Patent US3215997A successfully refreshed from Google Patents.
US3215997A
Expired / Lapsed
US
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Corona current sensing device
Assignee: Arthur D Little Inc
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Filing: 1963-03-13
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Granted: 1965-11-02
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Expires: 1983-03-13
Abstract
No abstract record available.
Inventors
- 👤 Peter R Leavitt
- 👤 Vonnegut Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:54
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/18; G08B21/185; G01; G01R; G01R29/00; G01R29/24; H; H02; H02G; H02G13/00; H02G13/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
APPARATUS FOR DETECTING ELECTRIC CHARGE IN THE ATMOSPHERE SYMPTOMATIC OF STORMY WEATHER BY SENSING THE ELECTRIC CURRENT THAT FLOWS FROM EXPOSED POINTS ON THE EARTH UNDER THE INFLUENCE OF ATMOSPHERIC CHARGE, COMPRISING: (A) AN EXPOSED ELECTRICALLY CONDUCTING POINT, (B) A CAPACITOR, (C) A CONDUCTOR LEADING FROM SAID POINT TO SAID CAPACITOR, AND FROM SAID CAPACITOR TO GROUND, (D) A SENSOR CONNECTED ACROSS SAID CAPACITOR, AND ADAPTED TO PROVIDE AN ELECTRICAL PULSE OUTPUT BY DISCHARGING SAID CAPACITOR WHEN SAID CAPACITOR BECOMES CHARGED TO A PRESET VALVE, AND (E) AMPLIFYING MEANS ACTUATED BY SAID ELECTRICAL PULSE TO PROVIDE A WARNING SIGNAL.
Claim 2
Dependent Claim
99 words
APPARATUS FOR DETECTING ELECTRIC CHARGE IN THE ATMOSPHERE SYMPTOMATIC OF STORMY WEATHER BY SENSING THE ELECTRIC CURRENT THAT FLOWS FROM EXPOSED POINTS ON THE EARTH UNDER THE INFLUENCE OF ATMOSPHERIC CHARGE, COMPRISING: (A) AN EXPOSED ELECTRICALLY CONDUCTING POINT, (B) A CAPACITOR, (C) A CONDUCTOR LEADING FROM SAID POINT TO SAID CAPACITOR, AND FROM SAID CAPACITOR TO GROUND, (D) A SENSOR CONNECTED ACROSS SAID CAPACITOR, AND ADAPTED TO PROVIDE AN ELECTRICAL PULSE OUTPUT BY DISCHARGING SAID CAPACITOR WHEN SAID CAPACITOR BECOMES CHARGED TO A PRESET VALVE, AND (E) AMPLIFYING MEANS ACTUATED BY SAID ELECTRICAL PULSE TO PROVIDE A WARNING SIGNAL.
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |