GB411170A - Improvements in and relating to projector lamp systems - Google Patents
Improvements in and relating to projector lamp systemsInfo
- Publication number
- GB411170A GB411170A GB7609/33A GB760933A GB411170A GB 411170 A GB411170 A GB 411170A GB 7609/33 A GB7609/33 A GB 7609/33A GB 760933 A GB760933 A GB 760933A GB 411170 A GB411170 A GB 411170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflector
- chimney
- filament
- projected
- directed
- 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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
411,170. Projector lamps. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London, LUCAS, G. S. C., 75, Eastlands Road, and MAYO, C. G., 17, Alexandra Road, both in Rugby. March 13, 1933, No. 7609. [Class 75 (iv).] In a projector lamp, the greater part of the radiant heat from the light source which is not projected in the light beam is directed by a reflector on to a surface from which the heat can be readily dissipated. In the form shown, the filament 2 is arranged approximately at the focus of a substantially parabolic reflector 1 whereby its radiant heat is directed on to a black body in the form of a truncated inverted cone 6 having radiating fins 7 and arranged below the lamp bulb in the annular space between a polished metal bulb support 4 and a chimney 13. In the plane of the filament, apertures are provided in the reflector 1 and in the chimney 13 to allow the beam of light to be projected by a reflector 10 and a lens 9. A cylindrical reflector 5 may be secured to the outer edge of the reflector 1, and the lamp bulb may be fitted with a cap 11 having a flared part 12 extending into the chimney 13. The black body may be replaced by a tray of water or by a container filled with a substance capable of reversible chemical change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7609/33A GB411170A (en) | 1933-03-13 | 1933-03-13 | Improvements in and relating to projector lamp systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7609/33A GB411170A (en) | 1933-03-13 | 1933-03-13 | Improvements in and relating to projector lamp systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB411170A true GB411170A (en) | 1934-06-07 |
Family
ID=9836397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7609/33A Expired GB411170A (en) | 1933-03-13 | 1933-03-13 | Improvements in and relating to projector lamp systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB411170A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2477957A (en) * | 1945-03-19 | 1949-08-02 | Revere Camera Co | Lamp housing |
| FR2216523A1 (en) * | 1973-02-06 | 1974-08-30 | Original Hanau Quarzlampen |
-
1933
- 1933-03-13 GB GB7609/33A patent/GB411170A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2477957A (en) * | 1945-03-19 | 1949-08-02 | Revere Camera Co | Lamp housing |
| FR2216523A1 (en) * | 1973-02-06 | 1974-08-30 | Original Hanau Quarzlampen |
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