GB559646A - Improvements in or relating to illuminating devices - Google Patents
Improvements in or relating to illuminating devicesInfo
- Publication number
- GB559646A GB559646A GB9818/42A GB981842A GB559646A GB 559646 A GB559646 A GB 559646A GB 9818/42 A GB9818/42 A GB 9818/42A GB 981842 A GB981842 A GB 981842A GB 559646 A GB559646 A GB 559646A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light source
- reflecting surfaces
- rays
- reflecting
- july
- 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
- F21V7/04—Optical design
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
559,646. Lamp reflectors. PERROT, DUVAL & CIE, SOC. ANON, July 15, 1942, No. 9818. Convention date, July 28, 1941. [Class 75 (ii)] A device for illuminating roads, crossings, workshops halls &c. comprises two metal reflecting surfaces 1, 2 of high reflecting and slight diffusing power so shaped that their radii of curvature increase from the top to the bottom and fitted with a light source L adjustable a'long the optical axis of the reflecting surfaces to positions in which a plane passing through the light source at right angles to the optical axis intersests the lower reflecting surface. The central part of the field below the device is consequently illuminated mainly by the direct rays e from the light source and the more remote parts of the field by the reflected rays a, b, c, d and approximately uniform illumination is obtained without strong lines of demarcation between the zones of direct and reflected-rays. The reflecting surfaces may be made in one piece and may be coloured. In cross section the reflecting surfaces may be circular, elliptical, rectangular, polygonal or trough shaped and the light source may be rectilinear.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH559646X | 1941-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB559646A true GB559646A (en) | 1944-02-29 |
Family
ID=4520194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9818/42A Expired GB559646A (en) | 1941-07-28 | 1942-07-15 | Improvements in or relating to illuminating devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB559646A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2019250A1 (en) * | 2007-07-26 | 2009-01-28 | Lemnis Lighting IP GmbH | Street lighting arrangement |
-
1942
- 1942-07-15 GB GB9818/42A patent/GB559646A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2019250A1 (en) * | 2007-07-26 | 2009-01-28 | Lemnis Lighting IP GmbH | Street lighting arrangement |
| WO2009013320A1 (en) * | 2007-07-26 | 2009-01-29 | Innolumis Public Lighting B.V. | Street lighting arrangement |
| US8210706B2 (en) | 2007-07-26 | 2012-07-03 | Innolumis Public Lighting B.V. | Street lighting arrangement |
| US8388174B2 (en) | 2007-07-26 | 2013-03-05 | Lemnis Lighting Patent Holding B.V. | Lighting arrangement |
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