DEVICE FOR FINDING THE CENTER OF A CIRCUMFERENCE OF A CIRCLE OR ARC OF A CIRCLE

摘要

The disclosed device comprises a transparent or translucid support (4) and a graphic assembly consisting of the setting out of concentric arcs of a circle (3) with constant pitch, inscribed within four right sectors. The radii of the concentric arcs of a circle (3) of adjacent sectors (7, 10, respectively 8, 11) are shifted by half a pitch.