US3572302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine speed limiting apparatus
Assignee: ARE Inc
•
Filing: 1969-04-16
•
Granted: 1971-03-23
•
Expires: 1989-04-16
Abstract
Abstract A THYRISTOR IN PARALLEL WITH THE IGNITION TIMING SWITCH OF AN INTERNAL COMBUSTION ENGINE IS TURNED ON TO PREVENT IGNITION SPARKS AT THE DESIRED LIMITING SPEED. TIMING IS PROVIDED BY FIXED DURATION PULSES HAVING A TIME DURATION EQUAL TO THE TIME BETWEEN IGNITION SPARKS AT THE LIMITING SPEED. THE EFFECTS OF IGNITION TIMING SWITCH CONTACTS BOUNCING ARE PREVENTED BY THE THYRISTOR SHORTING OUT THE BOUNCING CONTACTS AND DWELL TIME IS INCREASED TO NEAR THE THEORETICAL MAXIMUM BY ALLOWING CURRENT FLOW TO THE IGNITION COIL BY WAY OF THE THYRISTOR WHEN THE IGNITION TIMING SWITCH CONTACTS ARE OPEN AND AFTER THE IGNITION SPARK OCCURS.
Inventors
- 👤 Donald L Wollesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:19
CPC Classifications
F; F02; F02P; F02P9/00; F02P9/002; F02P9/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |