US3218516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective relays
Assignee: Westinghouse Electric Corp
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Filing: 1962-10-22
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Granted: 1965-11-16
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Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Robert L Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:37
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/04; H02H7/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A PROTECTIVE ARRANGEMENT FOR AN ALTERNATING CURRENT SYSTEM HAVING TERMINALS THROUGH WHICH ALTERNATING CURRENT NORMALLY ENTERS AND LEAVES THE SYSTEM, OPERATING RECTIFYING MEANS HAVING A DIRECT ELECTRIC OPERATING OUTPUT DEPENDENT ON A FUNCTION OF THE DIFFERENCE BETWEEN ALTERNATING CURRENT ENTERING AND LEAVING THE SYSTEM THROUGH SAID TERMINALS, RESTRAINT RECTIFYING MEANS HAVING A DIRECT ELECTRIC RESTRICT OUTPUT DEPENDENT ON A FUNCTION OF THE SUM OF CURRENTS ENTERING AND LEAVING THE SYSTEM THROUGH THE TERMINALS, AND PROTECTIVE TRANSLATING MEANS INDEPENDENTLY RESPONSIVE TO THE DIFFERENCE BETWEEN THE OPERATING AND RESTRAINT OUTPUTS AND TO SAID DIRECT ELECTRIC OPERATING OUTPUT.
Claim 2
Dependent Claim
96 words
IN A PROTECTIVE ARRANGEMENT FOR AN ALTERNATING CURRENT SYSTEM HAVING TERMINALS THROUGH WHICH ALTERNATING CURRENT NORMALLY ENTERS AND LEAVES THE SYSTEM, OPERATING RECTIFYING MEANS HAVING A DIRECT ELECTRIC OPERATING OUTPUT DEPENDENT ON A FUNCTION OF THE DIFFERENCE BETWEEN ALTERNATING CURRENT ENTERING AND LEAVING THE SYSTEM THROUGH SAID TERMINALS, RESTRAINT RECTIFYING MEANS HAVING A DIRECT ELECTRIC RESTRICT OUTPUT DEPENDENT ON A FUNCTION OF THE SUM OF CURRENTS ENTERING AND LEAVING THE SYSTEM THROUGH THE TERMINALS, AND PROTECTIVE TRANSLATING MEANS INDEPENDENTLY RESPONSIVE TO THE DIFFERENCE BETWEEN THE OPERATING AND RESTRAINT OUTPUTS AND TO SAID DIRECT ELECTRIC OPERATING OUTPUT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |