A DEVICE FOR DIVIDING AN ANGLE INTO A PLURALITY OF SMALLER EQUAL ANGLES

摘要

A device (10) for dividing an angle into a plurality of smaller equal angles, comprising: a lower translucent sheet (20); and an upper translucent sheet (30) positioned over the lower translucent sheet (20) and pivotally connected to the lower translucent sheet (20) at a pivot point (15) for alignment to a vertex of the angle, to enable the upper translucent sheet (30) to rotate relative to the lower translucent sheet; wherein the translucent sheets (20, 30) are marked with visual indicia corresponding to: a straight arm line (21, 31) for alignment on an arm of the angle; and a plurality of progressive loci curves (22, 32) using a T-tool (90) defined by a straight line (91) of a fixed length between two points (E, F) that is bisected by a bisecting straight line (92) at 90 degrees, each loci curve (22, 32) is formed by marking a point corresponding to a position at point E of the T-tool (90) when the bisecting straight line (92) passes through the vertex of the angle, and point F of the T-tool (90) is initially positioned on the straight arm line (21, 31) or positioned on a previous point E of the T-tool for a previous loci curve (22, 32).