Tool for measuring decay in wood

Details Tool for measuring decay in wood Tool for measuring decay in wood

G - Physics

01

N

G01N 3/24 (2006.01) G01N 3/00 (2006.01) G01N 19/00 (2006.01) G01N 33/46 (2006.01)

Patent

CA 2177343

An inspection tool (10) for measuring the extent of internal decay in a wooden object such as a wooden power pole. The tool (10) comprises an elongate probe (12) designed to be inserted in an inspection hole drilled into a power pole. The probe (12) is provided with a pair of barbs (14) protruding therefrom adjacent to one end (16) of the probe. The barbs (14) are designed to engage a side wall of the inspection hole so as to shear the wood fibres in the side wall as the probe is withdrawn. An indicating means (20) is mechanically coupled to the probe (12) for measuring the amount of pull force required to shear the wood fibres in the inspection hole. When the pull force exceeds a predetermined value the indicating means (20) provides an indication of the transition from decaying wood to sound wood. Indicating means (20) includes a deflecting bar (22) designed to provide a measurable deflection as the pull-force required to shear the wood fibres increases during withdrawal of the probe (12) from the inspection hole.

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