US2130510A - Electron discharge device - Google Patents

Electron discharge device Download PDF

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Publication number
US2130510A
US2130510A US151093A US15109337A US2130510A US 2130510 A US2130510 A US 2130510A US 151093 A US151093 A US 151093A US 15109337 A US15109337 A US 15109337A US 2130510 A US2130510 A US 2130510A
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US
United States
Prior art keywords
cathode
anode
members
electron discharge
discharge device
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
US151093A
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English (en)
Inventor
Arthur L Samuel
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories 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 Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US151093A priority Critical patent/US2130510A/en
Priority to GB16777/38A priority patent/GB497138A/en
Priority to NL88571A priority patent/NL64997C/xx
Priority to FR839910D priority patent/FR839910A/fr
Application granted granted Critical
Publication of US2130510A publication Critical patent/US2130510A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • This invention relates to electron discharge devices and more particularly to such devices, for example of the magnetron type, suitable for the generation and amplification of ultra-high frequency impulses.
  • One object of this invention is to increase the power capacity of high frequency electron discharge devices.
  • Another object of this invention is to facilitate 0 the production of a strong concentrated magnetic field adjacent the cathode in devices of the magnetron type.
  • a further object of this invention is to reduce end cooling effects in thermionic cathodes in electron discharge devices.
  • a magnetron comprises a linear incandescible filamentary cathode and a cylindrical anode encompassing the cathode and mounted coaxially therewith.
  • the anode is in the form of a tubular eyelet extending transversely through an elongated hollow member and adjacent one end thereof, and
  • 25 means are provided for circulating a cooling medium in the hollow member and about the tubular eyelet, whereby the anode may be maintained at a safe operating potential and the power capacity of the magnetron increased.
  • the cathode is supported by and between magnetic members secured to the ends thereof.
  • the magnetic members or blocks may be supported in turn by resilient strips mounted upon 35 substantially semi-cylindrical metallic supports opposed to each other and encompassing and coaxial with the elongated hollow member.
  • the magnetic blocks are provided with recessed portions into which the ends of the oathode extend so that cooling of the ends of the oathode is reduced and substantially uniform electron emission from all portions of the cathode in juxtaposition to the anode is obtained.
  • Fig. 1 is an elevational view in perspective of a magnetron constructed in accordance with this invention, a portion of the enclosing vessel and the electrode structures being broken away to show details of construction more clearly;
  • Fig. 2 is an elevational view in section of the 1937, Serial No. 151,093
  • Fig. 3 is a view in cross-section along line 3--3 of Fig. 2;
  • Fig. 4 is an enlarged detail view mainly in section of one of the magnetic members and a portion of the cathode.
  • the electron discharge device there shown comprises an evacuated enclosing vessel l0 having an inwardly extending portion l l at one end to which a metallic collar i2 is hermetically sealed.
  • An elongated, hollow metallic member I! having a reduced portion I4 is sealed to the'collar l2 and provided with an outlet port or tubulation l5.
  • Disposed within the hollow member l3 and secured thereto is an elongated inlet tubulation or pipe l5, which preferably extends to immediately adjacent or into the reduced portion II.
  • a tubular eyelet ll, forming the anode element of the electron discharge device extends laterally through the reduced portion it adjacent the inner end thereof.
  • a suitable positive potential may be applied to the anode through a leading-in conductor l8 affixed to the hollow metallic member l3.
  • cooling medium such, for example, as water may be circulated in the hollow member l3 and about the eyelet l1 so that the anode is maintained at a relatively low and safe temperature and, hence, is capable of handling large currents.
  • the semi-cylindrical members are of non-magnetic material.
  • Each of these members is provided with an aperture 21, in alignment with the anode eyelet l1, into which suitable strongly and oppositely magnetized end members or blocks 22 extend, the apertures 2i preferably being sufficiently large to prevent contact between the magnetic blocks 22 and the semi-cylinders 2
  • each of the magnetic blocks 22 has a recess 25 in the inner end thereof and an enlarged head portion 26 against which the springs 23 bear.
  • the magnetic blocks 22 are so mounted that the inner ends thereof are in proximity to the ends of the anode eyelet ll.
  • the filament 21 is held under tension by the springs 23 so that the linearity thereof and the desired coaxial relation of the cathode and anode are maintained.
  • the cathode may be energized from a suitable battery, not shown, connected to the conductors i9.
  • the magnetic blocks 22 may be highly magnetized so that an intense highly concentrated magnetic field parallel to the cathode and between the cathode and the anode is achieved.
  • This field may be augmented, if desired, through the agency of an external magnet having poles 28 adjacent the vessel Ill and in alignment with the cathode 21.
  • the field produced by the external magnet may be varied in accordance with a signal to modulate the current flowing between the anode I1 and cathode 21.
  • the blocks or members 22 may be normally unmagnetized but of a material having a relatively high permeability. In this case the magnetic field is provided entirely by the external magnet.
  • the high frequency oscillating field produced by the magnetron will be confined substantially between the semi-cylinders 20 and the cylindrical member l3, l4, and an output current corresponding thereto may be obtained in a suitable conductor 29 disposed adjacent the upper end of the vessel [0.
  • the magnetron may be mounted within a dielectric guide or the outer conductor of a coaxial conductor transmission line, and the high frequency fields propagated along the guide or transmission line. In such case, it will be appreciated that a close and efficient coupling between the oscillation generator, i. e., the magnetron, and the transmission system may be obtained.
  • An electron discharge device comprising an enclosing vessel, an anode, an elongated cathode in cooperative relation with said anode, and magnetic members within said vessel and adjacent the ends of said cathode.
  • An electron discharge device comprising an enclosing vessel, a tubular anode within said vessel, a linear cathode within said anode and substantially coaxial therewith, and a pair of magnetized members adjacent opposite ends of said anode for producing a magnetic field adjacent and parallel to said cathode.
  • An electron discharge device comprising an anode, a filamentary cathode in cooperative re lation therewith, and means supporting said cathode including magnetic members ailixed to the ends of said cathode and resilient means mounting said magnetic members.
  • An electron discharge device comprising a linear filamentary cathode, an anode encompassing said cathode, magnetized members aflixed to the ends of said cathode, and elongated resilient strips supporting said magnetic members and biased to tension said cathode.
  • An electron discharge device comprising an enclosing vessel, an elongated hollow member extending into said vessel, a tubular metallic eyelet constituting an electrode element extending laterally through said hollow member adjacent the inner end thereof, a cathode extending through said eyelet, and inlet and outlet ports for said hollow member whereby a cooling medium may be circulated through said member and about said eyelet.
  • An electron discharge device comprising an anode structure including an elongated metallic cylindrical member, a cathode in cooperative relation with said anode structure, a pair of semicylindrical metallic members on opposite sides of said cylindrical member and substantially coaxial therewith, and resilient means carried by said semi-cylindrical members for supporting said cathode.
  • An electron discharge device comprising an anode structure including a cylindrical member and a tubular eyelet extending transversely through said member adjacent one end thereof, a filamentary cathode extending through said eyelet, a pair of opposed, metallic semi-cylindrical supports on opposite sides of said cylindrical member and substantially coaxial therewith, and a pair of cantilever springs mounted on said supports and connected to the ends of said cathode.
  • an incandescible cathode and supporting means for said cathode including members affixed to the ends of said cathode and surrounding and spaced from said ends.
  • An electron discharge device comprising a tubular anode, a cathode extending through and beyond the ends of said anode, and supporting means engaging said cathode, said means including members having a tubular portion surrounding the ends of said cathode and extending into proximity to the ends of said anode.
  • An electron discharge device comprising a tubular anode, a linear filamentary cathode extending through and beyond the ends of said anode, magnetic members aflixed to the ends of said cathode and having a recessed portion surrounding and spaced from said cathode adjacent the ends thereof, and resilient means supporting said magnetic members and maintaining said cathode under tension.
  • An electron discharge device comprising an anode structure including a tubular member and a tubular eyelet extending transversely through said tubular member, a cathode extending through said eyelet, metallic supporting members on opposite sides of said tubular member and each having an aperture therein in alignment with said cathode, resilient strips carried by said supporting members, and means extending through said apertures, connecting said strips to said cathode.
  • a magnetron comprising an enclosing vessel, a cathode, an anode in cooperative relation with said cathode, a pair of magnetic members at the ends of said cathode and within said vessel, and magnetic means external to said vessel ineluding pole-pieces in juxtaposition to said magnetic members.
  • a magnetron comprising an enclosing vessel, a hollow, cylindrical metallic member extending into said vessel and sealed to one end thereof, a tubular eyelet extending laterally through said cylindrical member, a pair of opposed, metallic semi-cylindrical members on opposite sides of said cylindrical member and coaxial therewith, said seml-cylindical members having apertures in alignment with said eyelet, a cathode extending through said eyelet, magnetic members aiflxed to the ends of said cathode and extending through said apertures,-and cantilever springs outside of said semi-cylindrical members and aflixed thereto, said springs supporting said magnetic members.
  • a magnetron comprising an enclosing vessel, a hollow, cylindrical metallic member extending into said vessel and sealed to one end thereof, a tubular eyelet extending laterally through said cylindrical member, a pair of opposed, metallic semi-cylindrical members on opposite sides of said cylindrical member and coaxial therewith, said seml-cylindical members having apertures in alignment with said eyelet, a cathode extending through said eyelet, magnetic members aiflxed to the ends of said cathode and extending through said apertures,-and cantilever springs outside of said semi-cylindrical members and aflixed thereto, said springs supporting said magnetic members.

