Patent US3284637A successfully refreshed from Google Patents.
US3284637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor choppers
Assignee: Airpax Electronics Inc
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Filing: 1962-07-16
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Granted: 1966-11-08
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Expires: 1982-07-16
Abstract
No abstract record available.
Inventors
- 👤 Jon R Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:18
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/62; H03K17/6285; H03F; H03F3/00; H03F3/38; H03F3/387; H03K17/601
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A TRANSISTOR CHOPPER FOR APPLYING A LEVEL OF ELECTRICAL ENERGY TO A LOAD COMPRISING INPUT TERMINALS CONNECTED FOR RECEIVING AND PASSING A CURRENT THROUGH A CIRCUIT BETWEEN THE INPUT TERMINALS, SAID CIRCUIT INCLUDING A TRANSISTOR OSCILLATION CIRCUIT HAVING A COLLECTER CONNECTED TO DRIVE THE OSCILLATION CIRCUIT, SAID OSCILLATION CIRCUIT HAVING AN INDUCTANCE COMPONENT, A SUBSTANTIAL PORTION OF THE INDUCTANCE COMPONENT INCLUDING ONE CONDUCTOR OF A BIFILAR WINDING AND FORMING A PRIMARY, SAID BIFILAR WINDING BEING WOUND ON A CORE FOR FORMING A TRANSFORMER HAVING A PAIR OF CONDUCTORS IN A COMMON INSULATION MATERIAL AND IN WHICH ONE CONDUCTOR HAS GENERALLY A ONE-TO-ONE TURN RATIO WITH THE OTHER CONDUCTOR OF THE BIFILAR WINDING, SAID OTHER CONDUCTOR FORMING A SECONDARY, A RECTIFIER-FILTER NETWORK CONNECTED TO SAID OTHER CONDUCTOR FOR PRODUCING A D.C. OUTPUT, AND SEMICONDUCTOR SWITCH ELEMENTS FOR PASSING A D.C. SIGNAL APPLIED TO AN OUTPUT TERMINAL TO SAID LOAD.
Claim 2
Dependent Claim
148 words
A TRANSISTOR CHOPPER FOR APPLYING A LEVEL OF ELECTRICAL ENERGY TO A LOAD COMPRISING INPUT TERMINALS CONNECTED FOR RECEIVING AND PASSING A CURRENT THROUGH A CIRCUIT BETWEEN THE INPUT TERMINALS, SAID CIRCUIT INCLUDING A TRANSISTOR OSCILLATION CIRCUIT HAVING A COLLECTER CONNECTED TO DRIVE THE OSCILLATION CIRCUIT, SAID OSCILLATION CIRCUIT HAVING AN INDUCTANCE COMPONENT, A SUBSTANTIAL PORTION OF THE INDUCTANCE COMPONENT INCLUDING ONE CONDUCTOR OF A BIFILAR WINDING AND FORMING A PRIMARY, SAID BIFILAR WINDING BEING WOUND ON A CORE FOR FORMING A TRANSFORMER HAVING A PAIR OF CONDUCTORS IN A COMMON INSULATION MATERIAL AND IN WHICH ONE CONDUCTOR HAS GENERALLY A ONE-TO-ONE TURN RATIO WITH THE OTHER CONDUCTOR OF THE BIFILAR WINDING, SAID OTHER CONDUCTOR FORMING A SECONDARY, A RECTIFIER-FILTER NETWORK CONNECTED TO SAID OTHER CONDUCTOR FOR PRODUCING A D.C. OUTPUT, AND SEMICONDUCTOR SWITCH ELEMENTS FOR PASSING A D.C. SIGNAL APPLIED TO AN OUTPUT TERMINAL TO SAID LOAD.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |