1
Kim W Atherton, Charles R Clow, Patrick H Mawet: Dielectric liquid level sensor and method. Caterpillar, Robert E Muir, February 21, 1989: US04806847 (72 worldwide citation)

A sensor for sensing the level of oil or transmission fluid under both normal and extreme temperature conditions. The only active components of the sensor have input and leakage currents substantially lower than those of diodes and current sources under high temperature conditions. The sensor has a ...


2
Michael Nahum, Patrick H Mawet: System and method for determination of error parameters for performing self-calibration and other functions without an external position reference in a transducer. Mitutoyo Corporation, Christensen O&apos Connor Johnson Kindness PLLC, December 3, 2002: US06487787 (36 worldwide citation)

A system and method for determination of error parameters for performing self-calibration and other functions in a transducer. The method utilizes the minimum and maximum values of the output signals of the transducer. To obtain these values, the output signals are measured at various times accordin ...


3
Michael M Van Schoiack, Patrick H Mawet: Angular displacement sensor. Baker Hughes, Burns Doane Swecker & Mathis, June 21, 1988: US04752732 (19 worldwide citation)

A rotational displacement sensor includes a pair of coils stationarily mounted adjacent a rotatable cam formed of a metallic material. The coils are energized by high frequency alternating current. A differential amplifier is connected to the coils such that the output of the amplifier is linearly p ...


4
Kim Wesley Atherton, A Brinkley Barr, Thomas M Harmon, Michael M Van Schoiack, Marvin E Vandehey, Richard D Weyerts, Charles R Clow, Patrick H Mawet: Digital oil level sensor. Caterpillar, Terry D Morgan, Robert E Muir, May 24, 1988: US04745893 (18 worldwide citation)

An oil level sensor includes a sensor body adapted to be mounted to the block or casing of an oil-containing reservoir. A probe including a pair of electrodes forming a capacitor extends from the sensor body so that the capacitor will be at least partially immersed in the oil to detect the level the ...


5
Patrick H Mawet: Low voltage low power signal processing system and method for high accuracy processing of differential signal inputs from a low power measuring instrument. Mitutoyo Corporation, Christensen O Connor Johnson Kindness PLLC, February 22, 2005: US06859762 (10 worldwide citation)

A low voltage low power signal processing system and method for use in low power and/or portable measuring instruments such as linear or rotary encoders, electronic calipers and the like. In one embodiment, the analog-to-digital converter is implemented as a parallel, single ramp, with two matched c ...


6
Michael Nahum, Patrick H Mawet: Systems and methods for high-accuracy displacement determination in a correlation based position transducer. Mitutoyo Corporation, Oliff & Berridge, March 29, 2005: US06873422 (9 worldwide citation)

An image comparison method and an interpolation method to determine the image offset corresponding to the extreme value of the comparison contributes to systematic errors in estimating the displacement of the surface from the images. The systematic errors are rejected by correlation-based comparison ...


7
David Skurnik, Patrick H Mawet, Nils Ingvar Andermo: Method for conserving power by adjusting clock frequency based on a repetitive timing cycle. Mitutoyo Corporation, Oliff & Berridge, September 7, 1999: US05948105 (9 worldwide citation)

Power saving methods for a battery powered electronic measurement system includes controlling the clock speed for different subsystems of the electronic measurement system and controlling the timing cycles of a controller of the electronic measurement system. Controlling the clock speed of the diffe ...


8
Patrick H Mawet: Open loop pre-amplifier for an electronic measuring system. Mitutoyo Corporation, Oliff & Berridge, February 9, 1999: US05869999 (6 worldwide citation)

A fast, open-loop amplifier for an electronic measuring system is formed by a folded, differential, open-loop amplifier. This amplifier includes a differential common-source portion, a current mirror portion and a load portion. The current mirror portion is connected between the differential common- ...


9
Patrick H Mawet: Customizable power-on reset circuit based on critical circuit counterparts. Mitutoyo Corporation, Christensen O Connor Johnson Kindness PLLC, February 23, 2010: US07667506 (4 worldwide citation)

A power-on-reset circuit (POR) for integrated circuits that detects the minimum power levels needed to operate the most critical circuit(s) reliably. The circuit is implemented in a customized POR built into a custom IC, and emulates the critical circuit transistors in the custom IC using mimicking ...


10
Nils Ingvar Andermo, Patrick H Mawet, Karl G Masreliez: Method and apparatus for fast sampling in capacitive position transducers. Mitutoyo Corporation, Oliff & Berridge, September 23, 1997: US05670887 (4 worldwide citation)

The fast sampling method for taking a position measurement with an electronic measurement system incorporating a capacitive position transducer of this invention allows such capacitive position transducers to be used in contaminant filled environments, such as on a shop floor or in the outdoors. By ...