Patent US5761052A successfully refreshed from Google Patents.
Patent US3274527A successfully refreshed from Google Patents.
US3274527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentric helical coils with electrically connected crossover points
Assignee: English Electric Co Ltd
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Filing: 1964-06-03
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Granted: 1966-09-20
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Expires: 1984-06-03
Abstract
No abstract record available.
Inventors
- 👤 Robinson Alfred Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:34
CPC Classifications
H; H01; H01F; H01F37/00; H01F37/005; H01F27/00; H01F27/34; H01F27/343; H01F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
AN INDUCTOR COMPRISING TWO TERMINALS, FIRST AND SECOND HELICAL COILS EACH CONNECTED BETWEEN SAID TWO TERMINALS AND WOUND ABOUT A COMMON AXIS SO AS TO CROSS OVER ONE ANOTHER AT A PLURALITY OF POINTS, SAID FIRST COIL HAVING A RELATIVELY HIGH RESISTANCE AND SAID SECOND COIL HAVING A RELATIVELY LOW RESISTANCE, AND CONNECTING MEANS INTERCONNECTING THE FIRST AND SECOND COILS AT SELECTED ONES OF SAID POINTS WHEREBY SELECTED LENGTHS OF SAID SECOND COIL ARE SHUNTED BY THE RESISTANCE POSSESSED BY ELECTED LENGTHS OF SAID FIRST COIL.
Claim 2
Dependent Claim
86 words
AN INDUCTOR COMPRISING TWO TERMINALS, FIRST AND SECOND HELICAL COILS EACH CONNECTED BETWEEN SAID TWO TERMINALS AND WOUND ABOUT A COMMON AXIS SO AS TO CROSS OVER ONE ANOTHER AT A PLURALITY OF POINTS, SAID FIRST COIL HAVING A RELATIVELY HIGH RESISTANCE AND SAID SECOND COIL HAVING A RELATIVELY LOW RESISTANCE, AND CONNECTING MEANS INTERCONNECTING THE FIRST AND SECOND COILS AT SELECTED ONES OF SAID POINTS WHEREBY SELECTED LENGTHS OF SAID SECOND COIL ARE SHUNTED BY THE RESISTANCE POSSESSED BY ELECTED LENGTHS OF SAID FIRST COIL.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |