US3741186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric generator for spark ignited engine
Assignee: Mitsubishi Electric Corp
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Filing: 1970-12-18
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Granted: 1973-06-26
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Expires: 1990-12-18
Abstract
Abstract A cup-shaped rotor is provided on the inner wall with plural permanent magnets and on the annular end with an annular groove. With the rotor rotated in synchronism with the operation of an engine the magnets succesively pass past a stationary coil forming a part of a capacitor discharge system for generating the electrical power to produce the spark while a permanent magnet disposed within the groove periodically passes past another stationary coil to generate a voltage permitting the spark to be produced to ignite the engine.
Inventors
- 👤 M Uetani
- 👤 H Doi
- 👤 Y Honsyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:19
CPC Classifications
F; F02; F02P; F02P1/00; F02P1/08; F02P1/086
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
237 words
An electric generation device for use with a spark ignited internal combustion engine, comprising, in combination, a driven rotor member formed of a magnetic material and having an axial annular recess, a first stationary magnetic core disposed opposed to said rotor member and disposed in a plane passing through said rotor within the periphery thereof, a first generating coil inductively disposed around said first stationary magnetic core to generate a voltage in response to the rotational movement of said rotor member, a second stationary magnetic core disposed extending into said axial annular recess opposed to said rotor member, a second generating coil inductively disposed around said second stationary magnetic core to generate a voltage in response to the rotational movement of said rotor member, on said annular surface of said rotor member, a permanent magnet including a first magnetic pole mounted on said rotor member in contact therewith and a second magnetic pole extending away from said rotor member magnetically isolated from said rotor member, said permanent magnet being rotatable along with said rotor member with said second pole passing adjacent said second generating coil to produce a voltage pulse in said second generating coil, said rotor member comprises a recess and said permanent magnet is accommodated within said recess in a position in which said second magnetic pole is spaced away from wall surfaces defining said recess thereby to be magnetically isolated from said rotor member.
Claim 2
Dependent Claim
237 words
An electric generation device for use with a spark ignited internal combustion engine, comprising, in combination, a driven rotor member formed of a magnetic material and having an axial annular recess, a first stationary magnetic core disposed opposed to said rotor member and disposed in a plane passing through said rotor within the periphery thereof, a first generating coil inductively disposed around said first stationary magnetic core to generate a voltage in response to the rotational movement of said rotor member, a second stationary magnetic core disposed extending into said axial annular recess opposed to said rotor member, a second generating coil inductively disposed around said second stationary magnetic core to generate a voltage in response to the rotational movement of said rotor member, on said annular surface of said rotor member, a permanent magnet including a first magnetic pole mounted on said rotor member in contact therewith and a second magnetic pole extending away from said rotor member magnetically isolated from said rotor member, said permanent magnet being rotatable along with said rotor member with said second pole passing adjacent said second generating coil to produce a voltage pulse in said second generating coil, said rotor member comprises a recess and said permanent magnet is accommodated within said recess in a position in which said second magnetic pole is spaced away from wall surfaces defining said recess thereby to be magnetically isolated from said rotor member.
Claim 3
Dependent Claim
38 words
An electric generation device as claimed in claim 1 wherein said recess is formed as an annulus on said annular surface of said rotor member, and said permanent magnet is disposed on one portion of the annular recess.
Claim 4
Dependent Claim
44 words
An electric generation device as claimed in claim 1, including an ignition system, means connecting said second generating coil with said ignition system, and a semiconductor switch in said ignition system receptive of a control signal from said second generating coil for triggering thereof.
Claim 5
Dependent Claim
212 words
An electrical generation device for use with a spark ignited internal combustion engine, comprising, in combination, a driven rotor member formed of a magnetic material having a cup-shaped cross-section, a first permanent magnet disposed on an inner wall surface of a cylindrical portion of said rotor member, a first stationary magnetic core disposed to periodically face said first permanent magnet during the rotational movement of said rotor member, a first generating coil inductively disposed around said first stationary magnetic core to generate a voltage in response to the rotational movement of said first permanent magnet past said first generating coil, said rotor member having a recess disposed on an annular rim side face surface of a cylindrical portion of the said cup-shaped rotor member, a second permanent magnet disposed within said recess and having a first magnetic pole joined to said rotor member and a second magnetic pole magnetically isolated from said rotor member, a second stationary magnetic core disposed in a plane passing through said side face surface to periodically face said second permanent magnet during the rotational movement of said rotor member, and a second generating coil inductively disposed around said second stationary magnetic core to generate a voltage in response to the rotational movement of said second permanent magnet.
Claim 6
Dependent Claim
212 words
An electrical generation device for use with a spark ignited internal combustion engine, comprising, in combination, a driven rotor member formed of a magnetic material having a cup-shaped cross-section, a first permanent magnet disposed on an inner wall surface of a cylindrical portion of said rotor member, a first stationary magnetic core disposed to periodically face said first permanent magnet during the rotational movement of said rotor member, a first generating coil inductively disposed around said first stationary magnetic core to generate a voltage in response to the rotational movement of said first permanent magnet past said first generating coil, said rotor member having a recess disposed on an annular rim side face surface of a cylindrical portion of the said cup-shaped rotor member, a second permanent magnet disposed within said recess and having a first magnetic pole joined to said rotor member and a second magnetic pole magnetically isolated from said rotor member, a second stationary magnetic core disposed in a plane passing through said side face surface to periodically face said second permanent magnet during the rotational movement of said rotor member, and a second generating coil inductively disposed around said second stationary magnetic core to generate a voltage in response to the rotational movement of said second permanent magnet.
Claim 7
Dependent Claim
58 words
An electric generation device as claimed in claim 4 wherein said second stationary magnetic core is U-shaped and has a first leg facing said second magnetic pole of said permanent magnet only in a predetermined section of each complete rotation of said rotor member and second leg always facing the annular side face surface of said rotor member.
Claim 8
Dependent Claim
45 words
An electric generation device as claimed in claim 4 wherein said second permanent magnet is disposed substantially entirely within said recess and said second magnetic pole is spaced away from a wall surface defining said recess thereby to be magnetically isolated from said rotor member.
Claim 9
Dependent Claim
36 words
An electric generation device as claimed in claim 4 wherein said recess is on said annular surface of said rotor member is annular, and said permanent magnet is disposed on one portion of the annular recess.
Claim 10
Dependent Claim
42 words
An electric generation device as claimed in claim 4, including an ignition system having a semiconductor switch, means connecting said second generating coil to said ignition system to apply a control signal from said second generating coil for triggering said semiconductor switch.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |