GB612240A - Improvements in or relating to photographic dark room lamps - Google Patents
Improvements in or relating to photographic dark room lampsInfo
- Publication number
- GB612240A GB612240A GB1534046A GB1534046A GB612240A GB 612240 A GB612240 A GB 612240A GB 1534046 A GB1534046 A GB 1534046A GB 1534046 A GB1534046 A GB 1534046A GB 612240 A GB612240 A GB 612240A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shutter
- dark room
- lamp
- relating
- room lamps
- 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
- G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
- G03D17/00—Dark-room arrangements not provided for in the preceding groups; Portable dark-rooms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
Abstract
612,240. Dark room lamps. SIMPSON, G. E. May 21, 1946. No. 15340. [Class 75 (iv)] A dark room lamp in which is secured an electric lamp socket d comprises a self-supporting casing a having an aperture covered by a colour filter shutter I divided into four coloured segments m, n, o, p, a knob t being provided on the outside of the lamp for rotating the shutter I so that any one of the coloured segments m, n, o, p can be made to cover the aperture. The lamp is universally mounted and has its ventilating holes y masked by a light-trapping screen z. A spring catch holds the shutter in the position to which it is set. According to the Provisional Specification the shutter may be operated by a plunger and ratchet mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1534046A GB612240A (en) | 1946-05-21 | 1946-05-21 | Improvements in or relating to photographic dark room lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1534046A GB612240A (en) | 1946-05-21 | 1946-05-21 | Improvements in or relating to photographic dark room lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB612240A true GB612240A (en) | 1948-11-10 |
Family
ID=10057372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1534046A Expired GB612240A (en) | 1946-05-21 | 1946-05-21 | Improvements in or relating to photographic dark room lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB612240A (en) |
-
1946
- 1946-05-21 GB GB1534046A patent/GB612240A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES420593A1 (en) | Lighting fixture lens | |
| GB629266A (en) | Improvements in colour filters and projection apparatus for using such filters | |
| GB1093731A (en) | Improvements in photographic camera shutters | |
| GB612240A (en) | Improvements in or relating to photographic dark room lamps | |
| GB898236A (en) | Electric pointer | |
| GB1348711A (en) | Camera which has built in or attachable flash apparatus | |
| US2258014A (en) | Illuminating device for enlarging or projecting apparatus | |
| GB774735A (en) | Improvements in or relating to clocks | |
| GB696468A (en) | Improvements in circuit-arrangements for igniting photographic flash-bulbs | |
| GB710983A (en) | Improvements relating to reflectors for electric lamps | |
| GB623092A (en) | Photographic lighting and control apparatus | |
| JPS54115586A (en) | Shade of lighting fixture | |
| GB747476A (en) | Improvements in or relating to operating-theatre lighting apparatus | |
| GB1101235A (en) | Improvements relating to photographic exposure control | |
| GB554183A (en) | Improvements in or relating to lamps | |
| GB1241045A (en) | Photographic darkroom safelight | |
| GB534848A (en) | Improvements in or relating to obscuring vehicle lights | |
| GB752772A (en) | Improvements in and relating to photographic apparatus | |
| ES224737A1 (en) | An electrical apparatus for printing signals in photographic negatics (Machine-translation by Google Translate, not legally binding) | |
| JPS5320974A (en) | Electronic watch with alarm | |
| ES25437U (en) | Transparency projection device (Machine-translation by Google Translate, not legally binding) | |
| GB775699A (en) | Improvements in or relating to table lamps | |
| GB500655A (en) | Improvements in and relating to anti-dazzle devices | |
| ES14358U (en) | Lamp or screen with movable figures. (Machine-translation by Google Translate, not legally binding) | |
| GB759923A (en) | Improvements in or relating to colour changing mechanism for signalling lamps |