US3569886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic core structures
Assignee: Westinghouse Electric Corp
•
Filing: 1969-09-24
•
Granted: 1971-03-09
•
Expires: 1989-09-24
Abstract
Abstract A three-legged magnetic core structure having a plurality of stacked layers of metallic laminations, including two outer leg laminations, an inner leg lamination, and joining upper and lower yoke laminations. Each layer of laminations is of like construction, utilizing laminations of like configuration and dimensions, with the layers being oriented differently to provide three layers between repeating joints. The joints at the outer corners of the magnetic core are mitered, and the joints between the yoke and inner leg lamination include a mitered and a square joint at each end of the inner leg lamination. The inner leg lamination has one end narrowed where it joins a yoke lamination with a square joint, to provide the required joint distribution between the inner leg lamination and adjoining yoke laminations.
Inventors
- 👤 Theodore R Specht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:23
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245; H01F41/00; H01F41/02; H01F41/0206; H01F41/0233
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
170 words
A magnetic core comprising: at least one group of four stacked layers of metallic laminations; a first layer of said at least one group including first and second outer leg laminations, an inner leg lamination, first and second upper yoke laminations which join said outer leg laminations with mitered joints, and said inner leg lamination with mitered and square joints, respectively, and first and second lower yoke laminations which join said outer leg laminations with mitered joints and said inner leg lamination with mitered and square joints, respectively; and one end of said inner leg lamination having a step which narrows the width of the lamination where the inner leg lamination joins a yoke lamination with a square joint; each lamination of said first layer having a duplicate in each of the three removing layers of the group, with the laminations of the three remaining layers being assembled the same as the first layer, each of said layers being oriented to distribute each joint into different planes through the group.
Claim 2
Dependent Claim
170 words
A magnetic core comprising: at least one group of four stacked layers of metallic laminations; a first layer of said at least one group including first and second outer leg laminations, an inner leg lamination, first and second upper yoke laminations which join said outer leg laminations with mitered joints, and said inner leg lamination with mitered and square joints, respectively, and first and second lower yoke laminations which join said outer leg laminations with mitered joints and said inner leg lamination with mitered and square joints, respectively; and one end of said inner leg lamination having a step which narrows the width of the lamination where the inner leg lamination joins a yoke lamination with a square joint; each lamination of said first layer having a duplicate in each of the three removing layers of the group, with the laminations of the three remaining layers being assembled the same as the first layer, each of said layers being oriented to distribute each joint into different planes through the group.
Claim 3
Dependent Claim
33 words
The magnetic core of claim 1 wherein each of the three-remaining layers of the group is in 180* rotational symmetry with the first layer, each about a different axis of the first layer.
Claim 4
Dependent Claim
76 words
The magnetic core of claim 2 wherein the axes of the firSt layer about which the three-remaining layers are in rotational symmetry with are: a. an axis which extends longitudinally through the inner leg lamination, in the plane of the lamination; b. an axis which extends perpendicularly through the plane of the inner leg lamination; and c. an axis which is perpendicular to the sides of the inner leg lamination, in the plane of the lamination.
Claim 5
Dependent Claim
39 words
The magnetic core of claim 3 wherein the inner leg lamination has substantially the configuration of a parallelogram, and the second, third and fourth layers are oriented relative to the first layer in the sequence a, b, and c.
Claim 6
Dependent Claim
39 words
The magnetic core of claim 3 wherein the inner leg lamination has substantially the configuration of a parallelogram, and the second, third and fourth layers are oriented, relative to the first layer, in the sequence c, b and a.
Claim 7
Dependent Claim
39 words
The magnetic core of claim 3 wherein the inner leg lamination has substantially the configuration of a trapezoid, and the second, third and fourth layers are oriented, relative to the first layer, in the sequence a, c and b.
Claim 8
Dependent Claim
39 words
The magnetic core of claim 3 wherein the inner leg lamination has substantially the configuration of a trapezoid, and the second, third and fourth layers are oriented, relative to the first layer, in the sequence b, c and a.
Claim 9
Dependent Claim
38 words
The magnetic core of claim 1 wherein the first upper and first lower yoke laminations have substantially the same configuration and dimensions, and the second upper and second lower yoke laminations have substantially the same configuration and dimensions.
Claim 10
Dependent Claim
54 words
The magnetic core of claim 8 wherein the innner leg lamination has substantially the configuration of a parallelogram, with the first upper and first lower yoke laminations joining the first and second outer leg laminations, respectively, and the second upper and second lower yoke laminations joining the second and first outer leg laminations, respectively.
Claim 11
Dependent Claim
48 words
The magnetic core of claim 8 wherein the inner leg lamination has substantially the configuration of a trapezoid, with the first upper and first lower yoke laminations joining the first outer leg lamination, and the second upper and second lower yoke laminations joining the second outer leg lamination.
Claim 12
Dependent Claim
31 words
The magnetic core of claim 1 including a plurality of groups of four layers of laminations, stacked in superposed relation, each constructed similar to the at least one group of laminations.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |