Perpetual calendar for wall mounting - with mosaic type frame in which individual mosaics may pivot in their cells

摘要

The perpetual calendar consists of a series of small plaques (8) or mosaics having motifs on their front and rear faces. Each of the plaques (8) is mounted in a frame (2) so that they can pivot around an axis (9) formed in the front part of the frame. The fixed axes (9) are parallel to each other, each having along (16) transverse section, two diametrically opposed rounded surfaces (16). These rounded surfaces (16) are separated by two diametrically opposite flat parts (17). The plaques (8) thus have two stable pivoting positions defined by the two flats (17), parallel to the face of the frame.