US3629652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition systems
Assignee: Lucas Support Services Ltd
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Filing: 1969-05-27
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Granted: 1971-12-21
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Expires: 1989-05-27
Abstract
Abstract The invention relates to an ignition system for supplying energy to a spark device. The system includes a first capacitor which can be charged from a source of DC supply, a device which breaks down when the voltage across the capacitor attains a predetermined value thereby to allow the capacitor to discharge through the spark device and a further capacitor which is connected in parallel with the capacitor and which can be charged from a separate source of supply when a higher energy is required, there being provided a unidirectional current flow device in series with the two capacitors.
Inventors
- 👤 William Henry Maycock
- 👤 Henry James Chafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
F; F02; F02P; F02P9/00; F02P9/002; F02P15/00; F02P15/001; F02P15/003; F02P9/007; H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/543
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
An ignition system of the kind comprising a first capacitor, means for charging the capacitor, a spark gap connected in series with a pair of output terminals and said capacitor, said spark gap being arranged to break down and conduct when the voltage across the capacitor attains a predetermined value thereby to allow the capacitor to discharge through a spark device connected across said terminals, the system also including a second capacitor connected in parallel with said first capacitor, a diode rectifier means connected in series with said capacitors for preventing current flow from said first capacitor into said second capacitor, and means for charging the second capacitor when an increase in the energy supplied by the system is required.
Claim 2
Dependent Claim
120 words
An ignition system of the kind comprising a first capacitor, means for charging the capacitor, a spark gap connected in series with a pair of output terminals and said capacitor, said spark gap being arranged to break down and conduct when the voltage across the capacitor attains a predetermined value thereby to allow the capacitor to discharge through a spark device connected across said terminals, the system also including a second capacitor connected in parallel with said first capacitor, a diode rectifier means connected in series with said capacitors for preventing current flow from said first capacitor into said second capacitor, and means for charging the second capacitor when an increase in the energy supplied by the system is required.
Claim 3
Dependent Claim
62 words
An ignition system as claimed in claim 1 in which the means for charging the capacitors comprises a pair of transformers respectively, each transformer having associated therewith a rectifier and the transformer which charges the second capacitor has switch means associated therewith whereby it can be brought into operation only when an increase in the energy supplied by the system is required.
Claim 4
Dependent Claim
76 words
An ignition system as claimed in claim 1 in which the means for charging the capacitors comprises a pair of transformer means coupled respectively thereto, each transformer means having associated therewith a rectifier, and a selector switch means for energizing one or the other transformer means, said one transformer means serving to charge said first capacitor and said other transformer means serving to charge the second capacitor and the first capacitor through said diode rectifier means.
References Cited (Backward Citations)
GB929070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |