Carpenter's tool
OwnerChristopher L. Placeinventor
Life of this patent
Estimating the term…
Abstract
A tool for use by carpenters and the like for conveniently establishing a reference line on a working surface at a predetermined angular disposition from an established base line on said surface. The tool includes an elongated member from which angle lines or cords are each adapted to extend a predetermined distance such that the intersecting terminal ends of such cords in combination with the member, form a triangle having sides of known length. Inasmuch as the length of the triangle's sides are known, the angles included thereby are also known such that a chalked line connected to the member may be utilized to establish a reference line at a known angular disposition to the member. The tool has particular utility when it is desired to establish the angular relationship of a wall to be built with respect to an already existing wall.
Claims10
A tool for conveniently marking a reference line on a working surface at a predetermined angular dispostion from an already established base line on said surface, said tool including an elongated member having generally parallel front and rear walls, said rear wall adapted for disposition along said established base line, a pair of angle lines each mounted on support means in turn attached to said member, said angle lines being extendable and retractable with respect to the front wall of said member at a pair of spaced locations therealong, a marking line associated with said member and extendable from said front wall thereof at a first guide point, and means associated with said angle lines to predetermine the respective lengths that said lines extend from said front wall thereof such that the intersection of said angle lines in front of said member defines a second guide point such that said marking line will define said predetermined angle with said member front wall when aligned along said first and second guide points.
Dependencies are inferred from the claim text.