Patent US3401574A successfully refreshed from Google Patents.
Patent US3249813A successfully refreshed from Google Patents.
US3249813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid reinsertion protection system for series capacitor bank
Assignee: ABB Inc USA
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Filing: 1963-02-18
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Granted: 1966-05-03
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Expires: 1983-02-18
Abstract
No abstract record available.
Inventors
- 👤 Murray K Price
- 👤 Brian J Gilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:49
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/06; H02H3/066; H02H7/00; H02H7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN AN ELECTRICAL DISTRIBUTION SYSTEM, A SERIES CAPACITOR INSTALLATION COMPRISING A CAPACITOR BANK TO BE SERIES CONNECTED TO AN ALTERNATING CURRENT LINE, A SPARK GAP MEANS IN SHUNT CIRCUIT RELATIONSHIP WITH RESPECT TO SAID CAPACITOR BANK TO BREAK DOWN AND IMMEDIATELY BECOME CONDUCTING WHEN SUBJECTED TO AN INSTANTANEOUS FAULT VOLTAGE IN EXCESS OF A PREDETERMINED LEVEL; A BYPASS SERIES CIRCUIT IN SHUNT CIRCUIT RELATIONSHIP WITH RESPECT TO BOTH SAID CAPACITOR BANK AND SAID SPARK GAP MEANS; SAID BYPASS SERIES CIRCUIT INCLUDING A FIRST NORMALLY OPEN SWITCH MEANS AND A SECOND NORMALLY CLOSED SWITCH MEANS; EACH OF SAID SWITCH MEANS QUICKLY OPERABLE TO ITS OTHER POSITION RESPONSIVE TO PREDETERMINED CIRCUIT CONDITIONS; SAID FIRST SWITCH MEANS OPERABLE TO ITS CLOSED POSITION RESPONSIVE TO SAID SPARK GAP MEANS CONDUCTING SO THAT SAID SERIES BYPASS CIRCUIT IS COMPLETED TO EXTINGUISH THE ARC ACROSS SAID SPARK GAP MEANS; SAID SECOND SWITCH MEANS OPERABLE TO ITS OPEN POSITION RESPONSIVE TO SAID FIRST SWITCH MEANS BEING CLOSED AND A PREDETERMINED FAULT CONDITION BEING CLEARED UP, SO
Claim 2
Dependent Claim
169 words
IN AN ELECTRICAL DISTRIBUTION SYSTEM, A SERIES CAPACITOR INSTALLATION COMPRISING A CAPACITOR BANK TO BE SERIES CONNECTED TO AN ALTERNATING CURRENT LINE, A SPARK GAP MEANS IN SHUNT CIRCUIT RELATIONSHIP WITH RESPECT TO SAID CAPACITOR BANK TO BREAK DOWN AND IMMEDIATELY BECOME CONDUCTING WHEN SUBJECTED TO AN INSTANTANEOUS FAULT VOLTAGE IN EXCESS OF A PREDETERMINED LEVEL; A BYPASS SERIES CIRCUIT IN SHUNT CIRCUIT RELATIONSHIP WITH RESPECT TO BOTH SAID CAPACITOR BANK AND SAID SPARK GAP MEANS; SAID BYPASS SERIES CIRCUIT INCLUDING A FIRST NORMALLY OPEN SWITCH MEANS AND A SECOND NORMALLY CLOSED SWITCH MEANS; EACH OF SAID SWITCH MEANS QUICKLY OPERABLE TO ITS OTHER POSITION RESPONSIVE TO PREDETERMINED CIRCUIT CONDITIONS; SAID FIRST SWITCH MEANS OPERABLE TO ITS CLOSED POSITION RESPONSIVE TO SAID SPARK GAP MEANS CONDUCTING SO THAT SAID SERIES BYPASS CIRCUIT IS COMPLETED TO EXTINGUISH THE ARC ACROSS SAID SPARK GAP MEANS; SAID SECOND SWITCH MEANS OPERABLE TO ITS OPEN POSITION RESPONSIVE TO SAID FIRST SWITCH MEANS BEING CLOSED AND A PREDETERMINED FAULT CONDITION BEING CLEARED UP, SO
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |