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US3553462A
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Apparatus for determining the radiation scattering properties of a fluid(and by ex.)
Assignee: Exotech Inc
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Filing: 1969-12-31
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Granted: 1971-01-05
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Expires: 1989-12-31
Abstract
Abstract Self-calibrating apparatus for determining the radiation scattering properties of a fluid. Radiation from a first source passes through the fluid in a first straight line path to a first radiation detector. Radiation from a second source passes through the fluid to a second radiation detector in a second straight line path intersecting the first path at the scattering angle of interest. The radiation detector outputs are combined to give the scattering coefficient.
Inventors
- 👤 Dennis F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:51
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53; G01N21/532
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
Apparatus as claimed in claim 1 further comprising excitation source means connected to said first and second radiation sources for alternately energizing said first radiation source and said second radiation source.
Claim 2
Dependent Claim
90 words
Apparatus as claimed in claim 2 further comprising: first amplification means coupling said first and second radiation detector to said circuit means and including first gain control means connected to said excitation source means for decreasing the gain of said first amplification means when said first radiation source is energized, and second amplification means coupling said second radiation detector to said circuit means and including second gain control means connected to said excitation source means for decreasing the gain of said second amplification means when said second source is energized.
Claim 3
Dependent Claim
99 words
Apparatus as claimed in claim 1 in which said circuit means includes means for generating the scattering coefficient S theta in accordance with S theta ((A21 A12)/(A11 A22)) 1/2 where A11 is the output from said first radiation detector due to radiation from said first radiation source, A22 is the output from said second radiation detector due to radiation from said second radiation source, A12 is the output from said first radiation detector due to radiation from said second radiation source, and A21 is the output from said second radiation detector due to radiation from said first radiation source.
Claim 4
Dependent Claim
83 words
Apparatus as claimed in claim 4 in which said circuit means includes a logarithmic circuit, means for sequentially applying to said logarithmic circuit the valves of A11, A21, A22 and A12 to generate the logarithms thereof, means for combining the logarithms for generating log S theta 1/2 ((log A21 + log A12) - (log A21 log A12)-(log A11 + log A22, and an antilogarithmic circuit connected to said last named means for generating from log S theta the value of S theta .
Claim 5
Dependent Claim
24 words
Apparatus as claimed in claim 5 in which said circuit means further comprises means for generating the time average value of S theta .
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |