Sinker selection device in a circular knitting machine

A sinker selection device in a circular knitting machine that comprises:

• a needle cylinder;
• a sinker ring associated coaxially with the needle cylinder at an upper end thereof;
• a sinker cap that faces said sinker ring in an upward region thereof, said sinker ring being actuatable with a rotary motion about a sinker ring axis with respect to said sinker cap;
• sinkers;
• sinker actuation cams that face in an upward region thereof said sinker ring and are associated with said sinker cap;
• a plurality of radial slots formed in said sinker ring, said slots each accommodating slidingly corresponding one of said sinkers, each said sinkers having at least one heel that protrudes upwardly from the radial slot to engage the sinker actuation cams;
• selectors, being one for each one of said radial slots, each selector facing an end of the corresponding radial slot that is directed away from the sinker ring axis, and being oscillatable on a radial plane with respect to the sinker ring in order to pass from active to inactive positions, and being each connected to a corresponding sinker arranged in a corresponding radial slot in order to induce a different actuation of the corresponding sinker along the corresponding radial slot, depending on whether said selector is in the inactive position or in the active position;
• and a selection actuator which faces laterally the sinker ring and is adapted to engage on command said selectors in order to transfer the selectors from the inactive position to the active position.