US3765391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistorized ignition system
Assignee: Individual
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Filing: 1971-02-22
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Granted: 1973-10-16
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Expires: 1991-02-22
Abstract
Abstract An electrical system for use with an ignition system of the type including an ignition coil and breaker points. The electrical system provides for low current through the breaker points to minimize wear and corrosion of the breaker points, provides a high primary winding current at saturation of the primary winding and of the transistors of the electrical system to provide a strong spark, and has a minimum of components. The system includes first and second compound-connected transistors with the base of the second transistor being connected to the emitter of the first transistor and the collectors of said transistors being connected to ground potential. A voltage dividing circuit is adapted to be connected in series with the breaker points of a distributor between the emitter of the second transistor and the breaker points. The base of the first transistor is connected to a predetermined point in the voltage dividing circuit; and the emitter and collector of the second transistor are adapted to be connected in series with the primary winding of an ignition coil and a source of electric potential.
Inventors
- 👤 W Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:03
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/02; F02P3/04; F02P3/0407; F02P3/0435; F02P15/00; F02P15/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
189 words
A transistorized ignition system including, in combination, a transformer coil having a primary winding and a secondary winding, first and second compound-connected transistors each having a base and first and second output terminals, said first output terminal of said first transistor being connected to said base of said second transistor, said second output terminal of said first transistor being connected to said second output terminal of said second transistor, and said output terminals of said second transistor being connected in series with the primary winding of said transformer, a voltage dividing circuit connected between said first output terminal of said second transistor and one terminal of a set of breaker points in a distributor, the base of said first transistor being connected to a point in said voltage dividing circuit, and a capacitor connected across said output terminals of said second transistor in such a manner that, when the breaker points are closed and before the transistors conduct, a closed loop series circuit is formed for discharging any charge on said capacitor, said loop consisting of said capacitor, said voltage dividing circuit and the common conductor for said system.
Claim 2
Dependent Claim
189 words
A transistorized ignition system including, in combination, a transformer coil having a primary winding and a secondary winding, first and second compound-connected transistors each having a base and first and second output terminals, said first output terminal of said first transistor being connected to said base of said second transistor, said second output terminal of said first transistor being connected to said second output terminal of said second transistor, and said output terminals of said second transistor being connected in series with the primary winding of said transformer, a voltage dividing circuit connected between said first output terminal of said second transistor and one terminal of a set of breaker points in a distributor, the base of said first transistor being connected to a point in said voltage dividing circuit, and a capacitor connected across said output terminals of said second transistor in such a manner that, when the breaker points are closed and before the transistors conduct, a closed loop series circuit is formed for discharging any charge on said capacitor, said loop consisting of said capacitor, said voltage dividing circuit and the common conductor for said system.
Claim 3
Dependent Claim
18 words
The system of claim 1 including a zener diode connected across said output terminals of said second transistor.
Claim 4
Dependent Claim
31 words
The system of claim 1 wherein said coil is connected to said first output terminal of said second transistor and is adapted to be connected to a source of electric potential.
Claim 5
Dependent Claim
47 words
The system of claim 1 wherein said voltage dividing circuit includes a first resistor connected between said first output terminal of said second transistor and the base of said first transistor and a second resistor connected between the base of said first transistor and said breaker points.
Claim 6
Dependent Claim
19 words
The system of claim 1 includIng a ballast resistor connected in series with said primary winding of said coil.
Claim 7
Dependent Claim
242 words
An electrical system for use with an ignition system of the type including an ignition coil, said electrical system including first and second compound-connected transistors each having a base and first and second output terminals, means adapted to be connected between the ignition coil and a cyclical switching device and connected to said base of said first transistor for cyclically applying a signal to said base of said first transistor, said base of said second transistor being connected to said first output terminal of said first transistor, said second output terminal of said first transistor being connected to said second output terminal of said second transistor, said first and second output terminals of said second transistor being adapted to be connected in series with the ignition coil and a source of electric potential said signal applying means consisting of a first impedance connected between said first output terminal of said second transistor and the base of said first transistor and a second impedance connected to said base of said first transistor and adapted to be connected to a cyclical switching device, and a capacitor connected across said output terminals of said second transistor in such a manner that, when the switching device is closed and before the transistors conduct, a closed loop series circuit is formed for discharging any charge on said capacitor, said loop consisting of said capacitor, said first impedance, said second impedance and the common conductor for said system.
Claim 8
Dependent Claim
242 words
An electrical system for use with an ignition system of the type including an ignition coil, said electrical system including first and second compound-connected transistors each having a base and first and second output terminals, means adapted to be connected between the ignition coil and a cyclical switching device and connected to said base of said first transistor for cyclically applying a signal to said base of said first transistor, said base of said second transistor being connected to said first output terminal of said first transistor, said second output terminal of said first transistor being connected to said second output terminal of said second transistor, said first and second output terminals of said second transistor being adapted to be connected in series with the ignition coil and a source of electric potential said signal applying means consisting of a first impedance connected between said first output terminal of said second transistor and the base of said first transistor and a second impedance connected to said base of said first transistor and adapted to be connected to a cyclical switching device, and a capacitor connected across said output terminals of said second transistor in such a manner that, when the switching device is closed and before the transistors conduct, a closed loop series circuit is formed for discharging any charge on said capacitor, said loop consisting of said capacitor, said first impedance, said second impedance and the common conductor for said system.
Claim 9
Dependent Claim
19 words
The electrical system of claim 6 including a zener diode connected across said output terminals of said second transistor.
Claim 10
Dependent Claim
187 words
An electrical system for use with an ignition system of the type including an ignition coil, said system including first and second compound-connected transistors, the emitter and collector of said second transistor being adapted to be connected in series with the ignition coil and a source of electric potential, the emitter of said first transistor being connected to the base of said second transistor, the collector of said first transistor being connected to the collector of said second transistor, a resistor connected between the emitter of said second transistor and the base of said first transistor, a resistor connected to said base of said first transistor and adapted to be connected to a cyclical switching device, a capactior connected across said emitter and collector of said second transistor in such a manner that, when the switching device is closed and before the transistors conduct, a closed loop series circuit is formed for discharging any charge on said capacitor, said loop consisting of said capacitor, said resistors and the common conductor for said system, and a zener diode connected across said emitter and collector of said second transistor.
Claim 11
Dependent Claim
187 words
An electrical system for use with an ignition system of the type including an ignition coil, said system including first and second compound-connected transistors, the emitter and collector of said second transistor being adapted to be connected in series with the ignition coil and a source of electric potential, the emitter of said first transistor being connected to the base of said second transistor, the collector of said first transistor being connected to the collector of said second transistor, a resistor connected between the emitter of said second transistor and the base of said first transistor, a resistor connected to said base of said first transistor and adapted to be connected to a cyclical switching device, a capactior connected across said emitter and collector of said second transistor in such a manner that, when the switching device is closed and before the transistors conduct, a closed loop series circuit is formed for discharging any charge on said capacitor, said loop consisting of said capacitor, said resistors and the common conductor for said system, and a zener diode connected across said emitter and collector of said second transistor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |