US3216408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic circuit
Assignee: Motorola Solutions Inc
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Filing: 1964-02-13
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Granted: 1965-11-09
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Expires: 1984-02-13
Abstract
No abstract record available.
Inventors
- 👤 Theodore A Byles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:00
CPC Classifications
F; F02; F02P; F02P15/00; F02P15/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE INCLUDING IN COMBINATION, A BALLAST RESISTOR, AN IGNITION COIL FOR SUPPLYING HIGH VOLTAGE FIRING PULSES TO THE ENGINE, SWITCH MEANS OPERABLE IN SYNCHRONISM WITH THE ENGINE TO BE CLOSED FOR A PERIOD OF TIME WHICH IS INVERSELY PROPORTIONAL TO THE SPEED OF THE ENGINE CONDUCTOR MEANS FOR CONNECTING SAID BALLAST RESISTOR AND SAID IGNITION COIL AND SAID SWITCH MEANS IN SERIES ACROSS A SOURCE OF POTENTIAL, SAID CONTROL MEANS FOR INTERMITTENTLY BYPASSING SAID BALLAST RESISTOR TO CONDUCT INCREASED CURRENT TO SAID IGNITION COIL FOR A PORTION OF THE PERIOD DURING WHICH SAID SWITCH MEANS IS CLOSE, SAID CONTROL MEANS COMPRISING A SEMICONDUCTOR SWITCH CONNECTED IN PARALLEL WITH SAID BALLAST RESISTOR, AND FURTHER COMPRISING BIAS MEANS CONNECTED TO SAID SEMICONDUCTOR SWITCH FOR CLOSING THE SAME FOR A PREDETERMINED TIME DURING THE INITIAL PART OF THE PERIOD DURING WHICH SAID SWITCH MEANS IS CLOSED, SAID SEMICONDUCTOR SWITCH WHEN CLOSED BYPASSING SAID BALLAST RESISTOR TO PROVIDE RAPID BUILD UP OF CURRENT IN SAID IGNITION COIL FOR IMPROVED HIGH VOLTAGE AT HIGH SPEED.
Claim 2
Dependent Claim
177 words
AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE INCLUDING IN COMBINATION, A BALLAST RESISTOR, AN IGNITION COIL FOR SUPPLYING HIGH VOLTAGE FIRING PULSES TO THE ENGINE, SWITCH MEANS OPERABLE IN SYNCHRONISM WITH THE ENGINE TO BE CLOSED FOR A PERIOD OF TIME WHICH IS INVERSELY PROPORTIONAL TO THE SPEED OF THE ENGINE CONDUCTOR MEANS FOR CONNECTING SAID BALLAST RESISTOR AND SAID IGNITION COIL AND SAID SWITCH MEANS IN SERIES ACROSS A SOURCE OF POTENTIAL, SAID CONTROL MEANS FOR INTERMITTENTLY BYPASSING SAID BALLAST RESISTOR TO CONDUCT INCREASED CURRENT TO SAID IGNITION COIL FOR A PORTION OF THE PERIOD DURING WHICH SAID SWITCH MEANS IS CLOSE, SAID CONTROL MEANS COMPRISING A SEMICONDUCTOR SWITCH CONNECTED IN PARALLEL WITH SAID BALLAST RESISTOR, AND FURTHER COMPRISING BIAS MEANS CONNECTED TO SAID SEMICONDUCTOR SWITCH FOR CLOSING THE SAME FOR A PREDETERMINED TIME DURING THE INITIAL PART OF THE PERIOD DURING WHICH SAID SWITCH MEANS IS CLOSED, SAID SEMICONDUCTOR SWITCH WHEN CLOSED BYPASSING SAID BALLAST RESISTOR TO PROVIDE RAPID BUILD UP OF CURRENT IN SAID IGNITION COIL FOR IMPROVED HIGH VOLTAGE AT HIGH SPEED.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |