Patent US3290581A successfully refreshed from Google Patents.
US3290581A
Expired / Lapsed
US
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Bridge type sine wave generator
Assignee: Westinghouse Electric Corp
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Filing: 1963-06-28
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Granted: 1966-12-06
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
- 👤 Edward H Hooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:00
CPC Classifications
H; H03; H03B; H03B11/00; H03B11/04; H03B11/10; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/523
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
A SINE WAVE GENERATOR COMPRISING IN COMBINATION: AN INDUCTANCE-CAPACITANCE CIRCUIT COMBINATION ADAPTED TO BE RESONANTLY CHARGED AND DISCHARGED FROM A D.C. SOURCE; AT LEAST FOUR SEMICONCONDUCTOR SWITCHES ARRANGED IN A BRIDGE CIRCUIT, BEING SELECTIVELY OPERABLE IN PAIRS AND COUPLED TO THE CAPACITANCE CIRCUIT COMBINATION TO ALTERNATLY REVERSE THE ELECTRICAL CHARGE ON THE CAPACITANCE OF SAID INDUCTANCE-CAPACITANCE CIRCUIT COMBINATION AT PREDETERMINED INTERVALS; AND A TUNED LOAD CIRCUIT COUPLED TO SAID INDUCTANCE-CAPACITANCE CIRCUIT COMBINATION, BEING ENERGIZED BY THE CHARGE REVERSAL OF SAID CAPACITANCE TO SUSTAIN OSCILLATIONS AT A PREDETERMINED OUTPUT FREQUENCY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |