US2456888A - Magnetron - Google Patents

Magnetron Download PDF

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Publication number
US2456888A
US2456888A US473829A US47382943A US2456888A US 2456888 A US2456888 A US 2456888A US 473829 A US473829 A US 473829A US 47382943 A US47382943 A US 47382943A US 2456888 A US2456888 A US 2456888A
Authority
US
United States
Prior art keywords
anode
strap
partitions
cavity
recess
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
US473829A
Other languages
English (en)
Inventor
Ernest C Okress
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 BE478795D priority Critical patent/BE478795A/xx
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US473829A priority patent/US2456888A/en
Priority to GB31076/47A priority patent/GB631084A/en
Priority to FR989241D priority patent/FR989241A/fr
Application granted granted Critical
Publication of US2456888A publication Critical patent/US2456888A/en
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
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/18—Resonators
    • H01J23/22—Connections between resonators, e.g. strapping for connecting resonators of a magnetron
    • 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

Definitions

  • the reference charactions in magnetrons in order to operate in the ter Ill designates the anode body portion of the N magnetron shown as of metal and of a generally cylindrical configuration. This body portion is provided at its exterior with opposite longitudip s mode more t v y t having been n nal end flanges. projecting above and below the.
  • the anode body is hollowed longitudinally sec y p e
  • These deslderatums are with a middle or coaxial cavity M from which tirely lacking in the P r art method of pradiate resonant cavities I5 separated by parti- P niegnetlons. that their accomplishment ac tions it of equal length and symmetric in shape Constitutes e p y bject of the pr se t and disposition. The ends of these several par-.
  • inventiontitions are in a common plane and it is those p y, an object Of the v t on s t ends which constitute the ends of the anode body Provide a One-Piece Strap at One end of the and those planes which constitute the endplanes netron which is duplicated by a like Strep at the 25 of the anode body. While the particular radiatother end thereof.
  • ing cavities l5 are shown herein as each having Anot er O ject o the invention is o aveid a slot formation next the middle cavity M which possibility o inadvertent Contact of the strap outwardly expands into a cylindrical formation, with an interve pa tit o o te ing the invention is not confined to that structure, partitions. 3i).
  • Another object of the invention is to keep the icted inprior application (of which an a m st pp g means from p uding above the end is my application Ser. No. 460,376, filed October; pl e o the several partitions or a de body. 1,1942, and assigned t the same assignee as the. generally, to e-VOid fi nt capacity effects present one) may be used and the present invenin different magnetrons by the strapping means. tion'applied thereto.
  • St l furt r O j of the invention Will l End spaces iii are utilized, inter alia, forintrop s the description Proceeds b by direct duction radially thereof, appropriate lead-in ecita i thereof and y implication o the wires H for a filament l8 here shown utilized co teXtfor heating a cylindrical cathode l9 coaxiallydis- Referring to t e acco p y drawings n -10 posed within the middle cavity Id.
  • the cathode which like numerals of reference indicate simihas a length substantially the axial length of the: lar parts throughout the several views: anode body and opposite the ends of the cathode
  • Figure 1 is a sectional plan of a magnetron arediscs 20 spaced beyond the end planes of the taken immediately below a cover plate thereof as anode and carried by insulators 2
  • Each said disc forms a con- Figure 2 is a vertical cross section of the magnection between the respective lead-in wire and netron on a diametric line II-II of Fig. 1; filament-end situated in the particular end space Figure 3 is a section on larger scale than Fig.
  • Figure 4 is a perspective view of the two straps any desired energy transfer means has a sealed with projected relation of the straps to each other connection through the outer wall of the body shown in dotted lines; and ortion into one of the radiating cavities 15,-saidloop being shown in the arbitrarily selected disclosure as in a cavity 90 displaced from the filament lead-in connections, but other selection of cavity in which to position the said loop may be made provided the probed portion is satisfactory for this arrangement.
  • the. cavity. in which the,, ,1oop located will be referredijto .as the outputycavity.
  • stepped recess providing what may be identified as a p step 3 (see Fig. 3) and a shallow stem-1':
  • the deeper step being for clearance purposes dered Withouthindrance by any parts of the deand the shallower step being for mountingiajs'trapp 25 therein.
  • the shallow step 24 has. great'eridi; ameter than the deeper step and between steps is a cylindrical part constituting a 'riser zfii The" vice .i'n-iront of. such place of soldering. Only a verysmallportionof the effective anode surface is removed in making the stepped recess for acccmmoda'ting the: strap, the shallow step preferstrap 25 mentioned has portions thereof. resting on the shallow step 2 3 ofalternate partitions and other.
  • Furt'liermore; capacity loading-between t'l'i'e-strapand thepartitions bridged over without connection" thereto can be accurately controlled in manufa 'c ture; and is not lef t' to jud'gment of the operator assembling-the device:
  • a strapped anode-fora magnetron compris-- ing an anode -b'od'y* providing plurality of radiating partitions"the-longitudinal ends whereof are inoo'mmon planes and form the end plane of the anode; sai'd'anode having ai-circul'ar recess in the end thereof; said re'cess li'eing -steppedso as tobe deeper next one periphery oftlie recesstlfanithe other, and astrap overlying the deeper-fparti ofi said reeess outlof centactfit'h'ereat from the anode, said strap having projections in the loser deem part of the: recess andsin: contact:- with; and: sup portedtby selected?
  • a strappedi anode for: aimagnetron' comprise ing an anode body providing aipluraiity' ofi radi ating tpartitionsstheslongitudinal endsiwhere'ofare inzcommon planes: and format'he' endiplan'e ofTit-heanode; saidranodeinaviing a circulars-recessIinithe' end thereof and next the radially inwardemargin of'fsaid :partiti'ons; said-:recess being-i ,steppedtso/ as t'ozbe deeper;nextpnerp'eriphery'ofthe recess than: th'eother; andta strapi overly-ingsthe deeper part of said recess; out of contactsv thereat from the: anode; saidstrap havingprojections invt'he-lessi deep pillfi the" recess extending to the periphcryof"
  • a strapped anode for a magnetron comprise ing anLa-nod'e body: providing aipluralityl offra'diatingpartitions the-longitudinal endsi'whereof are in common:planesiandiform .theendiplane of. the. anode, said anodehavingrar circular recessin:;.the end thereof-and nexttthe: radiallyainward margin:- of said partitions, said recess1being;stepped with a; deeper.
  • a strapped anode :fon eta-magnetron comprise ing an anode body providing a plurality of radiating partitions the longitudinal ends whereof are in common planes and form the end planes of the anode, said anode having a circular recess in the end thereof, said recess being stepped so as to be deeper next one periphery of the recess than the other, and a substantially flat strap having thickness approximating the depth of the outermost part of said recess and an outer diameter less than the inner diameter of said outermost part and having radially outward projections projecting into and applied flatwise upon said outermost part, whereby said strap is in the said end plane of the anode overlying the deeper part of the said recess and making sole contact with the anode by support of said projections on the outermost part of selected ones of said partitions.
  • a magnetron comprising an anode having a longitudinal cylindrical cavity for the cathode, a cathode in said cavity, a ring-like strap having an inside diameter substantially equal to the diameter of the cylindrical cathode cavity, said anode providing partitions radiating from said cathode cavity, and said strap having half as many projections thereon as there are partitions, i
  • said projections making contact with an equal number of partitions and constituting the only contacting portions of the said strap with the anode.
  • a magnetron comprising an anode having a longitudinal cylindrical cavity for the cathode, a cathode in said cavity, a ring-like strap having an inside diameter substantially equal to the diameter of the cylindrical cathode cavity, said anode providing partitions radiating from said cathode cavity, and said strap having half as many projections thereon as there are partitions, said projections making contact with an equal number of partitions and constituting the only contacting portions of the said strap with the anode, and each said projection having a length in a direction circumferentially of the ring equal to the thickness of the part of the partition where said projection contacts said partition.

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  • Microwave Tubes (AREA)
US473829A 1943-01-28 1943-01-28 Magnetron Expired - Lifetime US2456888A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE478795D BE478795A (fr) 1943-01-28
US473829A US2456888A (en) 1943-01-28 1943-01-28 Magnetron
GB31076/47A GB631084A (en) 1943-01-28 1947-11-24 Improvements in or relating to magnetrons
FR989241D FR989241A (fr) 1943-01-28 1948-02-02 Perfectionnements aux magnétrons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US473829A US2456888A (en) 1943-01-28 1943-01-28 Magnetron

Publications (1)

Publication Number Publication Date
US2456888A true US2456888A (en) 1948-12-21

Family

ID=23881170

Family Applications (1)

Application Number Title Priority Date Filing Date
US473829A Expired - Lifetime US2456888A (en) 1943-01-28 1943-01-28 Magnetron

Country Status (4)

Country Link
US (1) US2456888A (fr)
BE (1) BE478795A (fr)
FR (1) FR989241A (fr)
GB (1) GB631084A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559604A (en) * 1944-03-29 1951-07-10 Rca Corp Electron discharge device
US3875469A (en) * 1972-12-20 1975-04-01 Hitachi Ltd Anode structure for magnetron
US4205257A (en) * 1977-09-07 1980-05-27 Hitachi, Ltd. Magnetron strap ring structure

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5146136A (en) * 1988-12-19 1992-09-08 Hitachi, Ltd. Magnetron having identically shaped strap rings separated by a gap and connecting alternate anode vane groups
GB9118593D0 (en) * 1991-08-30 1991-10-16 Eev Ltd Magnetron

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB445084A (en) * 1934-08-21 1936-04-02 Telefunken Gmbh Improvements in or relating to electron discharge devices
US2063342A (en) * 1934-12-08 1936-12-08 Bell Telephone Labor Inc Electron discharge device
US2069867A (en) * 1934-12-29 1937-02-09 Bell Telephone Labor Inc Electron emitter
US2128237A (en) * 1934-12-24 1938-08-30 Pintsch Julius Kg Vacuum discharge tube
US2147159A (en) * 1937-04-17 1939-02-14 Cie Generale De Telegraphic Sa Magnetron oscillator and detector
US2154758A (en) * 1935-02-28 1939-04-18 Pintsch Julius Kg Electronic tube
US2163157A (en) * 1937-07-22 1939-06-20 Bell Telephone Labor Inc Electron discharge apparatus
US2167201A (en) * 1935-06-28 1939-07-25 Pintsch Julius Kg Electron tube
US2201216A (en) * 1936-01-24 1940-05-21 Lorenz C Ag Electron tube
CH215600A (de) * 1938-08-12 1941-06-30 Bbc Brown Boveri & Cie Anordnung mit einer Magnetronröhre.
US2417789A (en) * 1941-12-01 1947-03-18 Raytheon Mfg Co Magnetron anode structure

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB445084A (en) * 1934-08-21 1936-04-02 Telefunken Gmbh Improvements in or relating to electron discharge devices
US2063342A (en) * 1934-12-08 1936-12-08 Bell Telephone Labor Inc Electron discharge device
US2128237A (en) * 1934-12-24 1938-08-30 Pintsch Julius Kg Vacuum discharge tube
US2069867A (en) * 1934-12-29 1937-02-09 Bell Telephone Labor Inc Electron emitter
US2154758A (en) * 1935-02-28 1939-04-18 Pintsch Julius Kg Electronic tube
US2167201A (en) * 1935-06-28 1939-07-25 Pintsch Julius Kg Electron tube
US2201216A (en) * 1936-01-24 1940-05-21 Lorenz C Ag Electron tube
US2147159A (en) * 1937-04-17 1939-02-14 Cie Generale De Telegraphic Sa Magnetron oscillator and detector
US2163157A (en) * 1937-07-22 1939-06-20 Bell Telephone Labor Inc Electron discharge apparatus
CH215600A (de) * 1938-08-12 1941-06-30 Bbc Brown Boveri & Cie Anordnung mit einer Magnetronröhre.
US2417789A (en) * 1941-12-01 1947-03-18 Raytheon Mfg Co Magnetron anode structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559604A (en) * 1944-03-29 1951-07-10 Rca Corp Electron discharge device
US3875469A (en) * 1972-12-20 1975-04-01 Hitachi Ltd Anode structure for magnetron
US4205257A (en) * 1977-09-07 1980-05-27 Hitachi, Ltd. Magnetron strap ring structure

Also Published As

Publication number Publication date
GB631084A (en) 1949-10-26
FR989241A (fr) 1951-09-06
BE478795A (fr)

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