US3719810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog circuits for calculating relative humidity from dew point and dry bulb temperature information
Assignee: Battelle Development Corp
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Filing: 1971-12-15
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Granted: 1973-03-06
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Expires: 1991-12-15
Abstract
Abstract ANALOG CIRCUITS FOR CALCULATING RELATIVE HUMIDITY FROM DEW POINT AND DRY BULB TEMPERATURE INFORMATION IN ACCORDANCE WITH THE CLAUSIUS-CLAPEYRON EQUATION ARE DESCRIBED. TRANSDUCERS GENERATE TWO LIUNEAR CURRENT SIGNALSONE PROPORTIONAL TO THE DRY BULB TEMPERATURE AND THE OTHER PROPORTIONAL TO THE DEW POINT TEMPERATURE. AN ANALOG COMPUTER ACTS ON THE TWO SIGNALS IN ACCORDANCE WITH THE CLAUSIUS-CLAPEYRON EQUATION TO PRODUCE AN OUTPUT VOLTAGE PROPORTIONAL TO THE RELATIVE HUMIDITY. THE ANALOG COMPUTER ACTS IN ACCORDANCE WITH EITHER THE EXACT FORM OF THE CLAUSIUS-CLAPEYRON EQUATION OR A MODIFIED FORM, DEPENDING UPON THE EMBODIMENT OF THE INVENTION BEING USED.
Inventors
- 👤 N Ahlquist
- 👤 R Charlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:28
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/24; G06G7/48; G06G7/56
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |