Patent US3339191A successfully refreshed from Google Patents.
US3339191A
Expired / Lapsed
US
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Core driver test apparatus
Assignee: International Business Machines Corp
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Filing: 1958-09-29
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Granted: 1967-08-29
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Expires: 1978-09-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Cornelius F Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:39
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A CORE SELECTION SYSTEM, MEANS INCLUDING DRIVING CIRCUITS FROM WHICH DRIVING CURRENTS ARE SELECTIVELY PRODUCED AD A SET CIRCUIT FROM WHICH A SET CURRENT IS PRODUCED FOR SUCCESSIVELY OPERATING THE SYSTEM, AND ADDITIONAL BISTABLE MAGNETIC TEST CORE, FIRST WINDING MEANS ON SAID TEST CORE COUPLED TO ALL OF SAID DRIVING CIRCUITS FOR CONDUCTING EACH DRIVING CURRENT THROUGH THE TEST CORE IN ONE DIRECTION, SECOND WINDING MEANS ON SAID TEST CORE COUPLED TO SAID SET CIRCUIT FOR CONDUCTING THE SET CURRENT THROUGH THE TEST CORE IN THE OPPOSITE DIRECTION, THE RESPECTIVE COUPLING STRENGTHS OF SAID FIRST AND SECOND WINDING MEANS BEING SUCH THAT SAID TEST CORE IS CHANGED FROM ONE STABLE STATE TO ANOTHER ONLY UPON OPERATION OF A PREDETERMINED NUMBER OF SAID DRIVING CURRENTS COINCIDENTLY WITH OPERATION OF SAID SET CIRCUIT, AND MEANS FOR SENSING A CHANGE OF MAGNETIC STATE OF SAID TEST CORE AS AN INDICATION OF THE CHARACTER OF OPERATION OF SAID CORE SELECTION SYSTEM.
Claim 2
Dependent Claim
158 words
IN A CORE SELECTION SYSTEM, MEANS INCLUDING DRIVING CIRCUITS FROM WHICH DRIVING CURRENTS ARE SELECTIVELY PRODUCED AD A SET CIRCUIT FROM WHICH A SET CURRENT IS PRODUCED FOR SUCCESSIVELY OPERATING THE SYSTEM, AND ADDITIONAL BISTABLE MAGNETIC TEST CORE, FIRST WINDING MEANS ON SAID TEST CORE COUPLED TO ALL OF SAID DRIVING CIRCUITS FOR CONDUCTING EACH DRIVING CURRENT THROUGH THE TEST CORE IN ONE DIRECTION, SECOND WINDING MEANS ON SAID TEST CORE COUPLED TO SAID SET CIRCUIT FOR CONDUCTING THE SET CURRENT THROUGH THE TEST CORE IN THE OPPOSITE DIRECTION, THE RESPECTIVE COUPLING STRENGTHS OF SAID FIRST AND SECOND WINDING MEANS BEING SUCH THAT SAID TEST CORE IS CHANGED FROM ONE STABLE STATE TO ANOTHER ONLY UPON OPERATION OF A PREDETERMINED NUMBER OF SAID DRIVING CURRENTS COINCIDENTLY WITH OPERATION OF SAID SET CIRCUIT, AND MEANS FOR SENSING A CHANGE OF MAGNETIC STATE OF SAID TEST CORE AS AN INDICATION OF THE CHARACTER OF OPERATION OF SAID CORE SELECTION SYSTEM.
References Cited (Backward Citations)
US2889540A
Cited
US2904780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |