GB520751A - Improvements in or relating to electron discharge devices - Google Patents
Improvements in or relating to electron discharge devicesInfo
- Publication number
- GB520751A GB520751A GB31427/38A GB3142738A GB520751A GB 520751 A GB520751 A GB 520751A GB 31427/38 A GB31427/38 A GB 31427/38A GB 3142738 A GB3142738 A GB 3142738A GB 520751 A GB520751 A GB 520751A
- Authority
- GB
- United Kingdom
- Prior art keywords
- metal
- barium
- vapour
- filament
- compound
- 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
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 6
- 229910052751 metal Inorganic materials 0.000 abstract 5
- 239000002184 metal Substances 0.000 abstract 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 4
- 229910052788 barium Inorganic materials 0.000 abstract 4
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract 4
- 239000003513 alkali Substances 0.000 abstract 3
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 3
- 229910052792 caesium Inorganic materials 0.000 abstract 3
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 3
- 239000003638 chemical reducing agent Substances 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229910052759 nickel Inorganic materials 0.000 abstract 2
- 150000002927 oxygen compounds Chemical class 0.000 abstract 2
- NEDFZELJKGZAQF-UHFFFAOYSA-J strontium;barium(2+);dicarbonate Chemical compound [Sr+2].[Ba+2].[O-]C([O-])=O.[O-]C([O-])=O NEDFZELJKGZAQF-UHFFFAOYSA-J 0.000 abstract 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 abstract 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 239000000020 Nitrocellulose Substances 0.000 abstract 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 abstract 1
- 150000001339 alkali metal compounds Chemical class 0.000 abstract 1
- -1 caesium permanganate Chemical class 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 abstract 1
- WYACBZDAHNBPPB-UHFFFAOYSA-N diethyl oxalate Chemical compound CCOC(=O)C(=O)OCC WYACBZDAHNBPPB-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 238000005247 gettering Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- 229920001220 nitrocellulos Polymers 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
- 230000008016 vaporization Effects 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
- H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
- H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
- H01J7/186—Getter supports
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S252/00—Compositions
- Y10S252/95—Doping agent source material
Landscapes
- Discharge Lamp (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
520,751. Obtaining high vacua. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 31, 1938, No. 31427. Convention date, Oct. 30, 1937. [Class 8(i)] [Also in Group XL] A method of liberating within the envelope of an electron discharge device an alkali or alkaline earth metal for gettering comprises heating a stable compound of the metal and vaporizing a reducing agent in the presence of the compound to reduce it and liberate the metal. The form of getter unit shown in Fig. 2 consists of a box of sheet nickel roughened on the inside and having its flanges spot welded together. The unit is mounted in the envelope of a device so that vapour escaping from the hole 7 is directed into the annular space round the pinch. The box is coated internally with a stable oxygen compound of the alkali or alkaline earth metal, such as caesium bichromate or permanganate mixed as a powder with nitrocellulose, diatol and diethyl oxalate. A coiled filament 8 of tantalum, tungsten, zirconium or molybdenum, is coated with the reducing agent or with a compound decomposable by heat, such as barium or bariumstrontium carbonate or barium beryllonate, and is connected at one end to the box and at the other end, passing through the hole 7, to one of the leads of the device. In using the device in making a photo-electric cell, after the cell is mechanically exhausted, the filament is heated to warm the box and evolve reducing vapour from the filament coating, which, if barium vapour, getters residual gases in the envelope. The amount of metal liberated is determined by controlling the heat of the filament. In an alternative construction a cylindrical housing 11, Fig. 3, enclosing a perforated metal ring 12 is pinched over one end of the filament 8 which makes a closed circuit with a supporting loop, so that it may be heated inductively. The ring, which may be of iron or other ferrous metal to assist in the reduction, is dipped in a solution of the alkali metal compound. An oxygen compound of an alkali or alkaline earth metal, such as caesium permanganate, may be produced on the nickel or iron plates may be reduced and caesium vapour liberated by heating the plate to 600‹C. and projecting on the coated surface barium or other alkaline earth vapour from a heated tantalum wire covered with a barium-strontium carbonate as described in Specification 494,150.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US171814A US2154131A (en) | 1937-10-30 | 1937-10-30 | Getter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB520751A true GB520751A (en) | 1940-05-02 |
Family
ID=22625234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31427/38A Expired GB520751A (en) | 1937-10-30 | 1938-10-31 | Improvements in or relating to electron discharge devices |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2154131A (en) |
| GB (1) | GB520751A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2433962A (en) * | 1943-03-24 | 1948-01-06 | United Electronics Company | Getter structure for electron discharge tubes |
| US2426247A (en) * | 1943-03-24 | 1947-08-26 | United Electronies Company | Getter apparatus |
| US2437097A (en) * | 1945-01-05 | 1948-03-02 | King Lab Inc | Getter structure |
| US3022361A (en) * | 1956-10-24 | 1962-02-20 | Minnesota Mining & Mfg | Electrical device |
| US3096211A (en) * | 1959-03-31 | 1963-07-02 | Emi Ltd | Alkali metal generators |
| US3663121A (en) * | 1969-05-24 | 1972-05-16 | Getters Spa | Generation of metal vapors |
| DE2034633C3 (en) * | 1969-07-24 | 1979-10-25 | S.A.E.S. Getters S.P.A., Mailand (Italien) | Cartridge for a getter pump |
| NL7907220A (en) * | 1979-09-28 | 1981-03-31 | Philips Nv | LOW PRESSURE METAL VAPOR DISCHARGE LAMP. |
| US12002597B2 (en) | 2020-08-31 | 2024-06-04 | Quantinuum Llc | Low temperature low-abundance atomic object dispenser |
-
1937
- 1937-10-30 US US171814A patent/US2154131A/en not_active Expired - Lifetime
-
1938
- 1938-10-31 GB GB31427/38A patent/GB520751A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2154131A (en) | 1939-04-11 |
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