Patent US3609859A successfully refreshed from Google Patents.
US3609859A
Expired / Lapsed
US
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Method of making an electric transformer
Assignee: Westinghouse Electric Corp
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Filing: 1969-06-20
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Granted: 1971-10-05
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Expires: 1989-06-20
Abstract
Abstract AN ELECTRICAL TRANSFORMED AND METHOD OF CONSTRUCTING SAME, WHEREIN A PLURALITY OF ELECTRICAL COILS ARE WOUND ON SEPARATE COIL FORMS. THE PLURALITY OF COILS ARE EACH ATTACHED TO A SEPARATE INSULATING WASHER MEMBER, WITH THE COILS LEADS ALSO BEING FIXED TO THE WASHER MEMBER. THE COILS AND WASHERS MEMBERS ARE DISPOSED ON A COMMON INSULATING TUBE IN SIDE-BY-SIDE RELATION, AND A MAGNETIC CORE IS ASSEMBLED ABOUT THE COILS, INCLUDING A PORTION WHICH EXTENDS THROUGH THE OPENING IN THE COMMON INSULATING TUBE. THE COILS FORMS A COMMON INSULATING TUBE PROIVDE THE COIL TO CORE INSULATION, WHILE THE INSULATING WASHER MEMBERS PROVIDE BARRIER INSULATION BETWEEN THE COILS. D R A W I N G
Inventors
- 👤 Clarence W Hunt
- 👤 Ralph W Johnston
- 👤 Donald S Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:19
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/02; H01F27/022; H01F27/28; H01F27/32; H01F27/324; H01F27/325; H01F41/00; H01F41/005; H01F41/02; H01F41/04; H01F41/12; H01F41/127; H01F5/00; H01F5/02; H01F2005/022; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 0
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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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |