GB597681A - Improvements relating to indirectly heated thermionic cathodes - Google Patents
Improvements relating to indirectly heated thermionic cathodesInfo
- Publication number
- GB597681A GB597681A GB2478845A GB2478845A GB597681A GB 597681 A GB597681 A GB 597681A GB 2478845 A GB2478845 A GB 2478845A GB 2478845 A GB2478845 A GB 2478845A GB 597681 A GB597681 A GB 597681A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- metal
- end plates
- plates
- discs
- 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
- 239000002184 metal Substances 0.000 abstract 5
- 230000037250 Clearance Effects 0.000 abstract 1
- 210000002105 Tongue Anatomy 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 230000035512 clearance Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/04—Cathodes
- H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
Landscapes
- Microwave Tubes (AREA)
Abstract
597,681. Thermionic valves: BRITISH THOMSON-HOUSTON CO., Ltd., and RUSHFORTH, L. Sept. 25, 1945, No. 24788. [Class 39 (i)] An indirectly heated cathode, particularly for magnetrons, comprises a metal cylinder 1 with an electron emissive outer surface, the ends of which are closed by metal plates 3, 4 to which is attached, preferably under tension, a heating element 2. Both end plates are insulated from the cylinder by flanged ceramic discs 8 which fit into the ends of the cylinder and are carried in flanged metal cups 9 which are spot welded to the discs 3, 4. Metal strips 12 are welded to the cylinder and are bent over to engage the outer surface of the discs, clearance holes being provided in the end plates 3, 4 and the cups 9. Alternatively, where the end plates are to provide the cathode lead as well as the heater leads, one of the plates may be secured and electrically connected to the cylinder by straps 13. The heater element may be connected to the end plates between strips, Fig. 2 (not shown), or by metal tongues, Fig. 3 (not shown).
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB597681A true GB597681A (en) | 1948-01-30 |
Family
ID=1738651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2478845A Expired GB597681A (en) | 1945-09-25 | Improvements relating to indirectly heated thermionic cathodes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB597681A (en) |
-
1945
- 1945-09-25 GB GB2478845A patent/GB597681A/en not_active Expired
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