GB1248445A - Improvement in or relating to lamps - Google Patents
Improvement in or relating to lampsInfo
- Publication number
- GB1248445A GB1248445A GB47196/68A GB4719668A GB1248445A GB 1248445 A GB1248445 A GB 1248445A GB 47196/68 A GB47196/68 A GB 47196/68A GB 4719668 A GB4719668 A GB 4719668A GB 1248445 A GB1248445 A GB 1248445A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ring
- mask
- cup
- focal
- parabola
- 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
-
- 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)
Abstract
1,248,445. Vehicle headlamp. PROJECTEURS CIBIE. 4 Oct., 1968 [5 Oct., 1967], No. 47196/68. Heading F4R. A lamp with a masked beam comprises a reflector having an upper zone and a lower zone respectively generated by rotation about a central axis of two parabolic generatrices with focal rings which are eccentric to the central axis and which lie in planes perpendicular to the axis and pass respectively through one or the other end of a light source which is in the form of a cylinder tangential to the axis. A reflector 2 is constituted by two parabolic surfaces 2a, 2b. The surface 2a is generated by rotation about central axis AA of the parabola Pa having a focus Fa which forms a focal ring (fa, Fig. 1 not shown) when the parabola Pa is rotated. The surface 2b is likewise formed from parabola Pb having a focus Fb and a focal ring (fb, Fig. 1). A mask is provided around the light source 1, part of the mask 3a being cup-shaped with its front edge lying along the focal ring (fa) and the cup extending behind the ring. Another part of the mask 3b is cup-shaped with its rear lying along the other focal ring (fb) with the cup exstending in front of the ring. The mask also has sides (4, 5) which join parts 3a and 3b and shield the side of the source 1.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR123362A FR1545880A (en) | 1967-10-05 | 1967-10-05 | New improvements to cut-beam headlamps, especially low beam headlamps for motor vehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1248445A true GB1248445A (en) | 1971-10-06 |
Family
ID=8639548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB47196/68A Expired GB1248445A (en) | 1967-10-05 | 1968-10-04 | Improvement in or relating to lamps |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1801304C3 (en) |
FR (1) | FR1545880A (en) |
GB (1) | GB1248445A (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 (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3764797A (en) * | 1972-04-27 | 1973-10-09 | Minnesota Mining & Mfg | Vehicle headlight |
US4149229A (en) * | 1976-06-18 | 1979-04-10 | Lucas Industries Limited | Lamp reflector with downwardly-facing step |
FR2599121B1 (en) * | 1986-05-26 | 1988-09-16 | Cibie Projecteurs | OFFSET MIXED CROSSING PROJECTOR |
-
1967
- 1967-10-05 FR FR123362A patent/FR1545880A/en not_active Expired
-
1968
- 1968-10-04 GB GB47196/68A patent/GB1248445A/en not_active Expired
- 1968-10-04 DE DE1801304A patent/DE1801304C3/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 |
---|---|
FR1545880A (en) | 1968-11-15 |
DE1801304A1 (en) | 1969-05-22 |
DE1801304C3 (en) | 1974-08-29 |
DE1801304B2 (en) | 1974-02-07 |
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