Operating mechanism for the yarn carriers of circular knitting machines

Claim 1

IN A CIRCULAR KNITTING MACHINE HAVING A NEEDLE CYLINDER AND A PLURALITY OF YARN SUPPLY STATIONS SPACED APART EQUALLY AROUND THE NEEDLE CYLINDER AND EACH INCLUDING AN EQUAL NUMBER OF YARN CARRIERS MOVABLE BETWEEN OPERATIVE AND INOPERATIVE POSITIONS IN RELATION TO THE NEEDLE CYLINDER; THE COMBINATION OF A SET OF CAM RINGS MOUNTED FOR TURNING COAXIALLY WITH RESPECT TO THE NEEDLE CYLINDER, THE NUMBER OF SAID RINGS BEING EQUAL TO SAID NUMBER OF YARN CARRIERS AT EACH YARN SUPPLY STATION, EACH OF SAID CAM RINGS BEING INTENDED TO CONTROL A CORRESPONDING ONE OF THE YARN CARRIERS AT EACH OF THE YARN SUPPLY STATIONS, MEANS OPERATIVELY ASSOCIATED WITH EACH OF THE YARN CARRIERS AT EACH OF THE YARN SUPPLYING STATIONS AND BEING ACTUATED BY THE OUTER PERIPHERIES OF THE CORRESPONDING CAM RINGS TO CONTROL THE SELECTIVE DISPOSITION OF THE ASSOCIATED YARN CARRIERS AT SAID OPERATIVE AND INOPERATIVE POSITIONS OF THE LATTER, SAID OUTER PERIPHERY OF EACH OF SAID CAM RINGS BEING DIVIDED INTO IDENTICALLY SHAPED PROFILED ZONES OF EQUAL LENGTH EACH OCCUPYING AN ANGULAR EXTENT OF THE RELATED RING EQUAL TO THE ANGULAR SPACING BETWEEN SAID EQUALLY SPACED APART YARN SUPPLYING STATIONS SO THAT THE CORRE-