GB741020A - Improvements in or relating to thermionic and secondary emission cathodes - Google Patents

Improvements in or relating to thermionic and secondary emission cathodes

Info

Publication number
GB741020A
GB741020A GB2203753A GB2203753A GB741020A GB 741020 A GB741020 A GB 741020A GB 2203753 A GB2203753 A GB 2203753A GB 2203753 A GB2203753 A GB 2203753A GB 741020 A GB741020 A GB 741020A
Authority
GB
United Kingdom
Prior art keywords
cathode
nickel
thermionic
relating
roughened surface
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
GB2203753A
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.)
DONALD ARTHUR WRIGHT
KENNETH HERBERT WILKINSON
General Electric Co PLC
Original Assignee
DONALD ARTHUR WRIGHT
KENNETH HERBERT WILKINSON
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 DONALD ARTHUR WRIGHT, KENNETH HERBERT WILKINSON, General Electric Co PLC filed Critical DONALD ARTHUR WRIGHT
Priority to GB2203753A priority Critical patent/GB741020A/en
Priority to FR66813D priority patent/FR66813E/en
Publication of GB741020A publication Critical patent/GB741020A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/32—Secondary-electron-emitting electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/14—Solid thermionic cathodes characterised by the material

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

741,020. Cathode materials and processing. GENERAL ELECTRIC CO., Ltd., BAKER, B. O., WILKINSON, K. H., and WRIGHT, D. A. July 22, 1954 [Aug. 10, 1953], No. 22037/53. Class 39 (1). In the thermionic or secondary-emitting cathode of Specification 706,708, in which a roughened surface is coated with successive layers of the emissive material and pressed smooth, the roughened surface is formed by a sintered metallic particle coating. One method is to spray the cathode with a suspension of nickel oxide in a nitrocellulose binder to a thickness of about 0.05 mm., and then heat in a reducing atmosphere at 1100‹ C. to reduce the oxide to nickel, and sinter the particles. Alternatively, nickel or tungsten particles can be applied directly and sintered. The cathode may be used in a cathode-ray tube.
GB2203753A 1953-08-10 1953-08-10 Improvements in or relating to thermionic and secondary emission cathodes Expired GB741020A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2203753A GB741020A (en) 1953-08-10 1953-08-10 Improvements in or relating to thermionic and secondary emission cathodes
FR66813D FR66813E (en) 1953-08-10 1954-08-05 Thermionic or secondary emission cathodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2203753A GB741020A (en) 1953-08-10 1953-08-10 Improvements in or relating to thermionic and secondary emission cathodes

Publications (1)

Publication Number Publication Date
GB741020A true GB741020A (en) 1955-11-23

Family

ID=10172879

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2203753A Expired GB741020A (en) 1953-08-10 1953-08-10 Improvements in or relating to thermionic and secondary emission cathodes

Country Status (2)

Country Link
FR (1) FR66813E (en)
GB (1) GB741020A (en)

Also Published As

Publication number Publication date
FR66813E (en) 1957-09-10

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