US3241538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic ignition system
Assignee: US Philips Corp
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Filing: 1963-07-15
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Granted: 1966-03-22
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Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 Eduard H Hugenholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:17
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/067; F02P7/07; F02P5/00; F02P5/04; F02P5/145; F02P5/155; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING A SOURCE OF ELECTRIC ENERGY, A SEMICONDUCTOR DEVICE HAVING A MAIN CURRENT PATH AND A CONTROL ELECTRODE FOR CONTROLLING THE CURRENT FLOW THEREIN, A TRANSFORMER HAVING A PRIMARY WINDING AND A SECONDARY WINDING FOR PRODUCING AN IGNITION PULSE, MEANS CONNECTING SAID PRIMARY WINDING TO SAID MAIN CURRENT PATH OF SAID SEMICONDUCTOR DEVICE AND TO SAID ELECTRIC ENERGY SOURCE, A SOURCE OF CONTROL VOLTAGE OPERATIVELY ASSOCIATED WITH SAID ENGINE SO AS TO PRODUCE A VOLTAGE WHICH VARIES IN TIMED RELATION WITH SAID ENGINE, SAID VOLTAGE SOURCE COMPRISING VARIABLE IMPEDANCE MEANS IN WHICH THE IMPEDANCE VARIES IN SYNCHRONISM WITH THE ENGINE TO PRODUCE A PREDETERMINED VARIATION IN VOLTAGE AMPLITUDE OVER AN ENGINE CYCLE WHICH IS SUBSTANTIALLY INDEPENDENT OF ENGINE SPEED, AND MEANS CONNECTING SAID VOLTAGE SOURCE TO SAID CONTROL ELECTRODE SO AS TO SWITCH SAID SEMICONDUCTOR MAIN PATH TO A LOW IMPEDANCE CONDITION WHEREBY SUBSTANTIALLY THE FULL VOLTAGE OF SAID ELECTRIC ENERGY SOURCE IS APPLIED TO THE PRIMARY WINDING TO PRODUCE SAID IGNITION PULSE IN SAID SECONDARY WINDING.
Claim 2
Dependent Claim
175 words
AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING A SOURCE OF ELECTRIC ENERGY, A SEMICONDUCTOR DEVICE HAVING A MAIN CURRENT PATH AND A CONTROL ELECTRODE FOR CONTROLLING THE CURRENT FLOW THEREIN, A TRANSFORMER HAVING A PRIMARY WINDING AND A SECONDARY WINDING FOR PRODUCING AN IGNITION PULSE, MEANS CONNECTING SAID PRIMARY WINDING TO SAID MAIN CURRENT PATH OF SAID SEMICONDUCTOR DEVICE AND TO SAID ELECTRIC ENERGY SOURCE, A SOURCE OF CONTROL VOLTAGE OPERATIVELY ASSOCIATED WITH SAID ENGINE SO AS TO PRODUCE A VOLTAGE WHICH VARIES IN TIMED RELATION WITH SAID ENGINE, SAID VOLTAGE SOURCE COMPRISING VARIABLE IMPEDANCE MEANS IN WHICH THE IMPEDANCE VARIES IN SYNCHRONISM WITH THE ENGINE TO PRODUCE A PREDETERMINED VARIATION IN VOLTAGE AMPLITUDE OVER AN ENGINE CYCLE WHICH IS SUBSTANTIALLY INDEPENDENT OF ENGINE SPEED, AND MEANS CONNECTING SAID VOLTAGE SOURCE TO SAID CONTROL ELECTRODE SO AS TO SWITCH SAID SEMICONDUCTOR MAIN PATH TO A LOW IMPEDANCE CONDITION WHEREBY SUBSTANTIALLY THE FULL VOLTAGE OF SAID ELECTRIC ENERGY SOURCE IS APPLIED TO THE PRIMARY WINDING TO PRODUCE SAID IGNITION PULSE IN SAID SECONDARY WINDING.
References Cited (Backward Citations)
US3139876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |