Chain saw log gauge for obtaining firewood logs of uniform lengt

Details Chain saw log gauge for obtaining firewood logs of uniform lengt Chain saw log gauge for obtaining firewood logs of uniform lengt

1989-07-25

1991-01-15

Will, Thomas B.

Geometrical instruments

Straight-line light ray type

Structurally installed

33630, 33286, G01C 302

Patent

active

049843710

ABSTRACT:
A log gauge for a chain saw is provided which enables an operator to repeatedly cut approximately equal lengths of firewood logs with only a minimal amount of effort being required to visually measure the logs. This accomplished by a mirror that is affixed to one leg of a frame member while the other leg is secured to the handle of the chain saw. The mirror is adjusted by an adjusting bolt so the operator can align on a visual indicator relative to the image of the end of the log in the mirror with respect to a scribed line on the mirror. One embodiment of the frame is formed by utilizing a unitary flexible plastic frame with a C-shaped bridge having a reduced cross sectional area that allows one leg to flex relative to the other thereby allowing the operator to adjust the mirror for different lengths of logs. A second embodiment of the invention substitutes a hinge for the C-shaped bridge which reduces the dimensions of the log gauge and does not require that the frame be made of an inherently flexible material.

REFERENCES:
patent: 494988 (1893-04-01), Libbey
patent: 1568759 (1926-01-01), Magin et al.
patent: 2898109 (1959-08-01), Williams
patent: 3364580 (1968-01-01), Lucia
patent: 4060908 (1977-12-01), Skallerup
patent: 4158259 (1979-06-01), Hansen et al.
patent: 4233739 (1980-11-01), Hinrichs
patent: 4319404 (1982-03-01), Brock
patent: 4388762 (1983-06-01), Debell, Jr. et al.
Three pages from Tilton Equipment Company catalog showing their product TL341 on p. 72.

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