Ruler-type device for drawing and marking lines of a known length comprises a rectangular object with measurement graduations and additional slots in one side at 5 mm intervals for rapid marking of lengths

摘要

Device for rapid drawing of a line segment comprises a rectangular object with slots every 5 mm. To draw a line of a given length a line is drawn with the lower smooth edge of the object and then markings made in the slots corresponding to the distance of line to be drawn.