GB671992A - Improvements in or relating to electric discharge tubes - Google Patents

Improvements in or relating to electric discharge tubes

Info

Publication number
GB671992A
GB671992A GB24439/50A GB2443950A GB671992A GB 671992 A GB671992 A GB 671992A GB 24439/50 A GB24439/50 A GB 24439/50A GB 2443950 A GB2443950 A GB 2443950A GB 671992 A GB671992 A GB 671992A
Authority
GB
United Kingdom
Prior art keywords
relating
electric discharge
discharge tubes
oct
thorium
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
GB24439/50A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB671992A publication Critical patent/GB671992A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0019—Chemical composition and manufacture
    • H01J2893/002—Chemical composition and manufacture chemical

Landscapes

  • Discharge Lamp (AREA)

Abstract

671,992. Electrode materials. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 6, 1950 [Oct. 10, 1949], No. 24439/50. Class 39 (i). In a discharge tube having a cathode-activated by alkaline earth metal oxides, the grid or anode is coated with thorium to reduce electron emission.
GB24439/50A 1949-10-10 1950-10-06 Improvements in or relating to electric discharge tubes Expired GB671992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL671992X 1949-10-10

Publications (1)

Publication Number Publication Date
GB671992A true GB671992A (en) 1952-05-14

Family

ID=19802154

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24439/50A Expired GB671992A (en) 1949-10-10 1950-10-06 Improvements in or relating to electric discharge tubes

Country Status (1)

Country Link
GB (1) GB671992A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348092A (en) * 1965-01-04 1967-10-17 Gen Electric Electron discharge device having a barium dispensing anode structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348092A (en) * 1965-01-04 1967-10-17 Gen Electric Electron discharge device having a barium dispensing anode structure

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