GB756767A - Improvements in or relating to emissive cathodes - Google Patents
Improvements in or relating to emissive cathodesInfo
- Publication number
- GB756767A GB756767A GB9805/54A GB980554A GB756767A GB 756767 A GB756767 A GB 756767A GB 9805/54 A GB9805/54 A GB 9805/54A GB 980554 A GB980554 A GB 980554A GB 756767 A GB756767 A GB 756767A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nickel
- tubes
- base
- wires
- copper
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 12
- 229910052759 nickel Inorganic materials 0.000 abstract 5
- 239000000463 material Substances 0.000 abstract 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 239000004411 aluminium Substances 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 2
- 229910052802 copper Inorganic materials 0.000 abstract 2
- 239000010949 copper Substances 0.000 abstract 2
- 229910052715 tantalum Inorganic materials 0.000 abstract 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 2
- 229910000570 Cupronickel Inorganic materials 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 238000005219 brazing Methods 0.000 abstract 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- GNLCAVBZUNZENF-UHFFFAOYSA-N platinum silver Chemical compound [Ag].[Ag].[Ag].[Pt] GNLCAVBZUNZENF-UHFFFAOYSA-N 0.000 abstract 1
- 235000011121 sodium hydroxide Nutrition 0.000 abstract 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 abstract 1
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
Abstract
756,767. Thermionic cathode constructions. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. April 2, 1954 [April 2, 1953], No. 9805/54. Class 39 (1). A plurality of identical metal tubes 1 the lengths of which are at least equal to their diameters are arranged contiguously with their ends in one plane, and the tubes are filled with electron-emitting oxide so that the ends form a plane emissive surface. As shown, nickel tubes of 0.01 mm. in wall thickness and 0.5 mm. upwards in height may be ordered by a magnetic sorter, Fig. 4 (not shown), and secured within a box 2 of nickel or molybdenum by simple heating to 1050 C., by nickel powder paste applied to base 4, or by brazing with copper, platinumsilver or copper-nickel alloy. The heater 5 is assembled behind the base 4. After filling with alkaline-earth carbonates with, if desired, a top layer overall of depth 10Á, the material is activated at 1100 C. falling to 850-900 C. Nickel powder may be added to the emissive material. A store of emissive material may be interposed between the base 4 and the lower ends of the tubes, the spaces between the tubes 1 being filled by wires 9, Fig. 6a, to improve capillary action in use. In a modification a honeycomb structure 1, Fig. 7, is made by mounting a number of nickel-coated aluminium wires within a nickel tube 2, swaging the tube to press the wires together, cutting into sections, and dissolving out the aluminium with caustic soda; or tantalum-coated nickel or iron wires may be treated with hydrochloric acid. The emissive material may be thoria activated at 1600-1800 C. and a reserve 7, Fig. 9, may be left between the base 4 and the honeycomb structure 1. Two cylindrical heat shields of tantalum or copper may surround the whole cathode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1039140X | 1953-04-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB756767A true GB756767A (en) | 1956-09-12 |
Family
ID=9588108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9805/54A Expired GB756767A (en) | 1953-04-02 | 1954-04-02 | Improvements in or relating to emissive cathodes |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2786957A (en) |
| DE (1) | DE1039140B (en) |
| FR (1) | FR1078606A (en) |
| GB (1) | GB756767A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2939990A (en) * | 1956-05-21 | 1960-06-07 | Int Standard Electric Corp | Oxide cathode for amplifier tubes |
| US3070719A (en) * | 1957-07-24 | 1962-12-25 | Varian Associates | Cathodes for magnentically-confined glow discharge apparatus |
| US3025428A (en) * | 1959-10-15 | 1962-03-13 | Kuthe Lab Inc | Cathode structure |
| DE1283402B (en) * | 1966-03-29 | 1968-11-21 | Siemens Ag | Indirectly heated storage cathode for electrical discharge vessels |
| DE3233584A1 (en) * | 1982-09-10 | 1984-03-15 | G. Rau GmbH & Co, 7530 Pforzheim | ELECTRODE FOR AN ELECTRICAL DISCHARGE LINE AND PRODUCTION METHOD THEREFOR |
| JPS59501887A (en) * | 1982-10-12 | 1984-11-08 | ヒユ−ズ・エアクラフト・カンパニ− | Controlled porosity dispenser cathode |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB207514A (en) * | 1923-10-29 | 1924-05-01 | Western Electric Co Ltd | Improvements in electron discharge devices |
| NL24196C (en) * | 1928-04-10 | |||
| DE663197C (en) * | 1930-12-31 | 1938-08-01 | Patra Patent Treuhand | Electric light tube with discharge through the positive column and with compact, cold metal electrodes |
| GB437967A (en) * | 1934-05-11 | 1935-11-08 | Gen Electric Co Ltd | Improvements in thermionic cathodes |
| GB495916A (en) * | 1936-12-22 | 1938-11-22 | Zeiss Ikon Ag | Improvement in or relating to thermionic cathodes |
| US2452075A (en) * | 1941-12-18 | 1948-10-26 | Raytheon Mfg Co | Velocity modulation electron discharge tube |
| BE451865A (en) * | 1942-08-13 | |||
| US2459841A (en) * | 1943-06-08 | 1949-01-25 | Glenn F Rouse | Cathode |
| FR945839A (en) * | 1947-04-18 | 1949-05-16 | Radioelectriques Lab | Further development of vacuum tube cathodes |
| BE486753A (en) * | 1948-01-15 | |||
| US2624024A (en) * | 1949-10-26 | 1952-12-30 | Hartford Nat Bank & Trust Co | Cathode for use in electron discharge tubes |
-
1953
- 1953-04-02 FR FR1078606D patent/FR1078606A/en not_active Expired
-
1954
- 1954-04-01 DE DEC9127A patent/DE1039140B/en active Pending
- 1954-04-01 US US420377A patent/US2786957A/en not_active Expired - Lifetime
- 1954-04-02 GB GB9805/54A patent/GB756767A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1078606A (en) | 1954-11-19 |
| US2786957A (en) | 1957-03-26 |
| DE1039140B (en) | 1958-09-18 |
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