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US151093A 1937-06-30 1937-06-30 Electron discharge device Expired - Lifetime US2130510A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US151093A US2130510A (en) 1937-06-30 1937-06-30 Electron discharge device
GB16777/38A GB497138A (en) 1937-06-30 1938-06-03 Electron discharge devices
NL88571A NL64997C (en:Method) 1937-06-30 1938-06-28
FR839910D FR839910A (fr) 1937-06-30 1938-06-28 Dispositifs à décharge électronique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US151093A US2130510A (en) 1937-06-30 1937-06-30 Electron discharge device

Publications (1)

Publication Number Publication Date
US2130510A true US2130510A (en) 1938-09-20

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ID=22537286

Family Applications (1)

Application Number Title Priority Date Filing Date
US151093A Expired - Lifetime US2130510A (en) 1937-06-30 1937-06-30 Electron discharge device

Country Status (4)

Country Link
US (1) US2130510A (en:Method)
FR (1) FR839910A (en:Method)
GB (1) GB497138A (en:Method)
NL (1) NL64997C (en:Method)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431139A (en) * 1943-06-23 1947-11-18 Westinghouse Electric Corp Magnetron
US2437880A (en) * 1945-07-09 1948-03-16 Us Sec War Cathode support structure
US2452786A (en) * 1946-02-18 1948-11-02 Harry T O'neill Cathode structure
US2460119A (en) * 1944-09-23 1949-01-25 Gen Electric Magnetron
US2489872A (en) * 1946-02-27 1949-11-29 Gen Electric Envelope and electrode mounting structure for electric discharge devices
US2532956A (en) * 1946-12-31 1950-12-05 Jr John A Simpson Air proportional counter
US2649553A (en) * 1950-09-02 1953-08-18 Bell Telephone Labor Inc Filamentary cathode support structure
US2809328A (en) * 1951-11-08 1957-10-08 Raytheon Mfg Co Magnetron amplifiers

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431139A (en) * 1943-06-23 1947-11-18 Westinghouse Electric Corp Magnetron
US2460119A (en) * 1944-09-23 1949-01-25 Gen Electric Magnetron
US2437880A (en) * 1945-07-09 1948-03-16 Us Sec War Cathode support structure
US2452786A (en) * 1946-02-18 1948-11-02 Harry T O'neill Cathode structure
US2489872A (en) * 1946-02-27 1949-11-29 Gen Electric Envelope and electrode mounting structure for electric discharge devices
US2532956A (en) * 1946-12-31 1950-12-05 Jr John A Simpson Air proportional counter
US2649553A (en) * 1950-09-02 1953-08-18 Bell Telephone Labor Inc Filamentary cathode support structure
US2809328A (en) * 1951-11-08 1957-10-08 Raytheon Mfg Co Magnetron amplifiers

Also Published As

Publication number Publication date
FR839910A (fr) 1939-04-14
GB497138A (en) 1938-12-13
NL64997C (en:Method) 1950-01-16

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