1
Steven P Nuspl, Edmund P Szmania, John A Kleppe, Peter R Norton: Acoustic pyrometer. The Babcock & Wilcox Company, Vytas R Matas, Robert J Edwards, Eric Marich, July 18, 1989: US04848924 (246 worldwide citation)

An apparatus and method for measuring high temperatures in a boiler transmits pulses of acoustic waves, from one side wall of the boiler to an opposite side wall thereof. Acoustic noise within the boiler, as well as the transmitted pulses of acoustic waves are received at the opposite side of the bo ...


2
John A Kleppe: Method and apparatus for measuring acoustic wave velocity using impulse response. Scientific Engineering Instruments, Graham & James, September 27, 1994: US05349859 (232 worldwide citation)

The transit time of acoustic waves between a generator and a receiver positioned across a fluid chamber is determined by generating acoustic waves using a self-purging pneumatic sound generator, a transducer adjacent the outlet of the sound generator, and a receiving transducer positioned away from ...


3
John A Kleppe: Method and apparatus for flow rate measurement. Scientific Engineering Instruments, Graham & James, February 28, 1995: US05392645 (9 worldwide citation)

The average volumetric velocity U.sub.m of a fluid flowing within a large industrial flue stack is determined by a combination of measurement and calculation techniques. The temperature, velocity head and static pressure of the stack fluid are measured at two points within the bounded path of the fl ...


4
William Norris, John A Kleppe, Dana R McPherson: Apparatus and methods for acoustically determining internal characteristics of an engine and the like. Board of Regents of the University and College System of Nevada on behalf of the University of Nevada Reno, Klarquist Sparkman, July 20, 2010: US07761216 (6 worldwide citation)

Apparatus and methods are disclosed for determining internal engine characteristics using acoustic-vibration data. Exemplary such data are passive acoustic pyrometer data. Acoustic-vibrational frequencies emanating from a running engine are detected and compared to frequencies having known relations ...


5
John A Kleppe: Self-purging pneumatic acoustic generator. Scientific Engineering Instruments, Graham & James, April 11, 1995: US05404833 (4 worldwide citation)

The transit time of acoustic waves between a generator and a receiver positioned across a fluid chamber is determined by generating acoustic waves using a self-purging pneumatic sound generator, a transducer adjacent the outlet of the sound generator, and a receiving transducer positioned away from ...


6
William Norris, John A Kleppe, Dana R McPherson: Apparatus and methods for acoustically determining internal characteristics of an engine and the like. Klarquist Sparkman, February 1, 2007: US20070027607-A1

Apparatus and methods are disclosed for determining internal engine characteristics using acoustic-vibration data. Exemplary such data are passive acoustic pyrometer data. Acoustic-vibrational frequencies emanating from a running engine are detected and compared to frequencies having known relations ...