GB444132A - Improvements in electric discharge devices - Google Patents
Improvements in electric discharge devicesInfo
- Publication number
- GB444132A GB444132A GB3644034A GB3644034A GB444132A GB 444132 A GB444132 A GB 444132A GB 3644034 A GB3644034 A GB 3644034A GB 3644034 A GB3644034 A GB 3644034A GB 444132 A GB444132 A GB 444132A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- sio2
- glass
- al2o3
- na2o
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/302—Vessels; Containers characterised by the material of the vessel
-
- 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
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
-
- 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
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/097—Glass compositions containing silica with 40% to 90% silica, by weight containing phosphorus, niobium or tantalum
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)
- Ceramic Engineering (AREA)
- Glass Compositions (AREA)
Abstract
444,132. Glass manufacture. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Patent - Treuhand - Ges. f³r Elektrische Gl³hlampen ; 11, Ehrenbergstrasse, Berlin) Dec. 19, 1934, No. 36440. [Class 56] [See also Group XL] A metal vapour filled electric discharge tube adapted to emit ultra-violet light is composed of glass highly transparent to the light and flashed on the inside with a thin layer of glass less transparent but more resistant to the discharge and in particular with a higher softening temperature than the outer glass. The main envelope may have the following compositions : 74 per cent of SiO2, 15 per cent of B2O3' 7 per cent of Na2O, 4 per cent of Al2O3' or 75À5 per cent of SiO2, 13À5 per cent of B2O3, 9 per cent of Na2O and 2 per cent of Al2O3, whilst the flashed-on layer may consist of 58 per cent of SiO2, 1 per cent of B2O3, 28 per cent of Al2O3' 8 per cent of MgO, 5 per cent of CaO, or of 50 per cent of SiO2, 1 per cent of B2O3, 25 per cent of Al2Oa, 8 per cent of MgO, 6 per cent of CaO, 5 per cent of BaO and 5 per cent of P2O5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3644034A GB444132A (en) | 1934-12-19 | 1934-12-19 | Improvements in electric discharge devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3644034A GB444132A (en) | 1934-12-19 | 1934-12-19 | Improvements in electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB444132A true GB444132A (en) | 1936-03-16 |
Family
ID=10388168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3644034A Expired GB444132A (en) | 1934-12-19 | 1934-12-19 | Improvements in electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB444132A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005066091A2 (en) * | 2003-12-30 | 2005-07-21 | Corning Incorporated | High strain point glasses |
-
1934
- 1934-12-19 GB GB3644034A patent/GB444132A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005066091A2 (en) * | 2003-12-30 | 2005-07-21 | Corning Incorporated | High strain point glasses |
| WO2005066091A3 (en) * | 2003-12-30 | 2006-02-02 | Corning Inc | High strain point glasses |
| US7323426B2 (en) | 2003-12-30 | 2008-01-29 | Corning Incorporated | High strain point glasses |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR940014219A (en) | Fluorescent lamps having a glass composition for electric light, a stem made from the glass composition, and a lamp envelope of the glass composition | |
| ES342743A1 (en) | Glass for cathode-ray tubes for television display | |
| GB368209A (en) | Improvements in luminous electric discharge tubes | |
| GB462889A (en) | Improvements in or relating to high-pressure electric discharge tubes | |
| GB431923A (en) | Improvements in or relating to artificially cooled mercury vapour discharge tubes | |
| GB388716A (en) | Improvements in and relating to the manufacture of glass articles | |
| GB444132A (en) | Improvements in electric discharge devices | |
| GB1241650A (en) | Fluorescent lamps | |
| GB414620A (en) | Improvements in luminous electric discharge tubes | |
| GB425007A (en) | Improved glasses for the stems and flares of electric lamps | |
| GB589202A (en) | Improved glass composition | |
| GB402747A (en) | Improvements in or relating to electric gas and vapor arc discharge lamps | |
| GB426129A (en) | Improvements in or relating to refractory glasses | |
| GB351245A (en) | Improvements in luminous electric discharge tubes | |
| GB431651A (en) | Improvements in or relating to electric discharge devices | |
| GB372154A (en) | Improvements in luminous electric discharge tubes | |
| GB455101A (en) | Improvements in the manufacture of electric discharge devices | |
| GB458603A (en) | Improvements in luminous electric discharge lamps | |
| GB411029A (en) | Improvements in glass envelopes containing alkali metal-vapour | |
| NL68136C (en) | ||
| GB531823A (en) | Improvements in and relating to the sealing of molybdenum members into glass | |
| GB619148A (en) | Improvements in or relating to electric discharge tubes and incandescent lamps | |
| GB451308A (en) | Improvements in or relating to glasses for telegraph insulators and the like | |
| GB483772A (en) | Improvements in electric discharge devices whose filling comprises alkali metal vapour | |
| GB458881A (en) | Improvements in or relating to refractory glasses |