GB740267A - Improvements in or relating to gaseous electric discharge devices - Google Patents

Improvements in or relating to gaseous electric discharge devices

Info

Publication number
GB740267A
GB740267A GB9964/53A GB996453A GB740267A GB 740267 A GB740267 A GB 740267A GB 9964/53 A GB9964/53 A GB 9964/53A GB 996453 A GB996453 A GB 996453A GB 740267 A GB740267 A GB 740267A
Authority
GB
United Kingdom
Prior art keywords
relating
electric discharge
discharge devices
life
dioxide
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
GB9964/53A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International 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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB740267A publication Critical patent/GB740267A/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
    • H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
    • H01J61/0677—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material

Landscapes

  • Discharge Lamp (AREA)

Abstract

740,267. Cathode materials. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. April 13, 1953 [May 31, 1952], No. 9964/53. Drawings to Specification. Class 39 (1). The filamentary electrode of a discharge device, especially a fluorescent lamp, has a coating of alkaline earth metal oxide(s), including also a quantity of hafnium dioxide between about 0.1 per cent and 1.37 per cent by weight. Zirconium dioxide may also be present. The effect is to increase the life and reduce discolouration of the lamp. Experimental data is given showing the results of life and discolouration tests with various proportions of hafnium dioxide and zirconium dioxide.
GB9964/53A 1952-05-31 1953-04-13 Improvements in or relating to gaseous electric discharge devices Expired GB740267A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US740267XA 1952-05-31 1952-05-31

Publications (1)

Publication Number Publication Date
GB740267A true GB740267A (en) 1955-11-09

Family

ID=22117240

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9964/53A Expired GB740267A (en) 1952-05-31 1953-04-13 Improvements in or relating to gaseous electric discharge devices

Country Status (2)

Country Link
BE (1) BE520259A (en)
GB (1) GB740267A (en)

Also Published As

Publication number Publication date
BE520259A (en)

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