GB650935A - Improvement in electron discharge device - Google Patents

Improvement in electron discharge device

Info

Publication number
GB650935A
GB650935A GB28467/46A GB2846746A GB650935A GB 650935 A GB650935 A GB 650935A GB 28467/46 A GB28467/46 A GB 28467/46A GB 2846746 A GB2846746 A GB 2846746A GB 650935 A GB650935 A GB 650935A
Authority
GB
United Kingdom
Prior art keywords
anode
cathode
mode
asymmetry
flanges
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
GB28467/46A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products 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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB650935A publication Critical patent/GB650935A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52Magnetrons, 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
    • H01J25/54Magnetrons, 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 only one cavity or other resonator, e.g. neutrode tubes
    • H01J25/56Magnetrons, 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 only one cavity or other resonator, e.g. neutrode tubes with interdigital arrangements of anodes, e.g. turbator tube

Landscapes

  • Microwave Tubes (AREA)

Abstract

650,935. Magnetrons. SYLVANIA ELECTRIC PRODUCTS, Inc. Sept. 23, 1946, No. 28467. Convention date, Sept. 29, 1945. [Class 39 (i)] [Also in Group XL (b)] A magnetron comprises two interdigitated anode members 10, 11, Fig. 1, surrounding a cathode 6, a cavity resonator connected across the anode members, preferably via discs 4, 5 sealed through the envelope, and the device is of fixed or adjustable asymmetric construction to enable the establishment of a mode of oscillation within the cavity in which a stationary electric field varies through one or more maxima and minima in accordance with the angular position at a constant radius around the axis of the anode, the asymmetry being other than that due to an output coupling loop. To provide the asymmetry, (a) the cathode may be positioned eccentrically within the anode, Fig. 9 (not shown); (b) one anode finger may be longer or thinner than the others, Figs. 10, 11 (not shown), or two diametrically opposite fingers are larger than the others; or (c) the asymmetry may be in the external cavity resonator, e.g. by removing one or both tuning screws 43, Fig. 13, on the cavity diameter perpendicular to the radius passing through the output coupling loop. The cathode 6 is indirectly heated having a heater 7 supported between ceramic members 8, 9, and the cathode leads 14, 15 may be of a chromium-nickeliron alloy suitable for sealing to glass. Flanges 24, 25 confine the discharge. The anode members 10, 11 are connected to discs 4, 5 via flanges 10a on the former and flanges 12 and fingers 13 on the latter, the parts being soldered together. The magnetic field is produced by a permanent or electro-magnet 37. Five, seven, or nine tuning screws 43, Fig. 13, may be used and may have blocks at their inner ends to contact the upper and lower ends of the resonator conductively or insulatingly. The mode of oscillation is discussed in detail and is distinguished from the known # mode and other radial modes. In the discussion of the known # mode it is stated that the device may operate at a harmonic of its resonant freequency in which case the glass envelope parts are at voltage nodes. Specifications 449,920, 465,650 and 550,081 are referred to.
GB28467/46A 1945-09-29 1946-09-23 Improvement in electron discharge device Expired GB650935A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US619289A US2639405A (en) 1945-09-29 1945-09-29 Electron discharge device

Publications (1)

Publication Number Publication Date
GB650935A true GB650935A (en) 1951-03-07

Family

ID=24481269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28467/46A Expired GB650935A (en) 1945-09-29 1946-09-23 Improvement in electron discharge device

Country Status (4)

Country Link
US (1) US2639405A (en)
FR (1) FR933936A (en)
GB (1) GB650935A (en)
NL (1) NL81363C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841737A (en) * 1951-04-23 1958-07-01 Philips Corp Electric discharge tube
US2829306A (en) * 1953-04-13 1958-04-01 Bell Telephone Labor Inc Oscillating electrical circuits
US2799803A (en) * 1954-04-10 1957-07-16 Csf Magnetron tubes having adjustable frequency
US2843785A (en) * 1954-04-19 1958-07-15 Sylvania Electric Prod Thermal insulation for cathode
NL90563C (en) * 1954-06-21
DE1060500B (en) * 1955-10-22 1959-07-02 Deutsche Elektronik Gmbh Magnetic field tubes in which the entire electrode and oscillation system is arranged in an evacuated glass vessel
US2940007A (en) * 1958-01-20 1960-06-07 Gen Electric Magnetron circuits
US3219863A (en) * 1960-10-07 1965-11-23 Ling Temco Electronics Inc Electron tube having concentric electrodes

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB449920A (en) * 1934-05-07 1936-07-07 Meaf Mach En Apparaten Fab Nv Improvements in or relating to electron valves
US2144222A (en) * 1935-08-15 1939-01-17 Telefunken Gmbh Electron discharge device
US2209932A (en) * 1937-12-24 1940-07-30 Gen Electric Resistance line welding control
US2281717A (en) * 1941-01-21 1942-05-05 Bell Telephone Labor Inc Electron discharge apparatus
NL68219C (en) * 1941-07-19
US2408234A (en) * 1941-11-26 1946-09-24 Raytheon Mfg Co Tunable magnetron
US2395043A (en) * 1941-12-02 1946-02-19 Standard Telephones Cables Ltd Electron discharge device
US2424886A (en) * 1942-12-29 1947-07-29 Rca Corp Magnetron
US2414084A (en) * 1943-05-11 1947-01-14 Bell Telephone Labor Inc Tunable resonator and oscillator
US2429291A (en) * 1943-07-01 1947-10-21 Westinghouse Electric Corp Magnetron
US2421636A (en) * 1944-05-29 1947-06-03 Gen Electric Tunable magnetron
US2428888A (en) * 1946-04-15 1947-10-14 Gen Electric High-frequency electric discharge device

Also Published As

Publication number Publication date
FR933936A (en) 1948-05-05
NL81363C (en)
US2639405A (en) 1953-05-19

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