GB627343A - Improvements in and relating to electron discharge devices of the magnetron type - Google Patents

Improvements in and relating to electron discharge devices of the magnetron type

Info

Publication number
GB627343A
GB627343A GB8492/47A GB849247A GB627343A GB 627343 A GB627343 A GB 627343A GB 8492/47 A GB8492/47 A GB 8492/47A GB 849247 A GB849247 A GB 849247A GB 627343 A GB627343 A GB 627343A
Authority
GB
United Kingdom
Prior art keywords
electron discharge
relating
march
discharge devices
gap
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
GB8492/47A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB627343A publication Critical patent/GB627343A/en
Expired legal-status Critical Current

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
    • H01J1/30—Cold cathodes, e.g. field-emissive cathode
    • H01J1/304—Field-emissive cathodes
    • 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
    • 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

Landscapes

  • Microwave Tubes (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

627,343. Magnetrons. BRITISH THOMSONHOUSTON CO., Ltd. March 28, 1947, No. 8492. Convention date, March 28, 1946. [Class 39 (i)] A cold emission cathode for an electron discharge device comprises juxtaposed members electrically insulated from each other and defining a gap, across which a high electric field may be established, and a high impedance in series with the gap. In the magnetron shown in Fig. 1, the members 23, 24 are hollow cylinders spaced apart by an insulator 29. The edges of the cylinders facing each other may be sharp or may be provided with a series of sharp points or serrations. 24 is joined to the anode through impedance 30 whilst a lead is provided to enable 23 to be connected to a source of potential' which may be a pulse.
GB8492/47A 1946-03-28 1947-03-28 Improvements in and relating to electron discharge devices of the magnetron type Expired GB627343A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US657716A US2513933A (en) 1946-03-28 1946-03-28 Cold cathode magnetron

Publications (1)

Publication Number Publication Date
GB627343A true GB627343A (en) 1949-08-08

Family

ID=24638380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8492/47A Expired GB627343A (en) 1946-03-28 1947-03-28 Improvements in and relating to electron discharge devices of the magnetron type

Country Status (4)

Country Link
US (1) US2513933A (en)
BE (1) BE474423A (en)
FR (1) FR943296A (en)
GB (1) GB627343A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238903A (en) * 1989-12-08 1991-06-12 Eev Ltd Magnetron cathode

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782342A (en) * 1947-07-01 1957-02-19 Rca Corp Magnetron
US2691758A (en) * 1951-01-26 1954-10-12 Israel R Senitzky Method of measuring pressure with a magnetron
US2633556A (en) * 1951-08-02 1953-03-31 Beverly D Kumpfer Millimeter wave generator
US2813992A (en) * 1952-11-29 1957-11-19 Rca Corp Gas discharge device utilizing controlled electron trapping
US2869031A (en) * 1955-03-01 1959-01-13 Brett Herbert Cathode
US3091719A (en) * 1959-04-14 1963-05-28 Field Emission Corp Microwave transducer
US4104559A (en) * 1976-11-01 1978-08-01 Microwave Associates, Inc. Isopolar magnetron supported with rigid insulation in a remote housing
US5159241A (en) * 1990-10-25 1992-10-27 General Dynamics Corporation Air Defense Systems Division Single body relativistic magnetron
IL106905A (en) * 1993-09-03 1997-01-10 Israel State Magnetron construction particularly useful as a relativistic magnetron
US6686696B2 (en) * 2001-03-08 2004-02-03 Genvac Aerospace Corporation Magnetron with diamond coated cathode

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1309704A (en) * 1919-07-15 stoekle
US1279850A (en) * 1913-05-06 1918-09-24 William Dubilier Wireless apparatus and method therefor.
US1230004A (en) * 1915-09-18 1917-06-12 Gen Electric Incandescent cathode device.
US1577846A (en) * 1918-12-27 1926-03-23 Western Electric Co Electric space discharge device and method of operating the same
DE390479C (en) * 1919-12-12 1924-02-19 Julius Edgar Lilienfeld Dr High vacuum pipes, in particular Roentgen pipes, valve pipes, transmitter pipes or reinforcement pipes
US1565659A (en) * 1921-09-03 1925-12-15 Julius E Lilienfeld High-vacuum device for influencing currents
US1661579A (en) * 1922-07-28 1928-03-06 Cooper Hewitt Electric Co Bulb rectifier
US1705377A (en) * 1922-08-08 1929-03-12 Vickers Electrical Co Ltd Thermionic device
US1863702A (en) * 1926-04-12 1932-06-21 Raytheon Inc Gaseous conduction method and apparatus
US1930088A (en) * 1929-01-03 1933-10-10 Gen Electric Vapor Lamp Co Electrical discharge device
US1984877A (en) * 1930-11-21 1934-12-18 Telefunken Gmbh Gaseous discharge amplifier tube
US1986894A (en) * 1931-07-22 1935-01-08 Radio Res Lab Inc Nonregenerative system and method of operating the same
US1965589A (en) * 1932-10-11 1934-07-10 Gen Electric Vapor Lamp Co Gaseous electric discharge device and method of making the same
US2163157A (en) * 1937-07-22 1939-06-20 Bell Telephone Labor Inc Electron discharge apparatus
US2293468A (en) * 1939-09-16 1942-08-18 Univ Illinois Cold cathode rectifier
US2409716A (en) * 1941-09-27 1946-10-22 Westinghouse Electric Corp High-voltage discharge device
US2406276A (en) * 1942-11-13 1946-08-20 Gen Electric Electric discharge device
US2456896A (en) * 1944-08-08 1948-12-21 Westinghouse Electric Corp Ultra high frequency device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238903A (en) * 1989-12-08 1991-06-12 Eev Ltd Magnetron cathode
GB2238903B (en) * 1989-12-08 1994-10-19 Eev Ltd Magnetrons

Also Published As

Publication number Publication date
BE474423A (en)
FR943296A (en) 1949-03-03
US2513933A (en) 1950-07-04

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