Abstract
An apparatus for recording the load-elongation properties of yarns is described. Essentially, it subjects a length of yarn or staple to a constant rate of elongation to break, or to a repeated cycling of extension and retraction between either predetermined loads or elongations. Auto matic recording of these latter traces at logarithmic intervals may be employed, and an automatic 1-min. delay between cycles at zero extension or zero load may be used if desired. Several traces obtained with this equipment are shown to illustrate its performance.
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