GB523923A - Improvements in electric discharge devices with quartz or like envelopes - Google Patents

Improvements in electric discharge devices with quartz or like envelopes

Info

Publication number
GB523923A
GB523923A GB163839A GB163839A GB523923A GB 523923 A GB523923 A GB 523923A GB 163839 A GB163839 A GB 163839A GB 163839 A GB163839 A GB 163839A GB 523923 A GB523923 A GB 523923A
Authority
GB
United Kingdom
Prior art keywords
sleeve
lead
quartz
envelope
auxiliary electrode
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
GB163839A
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 GB163839A priority Critical patent/GB523923A/en
Publication of GB523923A publication Critical patent/GB523923A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/32—Seals for leading-in conductors

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

523,923. Discharge lamps. GENERAL ELECTRIC CO., Ltd. (Patent - Treuhand - Ges. fur Elektrische Gluhlampen). Jan. 17, 1939, No. 1638. [Class 39 (i)] In high pressure metal vapour lamps having an envelope 2 of quartz, or other material having a thermal expansion co-efficient not greater than 1.5 x 10<SP>-6</SP> per ‹C., the main electrode 13 is surrounded by a sleeve 9 of quartz, and the lead to the auxiliary electrode 8 is on the outside of the sleeve. Preferably the auxiliary electrode is formed by turning the end of the lead over the edge of the sleeve. The main electrode consists of a coil of tungsten &c. on a core 12 of activating material, supported axially in the sleeve 9 and connected to the external lead 15 by an embedded strip 14. The lead 8 is connected to the external lead 17 by a strip 16, and the whole is sealed into the end 10 of the envelope. The envelope is supported in an outer bulb by leads passing through the foot tube and the auxiliary electrode is connected to one of the leads through a high resistance.
GB163839A 1939-01-17 1939-01-17 Improvements in electric discharge devices with quartz or like envelopes Expired GB523923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB163839A GB523923A (en) 1939-01-17 1939-01-17 Improvements in electric discharge devices with quartz or like envelopes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB163839A GB523923A (en) 1939-01-17 1939-01-17 Improvements in electric discharge devices with quartz or like envelopes

Publications (1)

Publication Number Publication Date
GB523923A true GB523923A (en) 1940-07-25

Family

ID=9725398

Family Applications (1)

Application Number Title Priority Date Filing Date
GB163839A Expired GB523923A (en) 1939-01-17 1939-01-17 Improvements in electric discharge devices with quartz or like envelopes

Country Status (1)

Country Link
GB (1) GB523923A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512835A (en) * 1948-04-01 1950-06-27 George M Schroeder Luminous tube apparatus
GB2122024A (en) * 1982-05-28 1984-01-04 Gen Electric Co Plc Lamp stems
US4539511A (en) * 1981-09-04 1985-09-03 Thorn Emi Plc High pressure discharge lamps with means for reducing rectification

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512835A (en) * 1948-04-01 1950-06-27 George M Schroeder Luminous tube apparatus
US4539511A (en) * 1981-09-04 1985-09-03 Thorn Emi Plc High pressure discharge lamps with means for reducing rectification
GB2122024A (en) * 1982-05-28 1984-01-04 Gen Electric Co Plc Lamp stems

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