Apparatus and method for measuring the level of a liquid
First Claim
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10. 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.
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10 Claims
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10. 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.
- 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;
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Current AssigneeJohn H. Newitt
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Original AssigneeJohn H. Newitt
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InventorsNewitt, John H.
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Application NumberUS04/299,526Time in Patent Office963 DaysField of SearchUS Class Current73/290.00BCPC Class CodesG01F 23/2966 making use of acoustical re...
