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AssigneeRieter Machine Works, Ltd.
InventorsGelli Spescha, Andre Lattion
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A measuring head is used to measure a yarn characteristic while generating a continuous signal proportional to variations in the measured characteristic. The signal is multiplied by an identical second signal obtained either from a second measuring head located downstream of the first measuring head a distance corresponding to a predetermined periodic interval of yarn length (L) or by a time-delay of the first signal corresponding to the periodic interval (L). The multiplication of the signal deviations occurring at the periodic intervals, should such be present, produces a strong output signal indicative of the yarn irregularities. This output signal can be used to interrupt operation of the yarn processing machinery.
A method of detecting periodic yarn irregularities occuring at predetermined intervals of length in a yarn passing between a yarn forming stage and a yarn winding stage of a yarn producing machine, said method comprising the steps of
An apparatus for detecting periodic yarn irregularities occurring at predetermined intervals of length in a yarn passing between a yarn forming stage and a yarn winding stage of a yarn producing machine, said apparatus comprising
Dependencies are inferred from the claim text.