Screened electromagnetic flowmeter
First Claim
1. MAGNETIC FLOWMETER APPARATUS COMPRISING A TUBULAR MEANS HAVING A LONGITUDINAL AXIS AND THROUGH WHICH FLUID IS ADAPTED TO FLOW, MEANS FOR PRODUCING A MAGNETIC FIELD WITHIN SAID TUBULAR MEANS, ELECTRODE MEANS ADJACENT SAID TUBULAR MEANS WITHIN SAID MAGNETIC FIELD AND EXTENDING LONGITUDINALLY OF SAID TUBULAR MEANS, AN ELECTRICAL NETWORK ELECTRICALLY CONNECTED WITH SAID ELECTRODE MEANS, SAID ELECTRODE MEANS INCLUDING DETECTING ELECTRODE MEANS COMPRISING AT LEAST TWO SEPARATE DETECTING ELECTRODES ELECTRICALLY INSULATED FROM ONE ANOTHER FOR DETECTING ELECTRICAL SIGNALS IN THE FLUID FLOWING THROUGH SAID TUBULAR MEANS, AT LEAST ONE OF SAID DETECTING ELECTRODES BEING A RELATIVELY HIGH IMPEDANCE ELECTRODE, SAID ELECTRODE MEANS ALSO INCLUDING SCREEN ELECTRODE MEANS, A SCREEN SURFACE COMPRISING SAID SCREEN ELECTRODE MEANS AND SAIDHIGH IMPEDANCE DETECTING ELECTRODE MEANS, SAID SCREEN SURFACE EXTENDING IN SURROUNDING SPCED RELATION TO SAID AXIS, SAID SURFACE BEING SUBSTANTIALLY CLOSED PERIPHERALLY THEREOF AND INCLUDING A PLURALITY OF ELECTRICALLY NON-CONDUCTIVE GAPS OF ONLY MINOR PERIPHERALLY EXTENDING DIMENSION S UFFICIENT TO INSULATE CERTAIN PORTIONS OF THESCREEN SURFACE FROM ONE ANOTHER, SAID ELECTRICAL NETWORK INCLUDING MEANS FOR ESTABLISHING ON EACH ELECTRODE MEANS OF SAID SCREEN SURFACE AN ELECTRICAL POTENTIAL WHICH IS A LINEAR FUNCTION OF THE ELECTRICAL POTENTIAL ON SAID DETECTING ELECTRODES, THE PORTION OF THE SCREEN SURFACE ADJACENT SAID RELATIVELY HIGH IMPEDANCE ELECTRODE BEING AT SUBSTANTIALLY THE SAME FLOW GENERATED ELECTRICAL POTENTIAL AS SAID RELATIVELY HIGH IMPEDANCE ELECTRODE.
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Accused Products
6 Citations
1 Claim
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1. MAGNETIC FLOWMETER APPARATUS COMPRISING A TUBULAR MEANS HAVING A LONGITUDINAL AXIS AND THROUGH WHICH FLUID IS ADAPTED TO FLOW, MEANS FOR PRODUCING A MAGNETIC FIELD WITHIN SAID TUBULAR MEANS, ELECTRODE MEANS ADJACENT SAID TUBULAR MEANS WITHIN SAID MAGNETIC FIELD AND EXTENDING LONGITUDINALLY OF SAID TUBULAR MEANS, AN ELECTRICAL NETWORK ELECTRICALLY CONNECTED WITH SAID ELECTRODE MEANS, SAID ELECTRODE MEANS INCLUDING DETECTING ELECTRODE MEANS COMPRISING AT LEAST TWO SEPARATE DETECTING ELECTRODES ELECTRICALLY INSULATED FROM ONE ANOTHER FOR DETECTING ELECTRICAL SIGNALS IN THE FLUID FLOWING THROUGH SAID TUBULAR MEANS, AT LEAST ONE OF SAID DETECTING ELECTRODES BEING A RELATIVELY HIGH IMPEDANCE ELECTRODE, SAID ELECTRODE MEANS ALSO INCLUDING SCREEN ELECTRODE MEANS, A SCREEN SURFACE COMPRISING SAID SCREEN ELECTRODE MEANS AND SAIDHIGH IMPEDANCE DETECTING ELECTRODE MEANS, SAID SCREEN SURFACE EXTENDING IN SURROUNDING SPCED RELATION TO SAID AXIS, SAID SURFACE BEING SUBSTANTIALLY CLOSED PERIPHERALLY THEREOF AND INCLUDING A PLURALITY OF ELECTRICALLY NON-CONDUCTIVE GAPS OF ONLY MINOR PERIPHERALLY EXTENDING DIMENSION S UFFICIENT TO INSULATE CERTAIN PORTIONS OF THESCREEN SURFACE FROM ONE ANOTHER, SAID ELECTRICAL NETWORK INCLUDING MEANS FOR ESTABLISHING ON EACH ELECTRODE MEANS OF SAID SCREEN SURFACE AN ELECTRICAL POTENTIAL WHICH IS A LINEAR FUNCTION OF THE ELECTRICAL POTENTIAL ON SAID DETECTING ELECTRODES, THE PORTION OF THE SCREEN SURFACE ADJACENT SAID RELATIVELY HIGH IMPEDANCE ELECTRODE BEING AT SUBSTANTIALLY THE SAME FLOW GENERATED ELECTRICAL POTENTIAL AS SAID RELATIVELY HIGH IMPEDANCE ELECTRODE.
Specification
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- Resources
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Current AssigneeVincent J. Cushing
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Original AssigneeVincent J. Cushing
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InventorsCushing, Vincent J.
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Application NumberUS04/567,419Time in Patent Office344 DaysField of SearchUS Class Current73/861.14CPC Class CodesG01F 1/58 by electromagnetic flowmeters
