GB987483A - A cathode for a high-pressure discharge lamp - Google Patents

A cathode for a high-pressure discharge lamp

Info

Publication number
GB987483A
GB987483A GB42410/62A GB4241062A GB987483A GB 987483 A GB987483 A GB 987483A GB 42410/62 A GB42410/62 A GB 42410/62A GB 4241062 A GB4241062 A GB 4241062A GB 987483 A GB987483 A GB 987483A
Authority
GB
United Kingdom
Prior art keywords
cathode
tungsten
discharge lamp
nov
cone
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
GB42410/62A
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 GB987483A publication Critical patent/GB987483A/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

987,483. Discharge lamps. PATENTTREUHAND GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN. Nov. 9, 1962 [Nov. 27, 1961], No. 42410/62. Heading H1D. The cathode of a high-pressure, e.g. rare gas, discharge lamp consists of activated tungsten and has (a) a cylindrical portion 4 at its mounting end, (b) a cone-shaped, e.g. < 50 degrees, portion 5 at its discharge end, (c) a rounded apex to its conical discharge end with a radius of more than 0.2 mm. and (d) an annular groove in the cone-shaped portion. During operation, the cathode over less than half its length is at least 2000‹ C. The tungsten may contain less than 6 w/o., e.g. 3 w/o., thorium oxide, and may be hammered. The tungsten anode 2 has circumferential annular grooves.
GB42410/62A 1961-11-27 1962-11-09 A cathode for a high-pressure discharge lamp Expired GB987483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP28309A DE1151877B (en) 1961-11-27 1961-11-27 Cathode for a high pressure discharge lamp, preferably a noble gas high pressure lamp

Publications (1)

Publication Number Publication Date
GB987483A true GB987483A (en) 1965-03-31

Family

ID=7371203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42410/62A Expired GB987483A (en) 1961-11-27 1962-11-09 A cathode for a high-pressure discharge lamp

Country Status (3)

Country Link
US (1) US3248586A (en)
DE (1) DE1151877B (en)
GB (1) GB987483A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364374A (en) * 1964-09-28 1968-01-16 Gen Electric Compact source lamp having electrode construction providing arc stabilization
US3509419A (en) * 1967-08-31 1970-04-28 Nasa Dust particle injector for hypervelocity accelerators
NL7203663A (en) * 1972-03-18 1973-09-20
KR900008794B1 (en) * 1986-06-11 1990-11-29 티 디 케이 가부시끼가이샤 Discharge lamp unit
US5168194A (en) * 1986-12-02 1992-12-01 Heraeus Noblelight Limited Pulse simmer flash lamp cathode
GB9007327D0 (en) * 1990-03-31 1990-05-30 Smiths Industries Plc Gas discharge electrodes
US5107165A (en) * 1990-11-01 1992-04-21 General Electric Company Initial light output for metal halide lamp
US5083059A (en) * 1990-12-31 1992-01-21 Welch Allyn, Inc. Electrode for metal halide discharge lamp
JPH07114902A (en) * 1993-10-19 1995-05-02 Hamamatsu Photonics Kk Metal halide lamp
DE19749908A1 (en) 1997-11-11 1999-05-12 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electrode component for discharge lamps
JP2000306546A (en) * 1999-04-21 2000-11-02 Ushio Inc Short arc discharge lamp
US7176632B2 (en) * 2005-03-15 2007-02-13 Osram Sylvania Inc. Slotted electrode for high intensity discharge lamp
JP5009062B2 (en) * 2007-06-22 2012-08-22 株式会社オーク製作所 Electrode structure for discharge lamp
KR102436519B1 (en) * 2015-08-18 2022-08-25 삼성전자주식회사 Arc lamp and substrate heating apparatus having the arc lamp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1267199A (en) * 1915-09-20 1918-05-21 Gen Electric Incandescent-cathode arc device.
GB639536A (en) * 1946-04-17 1950-06-28 Gen Electric Co Ltd Improvements in and relating to mercury vapour lamps
US2716713A (en) * 1950-03-22 1955-08-30 Gen Electric Cold electrode pulse lamp structure
US2974249A (en) * 1958-01-28 1961-03-07 Duro Test Corp Xenon short arc lamps
NL272789A (en) * 1960-12-27

Also Published As

Publication number Publication date
DE1151877B (en) 1963-07-25
US3248586A (en) 1966-04-26

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