Patent US3069257A successfully refreshed from Google Patents.
US3704397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition adapter circuit
Assignee: Syncro Corp
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Filing: 1971-12-13
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Granted: 1972-11-28
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Expires: 1991-12-13
Abstract
Abstract An electrical ignition system for adapting a conventional magneto spark ignition system to a capacitor discharge ignition system.
Inventors
- 👤 Thomas J Crouch
- 👤 George E Gynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:04
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/02; F02P7/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
289 words
An adapter assembly for converting an existing magneto ignition system to a capacitor discharge ignition system with the magneto having a rotor and a stator and having a first magneto coil for providing an alternating output potential and connected to and across a first set of breaker points and having a second magneto coil for providing an alternating output potential and connected to and across a second set of breaker points with the first and second magneto coils and first and second sets of points being supported on the stator, a first conductor normally connecting the first magneto coil and first set of points to a first ignition coil, a second conductor normally connecting the second magneto coil and second set of points to a second ignition coil, said adapter assembly comprising: a first capacitor, first charge circuit means connecting the first conductor and hence the first magneto coil to said first capacitor for charging said first capacitor with the electrical energy of the output potential from the first magneto coil, first discharge circuit means connecting said first capacitor to the second ignition coil for transmitting the stored electrical energy in said first capacitor in response to the occurrence of a first preselected positional relationship between the rotor and the stator, a second capacitor, second charge circuit means connecting the second conductor and hence the second magneto coil to said second capacitor for charging said second capacitor with electrical energy of the output potential from the second magneto coil, second discharge circuit means connecting said second capacitor to the first ignition coil for transmitting the stored electrical energy in said second capacitor in response to the occurrence of a second preselected positional relationship between the rotor and the stator.
Claim 2
Dependent Claim
289 words
An adapter assembly for converting an existing magneto ignition system to a capacitor discharge ignition system with the magneto having a rotor and a stator and having a first magneto coil for providing an alternating output potential and connected to and across a first set of breaker points and having a second magneto coil for providing an alternating output potential and connected to and across a second set of breaker points with the first and second magneto coils and first and second sets of points being supported on the stator, a first conductor normally connecting the first magneto coil and first set of points to a first ignition coil, a second conductor normally connecting the second magneto coil and second set of points to a second ignition coil, said adapter assembly comprising: a first capacitor, first charge circuit means connecting the first conductor and hence the first magneto coil to said first capacitor for charging said first capacitor with the electrical energy of the output potential from the first magneto coil, first discharge circuit means connecting said first capacitor to the second ignition coil for transmitting the stored electrical energy in said first capacitor in response to the occurrence of a first preselected positional relationship between the rotor and the stator, a second capacitor, second charge circuit means connecting the second conductor and hence the second magneto coil to said second capacitor for charging said second capacitor with electrical energy of the output potential from the second magneto coil, second discharge circuit means connecting said second capacitor to the first ignition coil for transmitting the stored electrical energy in said second capacitor in response to the occurrence of a second preselected positional relationship between the rotor and the stator.
Claim 3
Dependent Claim
106 words
The adapter assembly of claim 1 in which said first discharge circuit means includes first solid state switch means for transmitting the stored electrical energy from said first capacitor in response to a first trigger pulse and includes first trigger meAns operable in response to actuation of the second breaker points for providing said first trigger pulse, said second discharge circuit means includes second solid state switch means for transmitting the stored electrical energy from said second capacitor in response to a second trigger pulse and includes second trigger means operable in response to actuation of the first breaker points for providing said second trigger pulse.
Claim 4
Dependent Claim
105 words
The adapter assembly of claim 2 with said first charge circuit means including the first breaker points with said first capacitor being charged from the first magneto coil when the first breaker points are in open circuit condition, said second charge circuit means including the second breaker points with said second capacitor being charged from the second magneto coil with the second breaker points are in open circuit condition, said first trigger means providing said first trigger pulse with the second breaker points in open circuit condition, said second trigger means providing said second trigger pulse with the first breaker points in open circuit condition.
Claim 5
Dependent Claim
184 words
An adapter assembly for converting an existing magneto spark ignition system to a capacitor discharge ignition system with the magneto having a rotor and a stator and having at least one magneto coil connected to the stator for providing an alternating output potential and at least one set of breaker points in combination with a spark ignition coil, said adapter assembly comprising: a capacitor, first circuit means connecting the magneto coil to said capacitor for charging said capacitor directly with the electrical energy of the output potential from the magneto coil for only one polarity of the output potential, second circuit means connecting said capacitor to the ignition coil, said second circuit means comprising: solid state switch means having a pair of principal electrodes and a gate electrode for transmitting the stored energy on said capacitor to the ignition coil via said principal electrodes upon the occurrence of a trigger pulse at said gate electrode, and trigger means operatively connected with the rotor for providing said trigger pulse in response to the occurrence of a preselected positional relationship between the rotor and the stator.
Claim 6
Dependent Claim
184 words
An adapter assembly for converting an existing magneto spark ignition system to a capacitor discharge ignition system with the magneto having a rotor and a stator and having at least one magneto coil connected to the stator for providing an alternating output potential and at least one set of breaker points in combination with a spark ignition coil, said adapter assembly comprising: a capacitor, first circuit means connecting the magneto coil to said capacitor for charging said capacitor directly with the electrical energy of the output potential from the magneto coil for only one polarity of the output potential, second circuit means connecting said capacitor to the ignition coil, said second circuit means comprising: solid state switch means having a pair of principal electrodes and a gate electrode for transmitting the stored energy on said capacitor to the ignition coil via said principal electrodes upon the occurrence of a trigger pulse at said gate electrode, and trigger means operatively connected with the rotor for providing said trigger pulse in response to the occurrence of a preselected positional relationship between the rotor and the stator.
Claim 7
Dependent Claim
49 words
The adapter assembly of claim 4 for use with the existing magneto spark ignition system further including a second set of breaker points, said trigger means including the second set of breaker points and providing said trigger pulse in response to actuation of the second set of breaker points.
Claim 8
Dependent Claim
56 words
The adapter assembly of claim 5 with said first circuit means including the first set of breaker points for charging said capacitor with the first set of breaker points in an open circuit condition, said trigger means providing said trigger pulse in response to the second set of breaker points being in an open circuit condition.
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |