GB733191A - Improvements relating to cathodes for electron emissive devices - Google Patents
Improvements relating to cathodes for electron emissive devicesInfo
- Publication number
- GB733191A GB733191A GB2708052A GB2708052A GB733191A GB 733191 A GB733191 A GB 733191A GB 2708052 A GB2708052 A GB 2708052A GB 2708052 A GB2708052 A GB 2708052A GB 733191 A GB733191 A GB 733191A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- tungsten
- materials
- barium aluminate
- cathodes
- 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
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
Landscapes
- Solid Thermionic Cathode (AREA)
Abstract
733,191. Cathode materials and processing. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Oct: 27, 1953 [Oct. 28, 1952], No. 27080/52. Class 39 (1). A thermionic cathode consists of a block of tungsten impregnated with barium aluminate, e.g. by mixing these materials, preforming under pressure and sintering, or by forming a porous block of tungsten and then soaking it in fused barium aluminate. Such a cathode may be formed as a disc with a flat or slightly concave surface and mounted in one end of a cylinder, or on radially-extending arms, with a heater behind it for producing an electron beam. According to the Provisional Specification the cathode may contain a further supply of barium aluminate in an inner compartment, and tungsten may be replaced by other refractory materials.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2708052A GB733191A (en) | 1952-10-28 | 1952-10-28 | Improvements relating to cathodes for electron emissive devices |
| FR1085710D FR1085710A (en) | 1952-10-28 | 1953-10-28 | Porous emissive cathodes |
| GB3066953A GB767718A (en) | 1952-10-28 | 1953-11-05 | "improvements relating to electron emissive cathodes" |
| FR67359D FR67359E (en) | 1952-10-28 | 1954-11-05 | Porous emissive cathodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2708052A GB733191A (en) | 1952-10-28 | 1952-10-28 | Improvements relating to cathodes for electron emissive devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB733191A true GB733191A (en) | 1955-07-06 |
Family
ID=10253839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2708052A Expired GB733191A (en) | 1952-10-28 | 1952-10-28 | Improvements relating to cathodes for electron emissive devices |
Country Status (2)
| Country | Link |
|---|---|
| FR (2) | FR1085710A (en) |
| GB (1) | GB733191A (en) |
-
1952
- 1952-10-28 GB GB2708052A patent/GB733191A/en not_active Expired
-
1953
- 1953-10-28 FR FR1085710D patent/FR1085710A/en not_active Expired
-
1954
- 1954-11-05 FR FR67359D patent/FR67359E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR67359E (en) | 1958-03-06 |
| FR1085710A (en) | 1955-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB716412A (en) | Improvements in cylindrical cathodes | |
| GB568962A (en) | Improvements in or relating to cathodes for electron discharge devices | |
| ES206484A1 (en) | Cathode containing a supply of an electron-emissive material | |
| GB441250A (en) | Improvements in and relating to oxide coated cathodes for gaseous electric discharge devices | |
| GB800219A (en) | Improvements in or relating to cathodes of the dispenser type | |
| GB478024A (en) | Improvements in or relating to thermionic cathodes for high pressure metal vapour discharge devices | |
| GB733191A (en) | Improvements relating to cathodes for electron emissive devices | |
| GB1270339A (en) | Improvements in and relating to electron beam apparatus | |
| GB804697A (en) | Improvements in x-ray tubes | |
| GB518574A (en) | Improvements in or relating to cathode ray tubes | |
| GB791495A (en) | Improvements in or relating to cathodes of the dispenser type | |
| GB425739A (en) | Improvements in or relating to thermionic valve arrangements | |
| GB919419A (en) | Improvements in or relating to impregnated cathodes suitable for use in electric discharge tubes | |
| GB701871A (en) | Improvements in or relating to cathodes for electric discharge tubes and methods of producing such cathodes | |
| GB704737A (en) | Improvements in or relating to x-ray tubes | |
| GB705126A (en) | Improvements in or relating to cathodes for electric discharge tubes | |
| GB417027A (en) | Improvements in or relating to thermionic valves | |
| GB415398A (en) | Improvements relating to indirectly heated cathodes for electron discharge devices | |
| GB392849A (en) | Improvements in or relating to electric discharge devices | |
| GB1070377A (en) | Improvements in or relating to thermionic cathodes and to electron discharge devices employing thermionic cathodes | |
| GB767718A (en) | "improvements relating to electron emissive cathodes" | |
| GB573612A (en) | Improvements in or relating to methods of activating cathodes for electron dischargedevices | |
| GB731614A (en) | Improvements in or relating to thermionic cathodes | |
| GB795566A (en) | Improvements in or relating to thermionic dispenser cathodes | |
| GB698429A (en) | Improvements in or relating to thermionic cathodes for electronic discharge devices |