US3128044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable transformer
Assignee: Northrop Grumman Corp
•
Filing: 1961-11-01
•
Granted: 1964-04-07
•
Expires: 1981-11-01
Abstract
No abstract record available.
Inventors
- 👤 Packard Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:05
CPC Classifications
H; H01; H01F; H01F29/00; H01F29/08; H01F29/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A VARIABLE TRANSFORMER, COMPRISING A FIRST FERROMAGNETIC ELEMENT HAVING A PLURALITY OF PROJECTING POLE PIECES, A SECOND FERROMAGNETIC ELEMENT PROVIDED WITH A PROJECTING TOOTH FOR EACH PAIR OF POLE PIECES ON SAID FIRST ELEMENT, SAID ELEMENTS BEING MOUNTED FOR RELATIVE MOVEMENT WITH SAID TEETH CONFRONTING SAID POLE PIECES, A FIRST SERIES OF SECONDARY COILS CONNECTED IN SERIES AND WOUND ON ALTERNATE POLE PIECES, SAID COILS BEING ALTERNATELY OPPOSITELY WOUND, A SECOND SERIES OF SECONDARY COILS CONNECTED IN SERIES AND WOUND ON THE REMAINING ALTERNATE POLE PIECES, SAID SECOND SERIES OF COILS BEING ALTERNATELY OPPO-
Claim 2
Dependent Claim
94 words
A VARIABLE TRANSFORMER, COMPRISING A FIRST FERROMAGNETIC ELEMENT HAVING A PLURALITY OF PROJECTING POLE PIECES, A SECOND FERROMAGNETIC ELEMENT PROVIDED WITH A PROJECTING TOOTH FOR EACH PAIR OF POLE PIECES ON SAID FIRST ELEMENT, SAID ELEMENTS BEING MOUNTED FOR RELATIVE MOVEMENT WITH SAID TEETH CONFRONTING SAID POLE PIECES, A FIRST SERIES OF SECONDARY COILS CONNECTED IN SERIES AND WOUND ON ALTERNATE POLE PIECES, SAID COILS BEING ALTERNATELY OPPOSITELY WOUND, A SECOND SERIES OF SECONDARY COILS CONNECTED IN SERIES AND WOUND ON THE REMAINING ALTERNATE POLE PIECES, SAID SECOND SERIES OF COILS BEING ALTERNATELY OPPO-
References Cited (Backward Citations)
US2882484A
Cited
US3041486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |