US3586862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for continuous detection and measurement of suspended solids in liquids
Assignee: Keene Corp
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Filing: 1969-09-15
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Granted: 1971-06-22
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Expires: 1989-09-15
Abstract
Abstract The invention pertains to a device for being inserted in a liquid and being operable to measure or analyze the suspended solids in the liquid, also referred to as turbidity of the liquid. The device operates by directing light into the liquid and measuring the amount of the light reflected by the solids in the liquid with a photocell. A second photocell more remote from the source of light than the first photocell can be employed to compensate for ambient light, and for light reflected from articles remote from the light source, or light which is reflected from the side of a vessel in which the device is located. A still further photocell may be employed which receives light from the light source through a relatively narrow body of the liquid being analyzed and can be employed as a calibrating standard.
Inventors
- 👤 George J Topol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:40
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53; G01N21/84; G01N21/85; G01N21/8507
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
A device according to claim 1, in which said region of the body has an outwardly opening recess therein for receiving liquid, said recess having a first sidewall adjacent said source and having a second sidewall opposed to said first sidewall, a third photocell in said body shielded from radiation entering said region of the body from outside the body, and aligned radiation transmitting means leading from said source to said first sidewall of said recess and from said second sidewall of said recess to said third photocell for illumination of said third photocell by radiation transmitted directly from said source along said radiation transmitting means and through the liquid in said recess.
Claim 2
Dependent Claim
22 words
A device according to claim 2, in which said recess is in the form of a groove extending completely across said body.
Claim 3
Dependent Claim
24 words
A device according to claim 3, in which said first and second photocells are on the same side of said groove as said source.
Claim 4
Dependent Claim
33 words
A device according to claim 1, in which said region of said body is an end thereof and said conduit means is connected to and extends from the opposite end of said body.
Claim 5
Dependent Claim
31 words
A device according to claim 5, in which said body is formed with a cavity, said cavity being filled with a potting material to impart strength and weight to said body.
Claim 6
Dependent Claim
64 words
A device according to claim 6, in which said body is generally cylindrical in longitudinal cross section and is open at said one end thereof, a cylindrical support member sealingly mounted in said open end of said body, said support member having respective axial bores therein receiving said source and photocells, said radiation transmitting sealing material sealingly filling the outer ends of said bores.
Claim 7
Dependent Claim
149 words
A device according to claim 4, in which said body is generally cylindrical in longitudinal cross section and is open at said one end thereof, a cylindrical support member sealingly mounted in said open end of said body, said support member having respective axial bores therein opening outwardly from said body and receiving said source and said first and second photocells, said radiation transmitting sealing material sealingly filling the outer ends of said bores, said groove being formed in said support member receiving said third photocell, holes in said support member, a further bore in said support member receiving said third photocell, holes in said support member leading from the bores for said third photocell and source to said opposed sidewalls of said groove, and the same said radiation transmitting material filling said holes and sealingly filling said further bore between said third photocell and the respective said hole.
Claim 8
Dependent Claim
87 words
A device according to claim 8, in which said further bore for said third photocell is an axial bore in said support member and the pertaining said hole leading therefrom substantially at right angles to the axis thereof near the outer end of said support membEr, said third photocell being positioned in said further bore in a region remote from the said hole, a reflector element at the juncture of said further bore and its said hole to direct radiation entering said hole toward said third photocell.
Claim 9
Dependent Claim
22 words
A device according to claim 9, in which said body is filled with a potting material to impart strength and weight thereto.
Claim 10
Dependent Claim
35 words
A device according to claim 1, in which said second photocell is connected in circuit with said first photocell so as to subtract the signal from said second photocell from that of said first photocell.
Claim 11
Dependent Claim
69 words
A device according to claim 2, in which said second photocell is connected in circuit with said first photocell so as to subtract the signal from said second photocell from that of said first photocell, and said third photocell is connected in circuit with said first and second photocells so that the signal from said third photocell divides the difference between the signals from said first and second photocells.
Claim 12
Dependent Claim
13 words
A device according to claim 1, in which said radiation is infrared radiation.
Claim 13
Dependent Claim
13 words
A device according to claim 1, in which said radiation is visible light.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |