GB475772A - Improvements in electric discharge tubes - Google Patents

Improvements in electric discharge tubes

Info

Publication number
GB475772A
GB475772A GB10417/37A GB1041737A GB475772A GB 475772 A GB475772 A GB 475772A GB 10417/37 A GB10417/37 A GB 10417/37A GB 1041737 A GB1041737 A GB 1041737A GB 475772 A GB475772 A GB 475772A
Authority
GB
United Kingdom
Prior art keywords
cathode
screen
april
alkaline
earth metal
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
GB10417/37A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB475772A publication Critical patent/GB475772A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/94—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering

Landscapes

  • Luminescent Compositions (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

475,772. Cathode-ray tubes. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. April 12, 1937, No. 10417. Convention date, April 14, 1936. [Class 39 (i)] In a cathode-ray tube having an oxide cathode 2 and a fluorescent screen 3, the fluorescent substance of which contains a sulphur compound, e.g. zinc sulphide or zinc cadmium sulphide, a gas - binding substance, such as an alkaline-earth metal, is provided between the cathode and the screen. In the construction shown, an annular area 4 of alkaline-earth metal is provided on the wall of the tube ; this serves to bind any sulphur vaporizing from the screen.
GB10417/37A 1936-04-14 1937-04-12 Improvements in electric discharge tubes Expired GB475772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL475772X 1936-04-14

Publications (1)

Publication Number Publication Date
GB475772A true GB475772A (en) 1937-11-25

Family

ID=19786517

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10417/37A Expired GB475772A (en) 1936-04-14 1937-04-12 Improvements in electric discharge tubes

Country Status (2)

Country Link
US (1) US2159946A (en)
GB (1) GB475772A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728009A (en) * 1950-11-14 1955-12-20 Rca Corp Cathode-ray tube with target support
US2843777A (en) * 1954-01-28 1958-07-15 Rauland Corp Cathode-ray tubes
US2858466A (en) * 1955-11-25 1958-10-28 Westinghouse Electric Corp Method of reducing secondary emission from bombarded surfaces
US4210844A (en) * 1978-11-20 1980-07-01 Gte Sylvania Incorporated Cathode ray tube arc suppressor coating
KR100286586B1 (en) * 1997-07-25 2001-05-02 κΉ€μˆœνƒ Getter flashing method of cathode ray tube and getter for cathode ray tube

Also Published As

Publication number Publication date
US2159946A (en) 1939-05-23

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