GB758100A - Improvements in or relating to thermionic cathodes - Google Patents
Improvements in or relating to thermionic cathodesInfo
- Publication number
- GB758100A GB758100A GB3144053A GB3144053A GB758100A GB 758100 A GB758100 A GB 758100A GB 3144053 A GB3144053 A GB 3144053A GB 3144053 A GB3144053 A GB 3144053A GB 758100 A GB758100 A GB 758100A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- container
- platinum
- nov
- molybdenum
- 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
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
758,100. Cathode constructions and materials. GENERAL ELECTRIC CO., Ltd., and BRODIE, I. Nov. 4, 1954 [Nov. 12, 1953], No. 31440/53. Class 39 (1). In a supply cathode, the container 1, usually of molybdenum, has an internal coating 2 of a refractory material which will not react with the alkaline earth compounds during manufacture. Such a coating may be platinum, iridium, or rhodium. A layer of a platinum resinate solution may be brushed on, and then heated. The edges of the closure disc 7 and container 1 are bevelled, and may be filed to ensure good thermal contact, before welding together in an atmosphere of " forming gas " ; the temperature of the molybdenum container is preferably kept below 1000‹ C. to prevent its alloying with the platinum. The cathode may be used in a cathode-ray tube.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3144053A GB758100A (en) | 1953-11-12 | 1953-11-12 | Improvements in or relating to thermionic cathodes |
| FR1111931D FR1111931A (en) | 1953-11-12 | 1954-11-09 | Thermionic cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3144053A GB758100A (en) | 1953-11-12 | 1953-11-12 | Improvements in or relating to thermionic cathodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB758100A true GB758100A (en) | 1956-09-26 |
Family
ID=10323122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3144053A Expired GB758100A (en) | 1953-11-12 | 1953-11-12 | Improvements in or relating to thermionic cathodes |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1111931A (en) |
| GB (1) | GB758100A (en) |
-
1953
- 1953-11-12 GB GB3144053A patent/GB758100A/en not_active Expired
-
1954
- 1954-11-09 FR FR1111931D patent/FR1111931A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1111931A (en) | 1956-03-06 |
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