JPS6433826A - Cathode structure for electron tube - Google Patents
Cathode structure for electron tubeInfo
- 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
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.
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)
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 |
-
1987
- 1987-07-29 JP JP18942987A patent/JPH07105189B2/en not_active Expired - Lifetime
Patent Citations (1)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071113 Year of fee payment: 12 |