NL28875C - - Google Patents
Info
- Publication number
- NL28875C NL28875C NL28875DA NL28875C NL 28875 C NL28875 C NL 28875C NL 28875D A NL28875D A NL 28875DA NL 28875 C NL28875 C NL 28875C
- 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 |
|---|---|---|---|
| NL362627X | 1930-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL28875C true NL28875C (en) |
Family
ID=19785436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL28875D NL28875C (en) | 1930-01-22 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1875106A (en) |
| DE (1) | DE625602C (en) |
| FR (1) | FR708235A (en) |
| GB (1) | GB362627A (en) |
| NL (1) | NL28875C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2456579A (en) * | 1942-10-30 | 1948-12-14 | Rca Corp | Electron discharge device for ultra high frequencies |
| GB810202A (en) * | 1955-06-10 | 1959-03-11 | Vickers Electrical Co Ltd | Improvements relating to thermionic cathodes for electron discharge devices |
-
0
- NL NL28875D patent/NL28875C/xx active
-
1930
- 1930-11-12 GB GB34062/30A patent/GB362627A/en not_active Expired
- 1930-11-15 US US495806A patent/US1875106A/en not_active Expired - Lifetime
- 1930-12-22 FR FR708235D patent/FR708235A/en not_active Expired
- 1930-12-24 DE DE1930625602D patent/DE625602C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1875106A (en) | 1932-08-30 |
| FR708235A (en) | 1931-07-21 |
| GB362627A (en) | 1931-12-10 |
| DE625602C (en) | 1936-02-12 |