Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2008-09-02
2008-09-02
Williams, Hezron E. (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S598000, C073S644000
Reexamination Certificate
active
11038968
ABSTRACT:
A method and apparatus for measuring the quality of live, standing timber employs deep-set spike probes angled to create a longitudinal compression wave. Alignment tools and isolation of the probes provide an improved signal, automated detection of probe separation and amplitude-independent pulse discrimination process ensure higher reliability and repeatability of the measurements, and wireless operation provides operational efficiencies.
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Carter Peter
Ross Robert J.
Sharplin Nigel
Wang Xiping
Boyle Fredrickson , S.C.
Fibre-gen Instruments Limited
Regents of the University of Minnesota
Saint-Surin Jacques M.
The United States of America as represented by the Secretary of
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