1
Richard W Piety, Stewart V Bowers III, David Q Gaddis: System and method for measuring and analyzing electrical signals on the shaft of a machine. CSI Technology, Luedeka Neely & Graham PC, July 18, 2000: US06091236 (98 worldwide citation)

The present invention provides a system and method for monitoring an electrical signal appearing on a rotating machine shaft. The system comprises a probe assembly for placement against the rotating machine shaft that is in electrically conductive contact with the shaft. The probe assembly includes ...


2
Stewart V Bowers III, Kenneth R Piety, William A Davis: Proactive motor monitoring for avoiding premature failures and for fault recognition. CSI Technology, Luedeka Neely & Graham P C, October 21, 1997: US05680025 (40 worldwide citation)

Apparatus which automates the collection of motor temperature, flux and shaft current data for proactive motor maintenance. Motor speed is determined by an analysis of the flux frequency spectrum, and motor load is determined based on speed, from which a normalized thermal parameter is then determin ...


3
Stewart V Bowers III, Kenneth R Piety: Induction motor speed determination by flux spectral analysis. Computational Systems, Luedeka Neely & Graham, June 25, 1996: US05530343 (25 worldwide citation)

Apparatus for determining the rotational speed of an AC induction motor based on a spectrum analysis of a magnetic flux signal. For a Phase I analysis, which is usually sufficient, three sets of families of peaks indicative of possible rotational speeds are defined, and the flux frequency spectrum i ...


4
Kai Bouse, Stewart V Bowers III, Jim Robinson, Richard Piety, Todd Reeves: Machine condition indication system. CSI Technology, Luedeka Neely Group P C, May 8, 2012: US08174402 (9 worldwide citation)

A machine condition monitor resides in close proximity to a machine train, such as an AC inductive electric motor coupled to a driven unit such as a centrifugal pump or fan. A plurality of sensing devices are connected to the machine and the machine condition monitor. Machine state and condition par ...


5
Kenneth R Piety Jr, Stewart V Bowers III, Timothy A Craven: Analog signal preprocessor. Computational Systems, Luedeka Hodges Neely & Graham, September 28, 1993: US05249138 (5 worldwide citation)

The specification describes a system for analyzing and processing an input analog signal. This invention provides an analog signal preprocessor which is operated in conjunction with a main instrument for measuring any defects or wear of machinery parts. The analog signal preprocessor operates to pre ...


6
Raymond E Garvey III, Joseph A Vrba, Stewart V Bowers III, Robert D Skeirik, Hermann Holtmannspötter, Michael D Medley, Kevin Steele, Douglas A Mann: Selective decimation and analysis of oversampled data. Emerson Electric, Luedeka Neely Group P C, October 3, 2017: US09778080

Useful and meaningful machine characteristic information may be derived through analysis of oversampled digital data collected using dynamic signal analyzers, such as vibration analyzers. Such data have generally been discarded in prior art systems. In addition to peak values and decimated values, o ...


7
Stewart V Bowers III, Robert D Skeirik: Analysis of periodic information in a signal. Computational Systems, Luedeka Neely Group P C, October 17, 2017: US09791422

A “periodic signal parameter” (PSP) indicates periodic patterns in an autocorrelated vibration waveform and potential faults in a monitored machine. The PSP is calculated based on statistical measures derived from an autocorrelation waveform and characteristics of an associated vibration waveform. T ...