US3680962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contaminant detector comprising means for selectively applying pressure to liquify bubbles
Assignee: Tokyo Keiki Inc
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Filing: 1970-09-02
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Granted: 1972-08-01
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Expires: 1990-09-02
Abstract
Abstract An instrument for detecting and/or measuring amount of contaminants contained in a liquid comprises a tube through which a liquid to be measured flows, a light source projecting substantially parallel light into the tube, a photoelectric conversion element for receiving light passed through the liquid the electric property of which is changed in accordance with the intensity of light incident thereon, and an indicator for indicating the amount of the contaminants in the liquid. In this case the photoelectric conversion element is changed in its electric property in accordance with the light intensity and is so connected to the indicator that the variation of the electric property of the photoelectric conversion element correspons to the amount of the contaminants.
Inventors
- 👤 Osamu Hayakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:17
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53; G01N21/532
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
An instrument for detecting and/or measuring the amount of contaminants contained in a liquid comprising a tube means, an inlet pipe means connected to said tube means for introducing a liquid to be analyzed into said tube means, a photoelectric conversion element aligned with said tube means, means for passing light through the liquid within said tube means and toward said photoelectric conversion element, said photoelectric conversion element having the property of varying an electrical property in accordance with the intensity of light incident thereon and in accordance with the amount of contaminants contained in said liquid, an exhaust pipe means connected to said tube means for discharging liquid therefrom, an adjustable throttle mEans for selectively applying pressure to said liquid to liquefy bubbles contained in said liquid, and detector means for detecting variation in said electric property of said photoelectric conversion element and indicating the amount of said contaminants contained in said liquid.
Claim 2
Dependent Claim
154 words
An instrument for detecting and/or measuring the amount of contaminants contained in a liquid comprising a tube means, an inlet pipe means connected to said tube means for introducing a liquid to be analyzed into said tube means, a photoelectric conversion element aligned with said tube means, means for passing light through the liquid within said tube means and toward said photoelectric conversion element, said photoelectric conversion element having the property of varying an electrical property in accordance with the intensity of light incident thereon and in accordance with the amount of contaminants contained in said liquid, an exhaust pipe means connected to said tube means for discharging liquid therefrom, an adjustable throttle mEans for selectively applying pressure to said liquid to liquefy bubbles contained in said liquid, and detector means for detecting variation in said electric property of said photoelectric conversion element and indicating the amount of said contaminants contained in said liquid.
Claim 3
Dependent Claim
115 words
An instrument as claimed in claim 1, which includes a branch pipe means connected to said tube means such that the intersecting angle of the longitudinal axes of the tube means and the branch tube means is less than 90* with respect to the direction of light passing through said tube means, a second photoelectric conversion element located in said branch pipe means and receiving light scattered by the contaminants contained in said liquid to change an electrical property thereof in accordance with the intensity of the light incident thereon, both of said photoelectric conversion elements being connected to said detector means to indicate the amount of contaminants contained in said liquid to be measured.
References Cited (Backward Citations)
US3518437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |