GB836055A - Improvements in or relating to electric lighting fittings incorporating spotlight reflectors - Google Patents
Improvements in or relating to electric lighting fittings incorporating spotlight reflectorsInfo
- Publication number
- GB836055A GB836055A GB1963657A GB1963657A GB836055A GB 836055 A GB836055 A GB 836055A GB 1963657 A GB1963657 A GB 1963657A GB 1963657 A GB1963657 A GB 1963657A GB 836055 A GB836055 A GB 836055A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spherical
- aperture
- reflector
- ellipsoidal
- focus
- 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
Abstract
836,055. Reflectors. GENERAL ELECTRIC CO. Ltd. April 10, 1958 [June 21, 1957], No. 19636/57. Class 97(1) [Also in Group XI] A reflector for reflecting light from an electric lamp into a beam of limited solid angle comprises a first part A of substantially ellipsoidal form continued by a second part B substantially of spherical form centred on the first focus of the ellipsoid and provided with an aperture for the emergence of the beam of light from the reflector. The sides of the aperture in a support member R provide a bearing surface for the spherical part of the reflector permitting an appreciable amount of universal rotation. The reflector may be continued by a skirt C further to reduce the solid angle of the reflected beam. The plane dividing the ellipsoidal part from the part spherical part passes through or near the first focus of the ellipse and the light source is arranged at the same point. The aperture in the part spherical part B is determined by the lines joining the junction of the ellipsoidal and spherical parts to the second focus of the ellipse. The ellipsoidal part may have an aperture or extension D for insertion of an electric lamp L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1963657A GB836055A (en) | 1957-06-21 | 1957-06-21 | Improvements in or relating to electric lighting fittings incorporating spotlight reflectors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1963657A GB836055A (en) | 1957-06-21 | 1957-06-21 | Improvements in or relating to electric lighting fittings incorporating spotlight reflectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB836055A true GB836055A (en) | 1960-06-01 |
Family
ID=10132662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1963657A Expired GB836055A (en) | 1957-06-21 | 1957-06-21 | Improvements in or relating to electric lighting fittings incorporating spotlight reflectors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB836055A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2206707A (en) * | 1987-07-10 | 1989-01-11 | Medical Res Council | Light collecting device for flow cytometry |
-
1957
- 1957-06-21 GB GB1963657A patent/GB836055A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2206707A (en) * | 1987-07-10 | 1989-01-11 | Medical Res Council | Light collecting device for flow cytometry |
| GB2206707B (en) * | 1987-07-10 | 1991-07-03 | Medical Res Council | Light collecting device |
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