Transmission of Rotation from One Shaft to Three

To enable the clock to display the time on three different sides of the tower, an innovative solution was required to transmit rotation from a single main shaft to three separate axes. This technological solution was achieved using bevel gears and cardan joints, representing an exceptional achievement in mechanical design for that era.

The main shaft, which receives movement from the drive drum, is equipped with a central bevel gear. This gear is connected to three other bevel gears, each linked to one of the three axes leading to the hands on the exterior of the tower. The bevel gears allow for the transmission of rotation at a 90-degree angle, while the cardan joints ensure flexibility in case of minor misalignments between the axes.

Precise manufacturing and alignment of the gears and axes are crucial for the synchronization of the hands. Any irregularity could cause deviations in the time displayed on the different sides of the tower.