US3746974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil permittivity sensor
Assignee: THEXTON Manufacturing Co
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Filing: 1971-03-25
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Granted: 1973-07-17
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Expires: 1991-03-25
Abstract
Abstract A sensor for determining permittivity of oil and the lubricating ability thereof including capacitor electrodes spaced from each other with the oil sample therebetween, the electrodes respectively having surfaces obliquely confronting each other and lying transverse to each other; the electrodes being respectively formed into the peripheral wall and bottom of an oil cup.
Inventors
- 👤 D Stoakes
- 👤 K Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:51
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/22; G01N27/223
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
A sensor for determining the permittivity and the relative lubricating ability of oil, comprising: a cup for an oil sample and having a peripheral wall and a bottom, and a pair of spaced oil-engaging capacitor electrodes, one forming a portion of the wall oF the cup and the other electrode forming the bottom of the cup and spaced from said one electrode, the bottom of the cup being separate from and movable along the peripheral wall for varying the capacitance of the sensor.
Claim 2
Dependent Claim
83 words
A sensor for determining the permittivity and the relative lubricating ability of oil, comprising: a cup for an oil sample and having a peripheral wall and a bottom, and a pair of spaced oil-engaging capacitor electrodes, one forming a portion of the wall oF the cup and the other electrode forming the bottom of the cup and spaced from said one electrode, the bottom of the cup being separate from and movable along the peripheral wall for varying the capacitance of the sensor.
Claim 3
Dependent Claim
24 words
The sensor according to claim 1 and a threaded stem mounting the bottom of the cup relative to the peripheral wall for movement therealong.
Claim 4
Dependent Claim
123 words
A sensor for determining the dielectric constant and the relative lubricating ability of oil, comprising: container means for an oil sample and having a peripheral wall and a bottom, the peripheral wall including an annular oil-engaging electrode having a peripheral surface lying flush with the inner surface of the wall, the bottom defining a base oil-engaging electrode having a peripheral surface cooperating with the annular electrode and oil sample to define a capacitor, the peripheral surfaces of the annular and base electrodes being substantially perpendicular to each other and in closely spaced and insulated relation, said bottom being formed by the top surface of a base wall entirely filling the peripheral wall and being movable therealong for varying the capacitance between the electrodes.
Claim 5
Dependent Claim
123 words
A sensor for determining the dielectric constant and the relative lubricating ability of oil, comprising: container means for an oil sample and having a peripheral wall and a bottom, the peripheral wall including an annular oil-engaging electrode having a peripheral surface lying flush with the inner surface of the wall, the bottom defining a base oil-engaging electrode having a peripheral surface cooperating with the annular electrode and oil sample to define a capacitor, the peripheral surfaces of the annular and base electrodes being substantially perpendicular to each other and in closely spaced and insulated relation, said bottom being formed by the top surface of a base wall entirely filling the peripheral wall and being movable therealong for varying the capacitance between the electrodes.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |