Abstract: The needles or teeth are rigidly fixed on longitudinal bars mounted on the cylinder body in such a manner as to be capable of pivotal displacement on the cylinder body about axes parallel to the axis of the cylinder. Locking means carried by the cylinder body cooperate with corresponding angular positioning means carried by each needle bar in order to lock all the bars in any predetermined common angular position, thereby setting the needles or teeth at the required angle of inclination.

Abstract: The yarn-piecing and cleaning system comprises an auxiliary carriage which is separate and distinct from the robot carriage but travels on the same track as this latter, is connected thereto by means of at least one compressed-air duct and contains a compressed-air generating set. Thus the design function of the auxiliary carriage is to supply air directly at the necessary pressure and also serves as a spinning waste reservoir while the robot carriage performs yarn-piecing and cleaning operations as a transfer and control unit.

Abstract: A frame for a textile machine such as a spinning frame, a twisting machine or a rewinding machine, which includes a series of similar stations, said frame comprising a hollow rectilinear central girder having support elements, such as bosses, webs, notches, and bores, which are integral parts of the girder and are adapted to support, directly and with great accuracy, the parts of the various stations of the machine. The girder is preferably made up of a plurality of lengths fitted together end to end, preferably with end faces perfectly perpendicular to the general direction of the girder. The girder may be cast or extruded.