US2504970A - Electron discharge device - Google Patents

Electron discharge device Download PDF

Info

Publication number
US2504970A
US2504970A US620143A US62014345A US2504970A US 2504970 A US2504970 A US 2504970A US 620143 A US620143 A US 620143A US 62014345 A US62014345 A US 62014345A US 2504970 A US2504970 A US 2504970A
Authority
US
United States
Prior art keywords
anode
magnetron
sleeve
segments
cathode
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
US620143A
Other languages
English (en)
Inventor
Herbert F Engelmann
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.)
STC PLC
Federal Telephone and Radio Corp
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to US620143A priority Critical patent/US2504970A/en
Priority to GB28303/46A priority patent/GB616871A/en
Priority to FR1104001D priority patent/FR1104001A/fr
Priority to ES0179740A priority patent/ES179740A1/es
Priority to BE480478D priority patent/BE480478A/xx
Application granted granted Critical
Publication of US2504970A publication Critical patent/US2504970A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01J25/54—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 only one cavity or other resonator, e.g. neutrode tubes
    • H01J25/56—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 only one cavity or other resonator, e.g. neutrode tubes with interdigital arrangements of anodes, e.g. turbator tube

Definitions

  • Fig. l is a lengthwise sectioned view oi?
  • my novel magnetron tube and itsV mountingand Fig; 2 ⁇ is a horizontal section taken on line 2 ⁇ -2
  • the cnveiope for the electrodes comprisesr glass annulii a hermeticallfy sealed to the metal parts of the tube.
  • An exhaust tubulation S may ce joined to one of the glassportions for exhaustingenti sealing the envelope.
  • miv novel magnetron comprises a rigid metal sleeve or Vtube 'exteriorly sensitized with electron emittingl material and adaptedfor ine direct heating with an interiory heatngccv IU.
  • two lead-in conductors' l I v may suffice for the cathode and itsheater.
  • the lead-ins are' sealed through a glassbutton-type header I2; If additional support.
  • a 'stud may be attachedtothe sleeve and embedded-'in the header; ⁇ Since the diameter of tliecathode' is relatively large; the ends of the sleeve are V'preferably ⁇ closed to conserve heat and preventrandorrr electron emission from the coil.
  • the magnetron ⁇ ancdes each comprise an al1-'- nulus having spaced opstanding integral projectionsor'segments along'the inner periphery of theannulus opposite the cathode.
  • The. inner peripheries ⁇ oi ⁇ the annuli are of the. same diameter so that thefanode vsegments may interleave andi lie in' acomm'on circular surface.
  • the outer ends of the magnetic Stoppers are preferably machined and polished to make good 4 a point of voltage maximum to couple the oscillator with its load circuit.
  • the tubes I5 and IB could of course be extended into the endless conductors of a coaxial cable.
  • the anode voltage and the magnetic field strength are preferably adjusted so that space current cut-oir just occurs, whereupon the electrons bunch and travel in circular paths about the cathode in planes substantially perpendicular to the axial line of the tube.
  • Such an orbit carries the electrons successively past the segments of anodes Zand 3, and as the electron transit time between segments approaches the resonant fre- "j quency of the .connected tank circuit I5-I6, the
  • vvoltage induced in one set of segments, 4 becomes 180 degrees ldisplaced from the voltage induced contact with the ends of the yoke.
  • One leg of the l yoke may be hinged as at 2l to permit easy replacement of the tube.
  • the stopper in the lower or base end of the envelope is-ccnveniently annular in shape to accommodate the insulating header and the cathode leads, and to shape the magnetic eld to the annular anode-cathode space.
  • the inner face of the upper stopper may be recessed to provide a rim opposite and complementary to the end'of the lower stopper. Accordingly, the pole pieces of my improved magnetron may be brought elose'to the discharge space to accurately localize the eld in the space. Less magnetizing power is required for a given eld strength in the gap and less disturbance of the field is possible from extraneous sources.
  • My improved magnetron is simple and inexpensive to make, being adapted to the manufacturing technique of the conventional radio receiving tube.
  • the header is rst press molded in the lower stopper with the cathode leads.
  • the cathode sleeve is then assembled with its heater coil and their two connections spot welded to the inner ends of the leads.
  • This subassembly may then be telescoped with the glass rings 6, 1 and 8 and metal annuli I3 and I4, conventional jigs being used for accurately spacing and holding the parts in alignment while the rims of the glass rings are melted and sealed to the adjacent metal surfaces.
  • the stopper-s are of iron, it may be expeditious to make the glasstoiron seals with pleated copper rings 22, which are feathered along one edge for the glass seal, the other edge being easily brazed vacuum tight to the iron.
  • Piston 23, with spring lingers, may be slid along the annular cavity with piston rods 24. Since one current maxima is at lthe short circuited end of the line, a current pick up coil 25 may be carried on the piston and exteriorly connected by means of twisted conductors in the piston rod. Alternatively, a capacity probe, notshown, may be inserted into the cavity at, say,
  • each segment of either ariode' delivers in-phase power to the adjacent end of the concentric line, I5 or I6.
  • the number of segments per anode or the size of the anodes are not limited by any particular mode of oscillation, and, in fact, as the anode is made larger, with more segments, the anode supply voltage becomes proportionately less. Further, because of the low impedance of the connections between the segments-and the resonant chamber, the decrements of the circuits are low and the electric coupling is close between the anodes and frequency determining means. Accordingly, the oscillator may be tuned by the piston 23 over a wide range of frequencies without loss of control of the electron oscillations.
  • My invention extends the power range of the magnetron by permitting the use of a large indirectly heated cathode without disproportionately increasing the anode voltage.
  • My magnetron can be manufactured inexpensively, yet with close tolerances, even in the magnetic circuit.
  • the built-in magnetic gap insures stable operation, and uniform characteristics as between tubes. Stability, further, flows from my novel way of electrically joining the anode segments to eliminate unwanted phase diiierences.
  • An electron discharge device comprising an indirectly heatedpcathode sleeve, a flat metal annulus disposed in a planev normal to the axis of said sleeve, a second annulus with a larger outer peripheral diameter parallel to and spaced from the iirst mentioned annulus, each annulus having integral upstanding projections along its inner periphery and mounted in a cylindrical'surface concentric with the surface of said ⁇ sleeve, the projections of one annulus alternating, circumferentially, with theY projections of the other ⁇ annulus, cylindrical Stoppers of 'magnetic material coaxial with said sleeve and closely disposed to opposite sides of the annulur space between said sleeve and said projections, and insulating envelope wall portions hermetically sealed between -the faces ofv said annuli-andthe sides of said Stoppers f 2.

Landscapes

  • Control Of High-Frequency Heating Circuits (AREA)
  • Microwave Tubes (AREA)
US620143A 1945-10-03 1945-10-03 Electron discharge device Expired - Lifetime US2504970A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US620143A US2504970A (en) 1945-10-03 1945-10-03 Electron discharge device
GB28303/46A GB616871A (en) 1945-10-03 1946-09-20 Improvements in or relating to electron discharge devices
FR1104001D FR1104001A (fr) 1945-10-03 1947-08-05 Appareils à décharge électronique du type magnétron
ES0179740A ES179740A1 (es) 1945-10-03 1947-09-16 MEJORAS EN DISPOSITIVOS DE DESCARGA ELECTRoNICO
BE480478D BE480478A (en:Method) 1945-10-03 1948-02-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US620143A US2504970A (en) 1945-10-03 1945-10-03 Electron discharge device

Publications (1)

Publication Number Publication Date
US2504970A true US2504970A (en) 1950-04-25

Family

ID=24484763

Family Applications (1)

Application Number Title Priority Date Filing Date
US620143A Expired - Lifetime US2504970A (en) 1945-10-03 1945-10-03 Electron discharge device

Country Status (5)

Country Link
US (1) US2504970A (en:Method)
BE (1) BE480478A (en:Method)
ES (1) ES179740A1 (en:Method)
FR (1) FR1104001A (en:Method)
GB (1) GB616871A (en:Method)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565387A (en) * 1946-10-31 1951-08-21 Sylvania Electric Prod Interdigital magnetron
US2648800A (en) * 1949-12-02 1953-08-11 Collins Radio Co Double parallel plane magnetron
US2816248A (en) * 1950-03-04 1957-12-10 Sylvania Electric Prod Tunable interdigital magnetrons

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1121739B (de) * 1956-07-26 1962-01-11 Gen Electric Schlitzanoden-Magnetronroehre mit einem kreiszylindrischen interdigitalen Anodensystem

Citations (11)

* 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
US2135006A (en) * 1936-04-21 1938-11-01 Philips Nv Rectifying device
US2250698A (en) * 1937-12-10 1941-07-29 Csf Magnetron
US2352657A (en) * 1941-06-09 1944-07-04 Teletype Corp Electromagnetically controlled thermionic relay
US2395043A (en) * 1941-12-02 1946-02-19 Standard Telephones Cables Ltd Electron discharge device
US2408236A (en) * 1941-12-17 1946-09-24 Raytheon Mfg Co Magnetron casing
US2409222A (en) * 1941-07-19 1946-10-15 Bell Telephone Labor Inc Electron discharge device
US2421636A (en) * 1944-05-29 1947-06-03 Gen Electric Tunable magnetron
US2424886A (en) * 1942-12-29 1947-07-29 Rca Corp Magnetron
US2428888A (en) * 1946-04-15 1947-10-14 Gen Electric High-frequency electric discharge device
US2432466A (en) * 1946-11-29 1947-12-09 Sylvania Electric Prod Interdigital magnetron

Patent Citations (11)

* 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
US2135006A (en) * 1936-04-21 1938-11-01 Philips Nv Rectifying device
US2250698A (en) * 1937-12-10 1941-07-29 Csf Magnetron
US2352657A (en) * 1941-06-09 1944-07-04 Teletype Corp Electromagnetically controlled thermionic relay
US2409222A (en) * 1941-07-19 1946-10-15 Bell Telephone Labor Inc Electron discharge device
US2395043A (en) * 1941-12-02 1946-02-19 Standard Telephones Cables Ltd Electron discharge device
US2408236A (en) * 1941-12-17 1946-09-24 Raytheon Mfg Co Magnetron casing
US2424886A (en) * 1942-12-29 1947-07-29 Rca 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
US2432466A (en) * 1946-11-29 1947-12-09 Sylvania Electric Prod Interdigital magnetron

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2565387A (en) * 1946-10-31 1951-08-21 Sylvania Electric Prod Interdigital magnetron
US2648800A (en) * 1949-12-02 1953-08-11 Collins Radio Co Double parallel plane magnetron
US2816248A (en) * 1950-03-04 1957-12-10 Sylvania Electric Prod Tunable interdigital magnetrons

Also Published As

Publication number Publication date
GB616871A (en) 1949-01-27
BE480478A (en:Method) 1949-08-19
FR1104001A (fr) 1955-11-15
ES179740A1 (es) 1947-11-01

Similar Documents

Publication Publication Date Title
US2619611A (en) Electron tube apparatus
US2422465A (en) High-frequency magnetrons
US2311520A (en) Coupling loop
US2412824A (en) Magnetron
US2128236A (en) Vacuum discharge tube
US2994009A (en) High frequency tube apparatus
US2445993A (en) Cathode structure
US2788465A (en) Traveling wave electron discharge device
US2128235A (en) Vacuum discharge tube
US2984762A (en) Electron beam tube and magnetic circuitry therefor
US2504970A (en) Electron discharge device
US2521364A (en) Electron discharge device for high frequency
US2473567A (en) Electronic discharge device
US2428193A (en) Magnetron
US2416899A (en) Electronic discharge device of the magnetron type
US2446017A (en) Ultra high frequency electric discharge device and cavity resonator apparatus therefor
US2443179A (en) Electrical apparatus
US2523049A (en) Water-cooled multicircuit magnetron
US2130510A (en) Electron discharge device
US2412998A (en) Electron discharge device
US2450629A (en) Ultra high frequency magnetron generator
US2420314A (en) High-frequency resonator-tube
US2478644A (en) Electrical discharge device of the magnetron type
US2459030A (en) Tunable magnetron
US2125279A (en) Electron discharge device