FR551008A - - Google Patents
Info
- Publication number
- FR551008A FR551008A FR551008DA FR551008A FR 551008 A FR551008 A FR 551008A FR 551008D A FR551008D A FR 551008DA FR 551008 A FR551008 A FR 551008A
- 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
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
- H01J9/042—Manufacture, activation of the emissive part
-
- 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
- H01J1/14—Solid thermionic cathodes characterised by the material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
- Discharge Lamp (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW58277D DE543440C (de) | 1921-05-07 | 1921-05-07 | Kathode fuer Entladungsroehren |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR551008A true FR551008A (fr) | 1923-03-26 |
Family
ID=7605442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR551008D Expired FR551008A (fr) | 1921-05-07 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE543440C (fr) |
| FR (1) | FR551008A (fr) |
| GB (1) | GB179565A (fr) |
-
0
- FR FR551008D patent/FR551008A/fr not_active Expired
-
1921
- 1921-05-07 DE DEW58277D patent/DE543440C/de not_active Expired
-
1922
- 1922-05-08 GB GB1298522A patent/GB179565A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE543440C (de) | 1932-02-06 |
| GB179565A (fr) | 1923-11-08 |