Patent US3176190A successfully refreshed from Google Patents.
US3176190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase-comparison protective relaying system
Assignee: General Electric Co
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Filing: 1960-12-16
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Granted: 1965-03-30
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Expires: 1980-12-16
Abstract
No abstract record available.
Inventors
- 👤 Merwyn E Hodges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:40
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/28; H02H3/30; H02H3/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A FAULT RESPONSIVE PROTECTIVE RELAYING SYSTEM FOR AN ALTERNATING CURRENT ELECTRIC POWER TRANSMISSION LINE: SIGNAL TRANSMITTING MEANS FOR SENDING A SIGNAL FROM A LOCAL TERMINAL TO A REMOTE TERMINAL OF THE TRANSMISSION LINE; SIGNAL RECEIVING MEANS OPERATIVE IN RESPONSE TO A SIGNAL BEING SENT FROM SAID REMOTE TERMINAL TO SAID LOCAL TERMINAL; MEANS FOR INITIATING OPERATION OF THE TRANSMITTING MEANS IN RESPONSE TO THE OCCURRENCE OF ANY LINE FAULT BETWEEN SAID LOCAL AND REMOTE TERMINALS; MEANS ADAPTED TO BE COUPLED TO THE LINE AT SAID LOCAL TERMINAL FOR DERIVING A SINGLE-PHASE ALTERNATING ELECTRIC QUANTITY REPRESENTATIVE OF LINE CURRENTS UNDER FAULT CONDITIONS; AND MEANS CONTROLLED BY SAID REPRESENTATIVE QUANTITY FOR CONCURRENTLY STOPPING OPERATION OF THE TRANSMITTING MEANS AND INITIATING A PREDETERMINED RELAYING OPERATION ONLY WHEN THE REPRESENTATIVE QUANTITY HAS A PREDETERMINED POLARITY, SAID RECEIVING MEANS BEING CONNECTING AND ARRANGED TO PREVENT SAID RELAYING OPERATION WHEN THE RECEIVING MEANS IS OPERATIVE.
Claim 2
Dependent Claim
150 words
IN A FAULT RESPONSIVE PROTECTIVE RELAYING SYSTEM FOR AN ALTERNATING CURRENT ELECTRIC POWER TRANSMISSION LINE: SIGNAL TRANSMITTING MEANS FOR SENDING A SIGNAL FROM A LOCAL TERMINAL TO A REMOTE TERMINAL OF THE TRANSMISSION LINE; SIGNAL RECEIVING MEANS OPERATIVE IN RESPONSE TO A SIGNAL BEING SENT FROM SAID REMOTE TERMINAL TO SAID LOCAL TERMINAL; MEANS FOR INITIATING OPERATION OF THE TRANSMITTING MEANS IN RESPONSE TO THE OCCURRENCE OF ANY LINE FAULT BETWEEN SAID LOCAL AND REMOTE TERMINALS; MEANS ADAPTED TO BE COUPLED TO THE LINE AT SAID LOCAL TERMINAL FOR DERIVING A SINGLE-PHASE ALTERNATING ELECTRIC QUANTITY REPRESENTATIVE OF LINE CURRENTS UNDER FAULT CONDITIONS; AND MEANS CONTROLLED BY SAID REPRESENTATIVE QUANTITY FOR CONCURRENTLY STOPPING OPERATION OF THE TRANSMITTING MEANS AND INITIATING A PREDETERMINED RELAYING OPERATION ONLY WHEN THE REPRESENTATIVE QUANTITY HAS A PREDETERMINED POLARITY, SAID RECEIVING MEANS BEING CONNECTING AND ARRANGED TO PREVENT SAID RELAYING OPERATION WHEN THE RECEIVING MEANS IS OPERATIVE.
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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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |