The utility model relates to a stepless adjustable wire tension device for a torque tube.

摘要

1,133,646. Yarn-tensioning device. BARMAG BARMER MASCHINENFABRIK A.G. 8 Nov., 1966 [2 Dec., 1965], No. 50061/66. Heading DID. An adjustable threadtensioning device for twisting - spindles and particularly for those of multiple-twist apparatus, comprises two vertically - arranged braking - surfaces 4, 5 between which the yarn passes and which are offset in relation to the thread-duct 3 in a block 6 so that the path of the thread between the surfaces is offset to one side of the axis of the duct, and a permanent magnet 8 to attract one surface towards the other; the magnet is adjusted axially of a screw as the latter is rotated the position of the magnet and hence the degree of braking, being indicated by a marking on the head of the screw cooperating with a scale on the block. The surface 5 is constituted by the end face of a non-magnetic housing into which the magnet fits to stop it rotating with the screw, and the head of the screw is secured in the block by a ball-catch 11. The surface 4 is a plate of magnetic material which owing to its offset relation to the thread-path is rotated to prevent wear of the plate. The depth of the blind hole 7 in which the plate is disposed is limited to ensure that the plate is maintained in a vertical position and windows are provided in the block through which the device can be observed and cleaned. A metal sheet with rounded edges is included in the block to guide the thread at 13.