GB2000633A - Microwave tubes incorporating rare earth magnets - Google Patents
Microwave tubes incorporating rare earth magnetsInfo
- 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
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>
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)
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)
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)
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 |
-
1978
- 1978-06-05 CA CA000304780A patent/CA1120589A/en not_active Expired
- 1978-06-29 GB GB7828369A patent/GB2000633B/en not_active Expired
- 1978-06-30 DE DE19782828873 patent/DE2828873C2/en not_active Expired
- 1978-06-30 JP JP7970378A patent/JPS5414151A/en active Granted
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (4)
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 |