Patent US3295044A successfully refreshed from Google Patents.
US3295044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control apparatus for inverter systems
Assignee: Westinghouse Electric Corp
•
Filing: 1963-07-18
•
Granted: 1966-12-27
•
Expires: 1983-07-18
Abstract
No abstract record available.
Inventors
- 👤 Eugene R Pledger
- 👤 Boro Churchill
- 👤 Frank J Prines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:05
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/497
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
AN ELECTRIC CIRCUIT COMPRISING FIRST MEANS PRODUCING FIRST AND SECOND ALTERNATING PHASE POTENTIALS, SECOND MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIRST MEANS PRODUCING FIRST, SECOND AND THIRD ALTERNATING LINE POTENTIALS, SAID FIRST ALTERNATING LINE POTENTIAL BEING THE SAME AS SAID FIRST ALTERNATING PHASE POTENTIAL, FIRST REGULATING MEANS MAINTAINING SAID FIRST ALTERNATING PHASE POTENTIAL SUBSTANTIALLY CONSTANT, SECOND REGULATING MEANS SENSING THE SECOND LINE POTENTIAL AND MAINTAINING SAID SECOND LINE POTENTIAL SUBSTANTIALLY EQUAL TO SAID FIRST LINE POTENTIAL BY REGULATING THE MAGNITUDE OF SAID SECOND ALTERNATING PHASE POTENTIAL, THIRD MEANS CONNECTED IN CIRCUIT RELATION WITH SAID SECOND MEANS RECTIFYING SAID SECOND AND THIRD ALTERNATING LINE POTENTIALS, FOURTH MEANS CONNECTED IN CIRCUIT RELATION WITH SAID THIRD MEANS PRODUCING A SIGNAL RESPONSIVE TO ANY DIFFERENCE IN THE MAGNITUDES OF SAID RECTIFIED SECOND AND THIRD ALTERNATING LINE POTENTIALS, FIFTH MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIRST AND FOURTH MEANS REGULATING THE PHASE ANGLE BETWEEN SAID FIRST AND SECOND ALTERNATING PHASE POTENTIALS IN RESPONSE TO SAID SIGNAL AND MAINTAINING SAID SECOND AND THIRD ALTERNATING LINE POTENTIALS SUBSTANTIALLY EQUAL TO EACH OTHER.
Claim 2
Dependent Claim
177 words
AN ELECTRIC CIRCUIT COMPRISING FIRST MEANS PRODUCING FIRST AND SECOND ALTERNATING PHASE POTENTIALS, SECOND MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIRST MEANS PRODUCING FIRST, SECOND AND THIRD ALTERNATING LINE POTENTIALS, SAID FIRST ALTERNATING LINE POTENTIAL BEING THE SAME AS SAID FIRST ALTERNATING PHASE POTENTIAL, FIRST REGULATING MEANS MAINTAINING SAID FIRST ALTERNATING PHASE POTENTIAL SUBSTANTIALLY CONSTANT, SECOND REGULATING MEANS SENSING THE SECOND LINE POTENTIAL AND MAINTAINING SAID SECOND LINE POTENTIAL SUBSTANTIALLY EQUAL TO SAID FIRST LINE POTENTIAL BY REGULATING THE MAGNITUDE OF SAID SECOND ALTERNATING PHASE POTENTIAL, THIRD MEANS CONNECTED IN CIRCUIT RELATION WITH SAID SECOND MEANS RECTIFYING SAID SECOND AND THIRD ALTERNATING LINE POTENTIALS, FOURTH MEANS CONNECTED IN CIRCUIT RELATION WITH SAID THIRD MEANS PRODUCING A SIGNAL RESPONSIVE TO ANY DIFFERENCE IN THE MAGNITUDES OF SAID RECTIFIED SECOND AND THIRD ALTERNATING LINE POTENTIALS, FIFTH MEANS CONNECTED IN CIRCUIT RELATION WITH SAID FIRST AND FOURTH MEANS REGULATING THE PHASE ANGLE BETWEEN SAID FIRST AND SECOND ALTERNATING PHASE POTENTIALS IN RESPONSE TO SAID SIGNAL AND MAINTAINING SAID SECOND AND THIRD ALTERNATING LINE POTENTIALS SUBSTANTIALLY EQUAL TO EACH OTHER.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |