GB1307034A - Discharge lamp electrodes - Google Patents

Discharge lamp electrodes

Info

Publication number
GB1307034A
GB1307034A GB1226671A GB1226671A GB1307034A GB 1307034 A GB1307034 A GB 1307034A GB 1226671 A GB1226671 A GB 1226671A GB 1226671 A GB1226671 A GB 1226671A GB 1307034 A GB1307034 A GB 1307034A
Authority
GB
United Kingdom
Prior art keywords
tungsten
disc
titanium
discharge lamp
april
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
GB1226671A
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.)
Compagnie des Lampes
Original Assignee
Compagnie des Lampes
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
Priority claimed from FR7018756A external-priority patent/FR2087545A5/fr
Priority claimed from FR7112325A external-priority patent/FR2133088A6/en
Application filed by Compagnie des Lampes filed Critical Compagnie des Lampes
Publication of GB1307034A publication Critical patent/GB1307034A/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
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0735—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode
    • H01J61/0737—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material

Landscapes

  • Discharge Lamp (AREA)

Abstract

1307034 Discharge apparatus COMPAGNIE DES LAMPES AS 29 April 1971 [22 May 1970 7 April 1971] 12266/71 Heading H1D An electrode for a discharge lamp, comprises a tungsten rod 1 having secured at one end a coil 2 of tungsten wire, and a thorium-emitting disc 7 above the said end of the rod. A second disc 8 can contain a getter material such as titanium or any metal in the same group. The discs 7, 8 are held closely together by further coils 4, 5, 6 and welds 9, 10. A typical disc 7 is made by mixing 45 mg of tungsten, 5mg. thorium oxide and 0À5 mg. of silicon, the mixture being compressed at about 15 to 20tons/sq.cm., and subsequently heated in argon at about 1500‹ C. A titanium-containing disc is similarly made with 10-50% titanium mixed with tungsten.
GB1226671A 1970-05-22 1971-04-29 Discharge lamp electrodes Expired GB1307034A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7018756A FR2087545A5 (en) 1970-05-22 1970-05-22
FR7112325A FR2133088A6 (en) 1971-04-07 1971-04-07 Thorium emitter electrode - for discharge lamps wherein thorium pellets are heated to 2000 C in mfr

Publications (1)

Publication Number Publication Date
GB1307034A true GB1307034A (en) 1973-02-14

Family

ID=26215753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1226671A Expired GB1307034A (en) 1970-05-22 1971-04-29 Discharge lamp electrodes

Country Status (4)

Country Link
US (1) US3753028A (en)
DE (1) DE2125375C3 (en)
ES (1) ES197179Y (en)
GB (1) GB1307034A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849690A (en) * 1973-11-05 1974-11-19 Gte Sylvania Inc Flash tube having improved cathode
US8277274B2 (en) * 2002-11-07 2012-10-02 Advanced Lighting Technologies, Inc. Apparatus and methods for use of refractory abhesives in protection of metallic foils and leads
JP5397106B2 (en) * 2009-09-09 2014-01-22 岩崎電気株式会社 Electrode, manufacturing method thereof, and high-pressure discharge lamp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB445575A (en) * 1934-10-12 1936-04-14 Gen Electric Co Ltd Improvements in or relating to electric discharge devices
US3195005A (en) * 1959-12-22 1965-07-13 Westinghouse Electric Corp Electrode and component therefor
US3132409A (en) * 1959-12-22 1964-05-12 Westinghouse Electric Corp Process for assembling electrodes
US3170081A (en) * 1962-06-05 1965-02-16 Westinghouse Electric Corp Discharge lamp electrode
NL6411355A (en) * 1964-09-30 1966-03-31

Also Published As

Publication number Publication date
DE2125375A1 (en) 1971-12-02
DE2125375B2 (en) 1979-08-09
ES197179U (en) 1975-04-01
US3753028A (en) 1973-08-14
DE2125375C3 (en) 1980-05-14
ES197179Y (en) 1975-09-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee