US3328598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-conductor switching circuit with automatic unlock
Assignee: Astro Dynamics Inc
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Filing: 1963-06-24
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Granted: 1967-06-27
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Expires: 1983-06-24
Abstract
No abstract record available.
Inventors
- 👤 Katz Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:32
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/519; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/122; H02H7/1225; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
APPARATUS OF THE TYPE DESCRIBED, COMPRISING A PAIR OF ELECTRIC SWITCH DEVICES EACH HAVING A COMMON ELECTRODE, AN INPUT ELECTRODE, AND AN OUTPUT ELECTRODE, A WINDING CONNECTED BETWEEN SAID OUTPUT ELECTRODES, MEANS FOR CONNECTING AN ELECTRIC SUPPLY BETWEEN SAID COMMON ELECTRODES AND A POINT ON SAID WINDING, MEANS FOR APPLYING PUSH-PULL ELECTRIC DRIVE SIGNALS TO SAID INPUT ELECTRODES TO PRODUCE OPPOSITE POLARITY SIGNALS FROM SAID OUTPUT ELECTRODES DURING NORMAL OPERATION, AND MEANS FOR SENSING WHEN SAID OUTPUT SIGNALS HAVE THE SAME POLARITY, DURING ABNORMAL OPERATION, AND FOR INTERRUPTING THE OPERATION OF SAID SWITCH DEVICES, THE LAST-MENTIONED MEANS COMPRISING A RELAY HAVING A PAIR OF WINDINGS CONNECTED TO SAID OUTPUT ELECTRODES, RESPECTIVELY, AND A SWITCH CONTROLLED JOINTLY BY SAID WINDINGS.
Claim 2
Dependent Claim
119 words
APPARATUS OF THE TYPE DESCRIBED, COMPRISING A PAIR OF ELECTRIC SWITCH DEVICES EACH HAVING A COMMON ELECTRODE, AN INPUT ELECTRODE, AND AN OUTPUT ELECTRODE, A WINDING CONNECTED BETWEEN SAID OUTPUT ELECTRODES, MEANS FOR CONNECTING AN ELECTRIC SUPPLY BETWEEN SAID COMMON ELECTRODES AND A POINT ON SAID WINDING, MEANS FOR APPLYING PUSH-PULL ELECTRIC DRIVE SIGNALS TO SAID INPUT ELECTRODES TO PRODUCE OPPOSITE POLARITY SIGNALS FROM SAID OUTPUT ELECTRODES DURING NORMAL OPERATION, AND MEANS FOR SENSING WHEN SAID OUTPUT SIGNALS HAVE THE SAME POLARITY, DURING ABNORMAL OPERATION, AND FOR INTERRUPTING THE OPERATION OF SAID SWITCH DEVICES, THE LAST-MENTIONED MEANS COMPRISING A RELAY HAVING A PAIR OF WINDINGS CONNECTED TO SAID OUTPUT ELECTRODES, RESPECTIVELY, AND A SWITCH CONTROLLED JOINTLY BY SAID WINDINGS.
References Cited (Backward Citations)
US1975812A
Cited
US2995690A
Cited
US3098958A
Cited
US3026455A
Cited
US3161834A
Cited
US3188529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |