US4565746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron core for a stationary induction apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1982-10-28
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Granted: 1986-01-21
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Expires: 2002-10-28
Abstract
Abstract An iron core for a stationary induction apparatus, such as a transformer or reactor, comprising an alternate laminate of thin amorphous magnetic strips (21a to 21d) and silicon steel sheets (11a to 11d). It is low in electrical loss, and high in workability.
Inventors
- 👤 Iwao Hayase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:01
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245; H01F3/00; H01F3/10; H01F2003/106; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12639; Y10T428/12646; Y10T428/12653
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
79 words
A magnetic core for a stationary induction apparatus comprising a plurality of laminates stacked in a first direction, each said laminate comprising an alternate laminate of a thin substantially unbent amorphous magnetic strip and a substantially unbent silicon steel sheet, said strip and sheet being disposed to each other in a second direction perpendicular to said first direction, wherein each said laminate comprises a plurality of silicon steel sheets disposed inwardly and outwardly of said thin amorphous magnetic strip.
Claim 2
Dependent Claim
79 words
A magnetic core for a stationary induction apparatus comprising a plurality of laminates stacked in a first direction, each said laminate comprising an alternate laminate of a thin substantially unbent amorphous magnetic strip and a substantially unbent silicon steel sheet, said strip and sheet being disposed to each other in a second direction perpendicular to said first direction, wherein each said laminate comprises a plurality of silicon steel sheets disposed inwardly and outwardly of said thin amorphous magnetic strip.
Claim 3
Dependent Claim
79 words
A magnetic core for a stationary apparatus comprising a plurality of laminates stacked in a first direction, each said laminate comprising an alternate laminate of a thin substantially unbent amorphous magnetic strip and a substantially unbent silicon steel sheet, said strip and sheet being disposed to each other in a second direction perpendicular to said first direction, wherein said silicon steel sheet is disposed inwardly of said thin amorphous magnetic strip, and closer to the center of said core.
Claim 4
Dependent Claim
79 words
A magnetic core for a stationary apparatus comprising a plurality of laminates stacked in a first direction, each said laminate comprising an alternate laminate of a thin substantially unbent amorphous magnetic strip and a substantially unbent silicon steel sheet, said strip and sheet being disposed to each other in a second direction perpendicular to said first direction, wherein said silicon steel sheet is disposed inwardly of said thin amorphous magnetic strip, and closer to the center of said core.
Claim 5
Dependent Claim
83 words
A magnetic core comprising a plurality of laminates stacked in a first direction, each said laminate comprising an alternate laminate of a thin substantially unbent amorphous magnetic strip and a substantially unbent silicon steel sheet, said silicon steel sheet being disposed inwardly of said amorphous magnetic strip and closer to the center of said core in a second direction perpendicular to said first direction, wherein each said amorphous magnetic strip comprises a plurality of contiguous amorphous magnetic sheets disposed along said first direction.
Claim 6
Dependent Claim
83 words
A magnetic core comprising a plurality of laminates stacked in a first direction, each said laminate comprising an alternate laminate of a thin substantially unbent amorphous magnetic strip and a substantially unbent silicon steel sheet, said silicon steel sheet being disposed inwardly of said amorphous magnetic strip and closer to the center of said core in a second direction perpendicular to said first direction, wherein each said amorphous magnetic strip comprises a plurality of contiguous amorphous magnetic sheets disposed along said first direction.
Claim 7
Dependent Claim
22 words
A magnetic core as recited in claim 3, wherein said plurality of amorphous magnetic sheets are additionally disposed along said second direction.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |