Patent US3280810A successfully refreshed from Google Patents.
US3280810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor ignition system
Assignee: Motors Liquidation Co
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Filing: 1963-09-11
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Granted: 1966-10-25
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Expires: 1983-09-11
Abstract
No abstract record available.
Inventors
- 👤 William D Worrell
- 👤 David S Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:02
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/067; F02P7/0675; F02P3/00; F02P3/02; F02P3/04; F02P3/0407; F02P3/0435
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING, A SOURCE OF DIRECT CURRENT, A SEMICONDUCTOR CONTROL MEANS, AN IGNITION COIL HAVING A PRIMARY WINDING AND A SECONDARY WINDING, MEANS CONNECTING SAID PRIMARY WINDING AND SAID SEMICONDUCTOR CONTROL MEANS INSERIES WITH SAID SOURCE OF DIRECT CURRENT WHEREBY SAID SEMICONDUCTOR CONTROL MEANS CONTROLS THE CURRENT FLOW THROUGH SAID PRIMARY WINDING, A MAGNETIC DEVICE HAVING FIRST AND SECOND MAGNETICALLY COUPLED WINDINGS, A ROTATABLE MEANS FOR VARYING THE MAGNETIC COUPLING BETWEEN SAID WINDINGS DRIVEN BY SAID ENGINE, MEANS CONNECTING ONE OF SAID WINDINGS WITH SAID SEMICONDUCTOR CONTROL MEANS AND OPERATIVE TO CAUSE SAID SEMICONDUCTOR CONTROL MEANS TO SWITCH ON AND OFF IN TIMED RELATIONSHIP WITH ROTATION OF SAID ROTATABLE MEANS AND MEANS CONNECTING THE OTHER OF SAID WINDINGS WITH A SOURCE OF PULSATING CURRENT.
Claim 2
Dependent Claim
131 words
AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING, A SOURCE OF DIRECT CURRENT, A SEMICONDUCTOR CONTROL MEANS, AN IGNITION COIL HAVING A PRIMARY WINDING AND A SECONDARY WINDING, MEANS CONNECTING SAID PRIMARY WINDING AND SAID SEMICONDUCTOR CONTROL MEANS INSERIES WITH SAID SOURCE OF DIRECT CURRENT WHEREBY SAID SEMICONDUCTOR CONTROL MEANS CONTROLS THE CURRENT FLOW THROUGH SAID PRIMARY WINDING, A MAGNETIC DEVICE HAVING FIRST AND SECOND MAGNETICALLY COUPLED WINDINGS, A ROTATABLE MEANS FOR VARYING THE MAGNETIC COUPLING BETWEEN SAID WINDINGS DRIVEN BY SAID ENGINE, MEANS CONNECTING ONE OF SAID WINDINGS WITH SAID SEMICONDUCTOR CONTROL MEANS AND OPERATIVE TO CAUSE SAID SEMICONDUCTOR CONTROL MEANS TO SWITCH ON AND OFF IN TIMED RELATIONSHIP WITH ROTATION OF SAID ROTATABLE MEANS AND MEANS CONNECTING THE OTHER OF SAID WINDINGS WITH A SOURCE OF PULSATING CURRENT.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |