US3781118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sedimentation measuring device
Assignee: JOHN SAMARAS & ALEXANDRA SAMARAS
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Filing: 1972-10-27
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Granted: 1973-12-25
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Expires: 1992-10-27
Abstract
Abstract Novel apparatus and process for increasing the reliability of short term sedimentation tests such as those carried out by the measurement of light transmitted through a liquid bearing the falling sediment. A particular advantage of the invention is that it provides a simple and inexpensive means for measuring sedimentation rates on samples in test-tube-type containers without reliance on the care with which the container was filled.
Inventors
- 👤 M Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:47
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/04; G01N15/05
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
143 words
In a sedimentation-monitoring test apparatus of the type that comprises a light source, means to define a substantially horizontal light path, a light-measuring means, and a receptacle intercepting said light path between said light source and measuring means, said receptacle adapted to receive an elongate test tube of a homogeneous dispersion of particulate matter for testing, the improvement wherein said receptacle forms means adapted to hold said test tube so that the axis of said test tube intersects said light path at a right angle and is pivoted about said light path to form a substantial angle between a vertical line passing through said intersection and the axis of the test tube and said light path to provide a constant head of said homogeneous dispersion over said light path, whereby said particulate matter of said homogeneous dispersion falls vertically through said light path.
Claim 2
Dependent Claim
143 words
In a sedimentation-monitoring test apparatus of the type that comprises a light source, means to define a substantially horizontal light path, a light-measuring means, and a receptacle intercepting said light path between said light source and measuring means, said receptacle adapted to receive an elongate test tube of a homogeneous dispersion of particulate matter for testing, the improvement wherein said receptacle forms means adapted to hold said test tube so that the axis of said test tube intersects said light path at a right angle and is pivoted about said light path to form a substantial angle between a vertical line passing through said intersection and the axis of the test tube and said light path to provide a constant head of said homogeneous dispersion over said light path, whereby said particulate matter of said homogeneous dispersion falls vertically through said light path.
Claim 3
Dependent Claim
6 words
establishing a substantially horizontal light path;
Claim 4
Dependent Claim
6 words
establishing a substantially horizontal light path;
Claim 5
Dependent Claim
16 words
Apparatus as defined in claim 1 wherein said angle is from 30 to 60 angular degrees.
Claim 6
Dependent Claim
51 words
Apparatus as defined in claim 1 wherein said container is so positioned between said source and said measuring means that said light path is adapted to pass proximate the bottom of the test tube at a distance less than about one-fourth of the distance along the axis of the test tube.
Claim 7
Dependent Claim
8 words
placing said elongated tube in said light path
Claim 8
Dependent Claim
8 words
placing said elongated tube in said light path
Claim 9
Dependent Claim
50 words
Apparatus as defined in claim 2 wherein said container so positioned between said source and said measuring means that the light path is adapted to fall proximate the bottom of the test tube at a distance less than about one-fourth of the distance along the axis of the test tube.
Claim 10
Dependent Claim
32 words
inclining said tube in a plane at an angle to said path to establish a constant head between the intersection of said light path and an upper wall of said inclined tube;
Claim 11
Dependent Claim
32 words
inclining said tube in a plane at an angle to said path to establish a constant head between the intersection of said light path and an upper wall of said inclined tube;
Claim 12
Dependent Claim
44 words
Apparatus as defined in claim 1, said apparatus integrated into a module with a recording means responsive to said light measuring means and also comprising means adapted to receive and hold individually-removable recording card in a pre-determined position with respect to said recording means.
Claim 13
Dependent Claim
29 words
measuring the light transmitted through two apertures one on each side of said liquid, to determine the rate of sedimentation of particulate matter falling vertically through said light path.
Claim 14
Dependent Claim
29 words
measuring the light transmitted through two apertures one on each side of said liquid, to determine the rate of sedimentation of particulate matter falling vertically through said light path.
Claim 15
Dependent Claim
24 words
Apparatus as defined in claim 5 wherein the time of travel of said recording means across said chart is less than about 15 minutes.
Claim 16
Dependent Claim
45 words
Apparatus as defined in claim 4, said apparatus integrated into a module with a recording means responsive to said light measuring means and also comprising means adapted to receive and hold individual removable recording card in a pre-determined position, with respect to said recording means.
Claim 17
Dependent Claim
24 words
Apparatus as defined in claim 7 wherein the time of travel of said recording means across said chart is less than about 15 minutes.
Claim 18
Dependent Claim
18 words
A process for measuring the sedimentation rates of homogeneous liquid-carried dispersions of particulate matter comprising the steps of
Claim 19
Dependent Claim
18 words
A process for measuring the sedimentation rates of homogeneous liquid-carried dispersions of particulate matter comprising the steps of
Claim 20
Dependent Claim
29 words
A process as defined in claim 9 including maintaining said solids of said dispersion below 10 percent and limiting said measuring to a period of less than 15 minutes.
Claim 21
Dependent Claim
20 words
A process as defined in claim 9 including inclining said elongate tube at an angle of between 30 and 60*.
Claim 22
Dependent Claim
21 words
A process as defined in claim 10 including inclining said the elongate tube at an angle of between 30 and 60*.
Claim 23
Dependent Claim
27 words
A process as defined in claim 9 including positioning the elongated tube so that the light path falls through the lower 25 percent of said elongated tube.
Claim 24
Dependent Claim
27 words
A process as defined in claim 12 including positioning the elongated tube so that the light path falls through the lower 25 percent of said elongated tube.
Claim 25
Dependent Claim
18 words
A process as defined in claim 9 wherein the liquid being tested is a dispersion of vaginal cells.
Claim 26
Dependent Claim
18 words
A process as defined in claim 14 wherein the liquid being tested is a dispersion of vaginal cells.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |