MECHANISM FOR RECTILINEAR-PROGRESSIVE DISPLACEMENT OF RULER Russian patent published in 1997 - IPC

FIELD: device for drawing parallel lines at any angle. SUBSTANCE: mechanism has rollers mounted in pairs at upper corner portions of drawing board and one roller is positioned at each lower corner. One flexible member embraces two upper rollers so as to define horizontal branches. Other flexible member embraces remaining rollers so as to define vertical and horizontal branches. Middle branches of flexible members are interconnected. T-square is arranged in vertical position and ends of T-square are attached on outer horizontal branches of flexible members. Ruler is mounted on T-square by carriage, which is movable by pulley mechanism. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 3 dwg