FR737019A - Darkening device for headlights - Google Patents
Darkening device for headlightsInfo
- Publication number
- FR737019A FR737019A FR737019DA FR737019A FR 737019 A FR737019 A FR 737019A FR 737019D A FR737019D A FR 737019DA FR 737019 A FR737019 A FR 737019A
- Authority
- FR
- France
- Prior art keywords
- headlights
- darkening device
- darkening
- 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
- 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
- F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
- F21V9/12—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light with liquid-filled chambers
-
- 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
- F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
- F21S41/125—Coloured light
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT737019X | 1931-05-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR737019A true FR737019A (en) | 1932-12-06 |
Family
ID=3680196
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR737019D Expired FR737019A (en) | 1931-05-16 | 1932-05-13 | Darkening device for headlights |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR737019A (en) |
-
1932
- 1932-05-13 FR FR737019D patent/FR737019A/en not_active Expired
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