A roll (12)forrotatinga movable contact (14)of a rotary switchcomprisinga first slot (34) going along the diameter of the roll (12) and open from the top of the roll for re- ceiving the movable contact (14)for contacting with a stationary contact (11) of the ro- tary switch (1), and a second slot (36) arranged perpendicularly to the first slot (34) for receiving teeth (37, 38) of an upper roll to be mounted together with the roll. (Fig. 12)
