US2523049A - Water-cooled multicircuit magnetron - Google Patents

Water-cooled multicircuit magnetron Download PDF

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Publication number
US2523049A
US2523049A US700758A US70075846A US2523049A US 2523049 A US2523049 A US 2523049A US 700758 A US700758 A US 700758A US 70075846 A US70075846 A US 70075846A US 2523049 A US2523049 A US 2523049A
Authority
US
United States
Prior art keywords
envelope
anode
sections
terminal
magnetron
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 - Lifetime
Application number
US700758A
Other languages
English (en)
Inventor
Richard B Nelson
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.)
General Electric Co
Original Assignee
General Electric Co
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 BE481112D priority Critical patent/BE481112A/xx
Priority to NL137606D priority patent/NL137606B/xx
Priority to BE483243D priority patent/BE483243A/xx
Priority to BE481751D priority patent/BE481751A/xx
Priority to NL73373D priority patent/NL73373C/xx
Priority to US601122A priority patent/US2546773A/en
Priority claimed from US601123A external-priority patent/US2496887A/en
Priority to US700758A priority patent/US2523049A/en
Application filed by General Electric Co filed Critical General Electric Co
Priority to GB26595/47A priority patent/GB655409A/en
Priority to FR953694D priority patent/FR953694A/fr
Priority to FR58512D priority patent/FR58512E/fr
Priority to GB5645/48A priority patent/GB675176A/en
Priority to GB4929/48A priority patent/GB675175A/en
Priority to FR58702D priority patent/FR58702E/fr
Publication of US2523049A publication Critical patent/US2523049A/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J23/005—Cooling methods or arrangements
    • 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

Definitions

  • My invention relates specifically to Water cooled vane type magnetrons and more generally to improved electric discharge devices of the magnetron type.
  • Magnetron devices including a plurality of coupled resonant circuits as an anode structure, have been developed for high frequency applications.
  • My invention relates to an improved device of this character which is? particularly adapted for high power continuous wave applications and is Well suited for industrial applications such as dielectric heating.
  • ter-:ine my invention contribute to a device which is rugged, relatively yeasy to manufacture, and wl'iich is easily connected with ⁇ the high irequency cil .uits with which it is used.
  • a circular array of anode elements 2 rto II, inclusive, are supported from the inner wall of envelope l in uniformly spaced radial relation.
  • Each of the elements is, in the preferred embodiment, illustrated of substantially Usliaped in a radia plane and is ⁇ formed from rod-like st ck such as copper tubing.
  • rod-like st ck such as copper tubing.
  • Uasl'iapt-:d anode section communicate with IZ and I3 formed in the wall of the envelope.
  • passages I2 and I3 areI formed by machining the cylindrical recesses in the' outer wall of the copper cylinder, and then completing the ⁇ passages by bracing to the envelope a sheet metal cylinder Id.
  • the upper passagev l2' communicates ⁇ with the fitting l5 through a longitudinal passage IS.
  • a similar fluid passage I3! communicating with the cir-'f The features which charac ⁇ trode space.
  • the particular form of the anode elements described also permits strapping of the anode in an improved manner.
  • a pair of ring straps El and i8 surround the longitudinal or portion of each U-shaped'ianode element. Strap I'i is electrically connected, as by brazing,
  • strap I3 is j connected with the remaining anode sections. illustrated in Fig. 2, the strap I3 is connected' with the anode sections 3, 5, l, S and II.
  • the rings of the present invention both of the same diameter and are shielded from the cathode to a considerable extent by the :base portions of the anode sections. near the axial center of the anode sections and symmetricallyvwith respect to the cathode pro? a helical cathode i9 lccatedcentrally in the open?v ing supported from the envelope I by means including a terminal and lead-in structure. As illustrated in Fig.
  • the upper end wall of the envelop@ is provided by an apertured metal member EEE which is in the shape of a truncated 44)' cone directed inwardly of the envelope.
  • the member il@ is formed of material having low magnetic reluctance and in addition to providing a portion of the envelope provides a pole piece for producing a magnetic field in the interelecf
  • a sheet metal disk or washer 2i isr secured to the exterior of the member 2li and pro vided with upstanding anges 22 and 23.
  • the outer flange is bonded to the inner wall of the envelope to position and hermetically seal the pole piece to the envelope.
  • the inner flange 2t is joined to a anged member 24 which surrounds the aperture in the pole piece 21
  • an inner flange r25 on the member 24 is sealed to the lower edge of a cylinn Thisr 5arrangement' of straps provides very low lipped Also, the location of the rings' drical insulator 26.
  • a metal sleeve y21 which provides one terminal for the filamentary cathode I9, is sealed to the upper edge of the insulating cylinder 26.
  • the other terminal for the cathode is provided by a cylindrical member 28 closed at its outer end and sealed to the terminal 2'
  • the upper terminal of the cathode is connected directly to the terminal 28 by an elongated conducting stud 39 which is bonded to the inner end wall of the terminal 28.
  • this stud is substantially smaller in diameter than the insulating cylinder 26 to permit the connection of the other terminal of the cathode I9 with the sleeve terminal 2 ⁇
  • the lower terminal of the cathode is connected with a conducting end shield 33 which is, in turn, connected by a central post at 32 to an upper end shield 34.
  • the upper end shield is connected with the cylinder 3
  • a vpole piece similar to the member 20 is provided directly below the anode structure by a member 36 of frusto-conical shape.
  • This member is bonded to the inner wall of the envelope with the flattened central portion adjacent the interelectrode space.
  • the members 2U and 35 cooperate with a coil 31 which surrounds the envelope to produce a magnetic lield between the anode and cathode which is substantially parallel to the axis of the cathode. It will be apparent that the wall of the envelope provides a magnetic shunt with respect to the interelectrode space, and for this reason it is desirable to utilize a material of high magnetic reluctance for the envelope and to provide a magnetic yoke 3'1 about the coil which terminates opposite the members 20 and 3S.
  • the envelope of the device is completed by a seal construction which provides concentric terminals for connection with an external high frequency circuit.
  • a cup-shaped metal terminal 38 is supported centrally within the envelope and sealed thereto by a dome-like insulator 38 which is sealed at its lower edge to a cylindrical sheet metal member 40.
  • the member 4Q terminates at its lower end in a ange 4
  • and ring 42 are bonded together to hermetically seal the envelope and support the sealing structure within the metal cylinder
  • the central terminal 38 is conductively connected by a strap 43 with one of the anode sections 6. As illustrated, this strap extends through an opening 44 in the pole piece 36.
  • the cup-shaped terminal 38 and the ring 42 provide concentric terminals which are adapted to connect the magnetron device with a concentric transmission line, through which the power produced by the device is conducted to a suitable load.
  • high frequency oscillations are produced by exciting the resonant structure provided by the various anode sections by means of a space charge produced in the region between the inner ends of the anode sections and the cathode and moving under the combined action of an electric eld produced by voltage applied between the anode and cathode, and the axial magnetic eld produced in the interelectrode space by coil 31 and cooperating pole pieces 2
  • the illustrated embodiment of my invention provides a magnetic device which is of relatively simple structure, which is adapted to be water-cooled, and which is easily plugged into both the coil for producing a magnetic field and the concentric terminals of an output circuit.
  • an anode structure including a cylindrical supporting envelope, a plurality of anode sections supported from the inner wall of said envelope and extending radially inwardly in circumferentially spaced relation, each of said anode sections comprising bent tubing having a substantially U-shaped section in a radial plane and having the open ends of the tubing of each section communicating with passages in the Walls of the envelope, and a pair of conducting rings threading the openings provided by said U- shaped anode sections, each being electrically connected with different alternate anode sections.
  • an anode structure including a cylindrical supporting envelope, a plurality of anode sections supported within said envelope and extending radially -inwardly in circumferentially spaced relation and providing a plurality of cavity resonators, each of said anode sections comprising bent tubing' having a substantially U-shaped section in a radial plane and each having the arms thereof extending outwardly, and means supported from the side wall of said envelope providing passages communicating with the outwardly extending open ends of the tubing forming said sections.
  • an anode structure including a cylindrical supporting envelope, an even number of anode sections supported within said envelope and extending radially inwardly and in circumferentially spaced relation, each of said anode sections comprising bent tubing having a substantially U- shaped section in a radial plane, said sections having the base'portions thereof extending in an axial direction and in circumferentially spaced relation and dening a central opening of the anode structure, and a pair of conducting rings threading the openings provided by said U-shaped anode sections, one of said rings being connected with the even number anode sections on the side of the base portions away from the central opening and the other of said rings being connected with the odd numbered anode sections on the side of the baseportions away from the central open; ing.
  • an anode structure comprising a plurality of anode sections extending radially inwardly in circumferentially spaced relation to provide a circular array, each of said anode sections having an aperture therethrough which is symmetrical with respect to a central plane through said anode transverse to the axis of the circular array, and a pair of conducting rings threading said apertures with each ring on a dverent side of said central plane with a portion of each of said anode sections interposed between said rings and said cathode, one of said rings being connected with alternate anode sections and the other of said rings being connected with the remaining anode sections.
  • an anode structure comprising a plurality of anode sections, a support, said anode sections being mounted within said support and extending radially inwardly to provide a circular array of anode sections, each of said sections having an aperture therethrough dei-med in part by axially extending portions at the inner ends of the anode section, and a pair of conducting rings of equal diameters threading said apertures with each ring positioned on opposite sides of a plane extending through said anode structure at the longitudinal center thereof and in a direction perpendicular to the longitudinal axis thereof, one of said rings being connected with the axially extending portions of alternate anode sections on the sides thereof facing said apertures and the other of said rings being connected with the axially extending portions of the remaining anode sections on the sides thereof facing said apertures.
  • an anode structure comprising a plurality of anode sections extending radially inwardly in circumferentially spaced relation7 each of said sections having an aperture therethrough, said apertures being dened in part by axially extending portions of said anode sections located at the inner ends thereof, and a pair of conducting rings threading said apertures and positioned on opposite sides of a plane passing through the center of said anode sections in a direction perpendicular to the axis thereof, one of said rings being connected to the axially extending portions of alternate anode sections on the side thereof facing said apertures, and the other of said rings being connected with the axial portions of the remaining anode sections on the side thereof facing the apertures therethrough.
  • an electric discharge device of the magnetron type comprising a generally cylindrical envelope, an anode structure supported within said envelope intermediate the ends thereof and including a plurality of circumferentially displaced cavity resonators, an end wall for said envelope including a pole piece, a second pole piece supported on the opposite side of said anode structure within said envelope and a closure at the other end of said envelope including a concentrically located terminal and an annular sealing member housed within said envelope and means extending through said second pole piece coupling ,said central terminal with said anode structure.
  • an electric discharge device of the magnetron type comprising a generally cylindrical envelope, an anode structure supported within said envelope intermediate the ends thereof and including a plurality of radially extending anode sections dening a plurality of circumferentially displaced resonator elements, an end wall for said envelope including a pole piece, a second pole piece supported from said envelope on the opposite side of said anode structure within said envelope and a closure for the other end of said envelope including a concentrically located ter- Iii minal and an annular sealing member located on the side of said second pole piece remote from said anode and housed within said envelope, and means coupling said central terminal with said anode structure.
  • an electric discharge device of the magnetron type comprising a generally cylindrical envelope, an anode structure supported within said envelope intermediate the ends thereof and including a plurality of circumferentially displaced resonator structures, an end wall for said envelope including a pole piece having a frusto conical shape, a second pole piece of frustoconical shape supported on the opposite side of said anode structure and secured to the inner wall of said envelope, a closure at the other end of said envelope including a concentrically located terminal and a sealing member interposed between said terminal and the wall of said envelope, and a conductor coupling said central terminal with said anode structure and providing with the wall of said envelope a concentric transmission line section.
  • an electric discharge device of the mag"- netron type comprising a generally cylindrical envelope, an anode structure supported within said envelope intermediate the ends thereof and including a plurality of circumferentially displaced resonator structures, a closure for one end of said envelope including a concentrically located terminal and a sealing member interposed between said terminal and the Wall of said envelope, and a conductor coupling said central terminal with said anode structure and providing with the wall of said envelope a concentric transmission line section.
  • an electric discharge device of the magnetron type comprising a generally cylindrical envelope, an anode structure supported Within said envelope intermediate the ends thereof and including a plurality of circumferentially displaced resonator structures, a closure at one end of said envelope including a concentrically located terminal and a sealing member interposed between said terminal and the wall of said en" velope and housed within said. envelope, and a conductor coupling said central terminal with said anode structure and providing with the wall of said envelope a concentric transmission line section.

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  • Microwave Tubes (AREA)
US700758A 1945-06-23 1946-10-02 Water-cooled multicircuit magnetron Expired - Lifetime US2523049A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
BE481112D BE481112A (ko) 1945-06-23
NL137606D NL137606B (ko) 1945-06-23
BE483243D BE483243A (ko) 1945-06-23
BE481751D BE481751A (ko) 1945-06-23
NL73373D NL73373C (ko) 1945-06-23
US601122A US2546773A (en) 1945-06-23 1945-06-23 Anode structure for space resonant discharge devices
US700758A US2523049A (en) 1945-06-23 1946-10-02 Water-cooled multicircuit magnetron
GB26595/47A GB655409A (en) 1945-06-23 1947-10-02 Improvements in and relating to magnetrons
FR953694D FR953694A (fr) 1945-06-23 1947-10-02 Magnétron perfectionné à refroidissement par circulation de fluide
FR58512D FR58512E (fr) 1945-06-23 1948-02-24 Magnétron perfectionné à refroidissement par circulation de fluide
GB5645/48A GB675176A (en) 1945-06-23 1948-02-25 Improvements in and relating to electronic devices of the magnetron type
GB4929/48A GB675175A (en) 1945-06-23 1948-02-25 Improvements in and relating to high frequency electron discharge devices of the magnetron type
FR58702D FR58702E (fr) 1945-06-23 1948-02-26 Magnétron perfectionné à refroidissement par circulation de fluide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US601123A US2496887A (en) 1945-06-23 1945-06-23 High-frequency electrical apparatus
US700758A US2523049A (en) 1945-06-23 1946-10-02 Water-cooled multicircuit magnetron

Publications (1)

Publication Number Publication Date
US2523049A true US2523049A (en) 1950-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
US700758A Expired - Lifetime US2523049A (en) 1945-06-23 1946-10-02 Water-cooled multicircuit magnetron

Country Status (5)

Country Link
US (1) US2523049A (ko)
BE (3) BE483243A (ko)
FR (3) FR953694A (ko)
GB (3) GB655409A (ko)
NL (2) NL73373C (ko)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961561A (en) * 1957-10-29 1960-11-22 Gen Electric Internal magnetic deflection system for electron beam generator
US3751704A (en) * 1970-12-30 1973-08-07 Thomson Csf Delay lines cooled by liquid circulation and electronic tubes utilising such delay lines
US4028583A (en) * 1975-08-07 1977-06-07 Atomic Energy Of Canada Limited High power-double strapped vane type magnetron
DE2931099A1 (de) * 1979-07-06 1981-02-05 Dodonov J I Hoechstfrequenzgeraet vom magnetrontyp
US4256990A (en) * 1978-03-06 1981-03-17 Guido Busacca Cooling system for tunable microwave generator
US5418427A (en) * 1992-05-28 1995-05-23 Litton Systems, Inc. Internally cooled forward wave crossed field amplifier anode vane
US5600207A (en) * 1992-05-28 1997-02-04 Litton Systems, Inc. Preferentially cooled forward wave crossed-field amplifier anode

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5387841A (en) * 1991-08-30 1995-02-07 Eev Limited Magnetron having an anode with cooling channels
GB9118651D0 (en) * 1991-08-30 1991-10-16 Eev Ltd Magnetron

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2163157A (en) * 1937-07-22 1939-06-20 Bell Telephone Labor Inc Electron discharge apparatus
GB509102A (en) * 1937-10-08 1939-07-11 Electricitatsgesellschaft Sani Improvements in vacuum electric discharge apparatus
US2189501A (en) * 1935-09-04 1940-02-06 Electricitatsgesellschaft Sani Short wave generator
US2411299A (en) * 1941-11-12 1946-11-19 Research Corp High-frequency triode oscillator
US2414085A (en) * 1944-12-14 1947-01-14 Bell Telephone Labor Inc Oscillator
US2422465A (en) * 1943-02-02 1947-06-17 Gen Electric High-frequency magnetrons
US2446531A (en) * 1945-05-21 1948-08-10 Raytheon Mfg Co Electron discharge device
US2485401A (en) * 1946-06-04 1949-10-18 Gen Electric Magnetron

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2189501A (en) * 1935-09-04 1940-02-06 Electricitatsgesellschaft Sani Short wave generator
US2163157A (en) * 1937-07-22 1939-06-20 Bell Telephone Labor Inc Electron discharge apparatus
GB509102A (en) * 1937-10-08 1939-07-11 Electricitatsgesellschaft Sani Improvements in vacuum electric discharge apparatus
US2411299A (en) * 1941-11-12 1946-11-19 Research Corp High-frequency triode oscillator
US2422465A (en) * 1943-02-02 1947-06-17 Gen Electric High-frequency magnetrons
US2414085A (en) * 1944-12-14 1947-01-14 Bell Telephone Labor Inc Oscillator
US2446531A (en) * 1945-05-21 1948-08-10 Raytheon Mfg Co Electron discharge device
US2485401A (en) * 1946-06-04 1949-10-18 Gen Electric Magnetron

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2961561A (en) * 1957-10-29 1960-11-22 Gen Electric Internal magnetic deflection system for electron beam generator
US3751704A (en) * 1970-12-30 1973-08-07 Thomson Csf Delay lines cooled by liquid circulation and electronic tubes utilising such delay lines
US4028583A (en) * 1975-08-07 1977-06-07 Atomic Energy Of Canada Limited High power-double strapped vane type magnetron
US4256990A (en) * 1978-03-06 1981-03-17 Guido Busacca Cooling system for tunable microwave generator
DE2931099A1 (de) * 1979-07-06 1981-02-05 Dodonov J I Hoechstfrequenzgeraet vom magnetrontyp
US4274032A (en) * 1979-07-06 1981-06-16 Dodonov J I High power liquid cooled double strapped vane type magetron
US5418427A (en) * 1992-05-28 1995-05-23 Litton Systems, Inc. Internally cooled forward wave crossed field amplifier anode vane
US5600207A (en) * 1992-05-28 1997-02-04 Litton Systems, Inc. Preferentially cooled forward wave crossed-field amplifier anode

Also Published As

Publication number Publication date
FR58702E (fr) 1954-03-22
FR953694A (fr) 1949-12-12
NL137606B (ko)
BE481751A (ko)
BE483243A (ko)
GB655409A (en) 1951-07-18
GB675176A (en) 1952-07-09
GB675175A (en) 1952-07-09
NL73373C (ko)
FR58512E (fr) 1954-01-27
BE481112A (ko)

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