GB563623A - Improvements in or relating to cathodes for electron discharge devices - Google Patents
Improvements in or relating to cathodes for electron discharge devicesInfo
- Publication number
- GB563623A GB563623A GB13905/42A GB1390542A GB563623A GB 563623 A GB563623 A GB 563623A GB 13905/42 A GB13905/42 A GB 13905/42A GB 1390542 A GB1390542 A GB 1390542A GB 563623 A GB563623 A GB 563623A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nickel
- core
- per cent
- discharge devices
- electron 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 8
- 229910052759 nickel Inorganic materials 0.000 abstract 4
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 229910017052 cobalt Inorganic materials 0.000 abstract 2
- 239000010941 cobalt Substances 0.000 abstract 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 230000004913 activation Effects 0.000 abstract 1
- 229910052788 barium Inorganic materials 0.000 abstract 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052753 mercury Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical class [O-2].[Sr+2] IATRAKWUXMZMIY-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
- H01J1/14—Solid thermionic cathodes characterised by the material
Landscapes
- Discharge Lamp (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
563,623. Discharge lamps. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 3, 1942, No. 13905. Convention date, Oct. 3, 1941. [Class 39 (i)] [Also in Group II] A cathode, particularly suitable for mercury vapour electron discharge devices, comprises a core of nickel or nickel with up to 50 per cent by weight of cobalt with a coating of an alkaline earth, such as barium oxide or a mixture of barium and strontium oxides, and includes small amounts of two reducing agents so chosen that upon activation an interface will be produced such that said coating will be firmly bonded to the core and undesired cooling of the cathode by heat radiation will be kept low or prevented. The core may consist of 0.05-0.30 per cent silicon, 0.10-0.40 carbon, and the balance substantially pure nickel or nickel with up to 50 per cent cobalt.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US413486A US2306290A (en) | 1941-10-03 | 1941-10-03 | Cathode alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB563623A true GB563623A (en) | 1944-08-23 |
Family
ID=23637405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13905/42A Expired GB563623A (en) | 1941-10-03 | 1942-10-03 | Improvements in or relating to cathodes for electron discharge devices |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2306290A (en) |
| GB (1) | GB563623A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1015939B (en) * | 1951-11-03 | 1957-09-19 | Gen Electric | Cathode for mercury vapor discharge tubes with a base body made of nickel |
| DE974430C (en) * | 1952-10-04 | 1960-12-22 | Telefunken Gmbh | Low-noise, indirectly heated rapid heating cathode for electron tubes |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2778970A (en) * | 1952-06-07 | 1957-01-22 | Rca Corp | Core alloy for indirectly heated cathodes |
| US2691690A (en) * | 1952-08-22 | 1954-10-12 | Driver Harris Co | Thermocouple element composition |
| US2905852A (en) * | 1954-06-15 | 1959-09-22 | Bell Telephone Labor Inc | Electron discharge device |
| US2916652A (en) * | 1955-02-04 | 1959-12-08 | Raytheon Co | Control of electron emission in cathode assemblies |
| US3447015A (en) * | 1967-02-24 | 1969-05-27 | Nasa | Ion thrustor cathode |
-
1941
- 1941-10-03 US US413486A patent/US2306290A/en not_active Expired - Lifetime
-
1942
- 1942-10-03 GB GB13905/42A patent/GB563623A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1015939B (en) * | 1951-11-03 | 1957-09-19 | Gen Electric | Cathode for mercury vapor discharge tubes with a base body made of nickel |
| DE974430C (en) * | 1952-10-04 | 1960-12-22 | Telefunken Gmbh | Low-noise, indirectly heated rapid heating cathode for electron tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| US2306290A (en) | 1942-12-22 |
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