FR2011137A6 - Cathode for electric discharge tubes - Google Patents
Cathode for electric discharge tubesInfo
- Publication number
- FR2011137A6 FR2011137A6 FR6919953A FR6919953A FR2011137A6 FR 2011137 A6 FR2011137 A6 FR 2011137A6 FR 6919953 A FR6919953 A FR 6919953A FR 6919953 A FR6919953 A FR 6919953A FR 2011137 A6 FR2011137 A6 FR 2011137A6
- Authority
- FR
- France
- Prior art keywords
- electric discharge
- discharge tubes
- cathode
- metal
- support
- Prior art date
- 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
- H01J1/26—Supports for the emissive material
-
- 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
- Coating By Spraying Or Casting (AREA)
- Discharge Lamp (AREA)
Abstract
Or for electric discharge tubes. Support is of high-m.p. metal, particularly W, containing Th oxide and has coating comprising internal layer of tungsten carbide and external layer which is emission base and is high-m.p. metal with thorium migration properties as in Fr. Pat. 1569373 (19.6.68). External layer, particularly Re, is deposited on metallic carbided support which is alloy of W and 5-25% Re.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681764509 DE1764509A1 (en) | 1968-06-18 | 1968-06-18 | Thorium film cathode for electrical discharge vessels |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2011137A6 true FR2011137A6 (en) | 1970-02-27 |
Family
ID=5698015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR6919953A Expired FR2011137A6 (en) | 1968-06-18 | 1969-06-16 | Cathode for electric discharge tubes |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1764509A1 (en) |
FR (1) | FR2011137A6 (en) |
NL (1) | NL6909169A (en) |
-
1968
- 1968-06-18 DE DE19681764509 patent/DE1764509A1/en active Pending
-
1969
- 1969-06-16 FR FR6919953A patent/FR2011137A6/en not_active Expired
- 1969-06-16 NL NL6909169A patent/NL6909169A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL6909169A (en) | 1969-12-22 |
DE1764509A1 (en) | 1971-08-05 |
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