GB223562A - Improvements relating to electron discharge devices - Google Patents
Improvements relating to electron discharge devicesInfo
- Publication number
- GB223562A GB223562A GB24251/24A GB2425124A GB223562A GB 223562 A GB223562 A GB 223562A GB 24251/24 A GB24251/24 A GB 24251/24A GB 2425124 A GB2425124 A GB 2425124A GB 223562 A GB223562 A GB 223562A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- cathode
- temperature
- current
- chamber
- 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
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000005995 Aluminium silicate Substances 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 1
- 235000012211 aluminium silicate Nutrition 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
- 239000007789 gas Substances 0.000 abstract 1
- 239000001307 helium Substances 0.000 abstract 1
- 229910052734 helium Inorganic materials 0.000 abstract 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 abstract 1
- 239000006233 lamp black Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000010445 mica Substances 0.000 abstract 1
- 229910052618 mica group Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 abstract 1
- 229910010271 silicon carbide Inorganic materials 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
- 229910052712 strontium Inorganic materials 0.000 abstract 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/04—Electrodes; Screens
- H01J17/06—Cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
- H01J21/04—Tubes with a single discharge path without control means, i.e. diodes
Landscapes
- Discharge Lamp (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
223,562. Metropolitan-Vickers Electrical Co., Ltd., (Assignees of Slepian, J.). Oct. 15, 1923, [Convention date]. Discharge-producing apparatus. - A thermionic device, which mav be used for rectifying alternating currents, comprises electrodes 2, 4 placed less than the tenth of a millimetre apart, the surface of one of the electrodes being made of a material which becomes thermionically active at a lower temperature than the surface of the other, and means are provided for heating the electrodes together to such a temperature that one becomes active while the other remains inactive. The cathode 2 may be made of a mixture of kaolin, carborundum and lampblack, which is moulded into slabs and baked at a high temperature. The anode may be made of similar material, or both electrodes may be made of metal, such as nichel. The active surface 5 of the cathode is coated with oxides, such as those of barium and strontium, which emit electrons at a relatively low temperature, or these oxides may be incorporated in the cathode during the process of manufacture. The electrodes are placed in a chamber 6 having walls 7 of refractory material, the chamber being preferably filled with a gas, such as hydrogen, helium or nitrogen, at approximately atmospheric pressure. Contact-members 9, in intimate contact with the back surfaces of the electrodes, are connected through a transformer 11 to the source of current to be rectified. A heating coil 14, mounted inside the chamber 6, may be connected to the alternating-current source through a switch 15. By means of this coil the electrodes are maintained at a temperature of from 700 to 800 C., at which the cathode emits electrons freely and permits the passage of current from the anode. The electrodes may be separated by mica spacers 3, or they may be placed in apparent contact, actual contact only occurring at a few points of the surface, where the high specific resistance of the electrodes prevents the direct passage of current. A number of pairs of electrodes may be assembled in a single casing and connected in parallel to the terminals of the rectifier. Specification 195,691, [Class 39 (i), Electric lamps, Arc &c.], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US668553A US1839899A (en) | 1923-10-15 | 1923-10-15 | Space current device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB223562A true GB223562A (en) | 1925-10-01 |
Family
ID=24682789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24251/24A Expired GB223562A (en) | 1923-10-15 | 1924-10-13 | Improvements relating to electron discharge devices |
Country Status (4)
Country | Link |
---|---|
US (1) | US1839899A (en) |
DE (1) | DE501404C (en) |
FR (1) | FR587307A (en) |
GB (1) | GB223562A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2462441A (en) * | 1947-02-12 | 1949-02-22 | John A Victoreen | Vacuum tube with filamentary cathode |
US2631191A (en) * | 1948-11-26 | 1953-03-10 | Int Standard Electric Corp | Electric rectifier of the contact type |
US2643332A (en) * | 1949-03-29 | 1953-06-23 | Hartford Nat Bank & Trust Co | High-frequency electron discharge tube system |
US2601024A (en) * | 1949-07-26 | 1952-06-17 | Sylvania Electric Prod | Electrode structure for electron discharge devices |
US2631246A (en) * | 1950-02-28 | 1953-03-10 | Rca Corp | Radiation detection |
US2747127A (en) * | 1952-03-10 | 1956-05-22 | Hartford Nat Bank & Trust Co | Contact diode |
US2894167A (en) * | 1953-03-30 | 1959-07-07 | Itt | Electron discharge device |
NL98662C (en) * | 1953-07-18 | 1961-07-17 | ||
US2905852A (en) * | 1954-06-15 | 1959-09-22 | Bell Telephone Labor Inc | Electron discharge device |
US3050651A (en) * | 1956-09-04 | 1962-08-21 | Gen Electric | High temperature electron discharge device and apparatus |
-
1923
- 1923-10-15 US US668553A patent/US1839899A/en not_active Expired - Lifetime
-
1924
- 1924-09-30 FR FR587307D patent/FR587307A/en not_active Expired
- 1924-10-10 DE DEW67294D patent/DE501404C/en not_active Expired
- 1924-10-13 GB GB24251/24A patent/GB223562A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1839899A (en) | 1932-01-05 |
DE501404C (en) | 1930-07-12 |
FR587307A (en) | 1925-04-16 |
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