US3719911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated magnetic coil materials
Assignee: Hitachi Ltd
•
Filing: 1970-10-23
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Granted: 1973-03-06
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Expires: 1990-10-23
Abstract
Abstract A laminated magnetic material composed of thin rolled sheet of magnetic alloy having a thickness of less than 25 microns and a glassy material formed on at least one surface of the thin rolled sheet of magnetic alloy, wherein the sheet of magnetic alloy and the glassy material are wound and laminated alternately and each of the layers of magnetic alloy is secured to the adjacent layer interposed by an electric insulator.
Inventors
- 👤 S Tomita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:53
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071; Y10T29/49075; Y10T29/49078; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A laminated magnetic material having a coil comprising, a non-magnetic support base, an electric insulator film formed on the surface of said support base, a plurality of inner coil conductors disposed on said insulator film along the longitudinal direction of said support base, a rolled sheet of high permeability magnetic alloy, said sheet of magnetic alloy having a thickness of less than 25 microns, a glassy material formed on at least one surface of said sheet of magnetic alloy, said sheet of magnetic alloy and said glassy material being wound and laminated alternately and crossing said inner coil conductors, a plurality of outer coil conductors disposed on an electric insulator film forced on said wound and laminated body, and a plurality of conductor foils bridging said outer and inner coil conductors disposed on both outer and inner surfaces of said laminated body, wherein each layer of said wound and laminated body is secured to the adjecent layer and interposed by an electric insulator.
Claim 2
Dependent Claim
163 words
A laminated magnetic material having a coil comprising, a non-magnetic support base, an electric insulator film formed on the surface of said support base, a plurality of inner coil conductors disposed on said insulator film along the longitudinal direction of said support base, a rolled sheet of high permeability magnetic alloy, said sheet of magnetic alloy having a thickness of less than 25 microns, a glassy material formed on at least one surface of said sheet of magnetic alloy, said sheet of magnetic alloy and said glassy material being wound and laminated alternately and crossing said inner coil conductors, a plurality of outer coil conductors disposed on an electric insulator film forced on said wound and laminated body, and a plurality of conductor foils bridging said outer and inner coil conductors disposed on both outer and inner surfaces of said laminated body, wherein each layer of said wound and laminated body is secured to the adjecent layer and interposed by an electric insulator.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |