US3219957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core for electromagnetic device
Assignee: Advance Transformer Co
•
Filing: 1957-12-03
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Granted: 1965-11-23
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Expires: 1977-12-03
Abstract
No abstract record available.
Inventors
- 👤 Albert E Feinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:38
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/24; H01F27/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A CORE CONSTRUCTION FOR ELECTROMAGNETIC DEVICES, WHICH COMPRISES A GENERALLY RECTANGULAR INTEGRAL SHELL MEMBER HAVING YOKES CONNECTING ELONGATE SIDES THEREOF, A CENTRAL WINDING LEG ADAPTED TO BE FORCEDLY ENGAGED IN THE CENTER OF THE SHELL MEMBER WITH ITS ENDS MATINGLY ENGAGED IN THE YOKES, AND AT LEST ONE WEAKENED SECTION IN AT LEAST ONE OF SAID YOKES BETWEEN THE ENDS THEREOF DIVIDING SAID YOKE INTO TWO PARTS AND SAID SECTION BEING TRANSVERSELY DISTORTABLE RELATIVE TO SAID SHELL AND OPERABLE TO ENABLE THE SAID PARTS TO BE SLIGHTLY SPREAD APART WHEN SAID WINDING LEG IS FORCED INTO SAID MATINGLY ENGAGED POSITION THROUGH TWISTING OF SAID WEAKENED SECTION.
Claim 2
Dependent Claim
106 words
A CORE CONSTRUCTION FOR ELECTROMAGNETIC DEVICES, WHICH COMPRISES A GENERALLY RECTANGULAR INTEGRAL SHELL MEMBER HAVING YOKES CONNECTING ELONGATE SIDES THEREOF, A CENTRAL WINDING LEG ADAPTED TO BE FORCEDLY ENGAGED IN THE CENTER OF THE SHELL MEMBER WITH ITS ENDS MATINGLY ENGAGED IN THE YOKES, AND AT LEST ONE WEAKENED SECTION IN AT LEAST ONE OF SAID YOKES BETWEEN THE ENDS THEREOF DIVIDING SAID YOKE INTO TWO PARTS AND SAID SECTION BEING TRANSVERSELY DISTORTABLE RELATIVE TO SAID SHELL AND OPERABLE TO ENABLE THE SAID PARTS TO BE SLIGHTLY SPREAD APART WHEN SAID WINDING LEG IS FORCED INTO SAID MATINGLY ENGAGED POSITION THROUGH TWISTING OF SAID WEAKENED SECTION.
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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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |