GB417446A - Improvements in or relating to cathode elements for use in thermionic tubes, electric discharge tubes and the like - Google Patents
Improvements in or relating to cathode elements for use in thermionic tubes, electric discharge tubes and the likeInfo
- Publication number
- GB417446A GB417446A GB315833A GB315833A GB417446A GB 417446 A GB417446 A GB 417446A GB 315833 A GB315833 A GB 315833A GB 315833 A GB315833 A GB 315833A GB 417446 A GB417446 A GB 417446A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- tubes
- heating element
- relating
- 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
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
Landscapes
- Solid Thermionic Cathode (AREA)
Abstract
417,446. Thermionic valves. COSSOR, Ltd., A. C., and ROBINS, T. A., 22, Highbury Grove, London. Feb. 2, 1933, No. 3158. [Class 39 (i).] An indirectly heated cathode is formed by loosely mounting on an insulated heating element 4 a metal tube a, Fig. 4, plate 1, Fig. 7, clip 8, Fig. 10, or hook 11, Fig. 15, and then covering the heating element by plating or spraying with a metal coating, which forms a conducting surface continuous with the tube or plate r. The metal coating is covered with an electron emitting material. The plate 1 has two slots 2 formed therein, the tongues 3 moved to form these slots resting on the heating element. As shown in Figs. 7, 10 and 15 the electrode is tensioned by a spring 7, whose lower end is formed with a hook to support the plate 1 &c. ; the spring rests on an insulated plate 18 provided with a tongue 19 which forms the connecting terminal for the electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB315833A GB417446A (en) | 1933-02-02 | 1933-02-02 | Improvements in or relating to cathode elements for use in thermionic tubes, electric discharge tubes and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB315833A GB417446A (en) | 1933-02-02 | 1933-02-02 | Improvements in or relating to cathode elements for use in thermionic tubes, electric discharge tubes and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB417446A true GB417446A (en) | 1934-10-02 |
Family
ID=9753030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB315833A Expired GB417446A (en) | 1933-02-02 | 1933-02-02 | Improvements in or relating to cathode elements for use in thermionic tubes, electric discharge tubes and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB417446A (en) |
-
1933
- 1933-02-02 GB GB315833A patent/GB417446A/en not_active Expired
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