RULE HAVING AUXILIARY RULE CROSSING MAIN RULE FOR DRAWING AT RIGHT ANGLE

摘要

PURPOSE:To simply enhance the working efficiency of drawing by providing a main rule having follower plates provided to both ends thereof and the auxiliary rule sliding so as to cross the main rule at a right angle. CONSTITUTION:The auxiliary rule D.B 5 crossing a main rule 1 at a right angle is a drawing board. Follower plates 2, 3 are provided to both ends of the main rule 1 to be used as vibration stoppers during drawing. A roll insertion hole 8 is provided to the auxiliary rule 5 crossing the main rule 1 at a right angle as one for drawing an angle line and used in the drawing of a base line of an arbitrary angle. A hole G is used for drawing an arbitrary circle and dimension graduations E are provided on both sides and there are angle graduations F and this rule is used as a measure, a protractor and a triangle. The rule is universal as one for drawing work in this structure.