FR2172354B1 - - Google Patents
Info
- Publication number
- FR2172354B1 FR2172354B1 FR7305566A FR7305566A FR2172354B1 FR 2172354 B1 FR2172354 B1 FR 2172354B1 FR 7305566 A FR7305566 A FR 7305566A FR 7305566 A FR7305566 A FR 7305566A FR 2172354 B1 FR2172354 B1 FR 2172354B1
- Authority
- FR
- France
- 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
- 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
- H01J1/16—Cathodes heated directly by an electric current characterised by the shape
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7202069A NL7202069A (es) | 1972-02-17 | 1972-02-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2172354A1 FR2172354A1 (es) | 1973-09-28 |
| FR2172354B1 true FR2172354B1 (es) | 1977-12-30 |
Family
ID=19815386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7305566A Expired FR2172354B1 (es) | 1972-02-17 | 1973-02-16 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3806753A (es) |
| JP (1) | JPS557655B2 (es) |
| CA (1) | CA990778A (es) |
| CH (1) | CH552281A (es) |
| DE (1) | DE2304771C3 (es) |
| FR (1) | FR2172354B1 (es) |
| GB (1) | GB1414392A (es) |
| NL (1) | NL7202069A (es) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1042105A1 (ru) * | 1980-02-05 | 1983-09-15 | Организация П/Я Х-5263 | Решетчатый катод пр мого накала дл электронных ламп и способ его изготовлени |
| FR2532468A1 (fr) * | 1982-08-31 | 1984-03-02 | Thomson Csf | Perfectionnement aux cathodes a chauffage direct |
| JPS6224307U (es) * | 1985-07-29 | 1987-02-14 | ||
| JPH0446165Y2 (es) * | 1985-08-23 | 1992-10-29 | ||
| JPS6239958U (es) * | 1985-08-23 | 1987-03-10 | ||
| FR2708379B1 (fr) * | 1993-07-27 | 1995-09-01 | Thomson Tubes Electroniques | Cathode à enclenchement et coupure rapides du chauffage et tube électronique à grille comportant une telle cathode. |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2928978A (en) * | 1956-08-03 | 1960-03-15 | Int Standard Electric Corp | Mounting of thermionic cathodes |
| GB830352A (en) * | 1956-08-03 | 1960-03-16 | Standard Telephones Cables Ltd | Improvements in or relating to the mounting of thermionic cathodes |
| GB987461A (en) * | 1962-05-31 | 1965-03-31 | Standard Telephones Cables Ltd | Thermionic valves |
| US3560791A (en) * | 1967-09-08 | 1971-02-02 | Siemens Ag | Mesh cathode for electron tubes |
-
1972
- 1972-02-17 NL NL7202069A patent/NL7202069A/xx not_active Application Discontinuation
-
1973
- 1973-02-01 DE DE2304771A patent/DE2304771C3/de not_active Expired
- 1973-02-02 US US00329198A patent/US3806753A/en not_active Expired - Lifetime
- 1973-02-12 CA CA163,524A patent/CA990778A/en not_active Expired
- 1973-02-14 JP JP1759373A patent/JPS557655B2/ja not_active Expired
- 1973-02-14 CH CH209173A patent/CH552281A/xx not_active IP Right Cessation
- 1973-02-14 GB GB722373A patent/GB1414392A/en not_active Expired
- 1973-02-16 FR FR7305566A patent/FR2172354B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH552281A (de) | 1974-07-31 |
| NL7202069A (es) | 1973-08-21 |
| CA990778A (en) | 1976-06-08 |
| US3806753A (en) | 1974-04-23 |
| DE2304771C3 (de) | 1982-03-04 |
| GB1414392A (en) | 1975-11-19 |
| DE2304771B2 (de) | 1977-09-15 |
| JPS4890669A (es) | 1973-11-26 |
| FR2172354A1 (es) | 1973-09-28 |
| JPS557655B2 (es) | 1980-02-27 |
| DE2304771A1 (de) | 1973-08-23 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |