Patent US2762020A successfully refreshed from Google Patents.
US2762020A
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Variable inductor
Assignee: Helipot Corp
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Filing: 1953-04-07
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Granted: 1956-09-04
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Expires: 1973-04-07
Abstract
No abstract record available.
Inventors
- 👤 James F Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:25
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/14; H01F21/00; H01F21/02; H01F21/08; H01F29/08; H01F29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A VARIABLE INDUCTOR COMPRISING A FERROMAGNETIC CORE AND A WINDING DISPOSED THEREON, AND A MAGNETIC CIRCUIT INCLUDING A MAGNET AND HAVING OPPOSITE MAGNETIC POLES DISPOSED ON OPPOSITE SIDES OF THE CROSS-SECTION OF SAID CORE AND RELATIVELY MOVABLE WITH RESPECT TO EACH OTHER ALONG SAID CORE IN THE DIRECTION OF THE FLUX INDUCED IN SAID CORE BY SAID WINDING TO INCLUDE VARYING LENGTHS OF SAID CORE IN SAID MAGNETIC CIRCUIT.
Claim 2
Dependent Claim
69 words
A VARIABLE INDUCTOR COMPRISING A FERROMAGNETIC CORE AND A WINDING DISPOSED THEREON, AND A MAGNETIC CIRCUIT INCLUDING A MAGNET AND HAVING OPPOSITE MAGNETIC POLES DISPOSED ON OPPOSITE SIDES OF THE CROSS-SECTION OF SAID CORE AND RELATIVELY MOVABLE WITH RESPECT TO EACH OTHER ALONG SAID CORE IN THE DIRECTION OF THE FLUX INDUCED IN SAID CORE BY SAID WINDING TO INCLUDE VARYING LENGTHS OF SAID CORE IN SAID MAGNETIC CIRCUIT.
References Cited (Backward Citations)
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Cited
US1896510A
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US2380242A
Cited
US2503155A
Cited
US2702874A
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US2702875A
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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) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |