GB1438524A - Electrode for a gas and/or vapour discharge lamp and method of forming the electrode - Google Patents

Electrode for a gas and/or vapour discharge lamp and method of forming the electrode

Info

Publication number
GB1438524A
GB1438524A GB3931873A GB3931873A GB1438524A GB 1438524 A GB1438524 A GB 1438524A GB 3931873 A GB3931873 A GB 3931873A GB 3931873 A GB3931873 A GB 3931873A GB 1438524 A GB1438524 A GB 1438524A
Authority
GB
United Kingdom
Prior art keywords
electrode
zone
discharge lamp
sintered
gas
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
GB3931873A
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
Publication of GB1438524A publication Critical patent/GB1438524A/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
    • H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode

Landscapes

  • Discharge Lamp (AREA)

Abstract

1438524 Cathode constructions PATENTTREUHAND - GES FUR ELEKTRISCHE GLUHLAMPEN mbH 20 Aug 1973 [18 Sept 1972] 39318/73 Heading H1D A h.p. discharge lamp electrode comprises a rod 1 partly enclosed by 2 contiguous porous sintered zones 7, 5; the zone 7 partially enveloping the other zone 5 which contains emissive material. Zone 4 is formed from compressed powdered W, ZrC or LaB 4 mixed with Zn, Cu or Au and sintered up to 2600‹ C., thereby removing the Zn, Cu or Au. A mixture of 50% W, ZrC or LaB 4 and 50% of the oxides of Ba, Ca and Th or Ba cirate is added and the assembly sintered up to 2000‹ C.
GB3931873A 1972-09-18 1973-08-20 Electrode for a gas and/or vapour discharge lamp and method of forming the electrode Expired GB1438524A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2245717A DE2245717A1 (en) 1972-09-18 1972-09-18 ELECTRODE WITH A POROUS SINTER BODY

Publications (1)

Publication Number Publication Date
GB1438524A true GB1438524A (en) 1976-06-09

Family

ID=5856641

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3931873A Expired GB1438524A (en) 1972-09-18 1973-08-20 Electrode for a gas and/or vapour discharge lamp and method of forming the electrode

Country Status (5)

Country Link
US (1) US3911309A (en)
JP (1) JPS4970478A (en)
DE (1) DE2245717A1 (en)
FR (1) FR2200618B1 (en)
GB (1) GB1438524A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112012000696B4 (en) * 2011-03-10 2014-12-04 Ushio Denki Kabushiki Kaisha Short arc discharge lamp with cathode consisting of main part and emitter part with different porosities or crystal sizes

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4097762A (en) * 1975-08-14 1978-06-27 International Telephone & Telegraph Corporation Xenon arc discharge lamp having a particular electrode composition and wherein the arc discharge is obtained without heating the electrode
GB2010911B (en) * 1977-12-06 1982-03-31 Philips Nv Method of making cathode support nickle strip
DE2822665A1 (en) * 1978-05-05 1979-11-08 Bbc Brown Boveri & Cie GLOW CATHODE MATERIAL
GB1446507A (en) * 1978-09-15 1976-08-18 V N I Pk I T I Elektrosvarochn Electrode for plasma arc working of conductive materials
GB2079036A (en) * 1980-06-20 1982-01-13 Gen Electric Electron emitting coating in metal halide arc lamp
FR2494035A1 (en) * 1980-11-07 1982-05-14 Thomson Csf THERMO-ELECTRONIC CATHODE FOR MICROFREQUENCY TUBE AND TUBE INCORPORATING SUCH A CATHODE
US4415835A (en) * 1981-06-22 1983-11-15 General Electric Company Electron emissive coatings for electric discharge devices
US4487589A (en) * 1981-06-22 1984-12-11 General Electric Company Method of preparing electron emissive coatings for electric discharge devices
KR900008794B1 (en) * 1986-06-11 1990-11-29 티 디 케이 가부시끼가이샤 Discharge lamp unit
KR920001844B1 (en) * 1986-07-15 1992-03-05 티디 케이 가부시기가이샤 Cold cathode type discharge lamp apparatus
GB9413973D0 (en) * 1994-07-11 1994-08-31 Rank Brimar Ltd Electrode structure
DE4442161C1 (en) * 1994-11-27 1996-03-07 Bayerische Metallwerke Gmbh Method for producing a shaped component for e.g. welding electrodes
JPH09231946A (en) * 1996-02-23 1997-09-05 Ushio Inc Short arc electric discharge lamp
EP0835519B1 (en) * 1996-03-22 2002-06-12 Koninklijke Philips Electronics N.V. High pressure metal halide lamp
DE19749908A1 (en) 1997-11-11 1999-05-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electrode component for discharge lamps
JP2007095665A (en) * 2005-09-02 2007-04-12 Sony Corp Short-arc type high-pressure discharge electrode, short-arc type high-pressure discharge tube, short-arc type high-pressure discharge light source device and their manufacturing methods
DE102006023970A1 (en) * 2006-05-22 2007-11-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Electrode for a discharge lamp and a method for producing such an electrode
WO2008074361A1 (en) * 2006-12-18 2008-06-26 Osram Gesellschaft mit beschränkter Haftung Electrode for a discharge lamp
CN102366837A (en) * 2011-08-10 2012-03-07 厦门虹鹭钨钼工业有限公司 Method for manufacturing thorium tungsten-tungsten composite electrode used for high pressure gas discharge lamp
AT16085U1 (en) * 2017-09-22 2019-01-15 Plansee Se cathode

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492142A (en) * 1945-10-17 1949-12-27 Kenneth J Germeshausen Electric system embodying coldcathode gaseous discharge device
US3010046A (en) * 1952-02-26 1961-11-21 Westinghouse Electric Corp Cathode structure
NL96853C (en) * 1953-09-24
US3076915A (en) * 1954-12-24 1963-02-05 Egyesuelt Izzolampa Cathode assembly and method of making same
US2975322A (en) * 1958-12-29 1961-03-14 Raytheon Co Indirectly heated cathodes
NL272981A (en) * 1961-01-02
US3243637A (en) * 1962-10-31 1966-03-29 Gen Electric Dispenser cathode
DE1533395A1 (en) * 1966-03-11 1969-12-18 Tokvo Shibaura Electric Co Ltd Tungsten materials with improved flexibility, method of processing them and components made from these materials
US3558966A (en) * 1967-03-01 1971-01-26 Semicon Associates Inc Directly heated dispenser cathode
US3656020A (en) * 1970-11-18 1972-04-11 Spectra Mat Inc Thermionic cathode comprising mixture of barium oxide, calcium oxide and lithium oxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112012000696B4 (en) * 2011-03-10 2014-12-04 Ushio Denki Kabushiki Kaisha Short arc discharge lamp with cathode consisting of main part and emitter part with different porosities or crystal sizes

Also Published As

Publication number Publication date
US3911309A (en) 1975-10-07
JPS4970478A (en) 1974-07-08
FR2200618A1 (en) 1974-04-19
DE2245717A1 (en) 1974-03-28
FR2200618B1 (en) 1977-02-25

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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