1
George W Rhodes: Process for drying coal and other conductive materials using microwaves. Ronald R Snider, March 31, 1981: US04259560 (25 worldwide citation)

A process for drying a conductive material, particularly coal, by subjecting the material to microwave energy is disclosed. A conductive aggregate is directed through a region where microwave energy excites absorbed water molecules and the conductive material causing the water to evaporate, leaving ...


2
Albert Migliori, Thomas M Bell, George W Rhodes: Crack detection using resonant ultrasound spectroscopy. The Regents of the University of California Office of Technology Transfer, Ray G Wilson, October 4, 1994: US05351543 (23 worldwide citation)

Method and apparatus are provided for detecting crack-like flaws in components. A plurality of exciting frequencies are generated and applied to a component in a dry condition to obtain a first ultrasonic spectrum of the component. The component is then wet with a selected liquid to penetrate any cr ...


3
George W Rhodes, James Schwarz: Relative resonant frequency shifts to detect cracks. Quatro Corporation, Ronald R Snider, June 20, 1995: US05425272 (21 worldwide citation)

An ultrasonic measurement method for distinguishing between unflawed and flawed parts comprises the steps of detecting at least two prominent resonant response frequencies, measuring the frequency difference between the two frequencies, determining the ratio of the frequency difference to one of sai ...


4
George W Rhodes: Method for resonant measurement. Quatro Corporation, Ronald R Snider, May 20, 1997: US05631423 (17 worldwide citation)

A method of measurement of objects by resonant ultra sound is used to determine object surface to near surface flaws. First, the frequency for expected degenerate surface acoustic wave responses is determined for one or more input frequencies and then splitting of degenerate resonant modes are obser ...


5
George W Rhodes, Albert Migliori: Ultrasonic differential measurement. Quatro Corporation, Ronald R Snider, April 25, 1995: US05408880 (16 worldwide citation)

A method and apparatus for ultrasonic resonance testing of an object is shown and described. Acoustic vibrations are applied to an object at a plurality of frequencies. Measurements of the object's vibrational response are made simultaneously at different locations on said object. The input frequenc ...


6
George W Rhodes, Albert Migliori, Raymond D Dixon: Method for resonant measurement. March 5, 1996: US05495763 (14 worldwide citation)

A method of measurement of objects to determine object flaws, Poisson's ratio (.sigma.) and shear modulus (.mu.) is shown and described. First, the frequency for expected degenerate responses is determined for one or more input frequencies and then splitting of degenerate resonant modes are observed ...


7
George W Rhodes, Albert Migliori, Tristan Fin, Steven Frank Willard: Method and apparatus for monitoring SF6 gas and electric utility apparatus. Avistar, Snider & Associates, Ronald R Snider, August 14, 2007: US07257496 (2 worldwide citation)

A method for detecting loss of SF6 gas from electrical utility apparatus determines a molar ratio of gas in a container at an initial time and of gas in the container at a subsequent time. Measurement of temperature is determined by averaging ambient temperature and temperature of the surface of the ...


8
Albert Migliori, George W Rhodes: Mutual inductance bridge for detection of degradation in metallic components. Avistar, Snider & Associates, Ronald R Snider, January 18, 2005: US06844722 (1 worldwide citation)

An inductive bridge circuit using mutual inductances to transform impedances is used for detection of wall-thinning defects in metals. The bridge circuit has a first test coil placed adjacent to a good metal section and a second test coil placed adjacent to a metal to be tested. The bridge circuit c ...


9
George W Rhodes: Dynamic ultrasonic resonance testing. Ray G Wilson, July 13, 1999: US05922956

Relevant resonance response characteristics of a sample are determined for use in characterizing the sample for non-destructive testing. The sample is excited by an exciting mechanical input at a plurality of ultrasonic frequencies. The response is separated into in-phase and quadrature components a ...


10
George W Rhodes, Albert Migliori, Tristan Fin, Steven Frank Willard: Method and apparatus for monitoring SF6 gas and electric utility apparatus. Avistar, Snider & Associates, February 1, 2007: US20070027640-A1

A method for detecting loss of SF6 gas from electrical utility apparatus determines a molar ratio of gas in a container at an initial time and of gas in the container at a subsequent time. Measurement of temperature is determined by averaging ambient temperature and temperature of the surface of the ...