GB831391A - Electric photoflash lamp - Google Patents
Electric photoflash lampInfo
- Publication number
- GB831391A GB831391A GB33933/57A GB3393357A GB831391A GB 831391 A GB831391 A GB 831391A GB 33933/57 A GB33933/57 A GB 33933/57A GB 3393357 A GB3393357 A GB 3393357A GB 831391 A GB831391 A GB 831391A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wires
- plastic
- filament
- plastic material
- photoflash lamp
- 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)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Thermistors And Varistors (AREA)
Abstract
831,391. Photoflash lamps. PATENTTREUHAND GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN. Oct. 30, 1957 [Nov. 7, 1956], No. 33933/57. Class 9(2) A photoflash lamp having a filling of finely divided metal foil or wires in an atmosphere of oxygen or oxygen containing gas is provided with electric ignition means comprising a filament 4 connecting current lead-in wires 2 spaced apart by a body 3 of synthetic plastic material which is rigid at normal temperatures of manufacture and storage. The plastic material may be polymers of epoxy resins or fibreforming polyamides or polyacrylonitriles. Mixtures of polyvinylchloride and artificial resins may also be used. The leads 2 may be embedded in the body 3 while the plastic is still soft before attaching the filament 4. The body 3 may be in bead form or as in Fig. 2 a length of plastic wire or tape. Plastic wire drawn from a reel may be softened by hot air before embedding the wires 2 or the wires may be heated and pressed into the cold plastic. Priming 5 is provided on the filament 4 and an insulating ring 7 secures the outer ends of the wires 2. A cobalt compound may be applied to the body 3 to indicate the presence of water vapour in the bulb.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE831391X | 1956-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB831391A true GB831391A (en) | 1960-03-30 |
Family
ID=6753221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33933/57A Expired GB831391A (en) | 1956-11-07 | 1957-10-30 | Electric photoflash lamp |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB831391A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3285035A (en) * | 1964-06-19 | 1966-11-15 | Gen Electric | Flash lamp |
| US3941555A (en) * | 1974-05-06 | 1976-03-02 | General Electric Company | Non-shorting photoflash lamp |
-
1957
- 1957-10-30 GB GB33933/57A patent/GB831391A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3285035A (en) * | 1964-06-19 | 1966-11-15 | Gen Electric | Flash lamp |
| US3941555A (en) * | 1974-05-06 | 1976-03-02 | General Electric Company | Non-shorting photoflash lamp |
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