TEMPERATURE COMPENSATED LIQUID METERING SYSTEM AND METHOD
First Claim
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1. A condition responsive transducer comprising:
- a parallel-T oscillator having a condition responsive element in the shunt leg of the frequency determining portion thereof, the impedance of said condition responsive element being nonlinearly related to the condition in a manner which coacts with the non-linearity of the oscillator to thereby increase the linearization of the frequency response of the transducer with respect to the condition;
a source of voltage remote from said oscillator;
an output terminal remote from said oscillator;
means for applying voltage from said source to said oscillator and to said output terminal;
switch means adjacent to said oscillator and responsive to said oscillator for modifying the application of voltage from said source to said output terminal; and
means adjacent to said oscillator for reducing the effect on said oscillator of voltage modifications on said output terminal.
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Abstract
Method and apparatus for correcting a manifestation of fluid flow for variations in the temperature of the fluid to provide an indication of volume corrected to a predetermined temperature. A novel transducer is provided through the utilization of a thermistor in the shunt arm of a parallel-T oscillator.
4 Citations
1 Claim
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1. A condition responsive transducer comprising:
- a parallel-T oscillator having a condition responsive element in the shunt leg of the frequency determining portion thereof, the impedance of said condition responsive element being nonlinearly related to the condition in a manner which coacts with the non-linearity of the oscillator to thereby increase the linearization of the frequency response of the transducer with respect to the condition;
a source of voltage remote from said oscillator;
an output terminal remote from said oscillator;
means for applying voltage from said source to said oscillator and to said output terminal;
switch means adjacent to said oscillator and responsive to said oscillator for modifying the application of voltage from said source to said output terminal; and
means adjacent to said oscillator for reducing the effect on said oscillator of voltage modifications on said output terminal.
- a parallel-T oscillator having a condition responsive element in the shunt leg of the frequency determining portion thereof, the impedance of said condition responsive element being nonlinearly related to the condition in a manner which coacts with the non-linearity of the oscillator to thereby increase the linearization of the frequency response of the transducer with respect to the condition;
Specification
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Current AssigneeCarl W. Zimmerman, George V. Copland
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Original AssigneeCarl W. Zimmerman, George V. Copland
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InventorsZimmerman, Carl W., Copland, George V.
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Primary Examiner(s)Kominski, John
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Application NumberUS05/221,708Time in Patent Office788 DaysField of Search331/142,66,65,108,110,141US Class Current331/66CPC Class CodesG01F 15/024 involving digital countingH03B 5/04 Modifications of generator ...H03B 5/26 frequency-determining eleme...
