US3564393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit using capacitor and switch on primary winding of transformer for regulating voltage on secondary winding of transformer
Assignee: Boeing North American Inc
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Filing: 1969-03-12
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Granted: 1971-02-16
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Expires: 1989-03-12
Abstract
Abstract A SYSTEM DETECTS CHANGES IN THE OUTPUT VOLTAGE ON THE INPUT SIDE OF A TRANSFORMER USED BY THE SYSTEM AND GENERATES A CONTROL SIGNAL IN RESPONSE TO THE CHANGE FOR CHANGING THE POWER TRANSFERRED TO THE OUTPUT SIDE OF THE TRANSFORMER. THE INPUT AND OUTPUT HAVE GROUND ISOLATION. AS A RESULT OF CONTROLLING THE POWER TRANSFERRED TO THE OUTPUT SIDE, THE OUTPUT VOLTAGE IS MAINTAINED AT A CONSTANT LEVEL.
Inventors
- 👤 James A Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:25
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/33507; H02M3/33523
Claims Analysis
Total Claims: 0
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |