GB465077A - Improvements in or relating to glasses for electric discharge devices - Google Patents
Improvements in or relating to glasses for electric discharge devicesInfo
- Publication number
- GB465077A GB465077A GB722336A GB722336A GB465077A GB 465077 A GB465077 A GB 465077A GB 722336 A GB722336 A GB 722336A GB 722336 A GB722336 A GB 722336A GB 465077 A GB465077 A GB 465077A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- per cent
- electric discharge
- glasses
- relating
- 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
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
- Glass Compositions (AREA)
Abstract
465,077. Glass manufacture. GENERAL ELECTRIC CO., Ltd. (Patent - Treuhand- Ges. f³r Elektrische Gl³hlampen) March 10, 1936, No. 7223. [Class 56] A glass which resists attack by metal vapours is composed of 15-25 per cent of silica, 25- 35 per cent of alumina, and 20-35 per cent of boron trioxide, the remainder consisting of calcium oxide or barium oxide or both together. The glass is suitable for use in making the envelopes of electric discharge lamps containing the vapour of sodium, potassium, or magnesium. An envelope may be made entirely of the glass, or it may be made of any other suitable glass which is flashed on its inner surface with a coating of glass having the composition given above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB722336A GB465077A (en) | 1936-03-10 | 1936-03-10 | Improvements in or relating to glasses for electric discharge devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB722336A GB465077A (en) | 1936-03-10 | 1936-03-10 | Improvements in or relating to glasses for electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB465077A true GB465077A (en) | 1937-04-30 |
Family
ID=9828983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB722336A Expired GB465077A (en) | 1936-03-10 | 1936-03-10 | Improvements in or relating to glasses for electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB465077A (en) |
-
1936
- 1936-03-10 GB GB722336A patent/GB465077A/en not_active Expired
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