1
John V Fitzgerald, Teresa M Walsh, Frank J Matusik, John Stone, Edmond Dougherty, John Batton: Control circuitry for viscosity sensors. National Metal and Refining Company, Arthur L Lessler, October 8, 1991: US05054313 (51 worldwide citation)

Electronic control circuitry for obtaining precise inline process control data as to viscosity of fluids over a wide viscosity range, with high tolerance of ambient noise and vibration. An electromechanical transducer with an oscillating sensor is immersed in a flowing liquid, with the power require ...


2
John V Fitzgerald, Teresa M Walsh: Natonal Metal and Refining Company, Arthur L Lessler, November 26, 1991: US05067344 (18 worldwide citation)

A viscosity measuring transducer especially useful for process control of fluids. The transducer oscillates an immersed blade sensor in the direction of the plane of the blade in order to maximize generation of shear waves and to minimize generation of compression waves. The transducer includes a ba ...


3
John V Fitzgerald, Teresa M Walsh: National Metal and Refining Company, Arthur L Lessler, October 27, 1992: US05157962 (13 worldwide citation)

A viscosity measuring transducer especially useful for process control of fluids. The transducer oscillates an immersed blade sensor in the direction of the plane of the blade in order to maximize generation of shear waves and to minimize generation of compression waves. The transducer includes a ba ...