Patent US3365651A successfully refreshed from Google Patents.
US3365651A
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Apparatus and method for synchronizing an inverter to a source of a.c. power
Assignee: Lorain Products Corp
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Filing: 1964-01-16
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Granted: 1968-01-23
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Expires: 1984-01-16
Abstract
No abstract record available.
Inventors
- 👤 Paul E Rolfes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:59
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/081; H02P; H02P9/00; H02P9/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN OSCILLATOR AND SYNCHRONIZING CIRCUIT ADAPTED TO BE EMPLOYED IN CONJUNCTION WITH A SOURCE OF A.C. POWER, WHICH COMPRISES: A RELAXATION OSCILLATOR HAVING A SERIES-CONNECTED RESISTOR AND CAPACITOR ADAPTED TO DETERMINE THE FREERUNNING FREQUENCY OF OSCILLATION, SAID RELAXATION OSCILLATOR BEING ADAPTED TO BE CONNECTED TO A D.C. VOLTAGE SOURCE, SAID RESISTOR AND CAPACITOR HAVING SUCH MAGNITUDES THAT SAID FREE-RUNNING FREQUENCY IS SUBSTANTIALLY EQUAL TO THE FREQUENCY OF AN A.C. POWER SOURCE TO WHICH IT IS DESIRED TO SYNCHRONIZE SAID OSCILLATOR, A SECOND RESISTOR CONNECTED IN SERIES BETWEEN SAID FIRSTMENTIONED RESISTOR AND SAID D.C. VOLTAGE SOURCE FROM WHICH SAID CAPACITOR IS CHARGED, WHEREBY AN INCREASE IN THE RATE OF CURRENT FLOW THROUGH SAID SECOND RESISTOR INCREASES THE VOLTAGE DROP THEREACROSS,
Claim 2
Dependent Claim
119 words
AN OSCILLATOR AND SYNCHRONIZING CIRCUIT ADAPTED TO BE EMPLOYED IN CONJUNCTION WITH A SOURCE OF A.C. POWER, WHICH COMPRISES: A RELAXATION OSCILLATOR HAVING A SERIES-CONNECTED RESISTOR AND CAPACITOR ADAPTED TO DETERMINE THE FREERUNNING FREQUENCY OF OSCILLATION, SAID RELAXATION OSCILLATOR BEING ADAPTED TO BE CONNECTED TO A D.C. VOLTAGE SOURCE, SAID RESISTOR AND CAPACITOR HAVING SUCH MAGNITUDES THAT SAID FREE-RUNNING FREQUENCY IS SUBSTANTIALLY EQUAL TO THE FREQUENCY OF AN A.C. POWER SOURCE TO WHICH IT IS DESIRED TO SYNCHRONIZE SAID OSCILLATOR, A SECOND RESISTOR CONNECTED IN SERIES BETWEEN SAID FIRSTMENTIONED RESISTOR AND SAID D.C. VOLTAGE SOURCE FROM WHICH SAID CAPACITOR IS CHARGED, WHEREBY AN INCREASE IN THE RATE OF CURRENT FLOW THROUGH SAID SECOND RESISTOR INCREASES THE VOLTAGE DROP THEREACROSS,
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) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |