US3213347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state inverter
Assignee: Ovitron Corp
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Filing: 1963-01-30
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Granted: 1965-10-19
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Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Macklem F Sutherland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:12
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/497
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN INVERTER ADAPTED TO CONVERT DIRECT CURRENT TO ALTERNATING CURRENT OF A PREDETERMINED FREQUENCY, COMPRISING A SOURCE OF DIRECT CURRENT, FIRST AND SECOND TUNED CIRCUITS ADAPTED TO OSCILLATE AT FIRST AND SECOND OSCILLATING FREQUENCIES RESPECTIVELY, THE DIFFERENCE FREQUENCY BETWEEN SAID FIRST AND SECOND FREQUENCIES BEING EQUAL TO TWICE SAID PREDETERMINED FREQUENCY, MEANS INCLUDING SOLID STATE COMPONENTS FOR INTERRUPTING SAID DIRECT CURRENT INTO PULSATIONS OF DIRECT CURRENT AT A FREQUENCY APPROXIMATELY EQUAL TO ONE OF SAID OSCILLATING FREQUENCIES, MEANS FOR APPLYING SAID PULSATIONS OF DIRECT CURRENT TO SAID FIRST AND SECOND TUNED CIRCUITS RESPECTIVELY, WHEREBY SAID TUNED CIRCUITS ARE DRIVEN INTO OSCILLATION AT SAID FIRST AND SECOND FREQUENCIES RESPECTIVELY, MEANS FOR COMBINING THE OUTPUTS FROM SAID TUNED CIRCUITS TO PRODUCE A SUMMED WAVEFORM WHOSE ENVELOPE HAS SAID PREDETERMINED FREQUENCY, AND MEANS FOR SELECTING ALTERNATE HALVES OF SAID ENVELOPE TO PRODUCE A SINUSODIAL ALTERNATING CURRENT WAVEFORM OF SAID PREDETERMINED FREQUENCY.
Claim 2
Dependent Claim
148 words
AN INVERTER ADAPTED TO CONVERT DIRECT CURRENT TO ALTERNATING CURRENT OF A PREDETERMINED FREQUENCY, COMPRISING A SOURCE OF DIRECT CURRENT, FIRST AND SECOND TUNED CIRCUITS ADAPTED TO OSCILLATE AT FIRST AND SECOND OSCILLATING FREQUENCIES RESPECTIVELY, THE DIFFERENCE FREQUENCY BETWEEN SAID FIRST AND SECOND FREQUENCIES BEING EQUAL TO TWICE SAID PREDETERMINED FREQUENCY, MEANS INCLUDING SOLID STATE COMPONENTS FOR INTERRUPTING SAID DIRECT CURRENT INTO PULSATIONS OF DIRECT CURRENT AT A FREQUENCY APPROXIMATELY EQUAL TO ONE OF SAID OSCILLATING FREQUENCIES, MEANS FOR APPLYING SAID PULSATIONS OF DIRECT CURRENT TO SAID FIRST AND SECOND TUNED CIRCUITS RESPECTIVELY, WHEREBY SAID TUNED CIRCUITS ARE DRIVEN INTO OSCILLATION AT SAID FIRST AND SECOND FREQUENCIES RESPECTIVELY, MEANS FOR COMBINING THE OUTPUTS FROM SAID TUNED CIRCUITS TO PRODUCE A SUMMED WAVEFORM WHOSE ENVELOPE HAS SAID PREDETERMINED FREQUENCY, AND MEANS FOR SELECTING ALTERNATE HALVES OF SAID ENVELOPE TO PRODUCE A SINUSODIAL ALTERNATING CURRENT WAVEFORM OF SAID PREDETERMINED FREQUENCY.
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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |