GB627567A - Improvements in yarn tensioning apparatus - Google Patents

Abstract

627,567. Yarn tensioning and guiding devices, DEWAS, R. May 20, 1946, No. 15231. Convention date, March 26. [Class 120 (ii)] Yarn tensioning apparatus comprises one or more disc tension devices, each having an apertured lower disc revoluble on a ring support, a fixed spindle with its lower end above the upper plane of the lower disc, an apertured upper disc arranged for free rotation about the spindle, means limiting the upward movement of the upper disc and means for guiding the yarn in a straight line between upper and lower discs When a series of tension devices are arranged side by side, the stationary ring supports 5 may be mounted on a common bracket 7 associated with a support 2, or the ring supports may be upheld by the support 2 through vertical rods also serving to limit the amount of transverse movement of the yarn a. Stop fingers 17 may be hung from the support 2, when a bracket 7 is used. The ring supports 5 may be provided with shock absorbing material upon which the lower discs 4 rest. The upper discs 3 may be weighted by loading rings 8 or by springs and, in order to limit the amplitude of the jumps of the upper discs 3 as the yarn passes beneath them stop rods 11, adjustable in height, are mounted, either on the support 2 or on the spindles 1. A U-shaped guide 31 is provided for the yarn a as it leaves the tension discs and a guide comprising two slotted plates 19, 20, spaced by a plate 29, is located in front of the discs. A recess 26, Fig. 9, cut from the plate 20, terminates in a slot 28 and a recess 22 in the plate 19 leads to a slot 25, which may be so arranged as to allow the yarn a to pass straight through the guide, or to bend the yarn to reduce kinking. When two parallel series of tension devices are employed, a yarn guide may be used in which the rear plate has two recesses and two slots.