GB111041A - Improvements in or relating to Light Projection Apparatus. - Google Patents
Improvements in or relating to Light Projection Apparatus.Info
- Publication number
- GB111041A GB111041A GB5028/17A GB502817A GB111041A GB 111041 A GB111041 A GB 111041A GB 5028/17 A GB5028/17 A GB 5028/17A GB 502817 A GB502817 A GB 502817A GB 111041 A GB111041 A GB 111041A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflector
- light
- focus
- lamp bulb
- prisms
- 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
- 239000011521 glass Substances 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 241001465382 Physalis alkekengi Species 0.000 abstract 1
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
- F21V5/00—Refractors for light sources
-
- 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
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
-
- 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
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
-
- 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)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
111,041. Ames, A. Dec. 6, 1016. Vehicular lanterns.-In an automobile or like headlight, the source of light is positioned with respect to the focus of the reflector so as to obtain a concentrated horizontal beam with a slight divergence, the rays of light from approximately one half of the reflector being reflected horizontally or downwardly whilst those rays from the other half of the reflector, which would otherwise be projected upwardly, are deflected downwardly by refracting-means interposed in their path after they strike the reflector. In one form, the refracting-means comprise horizontally disposed prisms 112, Fig. 3, arranged on the upper part of the lantern front and extending in some cases below the lamp bulb. The V-shaped or conical light source 122 is arranged behind the focus of a paraboloidal reflector P with its apex in the focus, and the centre of the lamp bulb is behind the filament. A depending reflecting or non-reflecting apron 113 having horizontal extensions 114 on each side of the lamp bulb prevents light, which radiates horizontally, from being reflected upwardly. In a modification, the prisms 103, Fig. 2, are arranged concentrically, and the intermediate part of the glass front may be frosted as shown at 106. In the same modification, the lower leg of the V.shaped light source is arranged along the axis of the reflector. In a second form, the source of light is in front of the focus of the reflector instead of behind it, and the prisms are arranged on the lower instead of the upper part of the glass front, the apron extending upwardly instead of downwardly. The centre of the lamp bulb is in front of the filament. Specification 108,988 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5028/17A GB111041A (en) | 1916-12-06 | 1916-12-06 | Improvements in or relating to Light Projection Apparatus. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5028/17A GB111041A (en) | 1916-12-06 | 1916-12-06 | Improvements in or relating to Light Projection Apparatus. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB111041A true GB111041A (en) | 1917-11-15 |
Family
ID=32407697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5028/17A Expired GB111041A (en) | 1916-12-06 | 1916-12-06 | Improvements in or relating to Light Projection Apparatus. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB111041A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2372236A1 (en) * | 2010-03-23 | 2011-10-05 | Hella KGaA Hueck & Co. | Lens element for assembly in a headlamp of a vehicle |
-
1916
- 1916-12-06 GB GB5028/17A patent/GB111041A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2372236A1 (en) * | 2010-03-23 | 2011-10-05 | Hella KGaA Hueck & Co. | Lens element for assembly in a headlamp of a vehicle |
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