GB716412A - Improvements in cylindrical cathodes - Google Patents
Improvements in cylindrical cathodesInfo
- Publication number
- GB716412A GB716412A GB29950/52A GB2995052A GB716412A GB 716412 A GB716412 A GB 716412A GB 29950/52 A GB29950/52 A GB 29950/52A GB 2995052 A GB2995052 A GB 2995052A GB 716412 A GB716412 A GB 716412A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- nov
- rings
- foil
- cylinder
- 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
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
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/04—Cathodes
- H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12479—Porous [e.g., foamed, spongy, cracked, etc.]
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12576—Boride, carbide or nitride component
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
- Y10T428/12611—Oxide-containing component
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/1284—W-base component
Landscapes
- Microwave Tubes (AREA)
- Solid Thermionic Cathode (AREA)
- Powder Metallurgy (AREA)
Abstract
716,412. Thermionic cathode constructions. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Nov. 26, 1952 [Nov. 29, 1951], No. 29950/52. Class 39(1) A cylindrical dispenser cathode suitable for use in a magnetron comprises a molybdenum tube 19 having a central part of reduced diameter, so that when a porous tungsten cylinder 18 is fitted over it, a closed container is formed for the supply of alkaline earth metal compounds 21. Heavy molybderium rings 26, 27 are forced on the ends of tube 19; these are separated from the tube 18 by platinum foil 28, 29 of a relatively low melting- point metal, which is heated while under pressure by rings 26, 27 so that a diffusion weld is formed. An outer coating 30 of various specified materials is provided to increase the secondary emission effect. Alternative materials for the foil and porous cylinder are mentioned.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US258875A US2698913A (en) | 1951-11-29 | 1951-11-29 | Cathode structure |
Publications (1)
Publication Number | Publication Date |
---|---|
GB716412A true GB716412A (en) | 1954-10-06 |
Family
ID=22982500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29950/52A Expired GB716412A (en) | 1951-11-29 | 1952-11-26 | Improvements in cylindrical cathodes |
Country Status (7)
Country | Link |
---|---|
US (1) | US2698913A (en) |
BE (1) | BE515835A (en) |
CH (1) | CH307780A (en) |
DE (1) | DE927584C (en) |
ES (1) | ES206486A1 (en) |
FR (1) | FR1073995A (en) |
GB (1) | GB716412A (en) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1075747B (en) * | 1960-02-18 | Deutsche Elektronik G.m.b.H., Berlin-Wilmersdorf | Cylindrical supply cathode for magnetrons | |
DE974430C (en) * | 1952-10-04 | 1960-12-22 | Telefunken Gmbh | Low-noise, indirectly heated rapid heating cathode for electron tubes |
NL85507C (en) * | 1953-12-22 | |||
US2873217A (en) * | 1954-05-20 | 1959-02-10 | Ets Claude Paz & Silva | Method for manufacturing a hollow electron-emissive electrode |
US2844868A (en) * | 1954-06-01 | 1958-07-29 | Sylvania Electric Prod | Method of joining refractory metals |
NL94233C (en) * | 1954-12-06 | |||
NL210138A (en) * | 1955-04-30 | |||
US2822302A (en) * | 1956-01-16 | 1958-02-04 | Radio Mfg Company Inc | Non-emissive electrode |
US2882587A (en) * | 1956-12-10 | 1959-04-21 | Raytheon Mfg Co | Brazing methods |
US2957100A (en) * | 1957-08-27 | 1960-10-18 | Philips Corp | Magnetron cathode structure |
US3046444A (en) * | 1959-04-28 | 1962-07-24 | Raytheon Co | Magnetrons |
US3113236A (en) * | 1959-06-23 | 1963-12-03 | Philips Corp | Oxide dispenser type cathode |
US3224071A (en) * | 1960-03-14 | 1965-12-21 | Philips Corp | Brazing method for porous bodies |
US3107422A (en) * | 1961-05-16 | 1963-10-22 | Bendix Corp | Rhodium diffusion process for bonding and sealing of metallic parts |
US3132928A (en) * | 1962-02-26 | 1964-05-12 | Donald D Crooks | Simultaneous brazing and corrosion protecting refractory metals |
US3241230A (en) * | 1962-10-12 | 1966-03-22 | Roy I Batista | Diffusion bonding of tungsten to tungsten |
US3297901A (en) * | 1964-06-05 | 1967-01-10 | Litton Industries Inc | Dispenser cathode for use in high power magnetron devices |
US3431631A (en) * | 1964-12-11 | 1969-03-11 | Sylvania Electric Prod | Refractory metal diffusion bonding |
US3410716A (en) * | 1965-04-01 | 1968-11-12 | Trw Inc | Coating of refractory metals with metal modified oxides |
GB1093136A (en) * | 1965-08-27 | 1967-11-29 | Johnson Matthey Co Ltd | Improvements in and relating to the bonding together of metals or alloys |
US3487536A (en) * | 1966-02-24 | 1970-01-06 | Teledyne Inc | Method of forming a high temperature ceramic-to-metal seal |
NL8200903A (en) * | 1982-03-05 | 1983-10-03 | Philips Nv | METHOD FOR DRILLING A SUPPLY CATHOD. |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1267827A (en) * | 1914-11-06 | 1918-05-28 | Gen Electric | Electric discharge device. |
US2121589A (en) * | 1934-06-28 | 1938-06-21 | Westinghouse Electric & Mfg Co | Emissive incandescent cathode |
US2131204A (en) * | 1936-01-15 | 1938-09-27 | Siemens Ag | Indirectly heated thermionic cathode |
US2411601A (en) * | 1941-09-30 | 1946-11-26 | Raytheon Mfg Co | Electronic discharge device |
US2381012A (en) * | 1942-01-03 | 1945-08-07 | Raytheon Mfg Co | Secondary electron discharge device |
US2460119A (en) * | 1944-09-23 | 1949-01-25 | Gen Electric | Magnetron |
NL69486C (en) * | 1947-11-26 |
-
0
- BE BE515835D patent/BE515835A/xx unknown
-
1951
- 1951-11-29 US US258875A patent/US2698913A/en not_active Expired - Lifetime
-
1952
- 1952-11-25 DE DEN6394A patent/DE927584C/en not_active Expired
- 1952-11-26 GB GB29950/52A patent/GB716412A/en not_active Expired
- 1952-11-26 ES ES0206486A patent/ES206486A1/en not_active Expired
- 1952-11-27 FR FR1073995D patent/FR1073995A/en not_active Expired
- 1952-11-27 CH CH307780D patent/CH307780A/en unknown
Also Published As
Publication number | Publication date |
---|---|
US2698913A (en) | 1955-01-04 |
FR1073995A (en) | 1954-09-30 |
DE927584C (en) | 1955-05-12 |
BE515835A (en) | |
CH307780A (en) | 1955-06-15 |
ES206486A1 (en) | 1953-01-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB716412A (en) | Improvements in cylindrical cathodes | |
GB641581A (en) | Improvements in or relating to electric discharge tubes | |
GB675456A (en) | Improvements in or relating to cathodes for electric discharge tubes | |
ES206484A1 (en) | Cathode containing a supply of an electron-emissive material | |
GB495846A (en) | Improvements in and relating to electric discharge devices | |
GB987483A (en) | A cathode for a high-pressure discharge lamp | |
GB481790A (en) | Improvements in or relating to electron discharge devices | |
GB797964A (en) | Improvements in or relating to electric discharge valves | |
GB804697A (en) | Improvements in x-ray tubes | |
GB791495A (en) | Improvements in or relating to cathodes of the dispenser type | |
GB699287A (en) | Improvements in or relating to supply cathodes and discharge tubes comprising such supply cathodes | |
GB495732A (en) | Improvements in or relating to cathode ray tuning indicators | |
GB717034A (en) | Improvements in or relating to the manufacture of porous metal bodies | |
GB582489A (en) | Improvements relating to magnetron electric discharge devices | |
GB603088A (en) | Improvements in electrical discharge tubes | |
GB701871A (en) | Improvements in or relating to cathodes for electric discharge tubes and methods of producing such cathodes | |
GB766881A (en) | Improvements relating to cathodes for high power valves | |
GB757066A (en) | Improvements in or relating to cylindrical dispenser cathodes | |
GB857090A (en) | Improvements in or relating to thermionic dispenser cathodes | |
GB1189940A (en) | Magnetron Cathodes | |
GB1133240A (en) | Improvements in or relating to low pressure mercury-vapour discharge lamps | |
GB731454A (en) | Improvements relating to electron emissive devices | |
GB835418A (en) | Improvements in electronic discharge tubes | |
GB1070377A (en) | Improvements in or relating to thermionic cathodes and to electron discharge devices employing thermionic cathodes | |
GB672610A (en) | Improvements in cathodes for use in electron discharge tubes |