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GB1083833A - Cathode - Google Patents

Cathode

Info

Publication number
GB1083833A
GB1083833A GB24261/65A GB2426165A GB1083833A GB 1083833 A GB1083833 A GB 1083833A GB 24261/65 A GB24261/65 A GB 24261/65A GB 2426165 A GB2426165 A GB 2426165A GB 1083833 A GB1083833 A GB 1083833A
Authority
GB
United Kingdom
Prior art keywords
region
rings
barium
impregnated
june
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
Application number
GB24261/65A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Litton Industries Inc
Original Assignee
Litton Industries Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Litton Industries Inc filed Critical Litton Industries Inc
Publication of GB1083833A publication Critical patent/GB1083833A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Solid Thermionic Cathode (AREA)
  • Microwave Tubes (AREA)

Abstract

1,083,833. Cathodes. LITTON INDUSTRIES Inc. June 8, 1965 [June 5, 1964], No. 24261/65. Heading H1D. A magnetron cathode includes a major surface region 40 comprising a refractory metal matrix having an alkaline earth compound dispersed therein, and which is secondary emissive but has a low rate of evaporation of free alkaline earth metal, and one or more minor surface 41, 42 providing a major source of primary electrons, to aid starting. The region 40 may comprise a compacted and sintered mixture of barium carbonate with W and/or Mo, or a porous cylinder of W, Mo or Re impregnated with tungstates or molybdates of barium. The regions 41, 42 may comprise rings of porous W impregnated with BaO.2CaO.2Al 2 O 3 , or rings of Ta, Zr, Ti or Nb which reduce non- emissive compounds from adjacent areas of region 40 to produce free barium. End rings 41, 42 may be replaced by a single ring provided centrally of region 40. Specific examples are given.
GB24261/65A 1964-06-05 1965-06-08 Cathode Expired GB1083833A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US372804A US3297901A (en) 1964-06-05 1964-06-05 Dispenser cathode for use in high power magnetron devices

Publications (1)

Publication Number Publication Date
GB1083833A true GB1083833A (en) 1967-09-20

Family

ID=23469701

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24261/65A Expired GB1083833A (en) 1964-06-05 1965-06-08 Cathode

Country Status (2)

Country Link
US (1) US3297901A (en)
GB (1) GB1083833A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578218A (en) * 1969-03-06 1971-05-11 Harold Thomas Atwood Vacuum seal for dough dividers
GB2190788A (en) * 1986-05-16 1987-11-25 English Electric Valve Co Ltd Cathode
GB2274198A (en) * 1992-12-11 1994-07-13 Litton Systems Inc Cross field amplifier
GB2317741A (en) * 1995-12-12 1998-04-01 Lg Electronics Inc Magnetron cathode
US5874806A (en) * 1996-10-02 1999-02-23 Litton Systems, Inc. Passive jitter reduction in crossed-field amplifier with secondary emission material on anode vanes

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459986A (en) * 1967-01-27 1969-08-05 Otto G Koppius Secondary emission cathode or dynode of a porous matrix of tungsten or molybdenum impregnated with secondary emission material such as a tungstate or an alkali halide of calcium
GB1399260A (en) * 1972-12-21 1975-07-02 English Electric Valve Co Ltd Magnetrons
GB2214704B (en) * 1988-01-20 1992-05-06 English Electric Valve Co Ltd Magnetrons
RU2007777C1 (en) * 1992-04-15 1994-02-15 Предприятие "Плутон" Magnetron
RU2183363C2 (en) 1998-01-08 2002-06-10 Махов Владимир Ильич M-type device
RU2136076C1 (en) 1998-01-08 1999-08-27 Махов Владимир Ильич Magnetron
US6485346B1 (en) 2000-05-26 2002-11-26 Litton Systems, Inc. Field emitter for microwave devices and the method of its production
EP2962322A4 (en) * 2013-03-01 2016-10-26 Soo Yong Park Magnetron
FR3007192B1 (en) * 2013-06-14 2016-12-23 Thales Sa IMPROVED OPTICAL ELECTRONIC CANON

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE515835A (en) * 1951-11-29
US3027489A (en) * 1956-03-29 1962-03-27 Auto Test Inc Timing light circuit
US2957100A (en) * 1957-08-27 1960-10-18 Philips Corp Magnetron cathode structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578218A (en) * 1969-03-06 1971-05-11 Harold Thomas Atwood Vacuum seal for dough dividers
GB2190788A (en) * 1986-05-16 1987-11-25 English Electric Valve Co Ltd Cathode
US4810925A (en) * 1986-05-16 1989-03-07 English Electric Valve Company Limited Directly heated cathodes
GB2190788B (en) * 1986-05-16 1990-07-25 English Electric Valve Co Ltd Directly heated cathodes
GB2274198A (en) * 1992-12-11 1994-07-13 Litton Systems Inc Cross field amplifier
GB2274198B (en) * 1992-12-11 1997-01-08 Litton Systems Inc Cross-field amplifier
GB2317741A (en) * 1995-12-12 1998-04-01 Lg Electronics Inc Magnetron cathode
GB2317741B (en) * 1995-12-12 1999-02-17 Lg Electronics Inc Magnetron
US5874806A (en) * 1996-10-02 1999-02-23 Litton Systems, Inc. Passive jitter reduction in crossed-field amplifier with secondary emission material on anode vanes

Also Published As

Publication number Publication date
US3297901A (en) 1967-01-10

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