Patent EP0649637A1 successfully refreshed from Google Patents.
US3247423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark discharge device with controlled gap
Assignee: Motors Liquidation Co
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Filing: 1963-02-06
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Granted: 1966-04-19
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Expires: 1983-02-06
Abstract
No abstract record available.
Inventors
- 👤 James P Nolta
- 👤 Norman W Schubring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/02; F02P7/03; B; B23; B23H; B23H7/00; B23H7/14; B23H7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
APPARATUS FOR PRODUCING A SPARK DISCHARGE INCLUDING: A FIRST ELECTRODE HAVING A FIXED POSITION; A SECOND ELECTRODE WHICH IS NORMALLY A PREDETERMINED DISTANCE FROM THE FIRST ELECTRODE BUT IS DISPLACEABLE RELATIVE THERETO; MEANS FOR APPLYING A POTENTIAL ACROSS THE FIRST AND SECOND ELECTRODES, THE PREDETERMINED DISTANCE BETWEEN THE ELECTRODES BEING EFFECTIVE TO PREVENT A DISCHARGE OF THE POTENTIAL ACROSS THE ELECTRODES; A PIEZOELECTRIC ELEMENT MECHANICALLY INTERCONNECTED WITH THE SECOND ELECTRODE AND RESPONSIVE TO A SIGNAL VOLTAGE TO EXPAND THEREBY DISPLACING THE SECOND ELECTRODE TOWARD THE FIRST ELECTRODE TO CAUSE A DISCHARGE ACROSS THE ELECTRODES; AND MEANS TO APPLY A SIGNAL VOLTAGE TO THE PIEZOELECTRIC ELEMENT.
Claim 2
Dependent Claim
105 words
APPARATUS FOR PRODUCING A SPARK DISCHARGE INCLUDING: A FIRST ELECTRODE HAVING A FIXED POSITION; A SECOND ELECTRODE WHICH IS NORMALLY A PREDETERMINED DISTANCE FROM THE FIRST ELECTRODE BUT IS DISPLACEABLE RELATIVE THERETO; MEANS FOR APPLYING A POTENTIAL ACROSS THE FIRST AND SECOND ELECTRODES, THE PREDETERMINED DISTANCE BETWEEN THE ELECTRODES BEING EFFECTIVE TO PREVENT A DISCHARGE OF THE POTENTIAL ACROSS THE ELECTRODES; A PIEZOELECTRIC ELEMENT MECHANICALLY INTERCONNECTED WITH THE SECOND ELECTRODE AND RESPONSIVE TO A SIGNAL VOLTAGE TO EXPAND THEREBY DISPLACING THE SECOND ELECTRODE TOWARD THE FIRST ELECTRODE TO CAUSE A DISCHARGE ACROSS THE ELECTRODES; AND MEANS TO APPLY A SIGNAL VOLTAGE TO THE PIEZOELECTRIC ELEMENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |