Patent JPS5670448A successfully refreshed from Google Patents.
US3227980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable inductor employing spaced magnetic hubs
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1963-02-27
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Granted: 1966-01-04
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Expires: 1983-02-27
Abstract
No abstract record available.
Inventors
- 👤 Immo C Roser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:13
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A VARIABLE INDUCTOR COMPRISING A SUPPORT, A NONMAGNETIC THERMALLY EXPANSIBLE TUBE ON SAID SUPPORT, A MAGNETIC BOBBIN STRUCTURE RECEIVED IN SNUG FITTING RELATION ABOUT SAID TUBE, SAID BOBBIN STRUCTURE BEING COMPOSED OF A PAIR OF HUBS EACH OF WHICH HAS A TUBULAR BODY PORTION AND AN ENLARGED FLANGE PORTION THEREON, THE HUBS BEING ALIGNED WITH THE TUBULAR BODY PORTIONS THEREOF IN CONFRONTING RELATION, A NON-MAGNETIC, NON-CONDUCTIVE SPACER DISPOSED BETWEEN THE CONFRONTING TUBULAR BODY PORTIONS TO PROVIDE A NON-MAGNETIC GAP THEREBETWEEN, A COIL DISPOSED AROUND THE HUBS AND BETWEEN THE FLANGE PORTIONS, AND A FERROMAGNETIC CORE MEMBER EXTENDING THROUGH SAID BOBBIN STRUCTURE AND BEING ADJUSTABLY POSITIONABLE WITHIN SAID TUBE.
Claim 2
Dependent Claim
108 words
A VARIABLE INDUCTOR COMPRISING A SUPPORT, A NONMAGNETIC THERMALLY EXPANSIBLE TUBE ON SAID SUPPORT, A MAGNETIC BOBBIN STRUCTURE RECEIVED IN SNUG FITTING RELATION ABOUT SAID TUBE, SAID BOBBIN STRUCTURE BEING COMPOSED OF A PAIR OF HUBS EACH OF WHICH HAS A TUBULAR BODY PORTION AND AN ENLARGED FLANGE PORTION THEREON, THE HUBS BEING ALIGNED WITH THE TUBULAR BODY PORTIONS THEREOF IN CONFRONTING RELATION, A NON-MAGNETIC, NON-CONDUCTIVE SPACER DISPOSED BETWEEN THE CONFRONTING TUBULAR BODY PORTIONS TO PROVIDE A NON-MAGNETIC GAP THEREBETWEEN, A COIL DISPOSED AROUND THE HUBS AND BETWEEN THE FLANGE PORTIONS, AND A FERROMAGNETIC CORE MEMBER EXTENDING THROUGH SAID BOBBIN STRUCTURE AND BEING ADJUSTABLY POSITIONABLE WITHIN SAID TUBE.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |