Patent US3527233A successfully refreshed from Google Patents.
US3893333A
Expired / Lapsed
US
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Device for automatic determination of suspended solids content in water
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1973-11-14
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Granted: 1975-07-08
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Expires: 1993-11-14
Abstract
Abstract A device for automatic determination of suspended solids content in water comprises an automatic sample liquid collection unit, an automatic specimen preparation unit, an automatic filter paper feeding unit, an automatic filter paper transfer unit, an automatic suspended solids filtration unit, an automatic drying unit, an automatic weighing and display unit and an automatic process control unit. A sample liquid automatically collected is prepared automatically to produce a test specimen. The specimen is filtered through a sheet of filter paper supplied by the automatic filter paper feeding unit. The filter paper on which the suspended solids of the specimen are deposited in consequence of the filtration is dried by the automatic drying unit and thereafter weighed. The weight thus taken is automatically converted into a corresponding electrical quantity and forwarded to an arithmetic circuit, in which the suspended solids content of the given liquid is calculated and recorded.
Inventors
- 👤 Hiroshi Sunahara
- 👤 Yutaka Ishihara
- 👤 Noboru Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:38
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/18; G01N5/00; G01N5/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
279 words
A device for the determination of suspended solids content in water, comprising in combination: a sample liquid collection means adapted to collect a sample liquid continuously, a specimen liquid preparation means adapted to agitate the collected sample liquid and meter out a predetermined amount of the prepared specimen liquid; a filter paper feeding means adapted to take out individual sheets of filter paper one by one and deliver the sheet of filter paper onto a turntable disposed over a weighing plate, a filter paper weighing means serving to weigh the filter paper placed on the turntable and register the weight thereof, a specimen liquid filtration means adapted to deliver the predetermined amount of specimen liquid received from the specimen liquid preparation means onto the filter paper of known weight and cause suspended solids to be separated from the specimen liquid in consequence of filtration through the filter paper, a drying means for drying the filter paper on which the suspended solids separated from the liquid are deposited, a determination display means adapted to transfer the dried filter paper to be weighed onto said filter paper weighing means and display and record the difference between the weight of filter paper prior to filtration and the weight thereof after filtration, a means for removing the used filter paper, and automatic process control means for operating automatically and continuously said sample liquid collection means, said specimen liquid preparation means, said filter paper feeding means, said filter paper weighing means, said specimen liquid filtration means, said drying means, said determination display means and said means for removing the used filter paper, whereby said suspended solid content is automatically and continuously determined and recorded.
Claim 2
Independent Claim
279 words
A device for the determination of suspended solids content in water, comprising in combination: a sample liquid collection means adapted to collect a sample liquid continuously, a specimen liquid preparation means adapted to agitate the collected sample liquid and meter out a predetermined amount of the prepared specimen liquid; a filter paper feeding means adapted to take out individual sheets of filter paper one by one and deliver the sheet of filter paper onto a turntable disposed over a weighing plate, a filter paper weighing means serving to weigh the filter paper placed on the turntable and register the weight thereof, a specimen liquid filtration means adapted to deliver the predetermined amount of specimen liquid received from the specimen liquid preparation means onto the filter paper of known weight and cause suspended solids to be separated from the specimen liquid in consequence of filtration through the filter paper, a drying means for drying the filter paper on which the suspended solids separated from the liquid are deposited, a determination display means adapted to transfer the dried filter paper to be weighed onto said filter paper weighing means and display and record the difference between the weight of filter paper prior to filtration and the weight thereof after filtration, a means for removing the used filter paper, and automatic process control means for operating automatically and continuously said sample liquid collection means, said specimen liquid preparation means, said filter paper feeding means, said filter paper weighing means, said specimen liquid filtration means, said drying means, said determination display means and said means for removing the used filter paper, whereby said suspended solid content is automatically and continuously determined and recorded.
Claim 3
Dependent Claim
67 words
A device for the determination of suspended solids in water according to claim 1, wherein the filter paper feeding means is provided at the forward end of an arm thereof with a sucker for attracting a sheet of filter paper by virtue of vacuum produced by a suction pump and is adapted to deliver the attracted filter paper onto the turntable by the reVolution of said arm.
Claim 4
Dependent Claim
52 words
A device for the determination of suspended solids in water according to claim 2, wherein the turntable is provided at the forward end thereof with a circular hole smaller than the filter paper and larger than the weighing plate and is adapted to receive the delivered filter paper concentrically on said hole.
Claim 5
Dependent Claim
44 words
A device for the determination of suspended solids in water according to claim 3, wherein the turntable on which the filter paper is placed is lowered so as to have the filter paper transferred to assume a position for weighing on the weighing plate.
Claim 6
Dependent Claim
67 words
A device for the determination of suspended solids in water according to claim 3, wherein the hole formed at the forward end of the turntable has a diameter larger than any of the diameters of the filtration cylinders and drying cylinders and the weighing plate, the filtration cylinders and the drying cylinders are concentrically positioned with respect to the hole on the circumferential edge of the turntable.
Claim 7
Dependent Claim
78 words
A device for the determination of suspended solids in water according to claim 1, wherein the specimen liquid filtration means comprises an upper filtration cylinder and a lower filtration cylinder so that the filter paper of the known weight is delivered and placed to intervene between the upper and lower filtration cylinders and the specimen liquid is supplied down the upper filtration cylinder onto the filter paper while the lower filtration cylinder is maintained under a reduced pressure.
Claim 8
Dependent Claim
86 words
A device for the determination of suspended solid in water according to claim 1, wherein the drying means comprises an upper drying cylinder fitted with a heating means and a lower drying cylinder so that the filter paper on which separated suspended solids are deposited is delivered and placed to intervene between the upper and lower drying cylinders and it is dried by the heat emanating from the heating means of the upper drying cylinder while the lower drying cylinder is maintained under a reduced pressure.
Claim 9
Dependent Claim
71 words
A device for the determination of suspended solids in water according to claim 1, wherein the means for removing the used filter paper is provided at the forward end of an arm thereof with a sucker for attracting the used sheet of filter paper by virtue of vacuum produced by a suction pump and is adapted to remove the attached filter paper from the turntable by the revolution of said arm.
Claim 10
Dependent Claim
103 words
A device for the determination of suspended solids in water according to claim 1, wherein the arm for the filter paper feeding means and the arm for the means for removal of used filter paper are disposed at a fixed angle from each other, the suckers disposed at the forward ends of said arms simultaneously attract the different sheets of filter paper, and said arms are revolved, while keeping said fixed angle from each other, so as to remove the used sheet of filter paper from the turntable and at the same time deliver a fresh sheet of filter paper onto said turntable.
References Cited (Backward Citations)
US3308649A
Cited
US3686925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |