US3673490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined alternator and ignition trigger signal generator with arrangement for suppressing spurious trigger signals
Assignee: RE Phelon Co Inc
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Filing: 1970-09-29
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Granted: 1972-06-27
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Expires: 1990-09-29
Abstract
Abstract An alternator driven by an internal combustion engine is combined with a trigger signal generator for generator voltage signals used to trigger the breakerless ignition system of the engine. The alternator includes a flywheel having a rim carrying a plurality of main permanent magnets for inducing voltage waveforms in main generating coils located on a stator core positioned adjacent the rotor. The trigger signal generator comprises a triggering magnet and coil assembly located adjacent the path of a flux varying member residing radially inwardly of the path of movement of the main magnets. The production of spurious trigger signals in the trigger coil by the leakage flux of the main magnets is suppressed by both a magnetic shunt, physically positioned between the triggering magnet and coil assembly and the path of the main magnets, providing a lower reluctance path for the leakage flux which path bypasses the triggering magnet and coil assembly and by constructing the flux varying member and the triggering magnet and coil assembly in such a form as to cause the induction in the trigger coil of voltage pulses which occur simultaneously with and counteract such spurious signals.
Inventors
- 👤 Robert T Magrane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:12
CPC Classifications
F; F02; F02P; F02P1/00; H; H02; H02K; H02K21/00; H02K21/12; H02K21/22; H02K21/222; H02K21/48
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
182 words
In a combined alternator and ignition trigger signal generator for use with an internal combustion engine, the combination comprising: a rotor including at least one permanent main magnet for movement therewith in a circular path, a main stator located adjacent said circular path and comprised of a core of magnetic material and at least one main coil on said core arranged to have a voltage waveform induced therein by said at least one main magnet as said rotor rotates, a flux varying member located radially inwardly of said circular path and connected with said rotor for rotation therewith, a triggering magnet and coil assembly cooperable with said flux varying member and between said circular path and said flux varying member, and a magnetic shunt separate from said main stator core and consisting of a piece of magnetic material located generally between said triggering magnet and coil assembly and said circular path so as to provide a low reluctance path for leakage flux from said at least one main magnet which would otherwise tend to pass through said triggering magnet and coil assembly.
Claim 2
Dependent Claim
182 words
In a combined alternator and ignition trigger signal generator for use with an internal combustion engine, the combination comprising: a rotor including at least one permanent main magnet for movement therewith in a circular path, a main stator located adjacent said circular path and comprised of a core of magnetic material and at least one main coil on said core arranged to have a voltage waveform induced therein by said at least one main magnet as said rotor rotates, a flux varying member located radially inwardly of said circular path and connected with said rotor for rotation therewith, a triggering magnet and coil assembly cooperable with said flux varying member and between said circular path and said flux varying member, and a magnetic shunt separate from said main stator core and consisting of a piece of magnetic material located generally between said triggering magnet and coil assembly and said circular path so as to provide a low reluctance path for leakage flux from said at least one main magnet which would otherwise tend to pass through said triggering magnet and coil assembly.
Claim 3
Dependent Claim
69 words
The combination defined in claim 1 further characterized by said triggering magnet and coil assembly comprising a sub-assembly consisting of a triggering magnet and an associated core of magnetic material, said triggering magnet and said latter core in combination providing two pole faces of opposite magnetic polarity spaced angularly along the path of movement of said flux varying member, and at least one trigger coil mounted on said sub-assembly.
Claim 4
Dependent Claim
62 words
The combination defined in claim 1 further characterized by said triggering magnet and coil assembly comprising a triggering magnet, two pieces of magnetic material engaging opposite pole faces of said triggering magnet and extending radially inwardly therefrom toward said path of movement of said flux varying member, and at least one trigger coil mounted on one of said pieces of magnetic material.
Claim 5
Dependent Claim
82 words
The combination defined in claim 1 further characterized by a board on which said triggering magnet and coil assembly and said magnetic shunt are mounted, said board including a portion thereof extending arcuately in one direction beyond said shunt, and a plurality of electronic components mounted on said arcuately extending portion of said board which components are interconnected with themselves and with said triggering magnet and coil assembly to form a major part of the ignition system for said internal combustion engine.
Claim 6
Dependent Claim
42 words
The combination as defined in claim 4 further characterized by a quantity of potting material surrounding said board, said electronic components, said triggering magnet and coil assembly and said magnetic shunt to form all of said latter parts into a unitary module.
Claim 7
Dependent Claim
122 words
The combination defined in claim 1 further characterized by there being a plurality of main magnets included in said rotor and spaced angularly from one another along said circular path, said triggering magnet and coil assembly including a triggering magnet and a trigger coil, said flux varying member including means for varying the flux of said triggering magnet through said trigger coil in such a manner as to induce in said trigger coil and at one rotor position a triggering pulse of one polarity and to induce in said trigger coil at other rotor positions pulses of opposite polarity timed to occur substantially simultaneously with ripple pulses induced in said trigger coil by the leakage flux of said plurality of main magnets.
Claim 8
Dependent Claim
67 words
The combination defined in claim 6 further characterized by said flux varying member comprising a generally annular piece of magnetic material having a circumferentially extending pole face, said pole face including a plurality of circumferentially extending surfaces each of which is of a substantially constant radius along its circumferential length and the radii of which surfaces progressively increase in going from one circumferential surface to the next.
Claim 9
Dependent Claim
41 words
The combination defined in claim 7 further characterized by said flux varying member including a circumferentially extending gap between the one of said circumferentially extending surfaces having a maximum radius and the one of said circumferentially extending surfaces having minimum radius.
Claim 10
Dependent Claim
69 words
The combination defined in claim 8 further characterized by said triggering magnet and coil assembly comprising a sub-assembly consisting of a triggering magnet and an associated core of magnetic material, said triggering magnet and said latter core in combination providing two pole faces of opposite magnetic polarity spaced angularly along the path of movement of said flux varying member, and at least one trigger coil mounted on said sub-assembly.
Claim 11
Dependent Claim
201 words
In a combined alternator and ignition trigger signal generator for use with an internal combustion engine, the combination comprising: a rotor including a plurality of permanent main magnets angularly spaced about the axis thereof for rotation therewith along a circular path, a main stator located adjacent said circUlar path and comprising a core of magnetic material and at least one main generating coil on said core arranged to have a voltage waveform induced therein by said main magnets as said rotor rotates, a flux varying member connected with said rotor for rotation therewith, and a triggering magnet and coil assembly located adjacent said flux varying member for cooperation therewith, said triggering magnet and coil assembly including triggering magnet and a trigger coil, and said flux varying member including means for varying the flux of said triggering magnet through said trigger coil in such a manner as to induce in said trigger coil and at one rotor position a triggering pulse of one polarity and to induce in said trigger coil at other rotor positions pulses of opposite polarity timed to occur substantially simultaneously with ripple pulses induced in said trigger coil by the leakage flux of said plurality of main magnets.
Claim 12
Dependent Claim
201 words
In a combined alternator and ignition trigger signal generator for use with an internal combustion engine, the combination comprising: a rotor including a plurality of permanent main magnets angularly spaced about the axis thereof for rotation therewith along a circular path, a main stator located adjacent said circUlar path and comprising a core of magnetic material and at least one main generating coil on said core arranged to have a voltage waveform induced therein by said main magnets as said rotor rotates, a flux varying member connected with said rotor for rotation therewith, and a triggering magnet and coil assembly located adjacent said flux varying member for cooperation therewith, said triggering magnet and coil assembly including triggering magnet and a trigger coil, and said flux varying member including means for varying the flux of said triggering magnet through said trigger coil in such a manner as to induce in said trigger coil and at one rotor position a triggering pulse of one polarity and to induce in said trigger coil at other rotor positions pulses of opposite polarity timed to occur substantially simultaneously with ripple pulses induced in said trigger coil by the leakage flux of said plurality of main magnets.
Claim 13
Dependent Claim
125 words
The combination defined in claim 10 further characterized by said triggering magnet and coil assembly comprising a sub-assembly consisting of said triggering magnet and an associated core of magnetic material, said triggering magnet and said latter core in combination providing two pole faces of opposite magnetic polarity spaced angularly along the path of movement of said flux varying member, said trigger coil being mounted on said sub-assembly, and said flux varying member comprising a generally annular piece of magnetic material having a circumferentially extending pole face, said pole face including a plurality of circumferentially extending surfaces each of which is of substantially constant radius along its circumferential length and the radii of which surfaces progressively increase in going from one circumferential surface to the next.
Claim 14
Dependent Claim
42 words
The combination defined in claim 11 further characterized by said flux varying member including a circumferentially extending gap between the one of said circumferentially extending surfaces having a maximum radius and the one of said circumferentially extending surfaces having a minimum radius.
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |