US3614892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter temperature compensation system and method
Assignee: M and J DEVELOPMENT Co
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Filing: 1969-04-11
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Granted: 1971-10-26
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Expires: 1989-04-11
Abstract
Abstract SYSTEM AND METHOD RELATING TO LIQUID FLOWMETERS FOR ADDING PULSES TO AND SUBTRACTING PULSES FROM THE FLOWMETER''S DIGITAL PULSE TRAIN IN ACCORDANCE WITH TEMPERATURE DEVIATIONS FROM A REFERENCE TEMPERATURE, VOLUMETRIC FLOW RATE, AND THE COEFFICIENT OF EXPANSION OF THE LIQUID. A SIGNAL HAVING A MAGNITUDE PROPORTIONAL TO THE LIQUID TEMPERATURE AND A FREQUENCY DEPENDENT ON THE FLOW RATE IS GENERATED AND COMPARED WITH A REFERENCE SIGNAL. THE DIF- FERENCE BETWEEN THE TWO SIGNALS IS AMPLIFIED, COMPENSATED IN ACCORDANCE WITH THE COEFFICIENT OF EXPANSION OF THE LIQUID, AND INTEGRATED TO PROVIDE CONTROL OF THE ADDITION AND SUBTRACTION OF PULSES.
Inventors
- 👤 Sidney Allan Ottenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:35
CPC Classifications
G; G01; G01F; G01F15/00; G01F15/02; G01F15/022; G01F15/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |