Patent DE127780C successfully refreshed from Google Patents.
Patent US3694087A successfully refreshed from Google Patents.
US3694087A
Expired / Lapsed
US
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Suspended particle light reflection measurement method and apparatus
Assignee: Individual
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Filing: 1970-11-05
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Granted: 1972-09-26
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Expires: 1990-11-05
Abstract
Abstract An apparatus and method for measuring the content of material suspended in liquids or the turbidity of liquids by illuminating the liquid with a light source and a photo-electrical registration of the intensity of the reflected light comprising a tubular nozzle arranged to provide a jet of liquid. Said jet of liquid being illuminated through a gap substantially perpendicularly to said jet, whereupon the intensity of the light reflected from particles in said jet is measured at an angle to that at which the light falls.
Inventors
- 👤 Arne Robert Lindberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:58
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A method of measuring the content of material suspended in a liquid or the turbidity of a liquid comprising: producing a free jet of liquid by means of a nozzle; illuminating said jet of liquid with incident light from a light source by passing said light through a gap substantially perpendicular to the direction of said liquid jet; and photoelectrically measuring the intensity of light reflected at an angle to the direction of said incident light from particles suspended in said liquid jet.
Claim 2
Independent Claim
83 words
A method of measuring the content of material suspended in a liquid or the turbidity of a liquid comprising: producing a free jet of liquid by means of a nozzle; illuminating said jet of liquid with incident light from a light source by passing said light through a gap substantially perpendicular to the direction of said liquid jet; and photoelectrically measuring the intensity of light reflected at an angle to the direction of said incident light from particles suspended in said liquid jet.
Claim 3
Dependent Claim
112 words
Apparatus for measuring the content of material suspended in liquids or the turbidity of liquids comprising: a tubular nozzle for directing a free jet of liquid through an examining space; a light source at a distance from said examining space for directing a ray of light on to the jet of liquid in the examining space; a screening element located between said light source and said examining space for intermittently screening off said light ray from said liquid jet; a photo-sensitive element arranged to receive light reflected from particles in said liquid jet at an angle with respect to said light ray; and means to measure the intensity of said reflected light.
Claim 4
Dependent Claim
112 words
Apparatus for measuring the content of material suspended in liquids or the turbidity of liquids comprising: a tubular nozzle for directing a free jet of liquid through an examining space; a light source at a distance from said examining space for directing a ray of light on to the jet of liquid in the examining space; a screening element located between said light source and said examining space for intermittently screening off said light ray from said liquid jet; a photo-sensitive element arranged to receive light reflected from particles in said liquid jet at an angle with respect to said light ray; and means to measure the intensity of said reflected light.
Claim 5
Dependent Claim
17 words
The apparatus according to claim 2 wherein said tubular nozzle comprises material impeding the growth of bacteria.
Claim 6
Dependent Claim
29 words
The apparatus according to claim 2 wherein said ray of intermittently screened light is directed in a direction substantially perpendicular to the direction of flow of said liquid jet.
References Cited (Backward Citations)
US2237193A
Cited
US3248551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |