GB1141495A - Improvements in or relating to magnetrons - Google Patents

Improvements in or relating to magnetrons

Info

Publication number
GB1141495A
GB1141495A GB34961/65A GB3496165A GB1141495A GB 1141495 A GB1141495 A GB 1141495A GB 34961/65 A GB34961/65 A GB 34961/65A GB 3496165 A GB3496165 A GB 3496165A GB 1141495 A GB1141495 A GB 1141495A
Authority
GB
United Kingdom
Prior art keywords
filament
magnetrons
secondary emissive
relating
groove
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
GB34961/65A
Inventor
Francis James Weaver
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
Priority to NL130735D priority Critical patent/NL130735C/xx
Application filed by English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Priority to GB34961/65A priority patent/GB1141495A/en
Priority to US556663A priority patent/US3403281A/en
Priority to NL6609353A priority patent/NL6609353A/xx
Priority to CH1024966A priority patent/CH437542A/en
Priority to DE19661541003 priority patent/DE1541003B1/en
Priority to SE11016/66A priority patent/SE325082B/xx
Priority to FR73168A priority patent/FR1514978A/en
Publication of GB1141495A publication Critical patent/GB1141495A/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

Abstract

1,141,495. Magnetrons. ENGLISH ELECTRIC VALVE CO. Ltd. 3 May, 1966 [16 Aug., 1965], No. 34961/65. Heading H1D. In a magnetron the cathode comprises a directly heated cathode filament 1 supported in a helical groove 2 in a cylindrical secondary emissive body 3, the filament being used for initiating the discharge and then switched off. The filament 1 may be insulated from the body 3 by threaded beads or by providing the walls of the groove 2 with a layer of insulation, e.g. alumina. The secondary emissive body 3 may comprise a beryllium-copper alloy having an oxidized surface.
GB34961/65A 1965-08-16 1965-08-16 Improvements in or relating to magnetrons Expired GB1141495A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL130735D NL130735C (en) 1965-08-16
GB34961/65A GB1141495A (en) 1965-08-16 1965-08-16 Improvements in or relating to magnetrons
US556663A US3403281A (en) 1965-08-16 1966-06-10 Magnetron having rapid starting property when cold
NL6609353A NL6609353A (en) 1965-08-16 1966-07-05
CH1024966A CH437542A (en) 1965-08-16 1966-07-14 Magnetron
DE19661541003 DE1541003B1 (en) 1965-08-16 1966-08-13 MAGNETRON
SE11016/66A SE325082B (en) 1965-08-16 1966-08-15
FR73168A FR1514978A (en) 1965-08-16 1966-08-16 High power, fast start magnetrons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34961/65A GB1141495A (en) 1965-08-16 1965-08-16 Improvements in or relating to magnetrons

Publications (1)

Publication Number Publication Date
GB1141495A true GB1141495A (en) 1969-01-29

Family

ID=10372145

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34961/65A Expired GB1141495A (en) 1965-08-16 1965-08-16 Improvements in or relating to magnetrons

Country Status (7)

Country Link
US (1) US3403281A (en)
CH (1) CH437542A (en)
DE (1) DE1541003B1 (en)
FR (1) FR1514978A (en)
GB (1) GB1141495A (en)
NL (2) NL6609353A (en)
SE (1) SE325082B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133614A (en) * 1983-01-18 1984-07-25 Varian Associates Coaxial magnetron with improved starting
GB2214704A (en) * 1988-01-20 1989-09-06 English Electric Valve Co Ltd Magnetron cathode assembly
GB2231198A (en) * 1989-03-31 1990-11-07 Litton Systems Inc Enhanced secondary electron emitter.
WO1995026039A1 (en) * 1994-03-22 1995-09-28 Vladimir Iliich Makhov Magnetron

