Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2006-11-14
2006-11-14
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S662000
Reexamination Certificate
active
07135874
ABSTRACT:
A sensor for measurement of small-angle or small-displacement position of a rotational rheometer incorporates multiple independent capacitors in a symmetric relationship. The device presents its output as a standard bridge configured differential signal, which can be interpreted and measured using conventional electronic demodulation means. The device includes an excitation array, a measurement array and an active rotor array. The active rotor array is coupled to a drive shaft of the rotational rheometer and measured relative to the measurement and excitation arrays. The active rotor array is driven by an electrical signal that is precisely matched to signals detected by the measurement array. By driving the active array with signals sensed by the measurement array, the sensor allows for reduced sensitivity to unwanted signals not in the measurement direction.
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Berting John
Garritano Ron
Deb Anjan
Pillsbury Winthrop Shaw & Pittman LLP
Waters Investments Limited
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