JPS6433826A - Cathode structure for electron tube - Google Patents

Cathode structure for electron tube

Info

Publication number
JPS6433826A
JPS6433826A JP18942987A JP18942987A JPS6433826A JP S6433826 A JPS6433826 A JP S6433826A JP 18942987 A JP18942987 A JP 18942987A JP 18942987 A JP18942987 A JP 18942987A JP S6433826 A JPS6433826 A JP S6433826A
Authority
JP
Japan
Prior art keywords
insulator
electron tube
cathode
cathode structure
heater
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.)
Granted
Application number
JP18942987A
Other languages
Japanese (ja)
Other versions
JPH07105189B2 (en
Inventor
Kazuo Kobayashi
Sakae Kimura
Akito Hara
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.)
Toshiba Corp
Toshiba Development and Engineering Corp
Original Assignee
Toshiba Corp
Toshiba Electronic Device Engineering Co 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 Toshiba Corp, Toshiba Electronic Device Engineering Co Ltd filed Critical Toshiba Corp
Priority to JP18942987A priority Critical patent/JPH07105189B2/en
Publication of JPS6433826A publication Critical patent/JPS6433826A/en
Publication of JPH07105189B2 publication Critical patent/JPH07105189B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To prevent grains from dropping from the surface of the heater leg side of an insulator by forming a surface layer made of fine grains of the same material as the insulator on the heater leg side of the insulator. CONSTITUTION:A cathode substrate metal 1 is fixed at one end of a cathode support cylinder 5, a spiral heater 3 is arranged in this cathode support cylinder 5 and buried by an insulator 2. A surface layer 6 made of fine grains of the same material as the insulator 2 is formed on the heater leg 3a side of the insulator 2 in the cathode structure of an electron tube, the average grain size of the surface layer 6 is set to the range of 10-50mum, and its thickness is set to the range of 0.01-0.5mm. The cathode structure of an electron tube in which no sintered body grains drop from the surface of the heater leg 3a side can be thereby obtained.
JP18942987A 1987-07-29 1987-07-29 Electron tube cathode assembly Expired - Lifetime JPH07105189B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18942987A JPH07105189B2 (en) 1987-07-29 1987-07-29 Electron tube cathode assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18942987A JPH07105189B2 (en) 1987-07-29 1987-07-29 Electron tube cathode assembly

Publications (2)

Publication Number Publication Date
JPS6433826A true JPS6433826A (en) 1989-02-03
JPH07105189B2 JPH07105189B2 (en) 1995-11-13

Family

ID=16241098

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18942987A Expired - Lifetime JPH07105189B2 (en) 1987-07-29 1987-07-29 Electron tube cathode assembly

Country Status (1)

Country Link
JP (1) JPH07105189B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5866544U (en) * 1981-10-30 1983-05-06 株式会社東芝 Electron tube cathode heater structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5866544U (en) * 1981-10-30 1983-05-06 株式会社東芝 Electron tube cathode heater structure

Also Published As

Publication number Publication date
JPH07105189B2 (en) 1995-11-13

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