GB511887A - Improvements in photographic flash lamps - Google Patents
Improvements in photographic flash lampsInfo
- Publication number
- GB511887A GB511887A GB1468838A GB1468838A GB511887A GB 511887 A GB511887 A GB 511887A GB 1468838 A GB1468838 A GB 1468838A GB 1468838 A GB1468838 A GB 1468838A GB 511887 A GB511887 A GB 511887A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thin
- thick
- sheets
- piece
- metal
- 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
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K5/00—Light sources using charges of combustible material, e.g. illuminating flash devices
- F21K5/02—Light sources using charges of combustible material, e.g. illuminating flash devices ignited in a non-disrupting container, e.g. photo-flash bulb
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
511,887. Flash-light lamps. GENERAL ELECTRIC CO., Ltd., and DOXEY, F. W. May 17, 1938, No. 14688. [Class 9 (ii)] Relates to a photographic flash lamp of the type comprising a sealed vitreous envelope containing sheets, bands or wire of highly oxidizable metal, e.g., aluminium, and oxidizing gas, e.g., oxygen, at a pressure below atmospheric, and means for igniting the said metal so that it burns readily in the said gas. According to the invention, part of the oxidizable metal is in the form of thin sheets and part in the form of thicker material, the ratio of the weight of the thicker material to that of the thin sheets lying between 1 and 5. The thick metal is also preferably in the form of sheets whose thickness is about twice that of the thin sheets. The thicker material may, however, be in the form of wire or strip. According to one embodiment, the thin sheet is all in one piece and is placed immediately adjacent the igniting means. The thick sheet is in 'three pieces and is placed round the thin sheet. In an alternative embodiment, both the thick and the thin sheets are divided into two pieces,. one thin piece being placed adjacent the igniting means, a thick piece outside it, a thin piece outside that and lastly a thick piece. Specifications 491,206 and 507,880 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1468838A GB511887A (en) | 1938-05-17 | 1938-05-17 | Improvements in photographic flash lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1468838A GB511887A (en) | 1938-05-17 | 1938-05-17 | Improvements in photographic flash lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB511887A true GB511887A (en) | 1939-08-25 |
Family
ID=10045786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1468838A Expired GB511887A (en) | 1938-05-17 | 1938-05-17 | Improvements in photographic flash lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB511887A (en) |
-
1938
- 1938-05-17 GB GB1468838A patent/GB511887A/en not_active Expired
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