GB408366A - Improvements in prismatic lighting units - Google Patents
Improvements in prismatic lighting unitsInfo
- Publication number
- GB408366A GB408366A GB3165932A GB3165932A GB408366A GB 408366 A GB408366 A GB 408366A GB 3165932 A GB3165932 A GB 3165932A GB 3165932 A GB3165932 A GB 3165932A GB 408366 A GB408366 A GB 408366A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prisms
- prismatic
- light
- holophane
- class
- 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
- F21V7/00—Reflectors for light sources
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
408,366. Prismatic reflectors. HOLOPHANE, Ltd., and ENGLISH, S., Holophane House, Elverton Street, Vincent Square, London. Nov. 9, 1932, No. 31659. [Class 75 (ii).] In a prismatic reflector having on its inner surface prisms which direct light toward the outer surface at angles such that total reflection takes place at the outer surface, one or both internal faces of such prisms are formed with auxiliary light redirecting prisms 14, corrugations or flutes. The auxiliary prisms may be approximately 90‹ prisms which have sharp or rounded tops and bottoms and refract light symmetrically, or may be formed as the prisms 31 shown in Fig. 6, so as to refract the light sideways. The outer surface of the reflector may be smooth, etched, fluted, rippled, or pebbled. Specifications 315,114, [Class 75 (ii)], and 380,867 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3165932A GB408366A (en) | 1932-11-09 | 1932-11-09 | Improvements in prismatic lighting units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3165932A GB408366A (en) | 1932-11-09 | 1932-11-09 | Improvements in prismatic lighting units |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB408366A true GB408366A (en) | 1934-04-12 |
Family
ID=10326467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3165932A Expired GB408366A (en) | 1932-11-09 | 1932-11-09 | Improvements in prismatic lighting units |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB408366A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2601127A (en) * | 1945-07-02 | 1952-06-17 | Rosenstein Louis | Light control member |
| EP0341996A2 (en) * | 1988-05-10 | 1989-11-15 | Minnesota Mining And Manufacturing Company | Reflector using Fresnel-type structures having a plurality of active faces |
| DE102008035765A1 (en) | 2008-07-31 | 2010-02-04 | Automotive Lighting Reutlingen Gmbh | lighting device |
-
1932
- 1932-11-09 GB GB3165932A patent/GB408366A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2601127A (en) * | 1945-07-02 | 1952-06-17 | Rosenstein Louis | Light control member |
| EP0341996A2 (en) * | 1988-05-10 | 1989-11-15 | Minnesota Mining And Manufacturing Company | Reflector using Fresnel-type structures having a plurality of active faces |
| EP0341996A3 (en) * | 1988-05-10 | 1990-06-27 | Minnesota Mining And Manufacturing Company | Reflector using fresnel-type structures having a plurality of active faces |
| DE102008035765A1 (en) | 2008-07-31 | 2010-02-04 | Automotive Lighting Reutlingen Gmbh | lighting device |
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