GB216840A - - Google Patents
Info
- Publication number
- GB216840A GB216840A GB7978/24A GB797824A GB216840A GB 216840 A GB216840 A GB 216840A GB 7978/24 A GB7978/24 A GB 7978/24A GB 797824 A GB797824 A GB 797824A GB 216840 A GB216840 A GB 216840A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hafnium
- wire
- added
- metal
- thorium
- 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
- 229910052735 hafnium Inorganic materials 0.000 abstract 3
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 abstract 1
- 229910052776 Thorium Inorganic materials 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 229910052700 potassium Inorganic materials 0.000 abstract 1
- 239000011591 potassium Substances 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 1
- 150000002910 rare earth metals Chemical class 0.000 abstract 1
- 229910052706 scandium Inorganic materials 0.000 abstract 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 239000010936 titanium Substances 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
- 229910052727 yttrium Inorganic materials 0.000 abstract 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 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
- 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
Abstract
216,840. Telefunken Ges. f³r Drahtlose Telegraphie. May 30, 1923, [Convention date]. Vacuum tubes.-A thermionic cathode is formed of a wire or filament of metal of high melting point such as tungsten or tantalum to which hafnium or a compound thereof has been added. Hafnium is preferably added to the metal before drawing; oxidation of the wire &c. may be reduced by carbon, potassium, sodium or magnesium. Small quantities of electron emitting substances may be added, such as alkaline earths and rare earth metals, yttrium, scandium, thorium, zirconium, titanium, or compounds thereof. The Specification as open to inspection under Sect. 91 (3) (a) comprises also coating hafnium on the wire at red heat. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE216840T | 1923-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB216840A true GB216840A (en) | 1925-06-29 |
Family
ID=31893367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7978/24A Expired GB216840A (en) | 1923-05-30 | 1924-03-28 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1843244A (en) |
| GB (1) | GB216840A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3116145A (en) * | 1962-04-30 | 1963-12-31 | American Metal Climax Inc | Tungsten-hafnium alloy casting |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2695945A (en) * | 1952-11-04 | 1954-11-30 | Union Carbide & Carbon Corp | Refractory metal electrode for inert gas-shielded arc welding |
| US2744183A (en) * | 1952-11-13 | 1956-05-01 | Union Carbide & Carbon Corp | Inert gas-shielded arc welding |
-
1924
- 1924-02-26 US US695383A patent/US1843244A/en not_active Expired - Lifetime
- 1924-03-28 GB GB7978/24A patent/GB216840A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3116145A (en) * | 1962-04-30 | 1963-12-31 | American Metal Climax Inc | Tungsten-hafnium alloy casting |
Also Published As
| Publication number | Publication date |
|---|---|
| US1843244A (en) | 1932-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2566115A (en) | Alloy for cathode element | |
| GB216840A (en) | ||
| GB491287A (en) | Improvements in secondary electron emitting electrodes suitable for electron discharge devices | |
| GB613946A (en) | Improvements in or relating to thermionic tubes having a secondary-emission electrode | |
| GB488688A (en) | Improvements in or relating to secondary electron emitting electrodes | |
| GB539897A (en) | Improvements in or relating to electron discharge devices | |
| US2241565A (en) | Grid electrode | |
| DE659437C (en) | Process for the manufacture of oxide cathodes | |
| GB207514A (en) | Improvements in electron discharge devices | |
| GB526731A (en) | Improvements in secondary emissive electrodes | |
| GB274507A (en) | High emission thermionic valve | |
| GB516620A (en) | Improvements in cathode ray tubes | |
| GB248956A (en) | Improvements in or relating to cathodes for electric discharge devices | |
| GB521818A (en) | Improvements in or relating to vacuum tubes | |
| GB407373A (en) | Method of producing electric discharge tubes | |
| GB459163A (en) | Improvements in and relating to electric discharge tubes | |
| US1747061A (en) | Electrode composition for electron-discharge devices | |
| GB516455A (en) | Improvements relating to cathode ray tubes | |
| GB277997A (en) | ||
| DE449447C (en) | Glow cathode for electric discharge tubes | |
| GB416616A (en) | Improvements in electric discharge tubes | |
| GB281262A (en) | Improvements in or relating to electron emitting cathodes | |
| GB272249A (en) | Improvements in or relating to thermionic valves | |
| GB367336A (en) | Process for the manufacture of hot cathodes for electric discharge tubes | |
| GB471501A (en) | Improvements in and relating to electron discharge devices |