Patent US4139804A successfully refreshed from Google Patents.
US4139804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transient modulated ignition system
Assignee: Individual
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Filing: 1977-07-11
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Granted: 1979-02-13
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Expires: 1997-07-11
Abstract
Abstract An ignition system providing a transient waveform intermodulates with an AC waveform in an ignition transformer to provide higher voltage and current outputs for longer periods of time than conventional systems. A simple, reliable and inexpensive timing device is provided for generation of the transient waveform at predetermined intervals.
Inventors
- 👤 Martin E. Gerry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:24
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/005; F02P3/00; F02P3/01; F02P3/02; F02P3/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
An ignition system including an ignition transformer which has a primary winding and a secondary winding, comprising the combination of: means, connected to the primary winding, for precharging the primary winding during a first mode of operation of the system and for initiating a transient signal during a second mode of operation of said system; and an AC source, electrically coupled to the primary winding and the means, for providing a generally rectangular waveform to the primary winding and for intermodulating said rectangular waveform with said transient signal during said second mode of operation.
Claim 2
Dependent Claim
94 words
An ignition system including an ignition transformer which has a primary winding and a secondary winding, comprising the combination of: means, connected to the primary winding, for precharging the primary winding during a first mode of operation of the system and for initiating a transient signal during a second mode of operation of said system; and an AC source, electrically coupled to the primary winding and the means, for providing a generally rectangular waveform to the primary winding and for intermodulating said rectangular waveform with said transient signal during said second mode of operation.
Claim 3
Dependent Claim
16 words
The invention as stated in claim 1, including a capacitor in series circuit with said source.
Claim 4
Dependent Claim
151 words
An ignition system including an ignition transformer which has a primary winding and a secondary winding, comprising the combination of: first means, driven during operative mode of the system, for intermittently shunting the primary winding of the transformer and for initiating a transient signal, said first means comprising: a wheel of electrically conductive material at ground potential, said wheel having insulating members regularly positioned at the wheel periphery within the confines of the wheel; and an electrical contactor, in constant cooperation with said periphery, electrically connected to the primary winding of the transformer; and Ac means, electrically coupled to the primary winding and the first means, for providing AC power to the primary winding and also for intermodulating said AC power with the transient signal during said operative mode, said AC means having a pair of output terminals one terminal of which is electrically at a potential other than ground potential.
Claim 5
Dependent Claim
151 words
An ignition system including an ignition transformer which has a primary winding and a secondary winding, comprising the combination of: first means, driven during operative mode of the system, for intermittently shunting the primary winding of the transformer and for initiating a transient signal, said first means comprising: a wheel of electrically conductive material at ground potential, said wheel having insulating members regularly positioned at the wheel periphery within the confines of the wheel; and an electrical contactor, in constant cooperation with said periphery, electrically connected to the primary winding of the transformer; and Ac means, electrically coupled to the primary winding and the first means, for providing AC power to the primary winding and also for intermodulating said AC power with the transient signal during said operative mode, said AC means having a pair of output terminals one terminal of which is electrically at a potential other than ground potential.
Claim 6
Dependent Claim
26 words
The invention as stated in claim 3, wherein the other of the pair of output terminals is electrically coupled to the primary winding of the transformer.
Claim 7
Dependent Claim
32 words
The invention as stated in claim 3, including second means intermediate the first and AC means, for providing an impedance match between the transformer and the AC means during said operative mode.
Claim 8
Dependent Claim
14 words
The invention as stated in claim 5, wherein the second means is a capacitor.
Claim 9
Dependent Claim
147 words
An ignition system including an ignition transformer which has a primary winding and a secondary winding, comprising the combination of: first means, driven during operative mode of the system, for intermittently shunting the primary winding of the transformer and for initiating a transient signal, said first means comprising: a wheel of electrically conductive material at ground potential, said wheel having insulating members regularly positioned at the wheel periphery within the confines of the wheel; and an electrical contactor, in constant cooperation with said periphery, electrically connected to the primary winding of the transformer; and Ac means, electrically coupled to the primary winding and the first means, for providing AC power to the primary winding and also for intermodulating said AC power with the transient signal during said operative mode, said AC means having a pair of output terminals one terminal of which is electrically at ground potential.
Claim 10
Dependent Claim
147 words
An ignition system including an ignition transformer which has a primary winding and a secondary winding, comprising the combination of: first means, driven during operative mode of the system, for intermittently shunting the primary winding of the transformer and for initiating a transient signal, said first means comprising: a wheel of electrically conductive material at ground potential, said wheel having insulating members regularly positioned at the wheel periphery within the confines of the wheel; and an electrical contactor, in constant cooperation with said periphery, electrically connected to the primary winding of the transformer; and Ac means, electrically coupled to the primary winding and the first means, for providing AC power to the primary winding and also for intermodulating said AC power with the transient signal during said operative mode, said AC means having a pair of output terminals one terminal of which is electrically at ground potential.
Claim 11
Dependent Claim
26 words
The invention as stated in claim 7, wherein the other of the pair of output terminals is electrically coupled to the primary winding of the transformer.
Claim 12
Dependent Claim
32 words
The invention as stated in claim 7, including second means intermediate the first and AC means, for providing an impedance match between the transformer and the AC means during said operative mode.
Claim 13
Dependent Claim
14 words
The invention as stated in claim 9, wherein the second means is a capacitor.
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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |