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US3909136A
Expired / Lapsed
US
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Method and apparatus for measuring the optical characteristics of a flowing liquid stream
Assignee: Rank Organization Ltd
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Filing: 1973-08-09
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Granted: 1975-09-30
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Expires: 1993-08-09
Abstract
Abstract A device for measuring the optical characteristics of a flowing liquid stream wherein the stream is formed into liquid segments separated by gaseous segments, a light beam is passed through the segmented stream and detected after passage through the liquid and gaseous segments by a photo-detecting means adapted to provide an output related to the optical characteristics of the liquid.
Inventors
- 👤 Alan John Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:26
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/85
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
In a device for measuring the optical characteristics of a liquid in a flowing stream and having a light source for projecting a beam of light through the stream transversely to the direction of flow thereof and a photo-electric detector for receiving the beam of light after passage thereof through the stream, the improvement comprising: means to break up the flowing stream into a succession of liquid segments separated by gaseous segments, a light-transmitting conduit for carrying the segmented stream through the path of the light beam, means whereby the detector is adpated to provide an output related to the optical characteristics of the liquid, and a comparator arranged to receive the output of the photoelectric detector and provide a reading the value of which is the difference between that obtained when the light beam is traversing a liquid segment and that when the light beam is traversing a gaseous segment.
Claim 2
Dependent Claim
151 words
In a device for measuring the optical characteristics of a liquid in a flowing stream and having a light source for projecting a beam of light through the stream transversely to the direction of flow thereof and a photo-electric detector for receiving the beam of light after passage thereof through the stream, the improvement comprising: means to break up the flowing stream into a succession of liquid segments separated by gaseous segments, a light-transmitting conduit for carrying the segmented stream through the path of the light beam, means whereby the detector is adpated to provide an output related to the optical characteristics of the liquid, and a comparator arranged to receive the output of the photoelectric detector and provide a reading the value of which is the difference between that obtained when the light beam is traversing a liquid segment and that when the light beam is traversing a gaseous segment.
Claim 3
Dependent Claim
27 words
A device according to claim 1, wherein the light source is adapted to project the light beam perpendicularly to the direction of flow of the segmented stream.
Claim 4
Dependent Claim
27 words
A device according to claim 1, wherein the light source is adapted to project the light beam obliquely to the direction of flow of the segmented stream.
Claim 5
Dependent Claim
33 words
A device according to claim 1, further comprising reflectors arranged in the path of the beam of light for reflecting the beam several times through the segmented stream and thence to the detector.
Claim 6
Dependent Claim
30 words
A deVice according to claim 1, wherein the detector is adapted to provide an output which is a function of the mean wavelength of the light waves of the beam.
Claim 7
Independent Claim
104 words
A method of measuring the optical characteristics of a liquid in a flowing stream comprising the steps of: breaking up the flowing stream into a series of liquid segments separated by gaseous segments, passing a beam of light through the segmented stream transversely to the direction of flow, detecting the light beam after passing thereof through the liquid and gasous segments of the stream, providing an output related to the optical characteristics of the liquid, and comparing the respective outputs of the detector due to passage of the light beam through the liquid segments and through the gaseous segments to provide a difference signal.
Claim 8
Independent Claim
104 words
A method of measuring the optical characteristics of a liquid in a flowing stream comprising the steps of: breaking up the flowing stream into a series of liquid segments separated by gaseous segments, passing a beam of light through the segmented stream transversely to the direction of flow, detecting the light beam after passing thereof through the liquid and gasous segments of the stream, providing an output related to the optical characteristics of the liquid, and comparing the respective outputs of the detector due to passage of the light beam through the liquid segments and through the gaseous segments to provide a difference signal.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |