GB640255A - Improvements in magnetron electron-discharge devices - Google Patents

Improvements in magnetron electron-discharge devices

Info

Publication number
GB640255A
GB640255A GB7363/47A GB736347A GB640255A GB 640255 A GB640255 A GB 640255A GB 7363/47 A GB7363/47 A GB 7363/47A GB 736347 A GB736347 A GB 736347A GB 640255 A GB640255 A GB 640255A
Authority
GB
United Kingdom
Prior art keywords
cathode
march
anode
cylinder
coated
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
GB7363/47A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB640255A publication Critical patent/GB640255A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H01J25/58—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having a number of resonators; having a composite resonator, e.g. a helix
    • H01J25/587—Multi-cavity magnetrons
    • 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)

Abstract

640,255. Magnetrons. RADIO CORPORATION OF AMERICA. March 17, 1947, No. 7363. Convention date, March 16, 1946. [Class 39 (i)] In a magnetron the cathode 13, Fig. 2, is so shaped as to have a plurality of plane surfaces, and only some, 28, of the surfaces are coated with emissive material, the coated surfaces being so disposed as to be relatively inaccessible to wrongly phased electrons returning to the cathode. The cathode may be a star-shaped nickel body, as shown, or may consist of radial fins 31 attached to a cylinder 30, Fig. 4, or of a cylinder with inclined punched-out fins, Fig. 5 (not shown). The cathode is indirectly heated in all forms and is supported by glass bead and wire support members from the anode, Fig. 3 (not shown). The anode 10, Fig. 2, has radial members 11 with cavity resonators in between. A permanent magnet provides the magnetic field.
GB7363/47A 1946-03-16 1947-03-17 Improvements in magnetron electron-discharge devices Expired GB640255A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US654934A US2592206A (en) 1946-03-16 1946-03-16 Magnetron

Publications (1)

Publication Number Publication Date
GB640255A true GB640255A (en) 1950-07-19

Family

ID=24626812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7363/47A Expired GB640255A (en) 1946-03-16 1947-03-17 Improvements in magnetron electron-discharge devices

Country Status (5)

Country Link
US (1) US2592206A (en)
BE (1) BE471896A (en)
FR (1) FR943339A (en)
GB (1) GB640255A (en)
NL (1) NL67823C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006532B (en) * 1951-07-12 1957-04-18 Rca Corp Glow cathode for magnetron tubes
US2869031A (en) * 1955-03-01 1959-01-13 Brett Herbert Cathode
GB2172426A (en) * 1985-02-06 1986-09-17 New Japan Radio Co Ltd Cathodes for magnetrons
GB2346732A (en) * 1999-02-10 2000-08-16 New Japan Radio Co Ltd Cathode with angled emitting inserts

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2784346A (en) * 1950-01-28 1957-03-05 Rca Corp Electron discharge device
US2992360A (en) * 1953-05-13 1961-07-11 Csf Suppressor device for the secondary emission current in magnetic field electronic tubes
GB1009870A (en) * 1961-04-27 1965-11-17 Gen Electric Crossed-field electric discharge tube
US3315121A (en) * 1961-04-27 1967-04-18 Gen Electric Crossed-field electric discharge device
US3413516A (en) * 1965-08-30 1968-11-26 Gen Electric Crossed-field discharge devices and oscillators and amplifiers incorporating the same
US3458753A (en) * 1965-08-30 1969-07-29 Gen Electric Crossed-field discharge devices and couplers therefor and oscillators and amplifiers incorporating the same
GB2029632B (en) * 1978-09-02 1982-08-11 English Electric Valve Co Ltd Magnetrons

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032179A (en) * 1933-04-12 1936-02-25 Westinghouse Electric & Mfg Co Oxide coated cathode for heavy duty service
US2130280A (en) * 1933-04-12 1938-09-13 Telefunken Gmbh Electron discharge tube
NL43310C (en) * 1934-12-29
US2225259A (en) * 1937-06-28 1940-12-17 Julius Pintsch Kommandit Ges Ultra-high-frequency generator
DE699482C (en) * 1937-08-24 1940-11-29 Telefunken Gmbh Magnetic field tubes with electron sources located outside the anode cylinder
US2138918A (en) * 1938-03-24 1938-12-06 Rca Corp Cathode
US2358542A (en) * 1940-07-26 1944-09-19 Rca Corp Currentless grid tube
US2411601A (en) * 1941-09-30 1946-11-26 Raytheon Mfg Co Electronic discharge device
US2409038A (en) * 1942-12-31 1946-10-08 Rca Corp Magnetron and circuit therefor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006532B (en) * 1951-07-12 1957-04-18 Rca Corp Glow cathode for magnetron tubes
US2869031A (en) * 1955-03-01 1959-01-13 Brett Herbert Cathode
GB2172426A (en) * 1985-02-06 1986-09-17 New Japan Radio Co Ltd Cathodes for magnetrons
GB2172426B (en) * 1985-02-06 1989-06-14 New Japan Radio Co Ltd Cathode for magnetron
GB2346732A (en) * 1999-02-10 2000-08-16 New Japan Radio Co Ltd Cathode with angled emitting inserts
US6420821B1 (en) 1999-02-10 2002-07-16 New Japan Radio Co., Ltd Cathode for magnetron
GB2346732B (en) * 1999-02-10 2004-01-07 New Japan Radio Co Ltd Cathode for magnetron

Also Published As

Publication number Publication date
US2592206A (en) 1952-04-08
NL67823C (en)
FR943339A (en) 1949-03-04
BE471896A (en)

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