GB650730A - Improvements in and relating to electron emitting materials - Google Patents
Improvements in and relating to electron emitting materialsInfo
- Publication number
- GB650730A GB650730A GB1898547A GB1898547A GB650730A GB 650730 A GB650730 A GB 650730A GB 1898547 A GB1898547 A GB 1898547A GB 1898547 A GB1898547 A GB 1898547A GB 650730 A GB650730 A GB 650730A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- reaction
- carried out
- materials
- binder
- 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
- H01J1/14—Solid thermionic cathodes characterised by the material
Landscapes
- Solid Thermionic Cathode (AREA)
Abstract
650,730. Cathode materials and processing. BRITISH THOMSON-HOUSTON CO., Ltd., VAUSE, A. S., and BROADBANK, R. W. C. July 16,1947, No. 18985. [Class 39 (i)] Barium zirconate, with the addition of an alkaline earth carbonate, or thorium oxide, is used as the emissive material for a thermionic cathode. It is prepared from barium carbonate and zirconium oxide milled together with the additional substance, in a suitable binder such as diluted acetone or gum tragacanth, dried and extruded as a rod, subsequently hydrogen stoved, for insertion in a wire helix. Alternatively the reaction may be carried out without a binder, the product powdered and applied to the cathode by dipping or spraying in a suitable medium, afterwards evaporated. The reaction may be carried out in situ after the application of the materials.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1898547A GB650730A (en) | 1947-07-16 | 1947-07-16 | Improvements in and relating to electron emitting materials |
| FR969123D FR969123A (en) | 1947-07-16 | 1948-07-12 | Advanced emitting thermionic cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1898547A GB650730A (en) | 1947-07-16 | 1947-07-16 | Improvements in and relating to electron emitting materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB650730A true GB650730A (en) | 1951-02-28 |
Family
ID=10121804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1898547A Expired GB650730A (en) | 1947-07-16 | 1947-07-16 | Improvements in and relating to electron emitting materials |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR969123A (en) |
| GB (1) | GB650730A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE974888C (en) * | 1952-03-24 | 1961-05-25 | Philips Nv | Process for the manufacture of a cathode for electrical discharge tubes |
-
1947
- 1947-07-16 GB GB1898547A patent/GB650730A/en not_active Expired
-
1948
- 1948-07-12 FR FR969123D patent/FR969123A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE974888C (en) * | 1952-03-24 | 1961-05-25 | Philips Nv | Process for the manufacture of a cathode for electrical discharge tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| FR969123A (en) | 1950-12-14 |
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