GB830354A - Improvements in or relating to vehicle lamps - Google Patents
Improvements in or relating to vehicle lampsInfo
- Publication number
- GB830354A GB830354A GB26921/56A GB2692156A GB830354A GB 830354 A GB830354 A GB 830354A GB 26921/56 A GB26921/56 A GB 26921/56A GB 2692156 A GB2692156 A GB 2692156A GB 830354 A GB830354 A GB 830354A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prism
- nearside
- sept
- road
- quadrant
- 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
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
-
- 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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/28—Cover glass
-
- 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
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
830,354. Vehicle headlamps. WESTFALISCHE METALL - INDUSTRIE G.m.b.H. Sept. 3, 1956 [Sept. 2, 1955], No. 26921/56. Class 75(2) To provide for better illumination of the nearside of the road, a vehicle headlamp, of the kind providing a dipped beam from an axial helical bulb filament shielded from below and disposed in advance of the focus of a parabolic reflector, has its cover glass formed, only on the upper offside quadrant, with a compound prism 3 comprising a circumferential prism 6, concentric with the lamp glass centre to elevate the rays of the dipped beam, and a radial prism 7 superimposed thereon to deflect the elevated rays towards the nearside of the road. As shown, the compound prism is formed on the outer peripheral zone of the quadrant, and the radial prism 7 is in two steps 4, 5. The surface of the compound prism may have dispersing flutes or ridges 15 which are effective in a direction parallel to the offside cut-off line of the beam, said line being depressed from the horizontal nearside cut-off by suitable ridgings of the cover glass separated along the regions 13, 14.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE830354X | 1955-09-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB830354A true GB830354A (en) | 1960-03-16 |
Family
ID=6749821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26921/56A Expired GB830354A (en) | 1955-09-02 | 1956-09-03 | Improvements in or relating to vehicle lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB830354A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3531221A1 (en) * | 1985-08-31 | 1987-03-05 | Bosch Gmbh Robert | HEADLIGHTS FOR LOW BEAMS OF MOTOR VEHICLES |
-
1956
- 1956-09-03 GB GB26921/56A patent/GB830354A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3531221A1 (en) * | 1985-08-31 | 1987-03-05 | Bosch Gmbh Robert | HEADLIGHTS FOR LOW BEAMS OF MOTOR VEHICLES |
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