Patent US4216673A successfully refreshed from Google Patents.
US4216673A
Expired / Lapsed
US
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Fluid property detection system
Assignee: International Telephone and Telegraph Corp
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Filing: 1979-02-07
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Granted: 1980-08-12
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Expires: 1999-02-07
Abstract
Abstract A differential pressure Δp is detected across an orifice plate in a pipe section. The same differential pressure is also allowed to drive a turbine meter. The turbine meter is conventional and produces electrical output pulses at a frequency f 1 proportional to the volume flow rate therethrough. It then has been found that the properties of a fluid in the pipe section and in the turbine meter may be found automatically by electronic computation of first and second ratios Δp/f.sub.1 and Δp/f.sub.1.sup.2 respectively, where the first and second ratios are proportional to mass flow rate of the fluid in the pipe section or total mass flow when the mass flow rate is integrated with respect to real time, and the density of the fluid respectively.
Inventors
- 👤 Milton H. November
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:47
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/86; G01F1/90; G01N; G01N9/00; G01N9/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
122 words
Fluid detection apparatus comprising: a pipe section; an orifice plate fixed in said pipe section; first means connected through said pipe section on opposite sides of said orifice plate to produce an output Δp proportional to the difference between the pressures on opposite sides of said orifice plate; a turbine meter having connections through said pipe section on opposite sides of said orifice plate, said turbine meter producing pulses at a frequency f 1 proportional to the volume flow rate of a fluid flowing therethrough; and second means for producing an output proportional to the ratio Δp/f.sub.1.sup.n where n is one of the integers 1 and 2, and said ratio is proportional to a property of said fluid in said pipe section.
Claim 2
Dependent Claim
122 words
Fluid detection apparatus comprising: a pipe section; an orifice plate fixed in said pipe section; first means connected through said pipe section on opposite sides of said orifice plate to produce an output Δp proportional to the difference between the pressures on opposite sides of said orifice plate; a turbine meter having connections through said pipe section on opposite sides of said orifice plate, said turbine meter producing pulses at a frequency f 1 proportional to the volume flow rate of a fluid flowing therethrough; and second means for producing an output proportional to the ratio Δp/f.sub.1.sup.n where n is one of the integers 1 and 2, and said ratio is proportional to a property of said fluid in said pipe section.
Claim 3
Dependent Claim
9 words
The invention as defined in claim 1, wherein n=1
Claim 4
Dependent Claim
25 words
The invention as defined in claim 2, wherein said ratio is directly proportional to the mass flow rate of said fluid through said pipe section.
Claim 5
Dependent Claim
37 words
The invention as defined in claim 3, wherein said first means output is an electrical signal, and third means are connected from said second means, said third means including an indicator calibrated in mass per unit time.
Claim 6
Dependent Claim
28 words
The invention as defined in claim 3, including third means connected from second means to produce a signal proportional to the product of said ratio and real time.
Claim 7
Dependent Claim
28 words
The invention as defined in claim 5, including fourth means connected from said third means to indicate said product, said fourth means indicating flow in units of mass.
Claim 8
Dependent Claim
9 words
The invention as defined in claim 1, wherein n=2
Claim 9
Dependent Claim
19 words
The invention as defined in claim 7, wherein said ratio is directly proportional to the density of said fluid.
Claim 10
Dependent Claim
36 words
The invention as defined in claim 8, wherein said first means output is an electrical signal, and third means connected from said second means, said third means including an indicator calibrated in mass per unit volume.
References Cited (Backward Citations)
US2772567A
Cited
US3430489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |