Apparatus for testing hardness of wooden poles

Details Apparatus for testing hardness of wooden poles Apparatus for testing hardness of wooden poles

1979-12-10

1981-02-10

Yasich, Daniel M.

Measuring and testing

Hardness

By penetrator or indentor

73 85, G01N 342

Patent

active

042494141

ABSTRACT:
A method and apparatus for testing the hardness of wooden telephone and powerline poles to determine whether they are safe for climbing by linemen. A gaff is wedged into the side of the pole a preselected distance under hydraulic pressure. The maximum applied pressure is a measure of the hardness of the wood which correlates well with the results obtained during subjective tests by linemen.

REFERENCES:
patent: 3308654 (1967-03-01), Badgley
patent: 3618369 (1971-11-01), Hamilton et al.
patent: 3934463 (1976-01-01), Vendergagt
patent: 4118975 (1978-10-01), Iwasaki
patent: 4196616 (1980-04-01), Argabrite et al.
Publ. "Is Wood Hardness Affected by Preservative Treatment" R. L. Ethington, pp. 60-61, vol. 22, No. 5, (SD 1 F56) Forest Products Journal, May 1972.

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