1
Douglas R Patriquin: Optically powered sensor system. Simmonds Precision Products, Cushman Darby & Cushman, April 11, 1989: US04820916 (37 worldwide citation)

An optically powered sensor system includes a plurality of sensors connected to a system optical bus that communicates with a system controller. Optical energy is transmitted along the bus for distribution to all sensors in the system with return pulses from the various sensors transmitted on the bu ...


2
Sylvester M Ellinger, William B Spillman Jr, Douglas R Patriquin: Method and apparatus for shaft torque measurement with temperature compensation. Simmonds Precision Products, William E Zitelli, Leonard L Lewis, February 2, 1993: US05182953 (21 worldwide citation)

An apparatus and method for measuring the torque of a rotating shaft is provided, utilizing a single sensor which provides a signal which is processed to yield a temperature compensated value of the torque applied to a rotating shaft. A magneto-optic material such as a Faraday film is positioned adj ...


3
William B Spillman Jr, Robert E Rudd III, Sylvester M Ellinger, Douglas R Patriquin, Bruce R Kline: Optical shaft angular and torsional displacement and speed sensing system. Simmonds Precision Products, Dale R Lovercheck, October 17, 1989: US04874245 (15 worldwide citation)

A displacement detector provides a light beam which impinges on an article with different combinations of light altering materials such as reflecting and non-reflecting surfaces, wave retarding plates, and linear polarizers attached to the article to determine angular position, relative angular disp ...


4
Douglas R Patriquin: Encoding system and method for differential capacitive transducer. Simmonds Precision Products, Dale R Lovercheck, December 31, 1991: US05077527 (10 worldwide citation)

A transducer system and method of use thereof by sequentially operating a comparator to produce a series of pulses in which the time distribution of the pulses is representative of the transducer value, and is used to normalize the sensed value in the event that the total transducer value varies due ...


5
William B Spillman Jr, Robert E Rudd III, Michael E Ellinger, Douglas R Patriquin, Bruce R Kline: Optical shaft torsional displacement and speed sensing system. Simmonds Precision Products, Dale R Lovercheck, September 5, 1989: US04863274 (9 worldwide citation)

A rotating shaft torsional displacement and speed detector provides a light beam which impinges on one or both ends of the rotating shaft. Different combinations of beam altering materials such as reflecting and non-reflecting surfaces, wave retarding plates, and linear polarizers are attached to th ...


6
Douglas R Patriquin: Encoding system and method for differential capacitive transducer. December 24, 1991: US05075631 (6 worldwide citation)

A transducer system and method of use thereof by sequentially operating a comparator to produce a series of pulses in which the time distribution of the pulses is representative of the transducer value, and is used to normalize the sensed value in the event that the total transducer value varies due ...