GB482807A - Improvements in thermionic electrodes for electric discharge lamps - Google Patents

Improvements in thermionic electrodes for electric discharge lamps

Info

Publication number
GB482807A
GB482807A GB29855/37A GB2985537A GB482807A GB 482807 A GB482807 A GB 482807A GB 29855/37 A GB29855/37 A GB 29855/37A GB 2985537 A GB2985537 A GB 2985537A GB 482807 A GB482807 A GB 482807A
Authority
GB
United Kingdom
Prior art keywords
discharge lamps
nov
disc
electric discharge
electrodes
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
GB29855/37A
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.)
British Thomson Houston Co Ltd
General Electric Co PLC
Original Assignee
British Thomson Houston Co Ltd
General Electric Co PLC
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 British Thomson Houston Co Ltd, General Electric Co PLC filed Critical British Thomson Houston Co Ltd
Publication of GB482807A publication Critical patent/GB482807A/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
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

482,807. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd., and GENERAL ELECTRIC CO., Ltd. Nov. 1, 1937, No. 29855. Convention date, Nov. 7, 1936. [Class 39 (i)] In electrodes for discharge lamps of the type comprising thermionically active material supported on a base member, the latter consists of a disc a of tungsten or nickel to which a spirally wound strip c preferably-of the same metal, is welded by its edge. The disc a may be flat as shown, or conical with the convex or concave face towards the discharge, and the thermionic material is packed between the convolutions of the spiral to a depth preferably leaving the upper edges of the strip proud. Spec'ification 450,971 is referred to.
GB29855/37A 1936-11-07 1937-11-01 Improvements in thermionic electrodes for electric discharge lamps Expired GB482807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE482807X 1936-11-07

Publications (1)

Publication Number Publication Date
GB482807A true GB482807A (en) 1938-04-05

Family

ID=6542883

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29855/37A Expired GB482807A (en) 1936-11-07 1937-11-01 Improvements in thermionic electrodes for electric discharge lamps

Country Status (1)

Country Link
GB (1) GB482807A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542348A (en) * 1949-09-16 1951-02-20 Gen Electric Electrode structure
EP0473164A2 (en) * 1990-08-30 1992-03-04 Toshiba Lighting & Technology Corporation Low pressure mercury vapor discharge lamp having cold cathode

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542348A (en) * 1949-09-16 1951-02-20 Gen Electric Electrode structure
EP0473164A2 (en) * 1990-08-30 1992-03-04 Toshiba Lighting & Technology Corporation Low pressure mercury vapor discharge lamp having cold cathode
EP0473164A3 (en) * 1990-08-30 1992-04-22 Toshiba Lighting & Technology Corporation Low pressure mercury vapor discharge lamp having cold cathode
US5256935A (en) * 1990-08-30 1993-10-26 Toshiba Lighting & Technology Corporation Low pressure mercury vapor discharge lamp having cold cathode

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