US3587020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-part core sheet for transformers
Assignee: Individual
•
Filing: 1969-07-01
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Granted: 1971-06-22
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Expires: 1989-07-01
Abstract
Abstract A core sheet for a transformer core formed from two complementary sheet parts. Each sheet part comprises a yoke, an end limb and part of a central limb of the whole core sheet, and the two parts are positively locked together to form the sheet by engagement of complementary projections and recesses on abutting edges of the sheet parts.
Inventors
- 👤 Bruno Waasner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:18
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
193 words
A two-piece core sheet assembly for a transformer having two side branches, a center branch, and two spaced yoke branches interconnecting the side and center branches, said core sheet comprising two sheet members adapted to be assembled together, each sheet member integrally including a side branch, a yoke, and a diagonal portion of the center branch, wherein an inner longitudinal edge at the free extremity of each of the side branches and the free edge of each yoke branch forms a matching projection and recess corresponding to said projecTion, said projections and said associated recesses being disposed closer to the outside edges than the inside edges of said core sheet assembly, whereby when the two sheet members are pushed together in a common plane, a resilient outward deflection of the free extremity of the side branches occurs, followed by engagement of the projections in the recesses with said diagonal portions of the center branch of said two sheet members causing the matched projections and recesses to approach each other such that the resilient deflection of the free extremity of the side branches does not occur until the final stage of the mutual insertion.
Claim 2
Dependent Claim
193 words
A two-piece core sheet assembly for a transformer having two side branches, a center branch, and two spaced yoke branches interconnecting the side and center branches, said core sheet comprising two sheet members adapted to be assembled together, each sheet member integrally including a side branch, a yoke, and a diagonal portion of the center branch, wherein an inner longitudinal edge at the free extremity of each of the side branches and the free edge of each yoke branch forms a matching projection and recess corresponding to said projecTion, said projections and said associated recesses being disposed closer to the outside edges than the inside edges of said core sheet assembly, whereby when the two sheet members are pushed together in a common plane, a resilient outward deflection of the free extremity of the side branches occurs, followed by engagement of the projections in the recesses with said diagonal portions of the center branch of said two sheet members causing the matched projections and recesses to approach each other such that the resilient deflection of the free extremity of the side branches does not occur until the final stage of the mutual insertion.
Claim 3
Dependent Claim
45 words
A two-piece core sheet assembly as defined in claim 1, wherein the narrow extremity of the diagonal central branch portion of one sheet member is insertable into a matching notch in the yoke branch of the opposed sheet member, in the plane of the sheet.
Claim 4
Dependent Claim
44 words
A two-piece core sheet assembly as defined in claim 2, wherein said projections are provided on the inner longitudinal edge of the free extremity of each of the side branches and wherein the recesses are provided at the free edge of each yoke branch.
Claim 5
Dependent Claim
20 words
A two-piece core sheet assembly as defined in claim 3, wherein said projections and associated recesses are rectangular in shape.
Claim 6
Dependent Claim
72 words
A two-piece core sheet assembly as defined in claim 2, wherein said narrow extremity of the diagonal central branch portion insertable into a matching notch in said yoke branch of the opposed sheet member has a predetermined clearance in said notch, and wherein the side edge of each projection and a corresponding edge of each recess are inclined with respect to the abutting edges of the yoke member and the side member.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |