Pressure responsive apparatus
First Claim
1. PRESSURE RESPONSIVE APPARATUS COMPRISING A U-TUBE OF ELECTRICALLY NON-CONDUCTIVE MATERIAL CONTAINING A CONDUCTIVE LIQUID, MEANS FOR APPLYING THE PRESSURE TO WHICH THE APPARATUS IS TO RESPOND TO ONE LIMB OF THE U SO THAT THE RELATIVE LIQUID LEVELS IN THE TWO LIMBS DEPEND ON THE APPLIED PRESSURE, TRANSDUCING MEANS ON EACH LIMB FOR PRODUCING AN ELECTRICAL SIGNAL DEPENDENT ON THE LEVEL OF THE LIQUID IN THE LIMB AND COMBINING MEANS FOR COMBINING SAID ELECTRICAL SIGNALS TO PRODUCE A COMBINED OUTPUT DEPENDENT ON THE RELATIVE LIQUID LEVELS, EACH OF SAID TRANSDUCING MEANS MAKING USE OF THE LIQUID AS A FIRST ELECTRODE AND HAVING A SECOND ELECTRODE FORMED OF CONDUCTIVE MATERIAL OUTSIDE SAID TUBE, A CONDUCTIVE SCREEN OVER SAID SEOCND ELERCTRODE WHICH SCREEN EXTENDS AXIALLY IN BOTH DIRECTIONS BEYOND SAID SECOND ELECTRODE, A NEUTRAL LINE TO WHICH SAID SCREENS ARE ELECTRICALLY CONNECTED, AND MEANS FOR APPLYING AN ALTERNATING VOLTAGE BETWEEN ONE OF THE ELECTRODES AND SAID NEUTRAL LINE WHEREBY THE RESULTANT CURRENT BETWEEN THE OTHER ELECTRODE AND THE NEUTRAL LINE DEPENDS ON THE LIQUID LEVEL WITH RESPECT TO THE SECOND ELECTRODE.
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1 Claim
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1. PRESSURE RESPONSIVE APPARATUS COMPRISING A U-TUBE OF ELECTRICALLY NON-CONDUCTIVE MATERIAL CONTAINING A CONDUCTIVE LIQUID, MEANS FOR APPLYING THE PRESSURE TO WHICH THE APPARATUS IS TO RESPOND TO ONE LIMB OF THE U SO THAT THE RELATIVE LIQUID LEVELS IN THE TWO LIMBS DEPEND ON THE APPLIED PRESSURE, TRANSDUCING MEANS ON EACH LIMB FOR PRODUCING AN ELECTRICAL SIGNAL DEPENDENT ON THE LEVEL OF THE LIQUID IN THE LIMB AND COMBINING MEANS FOR COMBINING SAID ELECTRICAL SIGNALS TO PRODUCE A COMBINED OUTPUT DEPENDENT ON THE RELATIVE LIQUID LEVELS, EACH OF SAID TRANSDUCING MEANS MAKING USE OF THE LIQUID AS A FIRST ELECTRODE AND HAVING A SECOND ELECTRODE FORMED OF CONDUCTIVE MATERIAL OUTSIDE SAID TUBE, A CONDUCTIVE SCREEN OVER SAID SEOCND ELERCTRODE WHICH SCREEN EXTENDS AXIALLY IN BOTH DIRECTIONS BEYOND SAID SECOND ELECTRODE, A NEUTRAL LINE TO WHICH SAID SCREENS ARE ELECTRICALLY CONNECTED, AND MEANS FOR APPLYING AN ALTERNATING VOLTAGE BETWEEN ONE OF THE ELECTRODES AND SAID NEUTRAL LINE WHEREBY THE RESULTANT CURRENT BETWEEN THE OTHER ELECTRODE AND THE NEUTRAL LINE DEPENDS ON THE LIQUID LEVEL WITH RESPECT TO THE SECOND ELECTRODE.
Specification
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Current AssigneeRaymond Calvert
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Original AssigneeRaymond Calvert
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InventorsCalvert, Raymond
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Application NumberUS04/278,273Time in Patent Office932 DaysField of SearchUS Class Current73/749CPC Class CodesG01L 9/0095 using variations in capacit...G01L 9/12 by making use of variations...
