National Metal Refining Company

John L Batton

Frank J Matusik

John V Fitzgerald

John S Vilichka

Gerard Scheider

A transducer for a vibratory viscometer includes a hollow cylindrical sheath and a hollow cylindrical shaft disposed within the cylindrical sheath. The shaft has a first end portion and a second end portion connected to a distal end portion of the sheath. The viscometer includes a sensor tip connected to the distal end portion of the sheath. The sensor tip has an inner surface defining a hollow region and a support tube disposed within the hollow region configured to hold a temperature sensor. The viscometer further includes a crossbar coupled to the first end portion of the shaft.

Vibratory viscometer

A transducer for inline process control of highly viscous fluids at high pressure and high temperature having a torsionally oscillating sensor tip supported by a pressure resistant threaded body portion. The sensor tip, which includes a thermocouple to measure fluid temperature, is driven by a crossarm which oscillates with a constant angular amplitude, the power required to maintain that amplitude despite the viscous resistance offered by the fluid being a measure of the viscosity-density product of the fluid. The crossarm driver and detector electromagnetic coils are oriented at right angles to each other to reduce crosstalk and transducer housing diameter. The associated electronic control unit includes means to compensate for the effects of fluid flow rate and fluid pressure which were found to be encountered with the vibratory viscometer method of measurement when inline measurements are made on high viscosity fluids.

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Metuchen, NJ, United States of America

John L Batton