GB521973A - Improved lamp holder for projection apparatus - Google Patents
Improved lamp holder for projection apparatusInfo
- Publication number
- GB521973A GB521973A GB34806/38A GB3480638A GB521973A GB 521973 A GB521973 A GB 521973A GB 34806/38 A GB34806/38 A GB 34806/38A GB 3480638 A GB3480638 A GB 3480638A GB 521973 A GB521973 A GB 521973A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- holder
- projection apparatus
- lamp holder
- nov
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2046—Positional adjustment of light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Connecting Device With Holders (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
521,973. Two-part couplings; lamp-holders. SOC. DES TELEPHONES ERICSSON. Nov. 29, 1938, No. 34806. Convention date, Nov. 17. [Class 38 (i)] A removable lamp-holder for projection apparatus to facilitate replacement of the lamp comprises a socket 3 to receive the lamp-cap 2 carried by an insulating body 4 having an enlargement 13 that is outside the lamp chamber 9 so that it can be grasped to remove the holder. Guide pins 5 .. 7, asymmetrically arranged, fit into sockets on the chamber 9 and some or all of them form the electrical connections to the lamp-holder. Ventilation passages 14 may be provided for cooling.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR521973X | 1938-11-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB521973A true GB521973A (en) | 1940-06-05 |
Family
ID=8917575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34806/38A Expired GB521973A (en) | 1938-11-17 | 1938-11-29 | Improved lamp holder for projection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB521973A (en) |
-
1938
- 1938-11-29 GB GB34806/38A patent/GB521973A/en not_active Expired
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