Patent US3851302A successfully refreshed from Google Patents.
Patent US3621826A successfully refreshed from Google Patents.
US3621826A
Expired / Lapsed
US
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Pulse counter ignition system
Assignee: Individual
•
Filing: 1970-01-15
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Granted: 1971-11-23
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Expires: 1990-01-15
Abstract
Abstract AN IGNITION SYSTEM HAVING A DECADE COUNTER RESPONSIVE TO SEQUENTIAL TIMING PULSES PRODUCED BY AN OPTICAL PULSE GENERATING UNIT DRIVEN BY THE TIMING SHAFT OF THE ENGINE. THE COUNTER IS RESET FOLLOWING EACH FIRING CYCLE IN RESPONSE TO A RESET PULSE PRODUCED BY THE PULSE UNIT, SUCH CYCLE COMPRISING A COUNT EQUAL TO THE NUMBER OF CYLINDERS OF THE ENGINE. EACH COUNTER OUTPUT TRIGGERS A SEPARATE SCR GHAT, IN TURN, ACTIVATES AN IGNITION TRANSFORMER CONNECTED TO A RESPECTIVE SPARK PLUG.
Inventors
- 👤 Gene L Chrestensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/02; F02P7/03
Claims Analysis
Total Claims: 0
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |