[go: up one dir, main page]

GB1399260A - Magnetrons - Google Patents

Magnetrons

Info

Publication number
GB1399260A
GB1399260A GB5913672A GB5913672A GB1399260A GB 1399260 A GB1399260 A GB 1399260A GB 5913672 A GB5913672 A GB 5913672A GB 5913672 A GB5913672 A GB 5913672A GB 1399260 A GB1399260 A GB 1399260A
Authority
GB
United Kingdom
Prior art keywords
cathode
hat
magnetron
heated
electron
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
GB5913672A
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.)
Teledyne UK Ltd
Original Assignee
English Electric Valve Co Ltd
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 English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Priority to GB5913672A priority Critical patent/GB1399260A/en
Priority to CA187,967A priority patent/CA1003964A/en
Priority to US424358A priority patent/US3899714A/en
Priority to NL7317243A priority patent/NL7317243A/xx
Priority to FR7345672A priority patent/FR2211746A1/fr
Priority to JP48143370A priority patent/JPS4998168A/ja
Publication of GB1399260A publication Critical patent/GB1399260A/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

  • Microwave Tubes (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

1399260 Magnetrons ENGLISH ELECTRIC VALVE CO Ltd 19 Nov 1973 [21 Dec 1972] 59136/72 Heading H1D The cathode structure of a quick-starting magnetron includes a first thermally emissive cathode of low heat inertia, and a second cathode member of relatively high heat inertia which is positioned between the first cathode and the anode, is provided with a continuous circumferential aperture to allow electrons to pass therethrough from the first cathode, and which partially screens the first cathode from electron bombardment during normal running of the magnetron, to prevent its temperature rising to an unacceptably high value. As described, in a magnetron having anode vanes V, the first cathode is formed by thermionically emissive material 1 on the surface of a thin-walled metal tube 2, which is secured at its ends to a cathode support 11 and on endhat 8, and is directly heated by current passed through the tube from support 11 to a central axial metal rod 10 secured to the end-hat 8. Coaxially surrounding cathode 1 is the main cathode and electron screen, formed by the two, similar, spaced, thick-walled tube portions 3 and 4 coated with secondary emissive or thermionically emissive material 5, 6, and supported from end-hat 8 and a second end-hat 9, respectively. The main cathode may be heated only by electron impact during operation, or may be separately heated.
GB5913672A 1972-12-21 1972-12-21 Magnetrons Expired GB1399260A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB5913672A GB1399260A (en) 1972-12-21 1972-12-21 Magnetrons
CA187,967A CA1003964A (en) 1972-12-21 1973-12-12 Magnetron cathode
US424358A US3899714A (en) 1972-12-21 1973-12-13 Quick starting magnetron with shielded cathode
NL7317243A NL7317243A (en) 1972-12-21 1973-12-17
FR7345672A FR2211746A1 (en) 1972-12-21 1973-12-20
JP48143370A JPS4998168A (en) 1972-12-21 1973-12-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5913672A GB1399260A (en) 1972-12-21 1972-12-21 Magnetrons

Publications (1)

Publication Number Publication Date
GB1399260A true GB1399260A (en) 1975-07-02

Family

ID=10483125

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5913672A Expired GB1399260A (en) 1972-12-21 1972-12-21 Magnetrons

Country Status (6)

Country Link
US (1) US3899714A (en)
JP (1) JPS4998168A (en)
CA (1) CA1003964A (en)
FR (1) FR2211746A1 (en)
GB (1) GB1399260A (en)
NL (1) NL7317243A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2317741A (en) * 1995-12-12 1998-04-01 Lg Electronics Inc Magnetron cathode

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242067A (en) * 1975-09-29 1977-04-01 New Japan Radio Co Ltd Magnetron cathode construction
US5280218A (en) * 1991-09-24 1994-01-18 Raytheon Company Electrodes with primary and secondary emitters for use in cross-field tubes
US5327094A (en) * 1992-12-11 1994-07-05 Litton Systems, Inc. Jitter suppression in crossed-field amplifier by use of field emitter
US5412281A (en) * 1993-03-31 1995-05-02 Litton Systems, Inc. Phase smoothing cathode for reduced noise crossed-field amplifier
JP3803432B2 (en) * 1995-10-30 2006-08-02 セイコーエプソン株式会社 Lamp unit and image reading apparatus using the same
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
US5977714A (en) * 1997-04-16 1999-11-02 Adamovski; Victor Isaevich Magnetron anodes having refractory material and cooled by fluid boiling
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
RU2150765C1 (en) * 1999-04-07 2000-06-10 Санкт-Петербургский государственный технический университет Method and device for producing broad-band, high- power, superhigh-frequency quasi-noise signals
US6485346B1 (en) 2000-05-26 2002-11-26 Litton Systems, Inc. Field emitter for microwave devices and the method of its production
JP4355135B2 (en) * 2002-11-13 2009-10-28 新日本無線株式会社 Pulse magnetron

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2736838A (en) * 1951-04-03 1956-02-28 Richard B Nelson Starting apparatus for a cold cathode electron discharge device
US2822499A (en) * 1955-02-17 1958-02-04 Bell Telephone Labor Inc Cathodes for electron discharge devices
US2818528A (en) * 1956-09-17 1957-12-31 Bell Telephone Labor Inc Electron discharge device
US3297901A (en) * 1964-06-05 1967-01-10 Litton Industries Inc Dispenser cathode for use in high power magnetron devices
NL130735C (en) * 1965-08-16 1900-01-01
DE1541026B2 (en) * 1966-12-14 1971-08-19 Philips Patentverwaltung Gmbh, 2000 Hamburg CIRCULAR CYLINDER CATHOD FOR A MAGNETIC TUBE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
JPS4998168A (en) 1974-09-17
NL7317243A (en) 1974-06-25
US3899714A (en) 1975-08-12
FR2211746A1 (en) 1974-07-19
CA1003964A (en) 1977-01-18

Similar Documents

Publication Publication Date Title
US3679927A (en) High power x-ray tube
GB1399260A (en) Magnetrons
US3751701A (en) Convergent flow hollow beam x-ray gun with high average power
US2411601A (en) Electronic discharge device
GB1000832A (en) Low temperature thermionic energy converter
US2218386A (en) Discharge device
US1893887A (en) Electron tube
GB923183A (en) Improvements in and relating to indirectly-heated cathodes
GB1357469A (en) Electron-beam generators for transit-time electron discharge tubes
GB1502876A (en) Cathode ray tube
US4218633A (en) Hydrogen hollow cathode ion source
US2151766A (en) Magnetron
US2508114A (en) Tantalum electrode for electric discharge devices
US1924319A (en) Cathode structure for thermionic devices
US2407607A (en) Electron discharge device employing hollow resonator
US2206710A (en) Pool-type X-ray tube
US4634925A (en) Electron gun for a high power klystron
US2065997A (en) Gaseous discharge tube cathode
US2117054A (en) Luminescent tube
US2963608A (en) Cathode ray tube structure
US2381632A (en) Electron discharge device
US2459997A (en) Partially indirectly heated cathode structure for gas tubes
US3892989A (en) Convergent flow hollow beam X-ray gun construction
US2101610A (en) Electric discharge tube
US2541335A (en) Glow discharge device

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee