Patent US3087131A successfully refreshed from Google Patents.
US3087131A
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Variable inductive device
Assignee: General Dynamics Corp
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Filing: 1961-12-22
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Granted: 1963-04-23
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Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 Stephen W Babcock
- 👤 Denis W Grisel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:32
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/06; H01F17/062
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
152 words
A MECHANICALLY VARIABLE INDUCTIVE DEVICE COMPRISING, IN COMBINATION: A HOUSING; A PERMANENT MAGNET HAVING A NORTH MAGNETIC POLE AND A SOUTH MAGNETIC POLE WITH A GAP THEREBETWEEN TRAVERSED BY THE PATH OF TRAVEL OF THE FLUX BETWEEN SAID POLES; AN INDUCTIVE UNIT COMPRISING A CONTINUOUS CORE OF MAGNETIC MATERIAL WOUND WITH A CURRENT-CARRYING CONDUCTOR POSITIONED INTERMEDIATE SAID POLES IN SAID GAP IN SAID PATH OF FLUX TRAVEL FOR SUPERIMPOSITION OF SAID FLUX UPON THE CORE TO VARY THE INCREMENTAL PERMEABILITY OF THE CORE RESPONSIVE TO VARIATIONS IN THE DENSITY OF SAID FLUX; AND A SHUNT POLE PIECE POSITIONED ADJACENT SAID PERMANENT MAGNET FURNISHING A PATH OF LOW MAGNETIC RELUCTANCE FOR SHUNTING SAID FLUX FROM SAID CORE AND MOVABLE TOWARD AND AWAY FROM THE PERMANENT MAGNET TO DETERMINE THE FLUX SHUNTED AND THEREBY THE DENSITY OF THE FLUX SUPERIMPOSED UPON THE CORE, THE CORE INCREMENTAL PERMEABILITY, AND THE INCREMENTAL INDUCTANCE OF THE DEVICE.
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |