US3799137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulser rotor for ignition systems
Assignee: Colt Industries Operating Corp
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Filing: 1972-01-24
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Granted: 1974-03-26
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Expires: 1992-01-24
Abstract
Abstract An ignition system of the fly wheel magneto type including a pulser rotor which develops an output in the associated coil sufficient to provide an energizing spark to the associated spark plug when a rotor is rotating in the desired direction of the rotor and minimal output when the rotor is rotating in the opposite direction to inhibit energization of the spark plug.
Inventors
- 👤 K Reddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:39
CPC Classifications
F; F02; F02P; F02P11/00; F02P11/02; F02P1/00; F02P1/08; F02P1/086
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
An ignition system comprising, in combination, a pulser rotor which is rotatable in a first desired direction and in a second or reverse direction, a trigger coil connected to provide a triggering pulse, a trigger pin associated with the said coil and mounted adjacent the periphery of said rotor to form an air gap therebetween, means for providing a magnetic path through said rotor, the air gap and said trigger pin, the periphery of said rotor being of a form wherein, as the rotor rotates, the width of the air gap gradually changes from maximum to minimum, and a discrete discontinuity is provided on said periphery to provide a given polarity pulse of relatively high amplitude when said rotor is rotating in the desired direction and a pulse of the same given polarity of much smaller amplitude when the rotor tends to rotate in a reverse direction.
Claim 2
Dependent Claim
147 words
An ignition system comprising, in combination, a pulser rotor which is rotatable in a first desired direction and in a second or reverse direction, a trigger coil connected to provide a triggering pulse, a trigger pin associated with the said coil and mounted adjacent the periphery of said rotor to form an air gap therebetween, means for providing a magnetic path through said rotor, the air gap and said trigger pin, the periphery of said rotor being of a form wherein, as the rotor rotates, the width of the air gap gradually changes from maximum to minimum, and a discrete discontinuity is provided on said periphery to provide a given polarity pulse of relatively high amplitude when said rotor is rotating in the desired direction and a pulse of the same given polarity of much smaller amplitude when the rotor tends to rotate in a reverse direction.
Claim 3
Dependent Claim
26 words
An ignition system as in claim 1 wherein the periphery of the rotor is formed substantially as a convolution of a spiral along a 360* arc.
Claim 4
Dependent Claim
125 words
An ignition as in claim 1 wherein the periphery of said rotor forms a convolution of a spiral and has a discrete discontinuity where the maximum diameter of the spiral is joined to the minimum diameter of the spiral, and wherein rotation of the rotor in the desired direction develops a given polarity pulse of relatively large amplitude for use as a triggering pulse, rectifier means for blocking out pulses of other than said given polarity, and rotation of the rotor in the opposite direction develops a pulse of said given polarity which are of relative small amplitude whereby rotation of the rotor in the reverse direction will not develop a triggering pulse and hence, will inhibit operation of the rotor in the reverse direction.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |