US3465201A - Magnetron casing - Google Patents

Magnetron casing Download PDF

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Publication number
US3465201A
US3465201A US626300A US3465201DA US3465201A US 3465201 A US3465201 A US 3465201A US 626300 A US626300 A US 626300A US 3465201D A US3465201D A US 3465201DA US 3465201 A US3465201 A US 3465201A
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United States
Prior art keywords
magnetron
anode block
envelope
casing
cup
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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
US626300A
Inventor
Eduard G Dorgelo
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US Philips Corp
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US Philips Corp
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Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3465201A publication Critical patent/US3465201A/en
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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

Definitions

  • the invention relates to a magnetron and more particularly to a magnetron casing in intimate contact with an anode block for efficiently conducting heat away from the anode block.
  • the magnetron illustrated comprises an envelope constituted by two cups 1, 2 of thin non-magnetic material, preferably soft copper or other ductile, good heat-conducting material separated by a stainless steel spacer or sleeve 3. Within the envelope are magnetic pole-pieces 4, of iron and a copper anode block 6, which is supported by sleeve 3.
  • Pole pieces 4 and 5 are in intimate contact with and held securely by cups 1, 2 as a result of a pressure differential between the evacuated interior of the envelope and the sleeve 3 which fits over the ends of the cups.
  • a helically wound cathode 7 provided with molybdenum end hats 8, 9 is supported in the central space of I 3,465,2M Patented Sept. 2, 1969 ice the anode block 6 by a pair of lead-in conductors 10, 11.
  • a lead-in conductor 12 is provided for the anode block.
  • the magnetron according to the invention is easy to assemble, dissipates heat effectively because of the intimate contact 'between the anode block and the envelope, and has a more effective magnetic field because the polepieces are supported within the envelope thereby reducing the gap-length between them.
  • a magnetron comprising a hollow evacuated envelope including a pair of cup-shaped members having a relatively thin wall deformable by atmospheric pressure, an anode block between the peripheral edges of said cupshaped members, a pole piece within and supported by each of said cup-shaped members spaced from said anode block, and a cylindrical spacer member of a thin, nonmagnetic, relatively hard material supported by said anode block and separating said cup-shaped members.
  • cup-shaped members consist of a good heat-conducting material.

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  • Microwave Tubes (AREA)

Description

P 2, 1969 E. G. DORGELO 3,465,201
MAGNETRON CASING Filed March 27. 1967 INVENTOR. EDUARD 5. DORGELO AGENT United States Patent 3,465,201 MAGNETRON CASING Eduard G. Dorgelo, Huntington, N.Y., assignor, by mesne assignments, to U.S. Philips Corporation, New York, N.Y., a corporation of Delaware Filed Mar. 27, 1967, Ser. No. 626,300 int. Cl. H013 25/50 US. Cl. 315-3951 4 Claims ABSTRACT OF THE DISCLQSURE The invention relates to a magnetron and more particularly to a magnetron casing in intimate contact with an anode block for efficiently conducting heat away from the anode block.
The invention will be best understood from the following description of an exemplification thereof, reference being had to the accompanying drawing in which the sole figure is a sectional view of a magnetron according to the invention.
The magnetron illustrated comprises an envelope constituted by two cups 1, 2 of thin non-magnetic material, preferably soft copper or other ductile, good heat-conducting material separated by a stainless steel spacer or sleeve 3. Within the envelope are magnetic pole-pieces 4, of iron and a copper anode block 6, which is supported by sleeve 3.
Pole pieces 4 and 5 are in intimate contact with and held securely by cups 1, 2 as a result of a pressure differential between the evacuated interior of the envelope and the sleeve 3 which fits over the ends of the cups.
A helically wound cathode 7 provided with molybdenum end hats 8, 9 is supported in the central space of I 3,465,2M Patented Sept. 2, 1969 ice the anode block 6 by a pair of lead-in conductors 10, 11. A lead-in conductor 12 is provided for the anode block.
The magnetron according to the invention is easy to assemble, dissipates heat effectively because of the intimate contact 'between the anode block and the envelope, and has a more effective magnetic field because the polepieces are supported within the envelope thereby reducing the gap-length between them.
While the invention has been disclosed with reference to a specific embodiment thereof, other modifications will be apparent to those skilled in the art without departing from the spirit and scope of the invention which is defined in the appended claims.
What is claimed is:
1. A magnetron comprising a hollow evacuated envelope including a pair of cup-shaped members having a relatively thin wall deformable by atmospheric pressure, an anode block between the peripheral edges of said cupshaped members, a pole piece within and supported by each of said cup-shaped members spaced from said anode block, and a cylindrical spacer member of a thin, nonmagnetic, relatively hard material supported by said anode block and separating said cup-shaped members.
2. A magnetron as claimed in claim 1, in which the cup-shaped members consist of a good heat-conducting material.
3. A magnetron as claimed in claim 2, in which the cup-shaped members consist of soft copper.
4. A magnetron as claimed in claim 3, in which the spacer members consists of stainless steel.
References Cited UNITED STATES PATENTS 9/1946 Spencer 313-158 X 8/1958 Crapuchettes 313-44 X US Cl. X.R.
US626300A 1967-03-27 1967-03-27 Magnetron casing Expired - Lifetime US3465201A (en)

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US62630067A 1967-03-27 1967-03-27

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4810355U (en) * 1971-06-17 1973-02-05
US3746916A (en) * 1971-04-26 1973-07-17 Hitachi Ltd Magnetrons
US3809950A (en) * 1972-02-18 1974-05-07 Tokyo Shibaura Electric Co Magnetron
US4066928A (en) * 1975-05-20 1978-01-03 U.S. Philips Corporation Resonant cavity magnetron having a helical cathode
US4075534A (en) * 1975-09-01 1978-02-21 Tokyo Shibaura Electric Co., Ltd. Magnetron with holding means to support a pair of permanent magnets
US5130601A (en) * 1990-03-14 1992-07-14 Litton Systems, Inc. Quick warm-up cathode heater for high average power magnetrons

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408236A (en) * 1941-12-17 1946-09-24 Raytheon Mfg Co Magnetron casing
US2849633A (en) * 1954-11-16 1958-08-26 Litton Industries Inc Magnetron

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408236A (en) * 1941-12-17 1946-09-24 Raytheon Mfg Co Magnetron casing
US2849633A (en) * 1954-11-16 1958-08-26 Litton Industries Inc Magnetron

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746916A (en) * 1971-04-26 1973-07-17 Hitachi Ltd Magnetrons
JPS4810355U (en) * 1971-06-17 1973-02-05
JPS525577Y2 (en) * 1971-06-17 1977-02-04
US3809950A (en) * 1972-02-18 1974-05-07 Tokyo Shibaura Electric Co Magnetron
US4066928A (en) * 1975-05-20 1978-01-03 U.S. Philips Corporation Resonant cavity magnetron having a helical cathode
US4075534A (en) * 1975-09-01 1978-02-21 Tokyo Shibaura Electric Co., Ltd. Magnetron with holding means to support a pair of permanent magnets
US5130601A (en) * 1990-03-14 1992-07-14 Litton Systems, Inc. Quick warm-up cathode heater for high average power magnetrons

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