Patent US1449927A successfully refreshed from Google Patents.
Patent US3866074A successfully refreshed from Google Patents.
US3866074A
Expired / Lapsed
US
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Magnetic spark spreader
Assignee: Individual
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Filing: 1973-07-23
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Granted: 1975-02-11
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Expires: 1993-07-23
Abstract
Abstract A spark plug having a superimposed magnetic field for use in internal combustion engines is disclosed. A magnetic field generator, such as a magnet, is disposed in proximity to the anode of the spark plug. The magnet produces a magnetic field which field alters the conductive properties of the envelope surrounding the anode and cathode electrodes. The resultant nonisotropic conductivity, in turn, promotes a larger arc envelope or plasma and hence a better probability of ignition of the combustible mixture within the engine.
Inventors
- 👤 David A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:27
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/40; H01T13/41
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
249 words
A spark plug for use in internal combustion engines, said spark plug being electrically connected to a source of periodically generated electrical current discharges, said spark plug comprising in combination: A. an anode electrode connected to the source of electrical current discharges and said anode electrode extending from one end of said spark plug in juxtaposition with the longitudinal axis thereof; B. a cathode electrode extending from said one end of said spark plug, said cathode electrode being formed in an L and having a first leg of the L parallel to but laterally displaced from the extending end of said anode electrode and a second leg of the L transverse to but displaced from the extremity of said anode electrode such that a current discharge from the source produces an electrostatic field intermediate said anode and cathode electrodes which field is generally parallel to said anode electrode; C. an insulator for electrically shielding said anode electrode from said first leg of said cathode electrode; a bushing for supporting said second leg of said cathode electrode, said bushing being grounded to the internal combustion engine; and E. a magnet means disposed in proximity to said anode electrode for establishing a magnetic field parallel to said anode electrode and intersecting said second leg of said cathode; whereby, the electrostatic field intermediate said anode and said cathode is parallel with the magnetic field, which fields, in combination, produce an arc streamer having a helical locus and a resulting parabolic arc plasma.
Claim 2
Dependent Claim
249 words
A spark plug for use in internal combustion engines, said spark plug being electrically connected to a source of periodically generated electrical current discharges, said spark plug comprising in combination: A. an anode electrode connected to the source of electrical current discharges and said anode electrode extending from one end of said spark plug in juxtaposition with the longitudinal axis thereof; B. a cathode electrode extending from said one end of said spark plug, said cathode electrode being formed in an L and having a first leg of the L parallel to but laterally displaced from the extending end of said anode electrode and a second leg of the L transverse to but displaced from the extremity of said anode electrode such that a current discharge from the source produces an electrostatic field intermediate said anode and cathode electrodes which field is generally parallel to said anode electrode; C. an insulator for electrically shielding said anode electrode from said first leg of said cathode electrode; a bushing for supporting said second leg of said cathode electrode, said bushing being grounded to the internal combustion engine; and E. a magnet means disposed in proximity to said anode electrode for establishing a magnetic field parallel to said anode electrode and intersecting said second leg of said cathode; whereby, the electrostatic field intermediate said anode and said cathode is parallel with the magnetic field, which fields, in combination, produce an arc streamer having a helical locus and a resulting parabolic arc plasma.
Claim 3
Dependent Claim
55 words
The combination as set forth in claim 1 wherein said anode electrode comprises a first segment for connection to the source of the current discharge and a second segment extending from said spark plug into proximity with said second leg of said cathode electrode, and said magnet being disposed intermediate said first and second segments.
Claim 4
Dependent Claim
26 words
The combination as set forth in claim 2 wherein said second segment, in combination with said cathode electrode, defines the arc plasma of the spark plug.
Claim 5
Dependent Claim
30 words
The combination as set forth in claim 1 wherein said magnet is disposed in proximity to one end of said insulator and generally proximate to the periodically generated arc plasma.
Claim 6
Dependent Claim
23 words
The combination as set forth in claim 4 wherein said anode electrode extends through said insulator along the longitudinal axis of said insulator.
Claim 7
Dependent Claim
23 words
The combination as set forth in claim 1 wherein said insulator is formed at least in part of barium ferrite (Ba Fe12 O19).
References Cited (Backward Citations)
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |