Measuring and testing – Hardness – By penetrator or indentor
Patent
1986-01-17
1987-06-09
Levy, Stewart J.
Measuring and testing
Hardness
By penetrator or indentor
73 85, G01N 342, G01N 3346
Patent
active
046711058
ABSTRACT:
The invention pertains to a process and to a device for determining the internal condition of trees or wooden components, whereby a needle is inserted into the wood, with the aim of hereby obtaining measured results more precise than possible in the past. The solution proposed is to rotate the needle, whereby the diameter of the needle head is greater than the diameter of the needle shaft, and to measure the power consumption of the needle's drive mechanisms.
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patent: 4249414 (1981-02-01), Barth
patent: 4343179 (1982-08-01), strom et al.
"Is Wood Hardness Affected by Preservative Treatment?"; Forest Products Journal; vol. 22, No. 5, May 1972; pp. 60-61; Robert L. Ethington.
"Erfahrungen mit einem Gerat zur Fauleermittlung an Stehenden Stammen"; Forstw. Cbl.; vol. 81; published 1962, issue 7/8; pp. 222-230; Von H. Zycha et al.
Kamm Willibald F. G.
Voss Siegfried
Levy Stewart J.
Noland Tom
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