US3210556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic paralleling system
Assignee: Westinghouse Electric Corp
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Filing: 1962-08-09
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Granted: 1965-10-05
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Expires: 1982-08-09
Abstract
No abstract record available.
Inventors
- 👤 William W Billings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:44
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/38; H02J3/40; H02J3/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A SYSTEM FOR EFFECTING PARALLELING OF AN ALTERNATING CURRENT GENERATOR WITH AN ENERGIZED LINE, SAID SYSTEM INCLUDING MEANS FOR SENSING THE PHASE DIFFERENCE BETWEEN THE GENERATOR AND THE LINE, SAID PHASE DIFFERENCE SENSING MEANS PROVIDING A SIGNAL VOLTAGE WHICH CHANGES ABRUPTLY WHEN THE PHASE DIFFERENCE COMES WITHIN PREDETERMINED LIMITS, MEANS FOR PRODUCING A CURRENT PULSE IN RESPONSE TO ABRUPT CHANGE OF SAID SIGNAL VOLTAGE, CONTROL MEANS OPERATIVELY UPON OCCURRENCE OF SAID CURRENT PULSE TO EFFECT CONNECTION OF THE GENERATOR TO THE LINE, MEANS FOR SENSING THE FREQUENCY DIFFERENCE BETWEEN THE GENERATOR AND THE LINE, SAID FREQUENCY DIFFERENCE SENSING MEANS PROVIDING A SIGNAL CURRENT WHEN THE FREQUENCY DIFFERENCE IS LESS THAN A PREDETERMINED AMOUNT, AND MEANS FOR PREVENTING OCCURRENCE OF SAID CURRENT PULSE IN THE ABSENCE OF SAID SIGNAL CURRENT.
Claim 2
Independent Claim
129 words
A SYSTEM FOR EFFECTING PARALLELING OF AN ALTERNATING CURRENT GENERATOR WITH AN ENERGIZED LINE, SAID SYSTEM INCLUDING MEANS FOR SENSING THE PHASE DIFFERENCE BETWEEN THE GENERATOR AND THE LINE, SAID PHASE DIFFERENCE SENSING MEANS PROVIDING A SIGNAL VOLTAGE WHICH CHANGES ABRUPTLY WHEN THE PHASE DIFFERENCE COMES WITHIN PREDETERMINED LIMITS, MEANS FOR PRODUCING A CURRENT PULSE IN RESPONSE TO ABRUPT CHANGE OF SAID SIGNAL VOLTAGE, CONTROL MEANS OPERATIVELY UPON OCCURRENCE OF SAID CURRENT PULSE TO EFFECT CONNECTION OF THE GENERATOR TO THE LINE, MEANS FOR SENSING THE FREQUENCY DIFFERENCE BETWEEN THE GENERATOR AND THE LINE, SAID FREQUENCY DIFFERENCE SENSING MEANS PROVIDING A SIGNAL CURRENT WHEN THE FREQUENCY DIFFERENCE IS LESS THAN A PREDETERMINED AMOUNT, AND MEANS FOR PREVENTING OCCURRENCE OF SAID CURRENT PULSE IN THE ABSENCE OF SAID SIGNAL CURRENT.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |