NL33389C - - Google Patents
Info
- Publication number
- NL33389C NL33389C NL33389DA NL33389C NL 33389 C NL33389 C NL 33389C NL 33389D A NL33389D A NL 33389DA NL 33389 C NL33389 C NL 33389C
- 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
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US487541A US1924375A (en) | 1930-10-09 | 1930-10-09 | Cathode structure for thermionic devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL33389C true NL33389C (en:Method) |
Family
ID=23936153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL33389D NL33389C (en:Method) | 1930-10-09 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1924375A (en:Method) |
| GB (1) | GB386376A (en:Method) |
| NL (1) | NL33389C (en:Method) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2418117A (en) * | 1944-05-29 | 1947-04-01 | Bell Telephone Labor Inc | Electron discharge device |
| US2513255A (en) * | 1948-03-03 | 1950-06-27 | Electrons Inc | Grid control metal envelope gas tube |
| NL159006C (en:Method) * | 1950-02-15 |
-
0
- NL NL33389D patent/NL33389C/xx active
-
1930
- 1930-10-09 US US487541A patent/US1924375A/en not_active Expired - Lifetime
-
1931
- 1931-10-09 GB GB28128/31A patent/GB386376A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1924375A (en) | 1933-08-29 |
| GB386376A (en) | 1933-01-19 |