needle bar application_number US 79382485 A description with reference to the figures mentioned the actuating device according to the present invention indicated by the reference numeral 1 is located inside a sewing machine 2 which in many respects is of a type known per se the sewing machine 2 comprises a base 3 a main shaft 4 located in the base 3 a column 5 an arm 6 and a headpiece 7 which has passing vertically through it a needle rod 8 carrying a needle 9 at the bottom the device 1 for actuating the travel of the needle 9 extends from the main shaft 4 and comprises a toothed belt 10 which via two pulleys connects the same main shaft 4 to a secondary shaft 11 located inside the arm 6 parallel to the main shaft 4 the secondary shaft 11 is perpendicular to the needle rod 8 and terminates in the vicinity of the latter where a kinematic assembly 12 is provided which assembly is designed to transform the rotary movement of the secondary shaft 11 generated by the main shaft 4 and by a motor driving the latter into the alternating rectilinear movement of the needle rod 8 in an original manner the kinematic assembly 12 shown in fig2.