JPS57115739A - Impregnation-type cathode - Google Patents
Impregnation-type cathodeInfo
- 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
- density emitter
- base metal
- density
- emitter member
- 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
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
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
Landscapes
- Microwave Tubes (AREA)
- Solid Thermionic Cathode (AREA)
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.
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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000009400A (en) * | 1998-07-24 | 2000-02-15 | 김영남 | Cathode for cathode-ray tube and manufacturing method thereof |
| FR2833406A1 (en) * | 2001-12-10 | 2003-06-13 | Thomson Licensing Sa | VACUUM TUBE CATHODE WITH IMPROVED LIFETIME |
-
1981
- 1981-01-12 JP JP205481A patent/JPS57115739A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000009400A (en) * | 1998-07-24 | 2000-02-15 | 김영남 | Cathode for cathode-ray tube and manufacturing method thereof |
| 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 | Injection cathode for cathode ray tube and cathode ray tube comprising such cathode |
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