US3965341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow rate computer
Assignee: Electrac Inc
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Filing: 1975-01-10
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Granted: 1976-06-22
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Expires: 1995-01-10
Abstract
Abstract A method of correcting the non-linearity of flow meters to extend their usable range, including alternate means to manually enter fluid viscosity by front panel switches or by an analog to digital converter from a temperature probe. The flow rate computer computes frR, divides it by fr/Mfi to yield an output signal fo = MRfi which is a more accurate and linear signal versus flow representation. The flow rate computer extends flowmeter linear range by as much as 100 to 1.
Inventors
- 👤 Raymond W. Honey
- 👤 Louis Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:04
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/60; G06F7/68; G01; G01F; G01F15/00; G01F15/02; G01F15/022; G01F15/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
259 words
A Flow Rate Computer for correcting the non-linearity of flow meters comprising: converter means for converting an analog representation of viscosity to a digital representation; digital shaper means for digitizing the manual assignment of viscosity and analog representation thereof; a reference oscillator; a first rate multiplier having an input and an output, the input being connected to the digital shaper and reference oscillator whereby the first rate multiplier provides a signal proportional to the reference oscillator frequency and the viscosity; first accumulator means for receiving the output of the first rate multiplier; a second rate multiplier; a read-only memory programmed according to flow meter data to provide a signal R to second rate multiplier having an input and an output, the input being connected to the read-only memory and the reference oscillator whereby the second rate multiplier provides a signal proportional to the reference oscillator frequency and R; a first divider with an input connected to the reference oscillator whereby the first divider provides for division of the reference oscillator frequency by a pre-set integer determined by the flow meter characteristics; a second accumulator means for receiving the output of the first divider; a latch means for updating the number stored in the second accumulator; second divider means for dividing output of first rate multiplier by the number held in the latch; a third rate multiplier having an input and an output, the input being connected to the digital shaper and second divider means; and a panel rate display actuated by output of second divider or density rate multiplier.
Claim 2
Dependent Claim
259 words
A Flow Rate Computer for correcting the non-linearity of flow meters comprising: converter means for converting an analog representation of viscosity to a digital representation; digital shaper means for digitizing the manual assignment of viscosity and analog representation thereof; a reference oscillator; a first rate multiplier having an input and an output, the input being connected to the digital shaper and reference oscillator whereby the first rate multiplier provides a signal proportional to the reference oscillator frequency and the viscosity; first accumulator means for receiving the output of the first rate multiplier; a second rate multiplier; a read-only memory programmed according to flow meter data to provide a signal R to second rate multiplier having an input and an output, the input being connected to the read-only memory and the reference oscillator whereby the second rate multiplier provides a signal proportional to the reference oscillator frequency and R; a first divider with an input connected to the reference oscillator whereby the first divider provides for division of the reference oscillator frequency by a pre-set integer determined by the flow meter characteristics; a second accumulator means for receiving the output of the first divider; a latch means for updating the number stored in the second accumulator; second divider means for dividing output of first rate multiplier by the number held in the latch; a third rate multiplier having an input and an output, the input being connected to the digital shaper and second divider means; and a panel rate display actuated by output of second divider or density rate multiplier.
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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |