FR743403A - - Google Patents
Info
- Publication number
- FR743403A FR743403A FR743403DA FR743403A FR 743403 A FR743403 A FR 743403A FR 743403D A FR743403D A FR 743403DA FR 743403 A FR743403 A FR 743403A
- 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
- 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
- H01J1/24—Insulating layer or body located between heater and emissive material
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR743403A true FR743403A (lt) | 1933-03-29 |
Family
ID=1547665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR743403D Expired FR743403A (lt) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR743403A (lt) |
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0
- FR FR743403D patent/FR743403A/fr not_active Expired