US3919636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical field change meter
Assignee: United States Department of the Navy
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Filing: 1974-04-29
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Granted: 1975-11-11
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Expires: 1994-04-29
Abstract
Abstract An improved electrical field change meter comprising the improvement of a capacitor being provided that may be used during severe weather conditions such as rainstorms wherein the dielectric constant between the plates, air, is not affected by severe conditions. This is obtained by providing hemispheric shaped condenser plates, one mounted inside the other, and spaced therefrom by insulating standoffs. The entire condenser assembly is sealed to its based member to provide a weatherproof container for the electronic package.
Inventors
- 👤 Arthur A Few
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:54
CPC Classifications
G; G01; G01W; G01W1/00; G01W1/16; G01R; G01R29/00; G01R29/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
An improved electrical field change meter for accurately measuring changes in the atmospheric electrical field comprising: a. a first irregularly shaped metal capacitor plate; b. a second irregularly shaped metal capacitor plate having a shape substantially identical to said first plate; c. insulating standoff means for spacing said first plate a fixed distance from said second plate to effect a capacitor; d. a base plate; e. means for mounting said capacitor to said base plate; f. electrical circuitry being deposited between said base plate and said capacitor for measuring current flow from said first plate to said second plate; g. a first conductor means from said electrical circuitry led thru said base plate to a ground for providing an accurate reading of the current flow; h. a second conductor means from said electrical circuitry led thru said base plate to supply power and to remove electrical data therefrom; and, i. sealing means for providing weather proofing between said base plate and said capacitor.
Claim 2
Dependent Claim
163 words
An improved electrical field change meter for accurately measuring changes in the atmospheric electrical field comprising: a. a first irregularly shaped metal capacitor plate; b. a second irregularly shaped metal capacitor plate having a shape substantially identical to said first plate; c. insulating standoff means for spacing said first plate a fixed distance from said second plate to effect a capacitor; d. a base plate; e. means for mounting said capacitor to said base plate; f. electrical circuitry being deposited between said base plate and said capacitor for measuring current flow from said first plate to said second plate; g. a first conductor means from said electrical circuitry led thru said base plate to a ground for providing an accurate reading of the current flow; h. a second conductor means from said electrical circuitry led thru said base plate to supply power and to remove electrical data therefrom; and, i. sealing means for providing weather proofing between said base plate and said capacitor.
Claim 3
Dependent Claim
24 words
The improved electrical field change meter of claim 1 wherein said first and second irregularly shaped metal capacitor plates are substantially parabolic in shape.
Claim 4
Dependent Claim
24 words
The improved electrical field change meter of claim 1 wherein said first and second irregularly shaped metal capacitor plates are substantially hemispherical in shape.
Claim 5
Dependent Claim
23 words
The improved electrical field change meter of claim 1 wherein said first and second irregularly shaped metal capacitor plates are substantially cone shaped.
References Cited (Backward Citations)
US3586973A
Cited
US3812419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |