JPS57115739A - Impregnation-type cathode - Google Patents

Impregnation-type cathode

Info

Publication number
JPS57115739A
JPS57115739A JP205481A JP205481A JPS57115739A JP S57115739 A JPS57115739 A JP S57115739A JP 205481 A JP205481 A JP 205481A JP 205481 A JP205481 A JP 205481A JP S57115739 A JPS57115739 A JP S57115739A
Authority
JP
Japan
Prior art keywords
network
high
member
ni
density emitter
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
JP205481A
Inventor
Toshimitsu Kinoshita
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP205481A priority Critical patent/JPS57115739A/en
Publication of JPS57115739A publication Critical patent/JPS57115739A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00Details 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
    • H01J1/02Main electrodes
    • H01J1/13Solid thermionic cathodes
    • H01J1/20Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28Dispenser-type cathodes, e.g. L-cathode

Abstract

PURPOSE:To realize a high voltage-resisting characteristic, and obtain an increased initial and saturated emission by packing a high-density emitter member into the meshes of a network affixed on the main surface of a base metal, and coating both the network and the high-density emitter member with a low-density emitter member. CONSTITUTION:A concave base metal 22, which is made of Ni and forms a part of a spherical surface, is fixed to one end of a cathode sleeve 21 enclosing a heater. A network 23 made of Ni is affixed to the concave surface of the base metal 22 by welding or the like. The meshes of the network 23 are packed with a high-density emitter member 24 made of a mixture powder of Ni and a carbonate. Then, the network 23 and the member 24 are coated with a low- density emitter layer 25, which consists of only a carbonate and has a thickness of around 15-20mum. Owing to the above constitution, an increased initial and saturated emission can be obtained, and a high voltage-resisting characteristic can be realized.
JP205481A 1981-01-12 1981-01-12 Impregnation-type cathode Pending JPS57115739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP205481A JPS57115739A (en) 1981-01-12 1981-01-12 Impregnation-type cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP205481A JPS57115739A (en) 1981-01-12 1981-01-12 Impregnation-type cathode

Publications (1)

Publication Number Publication Date
JPS57115739A true JPS57115739A (en) 1982-07-19

Family

ID=11518616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP205481A Pending JPS57115739A (en) 1981-01-12 1981-01-12 Impregnation-type cathode

Country Status (1)

Country Link
JP (1) JPS57115739A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130395A1 (en) * 1983-06-29 1985-01-09 Siemens Aktiengesellschaft Fast warm-up cathode
FR2833406A1 (en) * 2001-12-10 2003-06-13 Thomson Licensing Sa Vacuum tube cathode with improved lifetime

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130395A1 (en) * 1983-06-29 1985-01-09 Siemens Aktiengesellschaft Fast warm-up cathode
FR2833406A1 (en) * 2001-12-10 2003-06-13 Thomson Licensing Sa Vacuum tube cathode with improved lifetime
WO2003050837A1 (en) * 2001-12-10 2003-06-19 Thomson Licensing S.A. Cathode for cathode ray tube with improved lifetime
US7372192B2 (en) 2001-12-10 2008-05-13 Thomson Licensing Cathode for cathode ray tube with improved lifetime
CN100418175C (en) * 2001-12-10 2008-09-10 汤姆森许可贸易公司 Cathode for cathode ray tube with improved lifetime
KR100881091B1 (en) * 2001-12-10 2009-02-02 톰슨 라이센싱 Impregnated cathode for cathode-ray tube and cathode-ray tube comprising the same

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