GB658747A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB658747A GB658747A GB30471/47A GB3047147A GB658747A GB 658747 A GB658747 A GB 658747A GB 30471/47 A GB30471/47 A GB 30471/47A GB 3047147 A GB3047147 A GB 3047147A GB 658747 A GB658747 A GB 658747A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- emissive
- reaction mixture
- mixture
- metal
- 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
- 229910052751 metal Inorganic materials 0.000 abstract 3
- 239000002184 metal Substances 0.000 abstract 3
- 239000011541 reaction mixture Substances 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 abstract 2
- 239000002775 capsule Substances 0.000 abstract 2
- 239000002360 explosive Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000011819 refractory material Substances 0.000 abstract 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000003832 thermite Substances 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
- H01J1/22—Heaters
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
658,747. Thermionic valves. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 17, 1947, No. 30471. Convention date, Jan. 11, 1943. [Class 39 (i)] A thermionic valve comprises a cylindrical casing 1, Fig. 1, with a cylindrical re-entrant portion 2 closed at its inner end by a flat metal disc 3 coated with emissive material 4 to serve as a cathode, the anode 5 is supported from the other end of the casing, and a capsule 11, shown in more detail in Fig. 2, containing a heat producing chemical reaction mixture is inserted in the re-entrant portion 2 to heat the cathode to electron emissive temperature. The emissive material may be an alkaline earth metal or alkaline earth oxide. A control grid 8 may be provided, the grid and anode being taken out through vitreous seals 7, 10 in the metal envelope 1. The capsule 11 may be of iron, or the wall 12 may be of refractory material or of metal lined with refractory material and the end part 13 of molybdenum, and the reaction mixture may be " thermite " i.e. a mixture of aluminium powder and ferric oxide. The mixture is ignited by an ignition cap or by a strip of magnesium 15 energized at the appropriate moment by current leads 16, 17 passing through a detachable threaded cap 14. The grid 8 may be maintained negative and only made positive when the reaction mixture is ignited; the grid may however be omitted. U.S.A. Specification 1,965,849 is referred to. The Specification as open to inspection under Sect. 91 states that the discharge device may be used for the ignition of an explosive or demolition charge and may be located within or in proximity to the explosive shell; its emissive period is therefore about a minute or less. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US471929A US2424526A (en) | 1943-01-11 | 1943-01-11 | Electric discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB658747A true GB658747A (en) | 1951-10-10 |
Family
ID=23873548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30471/47A Expired GB658747A (en) | 1943-01-11 | 1947-11-17 | Improvements in and relating to electric discharge devices |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2424526A (en) |
| GB (1) | GB658747A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2932755A (en) * | 1956-01-30 | 1960-04-12 | Applied Radiation Corp | Electron gun and cathode |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3393342A (en) * | 1946-03-14 | 1968-07-16 | Navy Usa | Cathode heater |
| US4107566A (en) * | 1955-02-07 | 1978-08-15 | The United States Of America As Represented By The Secretaru Of The Army | Rugged quick-heating electron tubes |
| US3117249A (en) * | 1960-02-16 | 1964-01-07 | Sperry Rand Corp | Embedded heater cathode |
| CN111243917B (en) * | 2020-01-19 | 2021-12-07 | 中国科学院电子学研究所 | Cathode heater assembly and preparation method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7572C (en) * | 1919-09-03 | |||
| US1673850A (en) * | 1922-05-01 | 1928-06-19 | Arthur Andriessen | Thermionic valve |
| US1927631A (en) * | 1923-08-25 | 1933-09-19 | Robert T Mack | Vacuum tube |
| GB236992A (en) * | 1924-04-12 | 1925-07-13 | Paul Douglas Tyers | Improvements in and relating to electric discharge devices |
| GB244196A (en) * | 1924-09-23 | 1925-12-17 | Sidney Hector | Improvements in thermionic valves |
| US1886705A (en) * | 1926-02-06 | 1932-11-08 | Arsene N Lucian | Indirect electron excitation for thermionic vacuum tubes |
| US1965849A (en) * | 1927-07-29 | 1934-07-10 | Mcllvaine Patent Corp | Electronic tube |
| US2167201A (en) * | 1935-06-28 | 1939-07-25 | Pintsch Julius Kg | Electron tube |
| US2114114A (en) * | 1935-11-05 | 1938-04-12 | Rca Corp | Oscillatory system |
| US2125279A (en) * | 1936-11-13 | 1938-08-02 | Bell Telephone Labor Inc | Electron discharge device |
-
1943
- 1943-01-11 US US471929A patent/US2424526A/en not_active Expired - Lifetime
-
1947
- 1947-11-17 GB GB30471/47A patent/GB658747A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2932755A (en) * | 1956-01-30 | 1960-04-12 | Applied Radiation Corp | Electron gun and cathode |
Also Published As
| Publication number | Publication date |
|---|---|
| US2424526A (en) | 1947-07-22 |
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