US3988668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic capacitance probe
Assignee: Robertshaw Controls Co
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Filing: 1975-10-17
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Granted: 1976-10-26
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Expires: 1995-10-17
Abstract
Abstract There is disclosed an antistatic capacitance probe including an electrically conductive gland for receipt in a port formed in the wall of a vessel for receiving a flowable material. A tubular central conductor projects axially from the gland and into the vessel and has its projecting extremity encapsulated in a dielectric insulator. An equalizer conductor wire is connected on one end to the gland and is spiral wound around the insulator throughout its length and is in electrical contact with such insulator to thus remove any static charge therefrom and conduct it into the gland, thus preventing static charge buildup on such insulator.
Inventors
- 👤 Elton W. Bowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:22
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/26; G01F23/263; G01F23/268
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
Antistatic capacitance probe for receipt in a port formed in the wall of a vessel and comprising: an electrically conductive gland for receipt in said port; a center conductor mounted on one end of said gland and projecting therefrom; an insulator enclosing the projecting extremity of said conductor; an elongated equalizing conductor connected on one end to the free extremity of said insulator and extending along the exterior of said insulator and connected on its opposite end to said gland, whereby static electrical charges imposed on said insulator along the length thereof will be conducted to said equalizer conductor and to said gland to equalize the electrostatic charge along said insulator.
Claim 2
Dependent Claim
111 words
Antistatic capacitance probe for receipt in a port formed in the wall of a vessel and comprising: an electrically conductive gland for receipt in said port; a center conductor mounted on one end of said gland and projecting therefrom; an insulator enclosing the projecting extremity of said conductor; an elongated equalizing conductor connected on one end to the free extremity of said insulator and extending along the exterior of said insulator and connected on its opposite end to said gland, whereby static electrical charges imposed on said insulator along the length thereof will be conducted to said equalizer conductor and to said gland to equalize the electrostatic charge along said insulator.
Claim 3
Dependent Claim
31 words
Antistatic capacitance probe as set forth in claim 1 wherein: said equalizer insulator is spiraled about the axial length of said conductor and is in electrical contact therewith throughout its length.
Claim 4
Dependent Claim
42 words
Antistatic capacitance probe as set forth in claim 1 wherein: said central conductor is tubular shaped; said insulator closely fits said tubular conductor; and said equalizer conductor is spiral wound about said insulator and is in electrical contact therewith throughout its length.
Claim 5
Dependent Claim
46 words
Antistatic capacitance probe as set forth in claim 1 wherein: said central conductor is cylindrical; said insulator closely fits the periphery of said conductor; and said equalizer conductor is spiral wound about the periphery of said insulator and is in electrical contact therewith throughout its length.
Claim 6
Dependent Claim
30 words
Antistatic capacitance probe as set forth in claim 1 wherein: said equalizer conductor is wound about the periphery of said insulator and is in electrical contact therewith throughout its length.
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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |