GB332734A - Improvements in electric discharge devices - Google Patents
Improvements in electric discharge devicesInfo
- Publication number
- GB332734A GB332734A GB2887928A GB2887928A GB332734A GB 332734 A GB332734 A GB 332734A GB 2887928 A GB2887928 A GB 2887928A GB 2887928 A GB2887928 A GB 2887928A GB 332734 A GB332734 A GB 332734A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- tube
- grids
- specifications
- electric discharge
- 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
- H01J1/30—Cold cathodes, e.g. field-emissive cathode
Landscapes
- X-Ray Techniques (AREA)
- Particle Accelerators (AREA)
Abstract
332,734. Crowne, A. A. J. July 4, 1929. Vacuum tubes.-A, cathode consists of a radioactive substance such as uranium and a photoelectric substance such as rubidium or potassium. The cathode may be cold, or heated directly or indirectly by a heater which may be shielded from the cathode, or energization may be by light, heat or other radiation; it may be of flat or curved shape, such as a cylinder, rectangular tube, sphere, cone, or ellipsoidal or paraboloidal tube. The material of the cathode may be powdered and enclosed in a thin wall or mesh permeable to #-rays, or it may be coated on a support, or in liquid form in a thin tube. One or more grids and anodes are mounted around the cathode and one of the grids may be a screening grid. The envelope may contain gases at low pressure. Specifications 148,132 156,230, 184,446, 195,691, 207,514, 225,234, 241,996, 255,983, 267,902, 271,401, 289,381, and 309,241 are referred to. Reference has been directed by the Comptroller to Specifications 148,132, 267,142, and 267,902.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2887928A GB332734A (en) | 1929-07-04 | 1929-07-04 | Improvements in electric discharge devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2887928A GB332734A (en) | 1929-07-04 | 1929-07-04 | Improvements in electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB332734A true GB332734A (en) | 1930-08-07 |
Family
ID=10282635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2887928A Expired GB332734A (en) | 1929-07-04 | 1929-07-04 | Improvements in electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB332734A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2669609A (en) * | 1948-10-30 | 1954-02-16 | Rca Corp | Electron discharge device |
| US2728005A (en) * | 1949-03-09 | 1955-12-20 | Victoreen Instr Company | Gaseous discharge tube |
| GB2190786A (en) * | 1986-05-21 | 1987-11-25 | Oxford Appl Res Ltd | Liquid metal field emission electron source |
-
1929
- 1929-07-04 GB GB2887928A patent/GB332734A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2669609A (en) * | 1948-10-30 | 1954-02-16 | Rca Corp | Electron discharge device |
| US2728005A (en) * | 1949-03-09 | 1955-12-20 | Victoreen Instr Company | Gaseous discharge tube |
| GB2190786A (en) * | 1986-05-21 | 1987-11-25 | Oxford Appl Res Ltd | Liquid metal field emission electron source |
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