NL52447C - - Google Patents
Info
- Publication number
- NL52447C NL52447C NL52447DA NL52447C NL 52447 C NL52447 C NL 52447C NL 52447D A NL52447D A NL 52447DA NL 52447 C NL52447 C NL 52447C
- Authority
- NL
- Netherlands
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 |
|---|---|---|---|
| DE2222021X | 1938-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL52447C true NL52447C (en:Method) |
Family
ID=7990876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL52447D NL52447C (en:Method) | 1938-02-04 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2222021A (en:Method) |
| NL (1) | NL52447C (en:Method) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL66444C (en:Method) * | 1945-08-30 | |||
| BE484368A (en:Method) * | 1947-08-15 | |||
| FR2276681A1 (fr) * | 1974-06-28 | 1976-01-23 | Thomson Csf | Grille pour tube electronique et tube comportant une telle grille |
-
0
- NL NL52447D patent/NL52447C/xx active
-
1939
- 1939-02-04 US US254653A patent/US2222021A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2222021A (en) | 1940-11-19 |