All purpose angle sector e.g. contour model, for cutting door frame, has chains connected together with limbs, and retaining devices attached to limbs, so that limbs are locked, where sector represents forms and shapes, while measures angle

摘要

The sector (2) has chains, which are movable and connected together with uniform limbs (1), and retaining devices attached to each limbs, so that the limbs are locked. The sector represents forms and shapes, while measures angles, and small corners and U-shaped openings are formed and/or measured by the sector. A yardstick is too large in order to fit into the openings. A connection is gripped between the limbs by semicircular concave and/or convex shapes, so that different angular positions are determined.