GB515288A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB515288A GB515288A GB1780738A GB1780738A GB515288A GB 515288 A GB515288 A GB 515288A GB 1780738 A GB1780738 A GB 1780738A GB 1780738 A GB1780738 A GB 1780738A GB 515288 A GB515288 A GB 515288A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- wire
- cathode
- parts
- class
- 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
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/18—Supports; Vibration-damping arrangements
Landscapes
- Solid Thermionic Cathode (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
515,288. Thermionic valves. M-O VALVE CO., Ltd., COSGROVE, C. W., and GANT, E. C. R. June 15, 1938, No. 17807. [Class 39 (i)] In a thermionic valve comprising at least one wire grid closely surrounding the cathode, part or parts of the wire forming this grid is or are coated with adherent insulating material and displaced relatively to neighbouring non- insulated parts of the grid so as to bear against and locate the cathode. In the form shown, the wire grid 2.wound on supports 3 has deformed parts 4, 4<1> coated with adherent insulating layers 5, 51 bearing against the filament 1. The insulation material such as magnesia or alumina, may be applied, for example, by painting or spraying a suspension, before or after the deformation. The cathode may be indirectly heated. The Provisional Specification describes a grid formed of a plurality of wires welded to supports, a kinked or bowed wire being substituted for one of the grid wires, and refers to a grid formed of wire mesh and to the use of porcelain as the insulating material. Specifications 285,537, and 295,904, [both in Class 39 (i)], are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1780738A GB515288A (en) | 1938-06-15 | 1938-06-15 | Improvements in and relating to electric discharge devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1780738A GB515288A (en) | 1938-06-15 | 1938-06-15 | Improvements in and relating to electric discharge devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB515288A true GB515288A (en) | 1939-11-30 |
Family
ID=10101569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1780738A Expired GB515288A (en) | 1938-06-15 | 1938-06-15 | Improvements in and relating to electric discharge devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB515288A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2570606A (en) * | 1949-05-12 | 1951-10-09 | Rca Corp | Damper bar for filamentary cathodes |
-
1938
- 1938-06-15 GB GB1780738A patent/GB515288A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2570606A (en) * | 1949-05-12 | 1951-10-09 | Rca Corp | Damper bar for filamentary cathodes |
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