GB444132A - Improvements in electric discharge devices - Google Patents

Improvements in electric discharge devices

Info

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
Application number
GB3644034A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to GB3644034A priority Critical patent/GB444132A/en
Publication of GB444132A publication Critical patent/GB444132A/en
Expired legal-status Critical Current

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

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.
GB3644034A 1934-12-19 1934-12-19 Improvements in electric discharge devices Expired GB444132A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005066091A2 (en) * 2003-12-30 2005-07-21 Corning Incorporated High strain point glasses

Cited By (3)

* Cited by examiner, † Cited by third party
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

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