US3732483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnet-type ac generator for a breakerless-type ignition system
Assignee: Mahle Electric Drive Systems Co Ltd
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Filing: 1971-09-20
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Granted: 1973-05-08
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Expires: 1991-09-20
Abstract
Abstract A magnet-type AC generator for a breakerless-type ignition system comprising a capacitor, an ignition coil including primary and secondary coils, a thyristor for discharging said capacitor through the primary coil of said ignition coil and a spark plug connected to the secondary coil of said ignition coil in which said generator comprises a stator including a capacitor charging winding or windings and a thyristor firing winding or windings, and a rotor including a multi-pole magnetic field means which has a plurality of poles for cooperating with said capacitor charging and thyristor firing windings.
Inventors
- 👤 M Katsumata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:26
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/08; F02P1/086; F02P1/02; H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/27; H02K1/2786; H02K1/2787; H02K1/2789; H02K1/2791; H02K21/00; H02K21/12; H02K21/22; H02K21/222; H02K21/225; H02K21/48; F02P11/00; F02P11/02; F02P11/025
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
163 words
In a magnet-type AC generator for an ignition system which comprises a capacitor, an ignition coil including primary and secondary coils, gate-controlled solid state threshold switch means operative for discharging said capacitor through said ignition primary coil and a spark plug connected to said ignition secondary coil, said generator comprising a stator having a winding for charging said capacitor and a firing winding for feeding signals to the gate of said switch means for operation of said switch means, and a rotor having magnetic field means including circumferentially arranged poles cooperating with both said capacitor charging and firing windings, poles of opposite polarities being alternately arranged, said generator characterized further in that said firing winding comprises two adjacent coils having the same number of turns and differentially connected to each other and said magnetic field means includes a magnetic portion whereby, during each rotation of said rotor, said adjacent coils are disposed at one time in magnetic paths having respectively different gap lengths.
Claim 2
Dependent Claim
163 words
In a magnet-type AC generator for an ignition system which comprises a capacitor, an ignition coil including primary and secondary coils, gate-controlled solid state threshold switch means operative for discharging said capacitor through said ignition primary coil and a spark plug connected to said ignition secondary coil, said generator comprising a stator having a winding for charging said capacitor and a firing winding for feeding signals to the gate of said switch means for operation of said switch means, and a rotor having magnetic field means including circumferentially arranged poles cooperating with both said capacitor charging and firing windings, poles of opposite polarities being alternately arranged, said generator characterized further in that said firing winding comprises two adjacent coils having the same number of turns and differentially connected to each other and said magnetic field means includes a magnetic portion whereby, during each rotation of said rotor, said adjacent coils are disposed at one time in magnetic paths having respectively different gap lengths.
Claim 3
Dependent Claim
63 words
The magnet-type AC generator as set forth in claim 1, in which said magnetic field means comprises a permanent magnet having a plurality of pole pieces respectively mounted on said poles of the magnet and said magnetic field portion comprises one of said pole pieces, said one pole piece being provided with a notch or opening cooperating with one of said adjacent coils.
Claim 4
Dependent Claim
48 words
The magnet-type AC generator as set forth in claim 2, in which said two adjacent coils are arranged in the axial direction of said generator and said notch or opening is provided in one half section of said one pole piece in the axial direction of said generator.
Claim 5
Dependent Claim
28 words
The magnet-type AC generator as set forth in claim 2, in which said notch or opening in the one pole piece is filled with a non-magnetic balancing weight.
Claim 6
Dependent Claim
28 words
The magnet-type AC generator as set forth in claim 3, in which said notch or opening of the one pole piece is filled with a non-magnetic balancing weight.
Claim 7
Dependent Claim
20 words
The magnet-type AC generator as set forth in claim 1, in which said stator further includes a battery charging winding.
Claim 8
Dependent Claim
73 words
The magnet-type AC generator as set forth in claim 1, in which said magnetic field means of the rotor comprises a flywheel of magnetic material, a plurality of permanent magnets secured to said flywheel and pole pieces respectively mounted on said permanent magnets, and said magnetic field portion comprises one of said pole pieces, said one pole piece being provided with a notch or opening cooperating with one of said two adjacent coils.
Claim 9
Dependent Claim
48 words
The magnet-type AC generator as set forth in claim 7, in which said two adjacent coils are arranged iN the axial direction of said generator and said notch or opening is provided in one half section of said one pole piece in the axial direction of said flywheel.
Claim 10
Dependent Claim
90 words
The magnet-type AC generator as set forth in claim 1, in which said magnetic field means of the rotor comprises a flywheel of magnetic material, a plurality of permanent magnets secured to said flywheel and pole pieces respectively mounted on said pole, and said flywheel has a sleeve-like magnetic boss or rib through which a rotary shaft extends to hold the flywheel in position, said two adjacent coils being disposed with their axes positioned in a radial direction of said flywheel and one end of the coils facing said rib.
Claim 11
Dependent Claim
42 words
The magnet-type AC generator as set forth in claim 9, in which said magnetic field portion comprises one of said pole pieces and said notch or opening is provided in the one pole piece cooperating with one of said two adjacent coils.
Claim 12
Dependent Claim
48 words
The magnet-type AC generator as set forth in claim 10, in which said two adjacent coils are arranged in the axial direction of said flywheel and said notch or opening is provided in one half section of said one pole piece in the axial direction of said flywheel.
Claim 13
Dependent Claim
41 words
The magnet-type AC generator as set forth in claim 9, in which said magnetic field portion comprises said rib on the flywheel and the rib is provided with an inductor projecting therefrom so as to face one of said adjacent coils.
Claim 14
Dependent Claim
42 words
The magnet-type AC generator as set forth in claim 12, in which said two adjacent coils are arranged in the axial direction of said flywheel and said inductor is provided in one half section of said rib in the axial direction thereof.
Claim 15
Dependent Claim
53 words
The magnet-type AC generator as set forth in claim 12, in which said two adjacent coils are arranged in a common plane in the rotational direction of said rotor and said inductor is so provided on said rib that while said rotor is rotating the inductor faces said two adjacent coils in succession.
Claim 16
Dependent Claim
22 words
The magnet-type AC generator as set forth in claim 8, in which said capacitor charging winding is wound on said firing winding.
References Cited (Backward Citations)
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Cited
US3398353A
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US3405347A
Cited
US3484677A
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US3626273A
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |