FR874688A - Cathode - Google Patents
CathodeInfo
- Publication number
- FR874688A FR874688A FR874688DA FR874688A FR 874688 A FR874688 A FR 874688A FR 874688D A FR874688D A FR 874688DA FR 874688 A FR874688 A FR 874688A
- Authority
- FR
- France
- Prior art keywords
- cathode
- 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
- 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 |
---|---|---|---|
DE217878X | 1940-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR874688A true FR874688A (fr) | 1942-08-18 |
Family
ID=5830999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR874688D Expired FR874688A (fr) | 1940-04-30 | 1941-08-12 | Cathode |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE441216A (de) |
CH (1) | CH217878A (de) |
FR (1) | FR874688A (de) |
NL (1) | NL54367C (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0520445A1 (de) * | 1991-06-25 | 1992-12-30 | Nec Corporation | Heizelement für Elektronröhren |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2422142A (en) * | 1945-05-26 | 1947-06-10 | Machlett Lab Inc | Cathode structure for electron discharge devices |
-
0
- BE BE441216D patent/BE441216A/xx unknown
- NL NL54367D patent/NL54367C/xx active
-
1941
- 1941-04-08 CH CH217878D patent/CH217878A/de unknown
- 1941-08-12 FR FR874688D patent/FR874688A/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0520445A1 (de) * | 1991-06-25 | 1992-12-30 | Nec Corporation | Heizelement für Elektronröhren |
Also Published As
Publication number | Publication date |
---|---|
CH217878A (de) | 1941-11-15 |
NL54367C (de) | |
BE441216A (de) |
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