US3266000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated toroidal transformer having radially spaced windings
Assignee: Sprague Electric Co
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Filing: 1963-11-29
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Granted: 1966-08-09
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Markarian Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:52
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F17/00; H01F17/04; H01F17/06; H01F17/062; H01F30/00; H01F30/06; H01F30/16; H01F41/04; H01F41/06; H01F41/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A TRANSFORMER HAVING A TORODIAL CORE WITH AN OPEN CENTER NOT MORE THAN ABOUT 1/2 INCH IN WIDTH, A FIRST WINDING LAYER TOROIDALLY WOUND ON SAID CORE, A FIRST SPACER RING HAVING A DIELECTRIC CONSTANT LESS THAN 3 AROUND THE CORE AND AGAINST THE RADIALLY OUTER PORTIONS OF THE FIRST WINDING LAYER, A SECOND SPACER RING HAVING A DIELECTRIC CONSTANT LESS THAN 3 WITHIN THE OPEN CENTER OF THE CORE AND AGAINST THE RADIALLY INNER PORTIONS OF THE FIRST WINDING LAYER, EACH RING HAVING AN AXIAL HEIGHT GREATER THAN THAT OF THE FIRST WINDING LAYER BY AN AMOUNT SUFFICIENT TO CLEAR THAT LAYER, A SECOND WINDING LAYER TOROIDALLY WOUND ON THE RING-AND-CORE ASSEMBLY, AND A DIELECTRIC IMPREGNANT BETWEEN THE WINDING LAYERS AND ANCHORING THEM IN PLACE.
Claim 2
Dependent Claim
126 words
A TRANSFORMER HAVING A TORODIAL CORE WITH AN OPEN CENTER NOT MORE THAN ABOUT 1/2 INCH IN WIDTH, A FIRST WINDING LAYER TOROIDALLY WOUND ON SAID CORE, A FIRST SPACER RING HAVING A DIELECTRIC CONSTANT LESS THAN 3 AROUND THE CORE AND AGAINST THE RADIALLY OUTER PORTIONS OF THE FIRST WINDING LAYER, A SECOND SPACER RING HAVING A DIELECTRIC CONSTANT LESS THAN 3 WITHIN THE OPEN CENTER OF THE CORE AND AGAINST THE RADIALLY INNER PORTIONS OF THE FIRST WINDING LAYER, EACH RING HAVING AN AXIAL HEIGHT GREATER THAN THAT OF THE FIRST WINDING LAYER BY AN AMOUNT SUFFICIENT TO CLEAR THAT LAYER, A SECOND WINDING LAYER TOROIDALLY WOUND ON THE RING-AND-CORE ASSEMBLY, AND A DIELECTRIC IMPREGNANT BETWEEN THE WINDING LAYERS AND ANCHORING THEM IN PLACE.
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |