JPS5673834A - Indirectly heated cathode - Google Patents

Indirectly heated cathode

Info

Publication number
JPS5673834A
JPS5673834A JP15107279A JP15107279A JPS5673834A JP S5673834 A JPS5673834 A JP S5673834A JP 15107279 A JP15107279 A JP 15107279A JP 15107279 A JP15107279 A JP 15107279A JP S5673834 A JPS5673834 A JP S5673834A
Authority
JP
Japan
Prior art keywords
cathode
sleeve
nickel
hatlike
indirectly heated
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.)
Pending
Application number
JP15107279A
Other languages
Japanese (ja)
Inventor
Kenichi Konishi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP15107279A priority Critical patent/JPS5673834A/en
Publication of JPS5673834A publication Critical patent/JPS5673834A/en
Pending 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
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/26—Supports for the emissive material

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To shorten the warming up time of an indirectly heated cathode by subjecting only the inner surface of a cathode sleeve to a blackening treatment. CONSTITUTION:A clad structured cathode sleeve 3 which has a nickel chromium alloy made inner layer 1 and a nickel made outer layer 2 constitutes a cathode with a nickel made hatlike unit 4 which is attached so as to cover one opening of the sleeve 3 by welding or the like, adequate numbers of a ribbon 5 for support the cathode and an electron radioactive oxide layer 6 together. The cathode sleeve 3 is subjected to a high temperature heating treatment in a wet hydrogen gas atmosphere as a simple or in condition of attaching the hatlike unit 4 and ribbons 5. Thereby, the inner surface of the sleeve only is blackened by the oxidation, and its outer surface maintains the nickel metallic luster, as it is not oxidized.
JP15107279A 1979-11-20 1979-11-20 Indirectly heated cathode Pending JPS5673834A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15107279A JPS5673834A (en) 1979-11-20 1979-11-20 Indirectly heated cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15107279A JPS5673834A (en) 1979-11-20 1979-11-20 Indirectly heated cathode

Publications (1)

Publication Number Publication Date
JPS5673834A true JPS5673834A (en) 1981-06-18

Family

ID=15510685

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15107279A Pending JPS5673834A (en) 1979-11-20 1979-11-20 Indirectly heated cathode

Country Status (1)

Country Link
JP (1) JPS5673834A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644569A2 (en) * 1993-09-20 1995-03-22 Goldstar Co. Ltd. An indirectly heated cathode sleeve and manufacturing method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0644569A2 (en) * 1993-09-20 1995-03-22 Goldstar Co. Ltd. An indirectly heated cathode sleeve and manufacturing method thereof
EP0644569A3 (en) * 1993-09-20 1995-06-21 Gold Star Co An indirectly heated cathode sleeve and manufacturing method thereof.
US5569391A (en) * 1993-09-20 1996-10-29 Goldstar Co., Ltd. Indirect cathode sleeve manufacturing method
US5900692A (en) * 1993-09-20 1999-05-04 Goldstar Co., Ltd. Indirect cathode sleeve
CN1087483C (en) * 1993-09-20 2002-07-10 株式会社金星社 An indirect cathode sleeve and manufacturing method thereof

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