US3879129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for measuring size and concentration of particles
Assignee: ICHIRO KATO PRESIDENT UNIVERSI
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Filing: 1972-09-06
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Granted: 1975-04-22
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Expires: 1992-09-06
Abstract
Abstract Method of and apparatus for measuring size and concentration of particles are disclosed wherein light rays are irradiated upon particles fluidly moving relative to a limited small space. The intensity of the penetrated or diffused light rays through the groups of particles changes in dependence with the particle size and concentration, and it can be represented by non-variable and variable components. The latter component comes from the statistical change of the number and spatial arrangement of the particles with respect to time. The non-variable and variable components of the intensity of the penetrated or diffused light rays are detected to measure the size and concentration of the particles.
Inventors
- 👤 Toshio Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:04
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/02; G01N15/0205
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
An apparatus for simultaneously measuring the size and concentration of particles comprising a tank containing liquid in which are suspended the particles to be measured, a measuring unit connected to said tank for receiving said liquid and passing light rays therethrough to produce an electrical output, a filter circuit connected to said measuring unit for separating said electrical output into direct current and alternating current components, and a recorder connected to said filter curcit and provided with a record sheet on which are recorded said direct current and alternating current components, respectively.
Claim 2
Independent Claim
92 words
An apparatus for simultaneously measuring the size and concentration of particles comprising a tank containing liquid in which are suspended the particles to be measured, a measuring unit connected to said tank for receiving said liquid and passing light rays therethrough to produce an electrical output, a filter circuit connected to said measuring unit for separating said electrical output into direct current and alternating current components, and a recorder connected to said filter curcit and provided with a record sheet on which are recorded said direct current and alternating current components, respectively.
Claim 3
Independent Claim
92 words
An apparatus for simultaneously measuring the size and concentration of particles comprising a tank containing liquid in which are suspended the particles to be measured, a measuring unit connected to said tank for receiving said liquid and passing light rays therethrough to produce an electrical output, a filter circuit connected to said measuring unit for separating said electrical output into direct current and alternating current components, and a recorder connected to said filter curcit and provided with a record sheet on which are recorded said direct current and alternating current components, respectively.
Claim 4
Independent Claim
92 words
An apparatus for simultaneously measuring the size and concentration of particles comprising a tank containing liquid in which are suspended the particles to be measured, a measuring unit connected to said tank for receiving said liquid and passing light rays therethrough to produce an electrical output, a filter circuit connected to said measuring unit for separating said electrical output into direct current and alternating current components, and a recorder connected to said filter curcit and provided with a record sheet on which are recorded said direct current and alternating current components, respectively.
References Cited (Backward Citations)
US3275834A
Cited
US3713743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |