US3175122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition systems for internal combustion engines
Assignee: Wipac Development Ltd
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Filing: 1959-12-28
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Granted: 1965-03-23
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Expires: 1979-12-28
Abstract
No abstract record available.
Inventors
- 👤 Penn Reginald
- 👤 Gayler George Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:15
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/08; F02P1/086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING A SOURCE OF ALTERNATING CURRENT, A CAPACITOR HAVING A CAPACITANCE WITHIN THE RANGE OF 0.1 TO 0.5 UF., A RECTIFIER, MEANS CONNECTING SAID SOURCE THROUGH SAID RECTIFIER TO SAID CAPACITOR TO CHARGE SAME, A RADIO-FREQUENCY VOLTAGE STEP-UP TRANSFORMER HAVING A CORE OF LOW LOSS FERRO-MAGNETIC MAMTERIAL, A SECONDARY-TO-PRIMARY TURNS RATIO OF AT LEAST 50:1, A PRIMARY WINDING OF BETWEEN 10 AND 40 TURNS AND AN INDUCTANCE MEASURED ACROSS THE PRIMARY WINDING OF 4 TO 30 UH., MAKE-AND-BREAK CONTACTS, MEANS CONNECTING THE PRIMARY WINDING OF SAID TRANSFORMER AND THE MAKE-AND-BREAK CONTACTS IN SEREIS ACROSS SAID CAPACITOR, A SPARK PLUG AND MEANS CONNECTING THE SPARK PLUG ACROSS THE SECONDARY WINDING OF SAID TRANSFORMER, THE OUTPUT FROM SAID SOURCE PROVIDING AN INVERSE VOLTAGE ACROSS SAID REC TIFIER OF ESSENTIALLY 800 VOLTS MAXIMUM.
Claim 2
Dependent Claim
138 words
AN IGNITION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, COMPRISING A SOURCE OF ALTERNATING CURRENT, A CAPACITOR HAVING A CAPACITANCE WITHIN THE RANGE OF 0.1 TO 0.5 UF., A RECTIFIER, MEANS CONNECTING SAID SOURCE THROUGH SAID RECTIFIER TO SAID CAPACITOR TO CHARGE SAME, A RADIO-FREQUENCY VOLTAGE STEP-UP TRANSFORMER HAVING A CORE OF LOW LOSS FERRO-MAGNETIC MAMTERIAL, A SECONDARY-TO-PRIMARY TURNS RATIO OF AT LEAST 50:1, A PRIMARY WINDING OF BETWEEN 10 AND 40 TURNS AND AN INDUCTANCE MEASURED ACROSS THE PRIMARY WINDING OF 4 TO 30 UH., MAKE-AND-BREAK CONTACTS, MEANS CONNECTING THE PRIMARY WINDING OF SAID TRANSFORMER AND THE MAKE-AND-BREAK CONTACTS IN SEREIS ACROSS SAID CAPACITOR, A SPARK PLUG AND MEANS CONNECTING THE SPARK PLUG ACROSS THE SECONDARY WINDING OF SAID TRANSFORMER, THE OUTPUT FROM SAID SOURCE PROVIDING AN INVERSE VOLTAGE ACROSS SAID REC TIFIER OF ESSENTIALLY 800 VOLTS MAXIMUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |