Patent US3781592A successfully refreshed from Google Patents.
US3781592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial magnetized magnet
Assignee: Raytheon Co
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Filing: 1972-06-08
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Granted: 1973-12-25
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Expires: 1992-06-08
Abstract
Abstract A permanent magnet package for electromagnetic devices, including traveling wave tubes, linear beam devices, klystrons, magnetrons, crossed field and backward wave amplifiers or oscillators and the like comprising a plurality of radially oriented linearly polarized members collectively providing a magnetic circuit. A soft iron return path between the assembled multi-segmented magnetized components completes the magnetic circuit. Magnetic materials, such as samarium-cobalt, platinumcobalt, alnico and ferrite may be utilized.
Inventors
- 👤 W Harrold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:35
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/08; H01J23/087; H01F; H01F7/00; H01F7/02; H01F7/0273; H01F7/0278; H01J23/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A microwave device according to claim 1 wherein said shield and return path means are formed of a nonmagnetized ferrous material.
Claim 2
Dependent Claim
27 words
The device according to claim 1 wherein the magnetic field polar orientations of adjacent members in each of said first and second permanent magnet package are similar.
Claim 3
Dependent Claim
18 words
The device according to claim 1 wherein each of said magnetic segments is substantially truncated with tapered sidewalls.
Claim 4
Dependent Claim
34 words
The device according to claim 1 wherein each of said magnetic segments is substantially truncated and has a tapered sidewall and a substantially straight sidewall extending along a plane parallel to the envelope axis.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |