Patent US3898599A successfully refreshed from Google Patents.
US3898599A
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Toroidal magnetic device
Assignee: Raytheon Co
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Filing: 1974-05-09
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Granted: 1975-08-05
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Expires: 1994-05-09
Abstract
Abstract A toroidal magnetic device comprising inner and outer concentric rings of compatible magnetic material having interfacing peripheral surfaces diffusion bonded to one another to form a unitary integral structure which is magnetized in the radial direction.
Inventors
- 👤 William R Reid
- 👤 Albert A Gale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:28
CPC Classifications
H; H01; H01F; H01F13/00; H01F13/003; H01F7/00; H01F7/02; H01F7/0205; H01F7/021
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A toroidal magnetic device comprising inner and outer concentric rings having interfaced peripheral portions diffusion bonded to one another, one of the rings being a radially polarized permanent magnet made of compacted powder material and the other ring being a support annulus made of soft magnetic material having relatively low magnetic retentivity.
Claim 2
Dependent Claim
52 words
A toroidal magnetic device comprising inner and outer concentric rings having interfaced peripheral portions diffusion bonded to one another, one of the rings being a radially polarized permanent magnet made of compacted powder material and the other ring being a support annulus made of soft magnetic material having relatively low magnetic retentivity.
Claim 3
Dependent Claim
63 words
A toroidal magnetic device comprising inner and outer concentric rings having interfaced peripheral portions diffusion bonded to one another, one of the rings being a support annulus made of soft magnetic material and the other ring being a compacted powder permanent magnet having a circumferential magnetic pole adjacent one periphery of the device and a continuous opposite magnetic pole adjacent the support annulus.
Claim 4
Dependent Claim
63 words
A toroidal magnetic device comprising inner and outer concentric rings having interfaced peripheral portions diffusion bonded to one another, one of the rings being a support annulus made of soft magnetic material and the other ring being a compacted powder permanent magnet having a circumferential magnetic pole adjacent one periphery of the device and a continuous opposite magnetic pole adjacent the support annulus.
Claim 5
Dependent Claim
48 words
A toroidal magnetic device as set forth in claim 2 wherein the inner ring comprises the support annulus and the outer ring comprises the permanent magnet having a circumferential magnetic pole adjAcent the outer periphery of the device and a continuous opposite magnetic pole adjacent the support annulus.
Claim 6
Dependent Claim
48 words
A toroidal magnetic device as set forth in claim 2 wherein the outer ring comprises the support annulus and the inner ring comprises the permanent magnet having a circumferential magnetic pole adjacent the inner periphery of the device and a continuous opposite magnetic pole adjacent the support annulus.
Claim 7
Dependent Claim
78 words
A toroidal magnetic device comprising inner and outer concentric rings having interfaced peripheral portions diffusion bonded to one another, one of the rings being a support annulus made of soft magnetic material and the other ring being a compacted powder permanent magnet having adjacent one periphery of the device a circular array of alternate north and south poles, each of which is magnetically associated with a respective opposite magnetic pole radially located therefrom and adjacent the support annulus.
Claim 8
Dependent Claim
78 words
A toroidal magnetic device comprising inner and outer concentric rings having interfaced peripheral portions diffusion bonded to one another, one of the rings being a support annulus made of soft magnetic material and the other ring being a compacted powder permanent magnet having adjacent one periphery of the device a circular array of alternate north and south poles, each of which is magnetically associated with a respective opposite magnetic pole radially located therefrom and adjacent the support annulus.
Claim 9
Dependent Claim
59 words
A toroidal magnetic device as set forth in claim 5 wherein the inner ring comprises the support annulus and the outer ring comprises the permanent magnet having adjacent the outer periphery of the device a circular array of alternate north and south magnetic poles and adjacent the support annulus a similar circular array of south and noth magnetic poles.
Claim 10
Dependent Claim
60 words
A toroidal magnetic device as set forth in claim 5 wherein the outer ring comprises the support annulus and the inner ring comprises the permanent magnet having adjacent the inner periphery of the device a circular array of alternate north and south magnetic poles and adjacent the support annulus a similar circular array of alternate south and north magnetic poles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |