US3554179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antireverse trigger for an ignition system
Assignee: RE Phelon Co Inc
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Filing: 1969-06-19
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Granted: 1971-01-12
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Expires: 1989-06-19
Abstract
Abstract In an electrically triggered ignition system for two-cycle internal combustion engines, utilizing a trigger coil in which a trigger signal is produced by a flux-varying member carried by a rotating part of the engine, a second flux-varying member is provided on such rotating part which during reverse motion of the engine produces a trigger signal in the trigger coil which is so timed relative to the engine cycle that reverse engine operation cannot be sustained.
Inventors
- 👤 Bob O Burson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:43
CPC Classifications
F; F02; F02P; F02P11/00; F02P11/02; F02P1/00; F02P1/08; F02P1/086
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
222 words
In an ignition system for a two-cycle internal combustion engine having a spark plug and a rotatable part rotated in synchronism with the operation thereof, the combination comprising a trigger coil, means connected with said trigger coil for controlling the firing of said spark plug in response to a trigger signal generated in said trigger coil, a first fluxvArying member carried by said rotatable part for generating a trigger signal in said trigger coil as said rotatable part is rotated, said first flux-varying member being so located on said rotatable part that the trigger signal induced thereby in said trigger coil is so timed during forward operation of said engine as to cause firing of said spark plug at such a point in the operation cycle of said engine as to sustain operation of said engine in said forward direction, and a second flux-varying member also carried by said rotatable part for generating a trigger signal in said trigger coil as said rotatable part is rotated, said second flux-varying member being so located on said rotatable part that the trigger signal induced thereby in said trigger coil is so timed during reverse operation of said engine that it causes firing of said spark plug at such a point in the operation cycle of said engine as not to sustain said reverse operation.
Claim 2
Dependent Claim
222 words
In an ignition system for a two-cycle internal combustion engine having a spark plug and a rotatable part rotated in synchronism with the operation thereof, the combination comprising a trigger coil, means connected with said trigger coil for controlling the firing of said spark plug in response to a trigger signal generated in said trigger coil, a first fluxvArying member carried by said rotatable part for generating a trigger signal in said trigger coil as said rotatable part is rotated, said first flux-varying member being so located on said rotatable part that the trigger signal induced thereby in said trigger coil is so timed during forward operation of said engine as to cause firing of said spark plug at such a point in the operation cycle of said engine as to sustain operation of said engine in said forward direction, and a second flux-varying member also carried by said rotatable part for generating a trigger signal in said trigger coil as said rotatable part is rotated, said second flux-varying member being so located on said rotatable part that the trigger signal induced thereby in said trigger coil is so timed during reverse operation of said engine that it causes firing of said spark plug at such a point in the operation cycle of said engine as not to sustain said reverse operation.
Claim 3
Dependent Claim
53 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 1 further characterized by a main generating means for generating power used for firing said spark plug, said main generating means including a part also carried by said rotatable part which carries said first and second flux-varying members.
Claim 4
Dependent Claim
95 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 2 further characterized by a condenser connected with said main generating means so as to be charged thereby during each revolution of said rotatable part, means connected with said condenser for producing a spark at said spark plug in response to the discharge of said condenser therethourgh, and an electronic switch device connected between said condenser and said spark-producing means and coupled with said condenser through said spark-producing means in response to the trigger signal produced by said trigger coil.
Claim 5
Dependent Claim
79 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 1 further characterized by said second flux-varying member being so located on said rotatable part that the trigger signal induced therein is so timed during reverse operation of said engine as to cause firing of said spark plug at a point in the operating cycle of said engine which is more that 40* in advance of the top dead center position of such cycle.
Claim 6
Dependent Claim
73 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 1 further characterized by said second flux-varying member being so located on said rotatable part that the trigger signal induced thereby in said trigger coil is so timed during reverse operation of said engine that it causes firing of said spark plug within the period during which the exhaust valve of said engine is in an open condition.
Claim 7
Dependent Claim
85 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 1 further characterized by said second flux-varying member being so located on said rotatable part that the trigger signal induced thereby in said trigger coil is so timed during reverse operation of said engine that it causes firing of said spark plug within the period during which the exhaust valve of said engine is in an open condition and the intake valve of said engine is in a closed condition.
Claim 8
Dependent Claim
89 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 1 further characterized by a trigger stator comprising a permanent magnet and two stator legs on one of which stator legs said trigger coil is mounted, said trigger stator legs extending toward said rotatable part and said first and second flux-varying members being angularly spaced on said rotatable part and arranged to pass said trigger stator in sequence so as to each induce a trigger signal therein during each revolution of said rotatable part.
Claim 9
Dependent Claim
46 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 7 further characterized by Said rotatable part being made primarily of a nonmagnetic material and said first and second flux-varying members comprising pieces of magnetic material carried by said rotatable part.
Claim 10
Dependent Claim
67 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 8 further characterized by said two pieces of magnetic material comprising said first and second flux-varying members being connected by a thin connecting section of magnetic material integral therewith which accurately angularly located said two members relative to one another, said connecting section being located beyond the zone of said trigger stator.
Claim 11
Dependent Claim
101 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 1 further characterized by a condenser, means for charging said condenser once during each revolution of said rotatable part, means connected with said condenser for producing a spark at said spark plug in response to the discharge of said condenser therethrough, an electronic switch device between said condenser and said spark-producing means and coupled with said trigger coil for controlling the timing of the discharge of said condenser through said spark-producing means in accordance with the occurence of the trigger signal produced by said trigger coil.
Claim 12
Dependent Claim
66 words
In an ignition system for a two-cycle internal combustion engine, the combination defined in claim 10 further characterized by a trigger stator located adjacent said rotatable part and carrying said trigger coil, and said two flux-varying members being angularly located on said rotatable part so as to successively pass said stator and induce successive trigger signals in said trigger coil as said rotatable part is rotated.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |