DE2962924D1 - Directly heated cathode and high frequency electron tube comprising such a cathode - Google Patents
Directly heated cathode and high frequency electron tube comprising such a cathodeInfo
- Publication number
- DE2962924D1 DE2962924D1 DE7979400941T DE2962924T DE2962924D1 DE 2962924 D1 DE2962924 D1 DE 2962924D1 DE 7979400941 T DE7979400941 T DE 7979400941T DE 2962924 T DE2962924 T DE 2962924T DE 2962924 D1 DE2962924 D1 DE 2962924D1
- Authority
- DE
- Germany
- Prior art keywords
- cathode
- high frequency
- electron tube
- directly heated
- frequency electron
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/04—Cathodes
- H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
-
- 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
- H01J1/15—Cathodes heated directly by an electric current
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7836487A FR2445605A1 (fr) | 1978-12-27 | 1978-12-27 | Cathode a chauffage direct et tube electronique haute frequence comportant une telle cathode |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2962924D1 true DE2962924D1 (en) | 1982-07-08 |
Family
ID=9216585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE7979400941T Expired DE2962924D1 (en) | 1978-12-27 | 1979-11-30 | Directly heated cathode and high frequency electron tube comprising such a cathode |
Country Status (4)
Country | Link |
---|---|
US (1) | US4429250A (de) |
EP (1) | EP0013201B1 (de) |
DE (1) | DE2962924D1 (de) |
FR (1) | FR2445605A1 (de) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2498372A1 (fr) * | 1981-01-16 | 1982-07-23 | Thomson Csf | Cathode a chauffage direct, son procede de fabrication, et tube electronique incorporant une telle cathode |
DE3467467D1 (en) * | 1983-09-30 | 1987-12-17 | Bbc Brown Boveri & Cie | Thermionic cathode capable of high emission for an electron tube, and method of manufacture |
JPS60221926A (ja) * | 1984-04-19 | 1985-11-06 | Sony Corp | 放電表示装置の製造方法 |
JPS60221928A (ja) * | 1984-04-19 | 1985-11-06 | Sony Corp | 放電表示装置の製造方法 |
US4994706A (en) * | 1987-02-02 | 1991-02-19 | The United States Of America As Represented By The United States Department Of Energy | Field free, directly heated lanthanum boride cathode |
CA1286710C (en) * | 1987-11-12 | 1991-07-23 | Atomic Energy Of Canada Limited - Energie Atomique Du Canada, Limitee | Electron gun design using a lanthanum hexaboride cathode |
GB2214704B (en) * | 1988-01-20 | 1992-05-06 | English Electric Valve Co Ltd | Magnetrons |
US5841219A (en) * | 1993-09-22 | 1998-11-24 | University Of Utah Research Foundation | Microminiature thermionic vacuum tube |
FR2733856B1 (fr) * | 1995-05-05 | 1997-08-29 | Thomson Tubes Electroniques | Cathode pour canon a electrons a grille, grille destinee a etre associee avec une telle cathode et canon a electrons comportant une telle cathode |
US5956002A (en) * | 1996-03-28 | 1999-09-21 | Tektronix, Inc. | Structures and methods for limiting current in ionizable gaseous medium devices |
US5955828A (en) * | 1996-10-16 | 1999-09-21 | University Of Utah Research Foundation | Thermionic optical emission device |
FR2775118B1 (fr) | 1998-02-13 | 2000-05-05 | Thomson Tubes Electroniques | Grille pour tube electronique a faisceau axial a performances ameliorees |
FR2789800B1 (fr) | 1999-02-16 | 2001-05-11 | Thomson Tubes Electroniques | Generateur radiofrequence de tres grande puissance |
US20090284124A1 (en) * | 2008-04-22 | 2009-11-19 | Wolfgang Kutschera | Cathode composed of materials with different electron works functions |
DE102008020165A1 (de) * | 2008-04-22 | 2009-10-29 | Siemens Aktiengesellschaft | Kathode mit einem Flachemitter |
DE102008020163A1 (de) * | 2008-04-22 | 2009-10-29 | Siemens Aktiengesellschaft | Kathode |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE524279C (de) * | 1929-03-15 | 1931-05-13 | Mueller Hans | Gluehelektrode mit einem metallischen Traeger fuer die emittierenden Substanzen |
BE502232A (de) * | 1950-03-31 | |||
US2900281A (en) * | 1953-07-20 | 1959-08-18 | Gen Electric | Method of bonding metal borides to graphite |
US3312856A (en) * | 1963-03-26 | 1967-04-04 | Gen Electric | Rhenium supported metallic boride cathode emitters |
DE1211724B (de) * | 1963-06-07 | 1966-03-03 | Telefunken Patent | Gepresste Matrixkathode fuer elektrische Entladungsroehren |
US3389290A (en) * | 1965-04-06 | 1968-06-18 | Sony Corp | Electron gun device |
GB1045396A (en) * | 1965-07-23 | 1966-10-12 | Standard Telephones Cables Ltd | Thermionic cathodes |
US3436584A (en) * | 1966-03-15 | 1969-04-01 | Gen Electric | Electron emission source with sharply defined emitting area |
DE1283403B (de) * | 1966-08-05 | 1968-11-21 | Siemens Ag | Mittelbar geheizte Vorratskathode fuer elektrische Entladungsgefaesse |
FR1539067A (fr) * | 1966-08-05 | 1968-09-13 | Siemens Ag | Cathode à réserve pour tubes à décharge électrique, notamment pour tubes électroniques |
DE1614938A1 (de) * | 1966-09-26 | 1970-12-23 | Atomic Energy Authority Uk | Elektronen emittierende Kathode,insbesondere fuer Elektronen-Bestrahlungsmaschinen |
DE1800945B2 (de) * | 1968-10-03 | 1972-03-30 | Siemens AG, 1000 Berlin u. 8000 München | Verfahren und elektrodenausgangsmaterial fuer die herstellung einer thorium filmkathode fuer elektrische entladungsgefaesse |
US3532923A (en) * | 1969-03-17 | 1970-10-06 | Ibm | Pyrolytic graphite support for lanthanum hexaboride cathode emitter |
NL7207276A (de) * | 1972-05-30 | 1973-12-04 | ||
JPS50151056A (de) * | 1974-05-24 | 1975-12-04 | ||
DE2732960C2 (de) * | 1977-07-21 | 1982-04-01 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Glühkathode und Verfahren zu ihrer Herstellung |
CH617793A5 (de) * | 1977-09-02 | 1980-06-13 | Balzers Hochvakuum | |
JPS58813B2 (ja) * | 1977-09-30 | 1983-01-08 | 株式会社日立製作所 | 電子管陰極及びその製造方法 |
CH629033A5 (de) * | 1978-05-05 | 1982-03-31 | Bbc Brown Boveri & Cie | Gluehkathode. |
-
1978
- 1978-12-27 FR FR7836487A patent/FR2445605A1/fr active Granted
-
1979
- 1979-11-30 EP EP79400941A patent/EP0013201B1/de not_active Expired
- 1979-11-30 DE DE7979400941T patent/DE2962924D1/de not_active Expired
-
1981
- 1981-09-18 US US06/303,464 patent/US4429250A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2445605B1 (de) | 1981-06-12 |
FR2445605A1 (fr) | 1980-07-25 |
EP0013201A1 (de) | 1980-07-09 |
EP0013201B1 (de) | 1982-05-19 |
US4429250A (en) | 1984-01-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8331 | Complete revocation |