US3206642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuit breakers
Assignee: National Research Development Corp UK
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Filing: 1962-07-17
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Granted: 1965-09-14
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Expires: 1982-07-17
Abstract
No abstract record available.
Inventors
- 👤 Farvis William Ewart John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
H; H01; H01H; H01H5/00; H01H5/04; H01H9/00; H01H9/54; H01H9/56; H03; H03M; H03M1/00; H03M1/06; H03M1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
APPARATUS FOR CONTROLLING THE INSTANT OF OPERATION OF A CIRCUIT-BREAKER OPERABLE IN RESPONSE TO A CONTROL SIGNAL TO INTERRUPT THE CURRENT OF AN ALTERNATING SIGNAL COMPRISING: MEANS RESPONSIVE TO THE ALTERNATING SIGNAL FOR DEVELOPING A FIST OUTPUT SIGNAL REPRESENTATIVE OF THE PHASE OF THE ALTERNATING CURRENT WITH RESPECT TO THE ALTERNATING VOLTAGE OF SAID ALTERNATING SIGNAL, MEANS RESPONSIVE TO SAID ALTERNATING CURRENT FOR DEVELOPING A SECOND OUTPUT SIGNAL REPRESENTING THE AMPLITUDE OF THE ALTERNATING CURRENT, AND MEANS RESPONSIVE TO SAID FIRST AND SECOND OUTPUT SIGNALS FOR DETERMINING THE OPTIMUM TIME INSTANT AT WHICH THE CIRCUIT-BREAKER SHOULD BE OPERABLE BEFORE A CURRENT ZERO AND FOR PROVIDING A CONTROL SIGNAL TO OPERATE THE CIRCUIT-BREAKER AT THE INSTANTANEOUS OPTIMUM TIME AFTER THE DETERMINED CURRENT ZERO.
Claim 2
Dependent Claim
122 words
APPARATUS FOR CONTROLLING THE INSTANT OF OPERATION OF A CIRCUIT-BREAKER OPERABLE IN RESPONSE TO A CONTROL SIGNAL TO INTERRUPT THE CURRENT OF AN ALTERNATING SIGNAL COMPRISING: MEANS RESPONSIVE TO THE ALTERNATING SIGNAL FOR DEVELOPING A FIST OUTPUT SIGNAL REPRESENTATIVE OF THE PHASE OF THE ALTERNATING CURRENT WITH RESPECT TO THE ALTERNATING VOLTAGE OF SAID ALTERNATING SIGNAL, MEANS RESPONSIVE TO SAID ALTERNATING CURRENT FOR DEVELOPING A SECOND OUTPUT SIGNAL REPRESENTING THE AMPLITUDE OF THE ALTERNATING CURRENT, AND MEANS RESPONSIVE TO SAID FIRST AND SECOND OUTPUT SIGNALS FOR DETERMINING THE OPTIMUM TIME INSTANT AT WHICH THE CIRCUIT-BREAKER SHOULD BE OPERABLE BEFORE A CURRENT ZERO AND FOR PROVIDING A CONTROL SIGNAL TO OPERATE THE CIRCUIT-BREAKER AT THE INSTANTANEOUS OPTIMUM TIME AFTER THE DETERMINED CURRENT ZERO.
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |