Patent ID: 6823603
Filing Date: 2004-11-30
Classification: B43L,E04F

Abstract:
An apparatus for marking an angle relative to a baseline, the apparatus comprising:first and second elongate arms, the second arm having a length greater than that of the first arm, each of said arms having a proximal end and an opposed distal end, the first and second arms being pivotally joined one to the other at their proximal ends by a connecting means having an aperture located therein; first and second anchoring means, the first anchoring means being attached to the distal end of the first arm for anchoring the first arm to a first marker, the first marker marking one end of the baseline located on a work surface, the second anchoring means being attached to the distal end of the second arm for anchoring the second arm to a second marker marking the other end of the baseline to a specified baseline length, the first marker thereby marking a vertex of an inner angle formed by the baseline and a reference line extending from the vertex to a center of the aperture when the arms are fully extended, the baseline length determining the size of the inner angle and determining the size of an outer angle sharing the vertex and formed by the reference line and an extension of the baseline therefrom; and, a chart located on a surface of the first or second arms providing the specified baseline lengths required to achieve inner or outer angles of given sizes so as to enable easy access by the user; whereby the apparatus may be used by a single user to mark the reference line to the desired angle to the baseline, simply by marking both ends of the baseline to a specified length apart and attaching the apparatus to each end thereof thus avoiding the need to directly measure the desired angle, minimizing error by restricting measurements to the length of the baseline alone and enabling the user to mark the inner or outer angle to any size greater than 0 and less than 180 degrees.