GB446652A - Improvements in and relating to indirectly heated cathodes - Google Patents
Improvements in and relating to indirectly heated cathodesInfo
- Publication number
- GB446652A GB446652A GB2255034A GB2255034A GB446652A GB 446652 A GB446652 A GB 446652A GB 2255034 A GB2255034 A GB 2255034A GB 2255034 A GB2255034 A GB 2255034A GB 446652 A GB446652 A GB 446652A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- indirectly heated
- spiral
- heater
- 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
- H01J1/24—Insulating layer or body located between heater and emissive material
Landscapes
- Discharge Lamp (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
446,652. Thermionic cathodes. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London. Aug. 2, 1934, No. 22550. Void [Abridged as open to inspection under Sect. 91 of the Acts, Feb. 4, 1935]. [Class 39 (i)] In indirectly heated cathodes, the heater filament is spaced from the metal - coated insulator carrying the emissive material. The filament may be straight or in form of a spiral 1, Fig. 5, supported by a spring 7 and passing through blocks 6 closing the end of the space enclosing the heater in order to prevent electron flow from the interior of the electrode into the discharge space. A hairpin filament may be used and in this form the filament 1, Fig. 3 may be rectangular in cross section. In another arrangement four spirals 1, Fig. 4, may be used, each spiral having an insulating coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2255034A GB446652A (en) | 1934-08-02 | 1934-08-02 | Improvements in and relating to indirectly heated cathodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2255034A GB446652A (en) | 1934-08-02 | 1934-08-02 | Improvements in and relating to indirectly heated cathodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB446652A true GB446652A (en) | 1935-02-04 |
Family
ID=10181228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2255034A Expired GB446652A (en) | 1934-08-02 | 1934-08-02 | Improvements in and relating to indirectly heated cathodes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB446652A (en) |
-
1934
- 1934-08-02 GB GB2255034A patent/GB446652A/en not_active Expired
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