The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 1985
Filed:
Sep. 12, 1983
A Ray Wrobley, Sedona, AZ (US);
James H Sullivan, Sedona, AZ (US);
Other;
Abstract
The 'Cruiser's Crutch' is a slope correcting basal area angle gauge to be used in variable plot sampling for determining basal area in square feet per acre. It incorporates the critical angle for the 10, 20, 30 and 40 basal area factors. This gauge enables the forester or timber cruiser to make the same basal area measurements that would normally require a critical angle gauge for each factor chosen and at the same time compensates for slopes of from zero to ninety percent. The user selects the factor desired and then holds the instrument a fixed distance from his eye, as determined by the larger balls on the attached charin. The larger ball nearest the angle gauge is for 40 factor measurements; the next larger ball, 30 factor; the third, 20 factor and the last for ten factor measurements. (Other basal area factors between 10 and 40 can be easily added if desired.) User then rotates 360.degree. around a point, keeping his eye over the point at all times and the gauge perpendicular to the slope. Any tree that is large enough to subtend the fixed critical angle of the gauge is considered 'in' and is tallied. All trees tallied around the circle are then multiplied by the factor number chosen; the result being equal to basal area per acre.