US3295018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1963-05-21
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Granted: 1966-12-27
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Expires: 1983-05-21
Abstract
No abstract record available.
Inventors
- 👤 Richard F Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:35
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
271 words
IN A PROTECTIVE AND CONTROL SYSTEM FOR ELECTRICAL APPARATUS HAVING AT LEAST TWO OUTPUT CONDUCTORS, THE COMBINATION COMPRISING FIRST AND SECOND MEANS RESPONSIVE TO THE MAGNITUDE OF CURRENT IN SAID OUTPUT CONDUCTORS, SAID FIRST AND SECOND MEANS EACH HAVING CONTACTS THAT CLOSE WHEN SAID CURRENT REACHES PRESET MAGNITUDES, THIRD MEANS RESPONSIVE TO THE DIRECTION OF ENERGY FLOW IN SAID OUTPUT CONDUCTORS, SAID THIRD MEANS HAVING CONTACTS THAT OPEN WHEN ENERGY IS FLOWING IN ONE DIRECTION AND CLOSE WHEN ENERGY IS FLOWING IN THE REVERSE DIRECTION, FOURTH MEANS RESPONSIVE TO THE DIFFERENCE BETWEEN THE POTENTIAL OF SAID ELECTRICAL APPARATUS AND THE POTENTIAL OF AN ELECTRICAL CIRCUIT TO WHICH SAID ELECTRICAL APPARATUS IS TO SUPPLY ENERGY, SAID FOURTH MEANS HAVING CONTACTS THAT CLOSE WHEN SAID POTENTIAL DIFFERENCE WOULD CAUSE ENERGY TO FLOW IN ONE DIRECTION IN SAID OUTPUT CONDUCTORS THAT CLOSE WHEN SAID POTENTIAL DIFFERENCE WOULD CAUSE SAID ENERGY TO FLOW IN THE REVERSE DIRECTION, AND FIFTH MEANS PROVIDING A CONTROL VOLTAGE, THE CONTACTS OF SAID FIRST MEANS BEING CONNECTED IN CIRCUIT RELATION WITH SAID FIFTH MEANS AND CAUSING A CIRCUIT INTERRUPTING DEVICE TO OPEN AN ELECTRICAL CIRCUIT WHEN THE CONTACTS OF SAID FIRST MEANS CLOSE, THE CONTACTS OF SAID SECOND MEANS BEING CONNECTED IN CIRCUIT RELATION WITH SAID FIFTH MEANS AND THE CONTACTS OF SAID THIRD MEANS AND CAUSING A CIRCUIT INTERRUPTING DEVICE TO OPEN AN ELECTRICAL CIRCUIT WHEN THE CONTACTS OF SAID SECOND AND THIRD MEANS CLOSE, THE CONTACTS OF SAID FOURTH MEANS BEING CONNECTED IN CIRCUIT RELATION WITH SAID FIFTH MEANS AND CAUSING A CIRCUIT INTERRUPTING DEVICE TO COMPLETE AN ELECTRICAL CIRCUIT WHEN THE CONTACTS OF SAID FOURTH MEANS CLOSE.
Claim 2
Dependent Claim
271 words
IN A PROTECTIVE AND CONTROL SYSTEM FOR ELECTRICAL APPARATUS HAVING AT LEAST TWO OUTPUT CONDUCTORS, THE COMBINATION COMPRISING FIRST AND SECOND MEANS RESPONSIVE TO THE MAGNITUDE OF CURRENT IN SAID OUTPUT CONDUCTORS, SAID FIRST AND SECOND MEANS EACH HAVING CONTACTS THAT CLOSE WHEN SAID CURRENT REACHES PRESET MAGNITUDES, THIRD MEANS RESPONSIVE TO THE DIRECTION OF ENERGY FLOW IN SAID OUTPUT CONDUCTORS, SAID THIRD MEANS HAVING CONTACTS THAT OPEN WHEN ENERGY IS FLOWING IN ONE DIRECTION AND CLOSE WHEN ENERGY IS FLOWING IN THE REVERSE DIRECTION, FOURTH MEANS RESPONSIVE TO THE DIFFERENCE BETWEEN THE POTENTIAL OF SAID ELECTRICAL APPARATUS AND THE POTENTIAL OF AN ELECTRICAL CIRCUIT TO WHICH SAID ELECTRICAL APPARATUS IS TO SUPPLY ENERGY, SAID FOURTH MEANS HAVING CONTACTS THAT CLOSE WHEN SAID POTENTIAL DIFFERENCE WOULD CAUSE ENERGY TO FLOW IN ONE DIRECTION IN SAID OUTPUT CONDUCTORS THAT CLOSE WHEN SAID POTENTIAL DIFFERENCE WOULD CAUSE SAID ENERGY TO FLOW IN THE REVERSE DIRECTION, AND FIFTH MEANS PROVIDING A CONTROL VOLTAGE, THE CONTACTS OF SAID FIRST MEANS BEING CONNECTED IN CIRCUIT RELATION WITH SAID FIFTH MEANS AND CAUSING A CIRCUIT INTERRUPTING DEVICE TO OPEN AN ELECTRICAL CIRCUIT WHEN THE CONTACTS OF SAID FIRST MEANS CLOSE, THE CONTACTS OF SAID SECOND MEANS BEING CONNECTED IN CIRCUIT RELATION WITH SAID FIFTH MEANS AND THE CONTACTS OF SAID THIRD MEANS AND CAUSING A CIRCUIT INTERRUPTING DEVICE TO OPEN AN ELECTRICAL CIRCUIT WHEN THE CONTACTS OF SAID SECOND AND THIRD MEANS CLOSE, THE CONTACTS OF SAID FOURTH MEANS BEING CONNECTED IN CIRCUIT RELATION WITH SAID FIFTH MEANS AND CAUSING A CIRCUIT INTERRUPTING DEVICE TO COMPLETE AN ELECTRICAL CIRCUIT WHEN THE CONTACTS OF SAID FOURTH MEANS CLOSE.
References Cited (Backward Citations)
US2313942A
Cited
US2909708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |