US4427462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric apparatus and its magnetic core of (100)[011] silicon-iron sheet made by rapid quenching method
Assignee: Panasonic Holdings Corp
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Filing: 1982-06-18
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Granted: 1984-01-24
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Expires: 2002-06-18
Abstract
Abstract High-silicon steel sheets or ribbons having the crystal texture described by (100)[011] are used for the fabrication of magnetic cores of electrical machinery in such a way that the easy axes of magnetization <001> coincide with the directions of magnetic circuits or lines of magnetic flux. Magnetic cores of, for instance, electric motors or transformers can be remarkably improved in efficiency.
Inventors
- 👤 Harufumi Senno
- 👤 Masayuki Wakamiya
- 👤 Yukio Horita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:34
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/14766; H01F1/14775; C; C21; C21D; C21D6/00; C21D6/008; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49078
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
22 words
A rapidly quenched silicon steel magnetic core for electric machinery characterized in that high-silicon steels with the {100}<011> crystal texture are used.
Claim 2
Dependent Claim
22 words
A rapidly quenched silicon steel magnetic core for electric machinery characterized in that high-silicon steels with the {100}<011> crystal texture are used.
Claim 3
Dependent Claim
31 words
A rapidly quenched silicon steel magnetic core for electric machinery as set forth in claim 1 further characterized in that said high-silicon steels contain 6 to 8% by weight of silicon.
Claim 4
Dependent Claim
44 words
A rapidly quenched silicon steel magnetic core for electric machinery as set forth in claim 2 further characterized in that said magnetic core is so designed and constructed that the magnetic path thereof coincides with the easy axes of magnetization of said high-silicon steels.
Claim 5
Dependent Claim
48 words
A rapidly quenched silicon steel magnetic core for electric machinery as set forth in claim 3 further characterized in that said magnetic core is so designed and constructed that its magnetic paths are inclined by 45° relative to the longitudinal or axial direction of said high-silicon steel ribbons.
Claim 6
Dependent Claim
24 words
An electric motor characterized in that the magnetic poles thereof are made of a rapidly quenched high-silicon steel ribbons with the (100)[011] crystal texture.
Claim 7
Dependent Claim
24 words
An electric motor characterized in that the magnetic poles thereof are made of a rapidly quenched high-silicon steel ribbons with the (100)[011] crystal texture.
Claim 8
Dependent Claim
24 words
An electric motor as set forth in claim 5 further characterized in that said magnetic poles contain 6 to 8% by weight of silicon.
Claim 9
Dependent Claim
32 words
An electric motor as set forth in claim 6 further characterized in that the magnetic paths of said magnetic poles coincide with the easy axes of magnetization of said high-silicon steel ribbons.
Claim 10
Dependent Claim
34 words
An electric motor as set forth in claim 7 further characterized in that the magnetic paths through said magnetic poles are inclined by 45° relative to the longitudinal direction of said high-silicon steel ribbons.
Claim 11
Dependent Claim
21 words
A transformer characterized in that its core is made of a rapidly quenched high-silicon steel ribbons with the (100)[011] crystal texture.
Claim 12
Dependent Claim
21 words
A transformer characterized in that its core is made of a rapidly quenched high-silicon steel ribbons with the (100)[011] crystal texture.
Claim 13
Dependent Claim
22 words
A transformer as set forth in claim 9 further characterized in that said core contains 6 to 8% by weight of silicon.
Claim 14
Dependent Claim
30 words
A transformer as set forth in claim 10 further characterized in that the magnetic path through said core coincides with the easy axes of magnetization of said high-silicon steel ribbons.
Claim 15
Dependent Claim
32 words
A transformer as set forth in claim 11 further characterized in that the magnetic paths through said core are inclined by 45° relative to the longitudinal direction of said high-silicon steel ribbons.
Claim 16
Dependent Claim
21 words
A magnetic core for electric machinery characterized by being fabricated from a rapidly quenched high-silicon steel with the (100)[011] crystal texture.
Claim 17
Dependent Claim
21 words
A magnetic core for electric machinery characterized by being fabricated from a rapidly quenched high-silicon steel with the (100)[011] crystal texture.
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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |