US3274487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Igniter plug with spark-sensing means
Assignee: Motors Liquidation Co
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Filing: 1961-08-15
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Granted: 1966-09-20
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Expires: 1981-08-15
Abstract
No abstract record available.
Inventors
- 👤 William J Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:58
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/58; F; F02; F02P; F02P13/00; H01T13/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
AN IGNITER PLUG HAVING A PAIR OF ELECTRODES WITH END PORTIONS IN SPACED RELATIONSHIP TO PROVIDE A SPARK GAP THEREBETWEEN, ONE OF SAID ELECTRODES HAVING A SECOND PORTION THEREOF ELECTRICALLY GROUNDED, MEANS FOR INDICATING WHETHER ARCING IS OCCURING IN SAID GAP, SAID MEANS INCLUDING A PAIR OF ELECTRICAL CONDUCTORS CONNECTED TO THE GROUNDED ELECTRODE AT SPACED POINTS THEREON LOCATED ALONG THE AXIS OF SAID GROUNDED ELECTRODE BETWEEN SAID END PORTION AND SAID SECOND PORTION TO INDICATE ANY VOLTAGE DROP ACROSS SAID SPACED POINTS.
Claim 2
Dependent Claim
83 words
AN IGNITER PLUG HAVING A PAIR OF ELECTRODES WITH END PORTIONS IN SPACED RELATIONSHIP TO PROVIDE A SPARK GAP THEREBETWEEN, ONE OF SAID ELECTRODES HAVING A SECOND PORTION THEREOF ELECTRICALLY GROUNDED, MEANS FOR INDICATING WHETHER ARCING IS OCCURING IN SAID GAP, SAID MEANS INCLUDING A PAIR OF ELECTRICAL CONDUCTORS CONNECTED TO THE GROUNDED ELECTRODE AT SPACED POINTS THEREON LOCATED ALONG THE AXIS OF SAID GROUNDED ELECTRODE BETWEEN SAID END PORTION AND SAID SECOND PORTION TO INDICATE ANY VOLTAGE DROP ACROSS SAID SPACED POINTS.
References Cited (Backward Citations)
US1395570A
Cited
US1536808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |