US3079797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid level sensing apparatus
Assignee: Honeywell Inc
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Filing: 1960-12-15
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Granted: 1963-03-05
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Expires: 1980-12-15
Abstract
No abstract record available.
Inventors
- 👤 Harry M Hermanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:10
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/26; G01F23/263
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
189 words
APPARATUS FOR MEASURING THE LEVEL OF FLUIDS OF VARYING CONDUCTIVITY AND WHICH ARE CONNECTED TO GROUND POTENTIAL COMPRISING, IN COMBINATION: A SENSING CAPACITOR HAVING A FIRST ELECTRODE AND AN INSULATED SECOND ELECTRODE ARRANGED FOR MOUNTING IN A CONTAINER OF THE FLUID SO THAT A RESISTANCE RS EXISTS FROM THE FIRST ELECTRODE TO GROUND POTENTIAL THROUGH THE FLUID; A FIRST SOURCE OF ALTERNATING VOLTAGE; VARIABLE RESISTANCE MEANS HAVING A RESISTANCE RA; VOLTAGE RESPONSIVE MEANS; MEANS CONNECTING SAID VARIABLE RESISTANCE MEANS AND SAID SENSING CAPACITOR IN SERIES BETWEEN SAID FIRST SOURCE OF ALTERNATING VOLTAGE AND SAID VOLTAGE RESPONSIVE MEANS; A DIELECTRIC CONSTANT COMPENSATING CAPACITOR HAVING A FIRST ELECTRODE AND AN INSULATED SECOND ELECTRODE ARRANGED FOR MOUNTING IN A REPRESENTATIVE SAMPLE OF THE FLUID SO THAT A RESISTANCE RC EXISTS FROM THE FIRST ELECTRODE OF SAID DIELECTRIC CONSTANT COMPENSATING CAPACITOR TO GROUND POTENTIAL THROUGH THE FLUID; A SECOND SOURCE OF ALTERNATING VOLTAGE; REBALANCE RESISTANCE MEANS HAVING A RESISTANCE RB; AND MEANS CONNECTING SAID REBALANCE RESISTANCE MEANS AND SAID DIELECTRIC CONSTANT COMPENSATING CAPACITOR IN SERIES BETWEEN SAID SECOND SOURCE OF VOLTAGE AND SAID VOLTAGE RESPONSIVE MEANS, RA BEING SO CHOSEN THAT THE RELATIONSHIP
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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |