Patent US3241368A successfully refreshed from Google Patents.
US3241368A
Expired / Lapsed
US
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Apparatus and method for measuring the level of a liquid
Assignee: Individual
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Filing: 1963-08-02
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Granted: 1966-03-22
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Expires: 1983-08-02
Abstract
No abstract record available.
Inventors
- 👤 John H Newitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:10
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/296; G01F23/2966
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
AN APPARATUS FOR DETERMINING THE LIQUID CONTENT OF A CONTAINER COMPRISING: AN OPEN-ENDED TUBE HAVING ONE END THEREOF IN FLUID COMMUNICATION WITH THE LIQUID, SAID TUBE AND LIQUID FORMING A VARIABLE COLUMNAR ACOUSTIC CAVITY WITHIN SAID TUBE; A MECHANICALLY DAMPED LOUDSPEAKER ACOUSTICALLY COUPLED TO SAID TUBE AT THE OTHER END THEREOF; AN AUDIO AMPLIFIER COUPLED TO SAID LOUDSPEAKER, SAID AMPLIFIER BEING DRIVEN BY A VARIABLE FREQUENCY AUDIO OSCILLATOR HAVING A DIAL CALIBRATED IN TERMS OF LIQUID CONTENT; MEANS FOR DETERMINING THE TEMPERATURE OF THE LIQUID; A TEMPERATURE SCALE MOUNTED ON SAID AUDIO OSCILLATOR COAXIALLY WITH SAID DIAL; A MOVABLE CURSOR PIVOTALLY MOUNTED ON THE AXIS OF SAID DIAL AND TEMPERATURE SCALE; AND ELECTRICAL MEANS FOR DETECTING THE RESONANT ACOUSTIC CAVITY LOADING ON SAID LOUDSPEAKER WHEREBVY THE TEMPERATURE COMPENSATED LIQUID CONTENT OF SAID CONTAINER CAN BE READ DIRECTLY FROM SAID DIAL AFTER ADJUSTMENT OF SAID MOVABLE CURSOR.
Claim 2
Independent Claim
146 words
AN APPARATUS FOR DETERMINING THE LIQUID CONTENT OF A CONTAINER COMPRISING: AN OPEN-ENDED TUBE HAVING ONE END THEREOF IN FLUID COMMUNICATION WITH THE LIQUID, SAID TUBE AND LIQUID FORMING A VARIABLE COLUMNAR ACOUSTIC CAVITY WITHIN SAID TUBE; A MECHANICALLY DAMPED LOUDSPEAKER ACOUSTICALLY COUPLED TO SAID TUBE AT THE OTHER END THEREOF; AN AUDIO AMPLIFIER COUPLED TO SAID LOUDSPEAKER, SAID AMPLIFIER BEING DRIVEN BY A VARIABLE FREQUENCY AUDIO OSCILLATOR HAVING A DIAL CALIBRATED IN TERMS OF LIQUID CONTENT; MEANS FOR DETERMINING THE TEMPERATURE OF THE LIQUID; A TEMPERATURE SCALE MOUNTED ON SAID AUDIO OSCILLATOR COAXIALLY WITH SAID DIAL; A MOVABLE CURSOR PIVOTALLY MOUNTED ON THE AXIS OF SAID DIAL AND TEMPERATURE SCALE; AND ELECTRICAL MEANS FOR DETECTING THE RESONANT ACOUSTIC CAVITY LOADING ON SAID LOUDSPEAKER WHEREBVY THE TEMPERATURE COMPENSATED LIQUID CONTENT OF SAID CONTAINER CAN BE READ DIRECTLY FROM SAID DIAL AFTER ADJUSTMENT OF SAID MOVABLE CURSOR.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |