China / 1997-2000
Safe-T Circle Perfect Compass
Safe-T Circle Perfect Compass
The Smithsonian catalogs Safe-T Circle Perfect Compass as compass in its Mathematics records.
WHY IT’S INTERESTING
This instrument consists of two orange molded plastic discs held together by a metal screw and a plastic bolt, a blue pencil, and a blue plastic stylus with a metal point. The pencil and the stylus fit between the discs on opposite sides of the screw. The user adjusts the screw and stylus to the desired diameter for the circle, according to a scale from zero to ten inches on the front of the instr