Patent US3715650A successfully refreshed from Google Patents.
US3715650A
Expired / Lapsed
US
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Pulse generator for ignition systems
Assignee: Brunswick Corp
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Filing: 1971-11-23
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Granted: 1973-02-06
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Expires: 1991-11-23
Abstract
Abstract A capacitor discharge ignition includes a pulse generator coupled to an engine establish pulse signals to trigger a thyristor at all speeds including engine cranking speed. The generator includes a permanent magnet rotor formed in a continuous doughnut shape having planar faces, with 180* axially polarized with one polarity and the opposite 180* directly oppositely polarized. Circumferential pole shoes of slightly less than 180* in length are centrally secured to the top and bottom of each magnet and project radially therefrom. A common pick-up winding is wound on a generally U-shaped core which opens toward the rotor with the ends of the arms aligned with and adjacent the outer edges of upper an lower shoes. The rotation of the rotor results in the reversal of flux within the pick-up core at each of the abutting sections with the corresponding single polarity pulse being generated as the rotor moves by the U-shaped core.
Inventors
- 👤 J Draxler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:35
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/02; F02P7/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A pulse signal generating means for generating time spaced pulses of sequentially alternate polarity, comprising a plurality of magnets mounted in circumferential spacing about an axis of rotation with the magnets maintaining an essentially continuous field about the total periphery of the magnets, a rotatable support having an axis of rotation normal to the principal plane of the plurality of magnets, said magnets being polarized axially of said support with adjacent magnets being oppositely polarized to create a corresponding magnetic reversing field, and a pick-up coil means mounted adjacent the periphery of the plurality of magnets and in the magnetic field established by the magnets to establish a single polarity pulse signal in response to each movement of a reversing field past the coil means.
Claim 2
Dependent Claim
125 words
A pulse signal generating means for generating time spaced pulses of sequentially alternate polarity, comprising a plurality of magnets mounted in circumferential spacing about an axis of rotation with the magnets maintaining an essentially continuous field about the total periphery of the magnets, a rotatable support having an axis of rotation normal to the principal plane of the plurality of magnets, said magnets being polarized axially of said support with adjacent magnets being oppositely polarized to create a corresponding magnetic reversing field, and a pick-up coil means mounted adjacent the periphery of the plurality of magnets and in the magnetic field established by the magnets to establish a single polarity pulse signal in response to each movement of a reversing field past the coil means.
Claim 3
Dependent Claim
125 words
A pulse signal generating means for generating time spaced pulses of sequentially alternate polarity, comprising a plurality of magnets mounted in circumferential spacing about an axis of rotation with the magnets maintaining an essentially continuous field about the total periphery of the magnets, a rotatable support having an axis of rotation normal to the principal plane of the plurality of magnets, said magnets being polarized axially of said support with adjacent magnets being oppositely polarized to create a corresponding magnetic reversing field, and a pick-up coil means mounted adjacent the periphery of the plurality of magnets and in the magnetic field established by the magnets to establish a single polarity pulse signal in response to each movement of a reversing field past the coil means.
Claim 4
Dependent Claim
125 words
A pulse signal generating means for generating time spaced pulses of sequentially alternate polarity, comprising a plurality of magnets mounted in circumferential spacing about an axis of rotation with the magnets maintaining an essentially continuous field about the total periphery of the magnets, a rotatable support having an axis of rotation normal to the principal plane of the plurality of magnets, said magnets being polarized axially of said support with adjacent magnets being oppositely polarized to create a corresponding magnetic reversing field, and a pick-up coil means mounted adjacent the periphery of the plurality of magnets and in the magnetic field established by the magnets to establish a single polarity pulse signal in response to each movement of a reversing field past the coil means.
Claim 5
Dependent Claim
46 words
The pulse signal generator of claim 1 having pole shoes secured to the opposite poles of said magnets with the ends of said pole shoes spaced at each abutting magnet joint and with the shoes projecting radially from the face of the edge of the magnets.
Claim 6
Dependent Claim
25 words
The pulse signal generator of claim 2 wherein said coil means includes a core having core arms mounted with the ends adjacent to said shoes.
Claim 7
Dependent Claim
27 words
The pulse signal generating means of claim 1 wherein said plurality of magnets includes a continuous magnetic member having the circumferential portions magnetized to define said magnets.
Claim 8
Dependent Claim
82 words
The pulse signal generator of claim 1 wherein said magneTs are mounted with the magnetic ends in abutting relation,and pole shoes are secured to the opposite poles of said magnets with the ends of said pole shoes spaced at each abutting magnet joint and the shoes project radially past a peripheral edge of the magnets, said coil means having a core with a pair of pole arms mounted with the ends of the arms aligned with the projecting edge of said shoes.
Claim 9
Dependent Claim
63 words
The pulse signal generating means of claim 1 including a main pulse forming capacitor, a main gated switch means connected to said capacitor and having an input means to control discharge of said capacitor, a pilot gated switch means connected to said input means to control said main gated switch means and having a pilot input means connected to said pick-up coil means.
Claim 10
Dependent Claim
49 words
The pulse signal generator of claim 6 having a trigger capacitor connected to said pilot gated switch means and to the input means of said main gated switch means to provide a pulse signal to said main gated switch means in response to actuation of said pilot switch means.
Claim 11
Dependent Claim
65 words
The pulse signal generator of claim 7 wherein pole shoes are secured to said magnets and project radially of the edge of the magnet and said coil means includes a core having core arms mounted with the ends adajcent to said shoes to define a low reluctance magnetic path having air gaps of the order of 0.060 inches between the shoes and the core arms.
Claim 12
Dependent Claim
48 words
The pulse signal generating means of claim 1 wherein said pick-up coil means includes a low reluctance U-shaped magnetic core having the open portion mounted adjacent the periphery of the plurality of magnets and spaced from the periphery to define air gaps of the order of 0.060 inches.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |