US3327129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parametrically excited oscillator
Assignee: Unisys Corp
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Filing: 1963-04-08
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Granted: 1967-06-20
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Donald T Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:23
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/19; G11C11/20; H; H03; H03K; H03K3/00; H03K3/02; H03K3/45; H03K3/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN COMBINATION, TRANSFORMER MEANS INCLUDING PRIMARY WINDING MEANS, EXCITING SAID PRIMARY WINDING MEANS CONSISTING OF AN ALTERNATING CURRENT PUMP SOURCE OF FREQUENCY F, AND SECONDARY WINDING MEANS INCLUDING A PAIR OF WINDINGS, SAID PAIR OF WINDINGS BEING COUPLED TOGETHER IN A MANNER TO CANCEL VOLTAGES INDUCED THEREIN BY ACTION OF VOLTAGE CHANGES IN SAID PRIMARY WINDING MEANS; AND A CAPACITOR COUPLED ACROSS SAID SECONDARY WINDING MEANS, THE VALUE OF SAID CAPACITOR AND THE INDUCTANCE OF SAID SECONDARY WINDING MEANS FORMING A TUNED CIRCUIT RESONANT AT THE FREQUENT F.
Claim 2
Dependent Claim
88 words
IN COMBINATION, TRANSFORMER MEANS INCLUDING PRIMARY WINDING MEANS, EXCITING SAID PRIMARY WINDING MEANS CONSISTING OF AN ALTERNATING CURRENT PUMP SOURCE OF FREQUENCY F, AND SECONDARY WINDING MEANS INCLUDING A PAIR OF WINDINGS, SAID PAIR OF WINDINGS BEING COUPLED TOGETHER IN A MANNER TO CANCEL VOLTAGES INDUCED THEREIN BY ACTION OF VOLTAGE CHANGES IN SAID PRIMARY WINDING MEANS; AND A CAPACITOR COUPLED ACROSS SAID SECONDARY WINDING MEANS, THE VALUE OF SAID CAPACITOR AND THE INDUCTANCE OF SAID SECONDARY WINDING MEANS FORMING A TUNED CIRCUIT RESONANT AT THE FREQUENT F.
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |