US3262438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition system for internal combustion engines
Assignee: US Philips Corp
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Filing: 1963-10-30
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Granted: 1966-07-26
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Expires: 1983-10-30
Abstract
No abstract record available.
Inventors
- 👤 Holford Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:02
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/02; F02P3/04; F02P3/055; F02P3/0552; F02P3/0556
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
AN ENGINE IGNITION CIRCUIT COMPRISING AN IGNITION COIL HAVING A PRIMARY WINDING, A SOURCE OF D.C. SUPPLY VOLTAGE, A TRANSISTOR HAVING AN EMITTER-COLLECTOR PATH AND AN INPUT CIRCUIT FOR CONTROLLING CURRENT FLOW IN SAID PATH, MEANS FOR CONNECTING SAID EMITTER-COLLECTOR PATH EFFECTIVELY IN SERIES WITH SAID PRIMARY WINDING AND SAID SOURCE OF SUPPLY VOLTAGE, AN ENGINE DRIVEN CONTACT-BREAKER, MEANS CONTROLLED BY SAID ENGINE FOR APPLYING A FORWARD BIAS CURRENT TO SAID TRANSISTOR, INPUT CIRCUIT IN THE CLOSED CONDITION OF SAID CONTACT-BREAKER, AND MEANS PROVIDING A LOW RESISTANCE CURRENT PATH ACROSS SAID TRANSISTOR INPUT CIRCUIT WHEN SAID ENGINE IS STATIONARY THEREBY TO INHIBIT THE EFFECT OF SAID FORWARD BIAS ON SAID TRANSISTOR.
Claim 2
Dependent Claim
111 words
AN ENGINE IGNITION CIRCUIT COMPRISING AN IGNITION COIL HAVING A PRIMARY WINDING, A SOURCE OF D.C. SUPPLY VOLTAGE, A TRANSISTOR HAVING AN EMITTER-COLLECTOR PATH AND AN INPUT CIRCUIT FOR CONTROLLING CURRENT FLOW IN SAID PATH, MEANS FOR CONNECTING SAID EMITTER-COLLECTOR PATH EFFECTIVELY IN SERIES WITH SAID PRIMARY WINDING AND SAID SOURCE OF SUPPLY VOLTAGE, AN ENGINE DRIVEN CONTACT-BREAKER, MEANS CONTROLLED BY SAID ENGINE FOR APPLYING A FORWARD BIAS CURRENT TO SAID TRANSISTOR, INPUT CIRCUIT IN THE CLOSED CONDITION OF SAID CONTACT-BREAKER, AND MEANS PROVIDING A LOW RESISTANCE CURRENT PATH ACROSS SAID TRANSISTOR INPUT CIRCUIT WHEN SAID ENGINE IS STATIONARY THEREBY TO INHIBIT THE EFFECT OF SAID FORWARD BIAS ON SAID TRANSISTOR.
References Cited (Backward Citations)
US2943131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |