Tree felling spotter

Details Tree felling spotter Tree felling spotter

1989-01-06

1990-09-04

Haroian, Harry N.

Geometrical instruments

Straight-line light ray type

Vertical angle

33277, G01C 100

Patent

active

049533037

ABSTRACT:
Disclosed is a specialized sextant of the clinometer type capable of providing the translation of the height of a tree (or any finite line) to a distance along the ground, (or any other orientation sharing a common end point with the first line) on any selected slope of the terrain.
A significant aspect is that by two adjustments, made anywhere within sight of the tree (or finite line) the device directs the user to a point on the ground (or other orientation) which lies at the exact distance from the tree's base that the tree's length is. If the tree is to be cut down, the point on the ground where the top of the tree will hit is located. This is accomplished without scales, calculations, tape measurements, or target settings.

REFERENCES:
patent: 794071 (1905-07-01), Barbow

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