Sensitive weighing apparatus
First Claim
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1. A WEIGHING APPARATUS COMPRISING A SPRING CUT FROM A SINGLE CRYSTAL, MEANS FOR APPLYING A MECHANICAL FORCE DERIVED FROM THE WEIGHT TO BE MEASURED TO STRESS THE CRYSTAL SPRING ELASTICALLY, MEANS INCORPORATING A REACTIVE ELECTRICAL IMPEDANCE THE VALUE OF WHICH IS VARIED BY THE DEFLECTION OF THE SPRING CAUSED BY THE APPLICATION OF THE MECHANICAL FORCE, AND ELECTRICAL EVALUATING MEANS FOR EVALUATING THE RESULTING VARIATION IN THE VALUE OF THE IMPEDANCE AND HENCE THE WEIGHT TO BE MEASURED.
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1 Claim
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1. A WEIGHING APPARATUS COMPRISING A SPRING CUT FROM A SINGLE CRYSTAL, MEANS FOR APPLYING A MECHANICAL FORCE DERIVED FROM THE WEIGHT TO BE MEASURED TO STRESS THE CRYSTAL SPRING ELASTICALLY, MEANS INCORPORATING A REACTIVE ELECTRICAL IMPEDANCE THE VALUE OF WHICH IS VARIED BY THE DEFLECTION OF THE SPRING CAUSED BY THE APPLICATION OF THE MECHANICAL FORCE, AND ELECTRICAL EVALUATING MEANS FOR EVALUATING THE RESULTING VARIATION IN THE VALUE OF THE IMPEDANCE AND HENCE THE WEIGHT TO BE MEASURED.
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Current AssigneeGeoffrey Bradfield
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Original AssigneeGeoffrey Bradfield
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InventorsBradfield, Geoffrey
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Application NumberUS04/469,736Time in Patent Office749 DaysField of SearchUS Class Current177/210.00RCPC Class CodesG01G 3/13 having piezoelectric or pie...G01G 7/06 by electrostatic actionG01L 1/144 with associated circuitry G...
