983-11-09 | 1985-07-03 | Westfaelische Metall Industrie | Dipped vehicle headlamp |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2536502B1 (en) * | 1982-11-19 | 1987-01-09 | Cibie Projecteurs | CROSSING PROJECTOR FOR MOTOR VEHICLE |
JPS6486401A (en) * | 1987-09-29 | 1989-03-31 | Koito Mfg Co Ltd | Head light of vehicle |
-
1967
- 1967-10-10 FR FR123829A patent/FR1546698A/en not_active Expired
-
1968
- 1968-10-08 GB GB1253055D patent/GB1253055A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2150684A (en) * | 1983-11-09 | 1985-07-03 | Westfaelische Metall Industrie | Dipped vehicle headlamp |
US4612608A (en) * | 1983-11-09 | 1986-09-16 | Westfalische Metall Industrie Kg Hueck & Co. | Dimmed vehicle headlight |
Also Published As
Publication number | Publication date |
---|---|
DE1802113A1 (en) | 1969-05-29 |
FR1546698A (en) | 1968-11-22 |
DE1802113B2 (en) | 1976-02-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |