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
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