GB2000633A - Microwave tubes incorporating rare earth magnets - Google Patents

Microwave tubes incorporating rare earth magnets

Info

Publication number
GB2000633A
GB2000633A GB7828369A GB7828369A GB2000633A GB 2000633 A GB2000633 A GB 2000633A GB 7828369 A GB7828369 A GB 7828369A GB 7828369 A GB7828369 A GB 7828369A GB 2000633 A GB2000633 A GB 2000633A
Authority
GB
United Kingdom
Prior art keywords
magnets
rare earth
earth magnets
microwave tubes
tubes incorporating
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.)
Granted
Application number
GB7828369A
Other versions
GB2000633B (en
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.)
Raytheon Co
Original Assignee
Raytheon 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
Application filed by Raytheon Co filed Critical Raytheon Co
Publication of GB2000633A publication Critical patent/GB2000633A/en
Application granted granted Critical
Publication of GB2000633B publication Critical patent/GB2000633B/en
Expired legal-status Critical Current

Links

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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • 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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/10—Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path

Landscapes

  • Microwave Tubes (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

Magnets 36 using rare earths (e.g. SmCo5) are more efficiently used by placing them inside the envelope of the microwave tube adjacent the location where a magnetic field is required, and shielding the magnets so that they do not heat above say 250 DEG C. The deterioration in magnetic properties with the magnets in a vacuum is much less than is observed when the magnets are in air (outside the envelope) and heated only to 125 DEG C. <IMAGE>
GB7828369A 1977-07-01 1978-06-29 Microwave tubes incorporating rare earth magnets Expired GB2000633B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81210077A 1977-07-01 1977-07-01

Publications (2)

Publication Number Publication Date
GB2000633A true GB2000633A (en) 1979-01-10
GB2000633B GB2000633B (en) 1982-02-17

Family

ID=25208501

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7828369A Expired GB2000633B (en) 1977-07-01 1978-06-29 Microwave tubes incorporating rare earth magnets

Country Status (4)

Country Link
JP (1) JPS5414151A (en)
CA (1) CA1120589A (en)
DE (1) DE2828873C2 (en)
GB (1) GB2000633B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259402A (en) * 1991-09-06 1993-03-10 Burle Technologies Thermally graded filament assembly
GB2259605A (en) * 1991-09-03 1993-03-17 Burle Technologies Magnetron with cooled pole piece

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0732265Y2 (en) * 1986-09-11 1995-07-26 株式会社東海理化電機製作所 Mirror body tilt adjustment mechanism for door mirrors

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3781592A (en) * 1972-06-08 1973-12-25 Raytheon Co Radial magnetized magnet
JPS5652425B2 (en) * 1973-12-27 1981-12-11
JPS5836452B2 (en) * 1974-02-08 1983-08-09 株式会社日立製作所 magnetron
JPS50129763A (en) * 1974-04-02 1975-10-14
JPS5747534B2 (en) * 1974-07-24 1982-10-09

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2259605A (en) * 1991-09-03 1993-03-17 Burle Technologies Magnetron with cooled pole piece
GB2259605B (en) * 1991-09-03 1995-04-19 Burle Technologies Magnetron with cooled pole piece
GB2259402A (en) * 1991-09-06 1993-03-10 Burle Technologies Thermally graded filament assembly
GB2259402B (en) * 1991-09-06 1995-04-26 Burle Technologies Thermally graded filament assembly

Also Published As

Publication number Publication date
GB2000633B (en) 1982-02-17
JPS6211449B2 (en) 1987-03-12
DE2828873A1 (en) 1979-01-25
JPS5414151A (en) 1979-02-02
DE2828873C2 (en) 1985-06-05
CA1120589A (en) 1982-03-23

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930629