GB424912A - Improvements in and relating to thermionic cathodes - Google Patents
Improvements in and relating to thermionic cathodesInfo
- Publication number
- GB424912A GB424912A GB3358333A GB3358333A GB424912A GB 424912 A GB424912 A GB 424912A GB 3358333 A GB3358333 A GB 3358333A GB 3358333 A GB3358333 A GB 3358333A GB 424912 A GB424912 A GB 424912A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- helix
- thermionic cathodes
- relating
- heater
- 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
- H01J1/22—Heaters
Landscapes
- Microwave Tubes (AREA)
Abstract
424,912. Thermionic cathodes. FERRANTI, Ltd., and EASTON, G. P., Hollinwood, Lancashire. Nov. 30, 1933, No. 33583. [Class 39 (i)] In an indirectly-heated cathode of circular crosssection, the heater comprises a plurality of separately insulated conductor wire lengths f which are held against the inner wall of the cathode a by suitable means leaving the inner space substantially unoccupied. The means may be a helix c or a thinwalled, optionally perforated, tube of nickel &c. Alternatively, plugs or cones may be inserted at each end of the cathode. The helix may be connected to the cathode at d or may act as a return lead for the heating current. If the cathode is closed at the top the helix c may be suspended therefrom. The heater wire may be formed into a fine helix before use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3358333A GB424912A (en) | 1933-11-30 | 1933-11-30 | Improvements in and relating to thermionic cathodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3358333A GB424912A (en) | 1933-11-30 | 1933-11-30 | Improvements in and relating to thermionic cathodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB424912A true GB424912A (en) | 1935-03-04 |
Family
ID=10354801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3358333A Expired GB424912A (en) | 1933-11-30 | 1933-11-30 | Improvements in and relating to thermionic cathodes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB424912A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2436907A (en) * | 1945-06-23 | 1948-03-02 | Nasa | Indirectly heated cathode |
-
1933
- 1933-11-30 GB GB3358333A patent/GB424912A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2436907A (en) * | 1945-06-23 | 1948-03-02 | Nasa | Indirectly heated cathode |
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