GB698452A - Improvements in electrical discharge lamps - Google Patents

Improvements in electrical discharge lamps

Info

Publication number
GB698452A
GB698452A GB731/52A GB73152A GB698452A GB 698452 A GB698452 A GB 698452A GB 731/52 A GB731/52 A GB 731/52A GB 73152 A GB73152 A GB 73152A GB 698452 A GB698452 A GB 698452A
Authority
GB
United Kingdom
Prior art keywords
electrode
tungsten
main
auxiliary electrodes
discharge
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
GB731/52A
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.)
Hanovia Chemical and Manufacturing Co
Original Assignee
Hanovia Chemical and Manufacturing Co
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 Hanovia Chemical and Manufacturing Co filed Critical Hanovia Chemical and Manufacturing Co
Publication of GB698452A publication Critical patent/GB698452A/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
    • 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

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

698,452. Discharge lamps. HANOVIA CHEMICAL & MANUFACTURING CO. Jan. 9, 1952 [Jan. 11, 1951], No. 731/51 Class 39(i) A compact-source lamp has a spherical envelope 1 having a pair of oppositely disposed side tubes 2, each containing an electrode 4 in the form of a tungsten rod having a length of at least three times the inside radius of the spherical envelope, and a major portion of each rod being encased in its respective side tube; each electrode 4 has mounted on it a first and second auxiliary electrode 7 and 9. The vacuum-tight seal is formed at 6. The discharge is initiated by the first auxiliary electrodes 7, which are small wire coils, possibly of tungsten but preferably molybdenum or tantalum. The second auxiliary electrodes 9, which are heavier tungsten coils than 7, take over and sustain the discharge until the relatively massive main electrodes 4 have heated up sufficiently. The whole starting procedure occurs in a fraction of a second. The main electrode spacing may be from a few mm. to about 2 cm., and dimensions of the main and auxiliary electrodes are given. The lamp has a rare gas filling, possibly with mercury vapour also, at a total pressure of at least one atmosphere.
GB731/52A 1951-01-11 1952-01-09 Improvements in electrical discharge lamps Expired GB698452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US205549A US2682007A (en) 1951-01-11 1951-01-11 Compact type electrical discharge device

Publications (1)

Publication Number Publication Date
GB698452A true GB698452A (en) 1953-10-14

Family

ID=22762657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB731/52A Expired GB698452A (en) 1951-01-11 1952-01-09 Improvements in electrical discharge lamps

Country Status (2)

Country Link
US (1) US2682007A (en)
GB (1) GB698452A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886737A (en) * 1949-11-11 1959-05-12 Fruengel Frank Quick-responsive spark gap device
BE541432A (en) * 1954-09-22
BE605847A (en) * 1960-07-08 1961-11-03 Frank Fruengel Constant emission flash lamp for optical measurements and special device for its power supply
US3621322A (en) * 1968-09-12 1971-11-16 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High-pressure compact arc lamp with electrodes containing tantalum carbide
DE3641045A1 (en) * 1986-12-01 1988-06-09 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh HIGH PRESSURE DISCHARGE LAMP, SEMI-SIDED
JPH0353481A (en) * 1989-07-19 1991-03-07 Yazaki Corp Discharge lamp
JP4736143B2 (en) * 2008-04-30 2011-07-27 岩崎電気株式会社 Ultra high pressure mercury lamp electrode and ultra high pressure mercury lamp

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE694486C (en) * 1936-08-04 1940-08-02 Quarzlampen Gmbh High pressure electric metal vapor discharge tubes
US2249672A (en) * 1936-12-10 1941-07-15 Gen Electric Discharge device
GB491176A (en) * 1937-05-20 1938-08-29 Gen Electric Co Ltd Improvements in high-pressure metal-vapour electric discharge devices
GB504120A (en) * 1937-10-18 1939-04-18 Gen Electric Co Ltd Improvements in electrodes for high-pressure mercury-vapour discharge devices
NL65805C (en) * 1938-06-24
BE440887A (en) * 1938-09-10
GB526064A (en) * 1939-03-07 1940-09-10 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Improvements in electrodes for electric discharge devices
US2241362A (en) * 1940-03-01 1941-05-06 Westinghouse Electric & Mfg Co Electron emissive cathode
GB573141A (en) * 1940-11-12 1945-11-08 Siemens Electric Lamps & Suppl Improvements relating to electric discharge lamps
GB579748A (en) * 1943-07-02 1946-08-14 Gen Electric Co Ltd Improvements in hpmv lamps
GB639536A (en) * 1946-04-17 1950-06-28 Gen Electric Co Ltd Improvements in and relating to mercury vapour lamps

Also Published As

Publication number Publication date
US2682007A (en) 1954-06-22

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