GB548978A - Improvements relating to fluorescent electric discharge lamps - Google Patents
Improvements relating to fluorescent electric discharge lampsInfo
- Publication number
- GB548978A GB548978A GB854041A GB854041A GB548978A GB 548978 A GB548978 A GB 548978A GB 854041 A GB854041 A GB 854041A GB 854041 A GB854041 A GB 854041A GB 548978 A GB548978 A GB 548978A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- soda
- group
- fluid
- electric discharge
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
548,978. Glass manufacture. BRITISH THOMSON-HOUSTON CO., Ltd., and STANWORTH, J. E. July 7, 1941, No. 8540. [Class 56] [Also in Group XL] To prevent poisoning of the luminescent material applied to the envelope of an electron discharge lamp where the envelope is of a soda-containing glass, this is treated by a fluid capable of removing the soda and leaving a film of a substantially pure silica. The fluid may be sulphur dioxide and air applied during annealing. With a glass containing a high percentage of lead or barium, dilute nitric acid may be used ; an example of such a composition is silica 40, barium oxide 40, boric oxide 5, alumina 5, soda 10. In either method the glass is washed after treatment with the fluid. Specifications 453,507, [Group XX], and 523,849, [Group XL], are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB854041A GB548978A (en) | 1941-07-07 | 1941-07-07 | Improvements relating to fluorescent electric discharge lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB854041A GB548978A (en) | 1941-07-07 | 1941-07-07 | Improvements relating to fluorescent electric discharge lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB548978A true GB548978A (en) | 1942-11-02 |
Family
ID=9854412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB854041A Expired GB548978A (en) | 1941-07-07 | 1941-07-07 | Improvements relating to fluorescent electric discharge lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB548978A (en) |
-
1941
- 1941-07-07 GB GB854041A patent/GB548978A/en not_active Expired
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