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1399260A (en) * 1972-12-21 1975-07-02 English Electric Valve Co Ltd Magnetrons
JPS5413155B2 (en) * 1973-03-16 1979-05-29
US3896332A (en) * 1973-06-04 1975-07-22 M O Valve Co Ltd High power quick starting magnetron
US4687964A (en) * 1985-05-09 1987-08-18 The United States Of America As Represented By The Administrator National Aeronautics & Space Administration Apparatus for mounting a field emission cathode
US5130601A (en) * 1990-03-14 1992-07-14 Litton Systems, Inc. Quick warm-up cathode heater for high average power magnetrons
US6686696B2 (en) * 2001-03-08 2004-02-03 Genvac Aerospace Corporation Magnetron with diamond coated cathode

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2097302A (en) * 1935-11-09 1937-10-26 Telefunken Gmbh Cathode for discharge devices
DE940181C (en) * 1953-10-24 1956-03-15 Elektronik G M B H Deutsche Indirectly heated high-performance cathode with thick-walled metallic cathode support and process for its manufacture
US2818528A (en) * 1956-09-17 1957-12-31 Bell Telephone Labor Inc Electron discharge device
US2928987A (en) * 1958-04-01 1960-03-15 Gen Electric Magnetron device and system
US2967264A (en) * 1959-01-29 1961-01-03 Raytheon Co Grid controlled magnetrons

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133614A (en) * 1983-01-18 1984-07-25 Varian Associates Coaxial magnetron with improved starting
GB2214704A (en) * 1988-01-20 1989-09-06 English Electric Valve Co Ltd Magnetron cathode assembly
US5172030A (en) * 1988-01-20 1992-12-15 Eev Limited Magnetron
GB2231198A (en) * 1989-03-31 1990-11-07 Litton Systems Inc Enhanced secondary electron emitter.
US4975656A (en) * 1989-03-31 1990-12-04 Litton Systems, Inc. Enhanced secondary electron emitter
GB2231198B (en) * 1989-03-31 1994-04-27 Litton Systems Inc Secondary electron emission cathode
WO1995026039A1 (en) * 1994-03-22 1995-09-28 Vladimir Iliich Makhov Magnetron

Also Published As

Publication number Publication date
DE1541003B1 (en) 1971-07-08
US3403281A (en) 1968-09-24
NL130735C (en) 1900-01-01
NL6609353A (en) 1967-02-17
SE325082B (en) 1970-06-22
FR1514978A (en) 1968-03-01
CH437542A (en) 1967-06-15

Similar Documents

Publication Publication Date Title
GB1141495A (en) Improvements in or relating to magnetrons
GB1272498A (en) X-ray tube having a metal envelope
GB1452307A (en) Magnetron
GB1019697A (en) Glow discharge device
US2347715A (en) Arc starting device
US2424526A (en) Electric discharge device
GB1209078A (en) Improvements in or relating to thermionic dispenser cathodes
GB1020170A (en) A gas discharge lamp
GB958813A (en) Magnetron
GB995419A (en) An electric discharge lamp
GB1193518A (en) Electron Discharge Device for Generating Spectral Radiation
GB1134562A (en) Methods of preventing localised arcing within the evacuated chamber of electrical discharge apparatus
GB1449614A (en) Magnetrons
GB1099413A (en) Improvements in or relating to hollow-cathode electric discharge lamps
GB1263019A (en) Indirectly heated thermionic cathode
GB1101279A (en) Improvements in or relating to arc-electrodes
GB1189940A (en) Magnetron Cathodes
GB1218667A (en) Electron discharge device heater
GB941730A (en) Improvements relating to electric discharge lamps
GB1049625A (en) Improvements in or relating to electron discharge devices
GB966077A (en) Improvements in and relating to electric discharge lamps
GB1230355A (en)
AU6471465A (en) Oxide-coated cathode for electrical discharge tubes
SE309282B (en)
GB1035593A (en) Improvements in or relating to low-pressure mercury vapour discharge lamps