Patent US2148636A successfully refreshed from Google Patents.
Patent US3552367A successfully refreshed from Google Patents.
US3552367A
Expired / Lapsed
US
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Structure for and method of electronic signal switching
Assignee: Holley Performance Products Inc
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Filing: 1968-06-17
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Granted: 1971-01-05
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Expires: 1988-06-17
Abstract
Abstract The structure for electronic signal switching disclosed includes trigger signal producing structure, including a transformer having primary and secondary windings and means for controlled shielding of the secondary winding from the primary winding to produce coupling of the transformer windings only when a trigger signal is desired. In one modification of the invention the trigger signal producing structure is included in signal switching structure substituted for the usual breaker points in a vehicle spark ignition circuit and the shielding between the primary and secondary windings of the transformer is accomplished by a slotted rotating rail or cup positioned in the vehicle distributor cap and rotated in accordance with engine speed. In this embodiment of the invention a blocking oscillator provides a continuous electric signal to the primary winding of the transformer which is a bifilar wound coil, the secondary winding of the transformer energizes a semiconductor sensing unit, which in turn energizes a switching semiconductor connected to make or break the vehicle ignition circuit in the manner of the usual breaker points. In a second embodiment of the invention the switching circuit is a darlington amplifier, an integrating circuit receives the output of the blocking oscillator to turn the amplifier on, and a silicon controlled rectifier is connected to short the integrating circuit and turn the amplifier off when the secondary winding of the transformer is not shielded from the primary winding thereof. The amplifier in this embodiment is connected to conduct current through a load, such as an amplifier in an ignition circuit. Both embodiments of the invention may be compensated for voltage variations and temperature by known voltage regulating circuits and commercially known compensating circuits. The second embodiment of the invention may be implemented by commercially procurable voltage and temperature compensated integrated semiconductor circuits. The method of producing electronic signal switching comprises producing trigger pulses by means of controlled shielding of an energized transformer primary winding from the transformer secondary winding and providing switching in accordance with energizing of the transformer secondary winding.
Inventors
- 👤 Ralph L Slitti Jr
- 👤 Donald G Noble
- 👤 William F Shunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:34
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/067
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
275 words
Structure for producing a timed trigger signal comprising a source of continuous alternating electrical signals including a blocking oscillator transistor having emitter, base and collector electrodes, a resistor connected between the emitter electrode and ground, a diode, a resistor and a first part of a transformer primary winding connected between the base of the blocking oscillator transistor and a source of electrical energy, a capacitor and a second part of the primary winding of the transformer connected in parallel with each other and between the collector of the blocking oscillator transistor and the source of electrical energy in a blocking oscillator circuit, switching means operable to change an electric signal through a load comprising a switching transistor connected in series with the load between a source of electrical energy and ground, a control circuit for switching the switching means on being energized comprising a control circuit transistor having emitter, base and collector electrodes with the emitter-collector circuit of the control circuit transistor connected between the source of electrical energy and ground and with the secondary winding of the transformer connected between the base electrode of the control circuit transistor and the source of electrical energy, means for controlleD shielding of the secondary winding of the transformer from the primary winding of the transformer to control energizing of the control circuit including a rotary cylindrical member having longitudinally extending slots therein spaced angularly therearound positioned between the primary winding and secondary winding of the transformer and means for driving the rotary cylindrical member at the speed of an engine having the structure for producing a timed trigger signal as a spark ignition circuit in combination therewith.
Claim 2
Dependent Claim
275 words
Structure for producing a timed trigger signal comprising a source of continuous alternating electrical signals including a blocking oscillator transistor having emitter, base and collector electrodes, a resistor connected between the emitter electrode and ground, a diode, a resistor and a first part of a transformer primary winding connected between the base of the blocking oscillator transistor and a source of electrical energy, a capacitor and a second part of the primary winding of the transformer connected in parallel with each other and between the collector of the blocking oscillator transistor and the source of electrical energy in a blocking oscillator circuit, switching means operable to change an electric signal through a load comprising a switching transistor connected in series with the load between a source of electrical energy and ground, a control circuit for switching the switching means on being energized comprising a control circuit transistor having emitter, base and collector electrodes with the emitter-collector circuit of the control circuit transistor connected between the source of electrical energy and ground and with the secondary winding of the transformer connected between the base electrode of the control circuit transistor and the source of electrical energy, means for controlleD shielding of the secondary winding of the transformer from the primary winding of the transformer to control energizing of the control circuit including a rotary cylindrical member having longitudinally extending slots therein spaced angularly therearound positioned between the primary winding and secondary winding of the transformer and means for driving the rotary cylindrical member at the speed of an engine having the structure for producing a timed trigger signal as a spark ignition circuit in combination therewith.
Claim 3
Dependent Claim
25 words
Structure as set forth in claim 1, wherein the primary winding of the transformer including the first part and second part thereof is bifilar wound.
Claim 4
Dependent Claim
396 words
Structure for producing a timed trigger signal comprising a source of continuous alternating electrical signals including a blocking oscillator transistor having emitter, base and collector electrodes, a resistor connected between the emitter electrode and ground, a first part of a bifilar wound transformer primary winding connected between the collector electrode and a source of electrical energy, and a resistor and capacitor in parallel connected in series with a second part of the bifilar wound transformer primary winding between the base of the blocking oscillator transistor and the source of electrical energy in a blocking oscillator circuit, an integrating circuit including a resistor and capacitor connected in series with each other and connected between the collector electrode of the blocking oscillating transistor and ground, switching means operable to change an electrical signal through a load on switching including a first darlington transistor having emitter, base and collector electrodes, the base electrode of which is connected between the resistor and capacitor of the integrating circuit, the collector electrode of which is connected to a source of electrical energy through the load, a second darlington transistor having emitter, base and collector electrodes, the base electrode of the second darlington transistor being connected to the emitter electrode of the first darlington transistor, the emitter electrode of the second darlington transistor being connected to ground, the collector electrode of the second darlington transistor being connected to the collector electrode of the first darlington transistor and through the load to the source of electrical energy connected in a darlington amplifier circuit and a control circuit for switching the switching means on being energized including a controlled rectifier having primary electrodes and a control electrode with the primary electrodes connected in parallel with the capacitor of the integrating circuit and a capacitor and the secondary winding of the transformer connected in parallel with each other and in series between the control electrode of the silicon controlled rectifier and ground, a rotary cylindrical member including longitudinal slots therein spaced angularly therearound positioned between the primary and secondary windings of the transformer for shielding the secondary winding of the transformer from the primary winding of the transformer to control energizing of the control circuit and means for driving the rotary cylindrical member at the speed of an engine having the structure for producing a timed trigger signal as a spark ignition circuit in combination therewith.
Claim 5
Dependent Claim
396 words
Structure for producing a timed trigger signal comprising a source of continuous alternating electrical signals including a blocking oscillator transistor having emitter, base and collector electrodes, a resistor connected between the emitter electrode and ground, a first part of a bifilar wound transformer primary winding connected between the collector electrode and a source of electrical energy, and a resistor and capacitor in parallel connected in series with a second part of the bifilar wound transformer primary winding between the base of the blocking oscillator transistor and the source of electrical energy in a blocking oscillator circuit, an integrating circuit including a resistor and capacitor connected in series with each other and connected between the collector electrode of the blocking oscillating transistor and ground, switching means operable to change an electrical signal through a load on switching including a first darlington transistor having emitter, base and collector electrodes, the base electrode of which is connected between the resistor and capacitor of the integrating circuit, the collector electrode of which is connected to a source of electrical energy through the load, a second darlington transistor having emitter, base and collector electrodes, the base electrode of the second darlington transistor being connected to the emitter electrode of the first darlington transistor, the emitter electrode of the second darlington transistor being connected to ground, the collector electrode of the second darlington transistor being connected to the collector electrode of the first darlington transistor and through the load to the source of electrical energy connected in a darlington amplifier circuit and a control circuit for switching the switching means on being energized including a controlled rectifier having primary electrodes and a control electrode with the primary electrodes connected in parallel with the capacitor of the integrating circuit and a capacitor and the secondary winding of the transformer connected in parallel with each other and in series between the control electrode of the silicon controlled rectifier and ground, a rotary cylindrical member including longitudinal slots therein spaced angularly therearound positioned between the primary and secondary windings of the transformer for shielding the secondary winding of the transformer from the primary winding of the transformer to control energizing of the control circuit and means for driving the rotary cylindrical member at the speed of an engine having the structure for producing a timed trigger signal as a spark ignition circuit in combination therewith.
Claim 6
Dependent Claim
77 words
Structure as set forth in claim 3 and further including voltage regulating means for the structure for producing a timed trigger signal comprising a voltage regulating transistor having emitter, base and collector electrodes with the emitter and base electrodes being connected in series with the source of electrical energy, a zener diode connected between the base of the voltage regulating transistor and ground and a resistor connected between the emitter and base of the voltage regulating transistor.
Claim 7
Dependent Claim
18 words
Structure as set forth in claim 3 and further including temperature compensating means connected in the control circuit.
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |