Method of detecting a broken yarn in a row of line up yarns and apparatus therefor
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United States of America Patent
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Sep 20, 1988
Grant Date -
N/A
app pub date -
Mar 25, 1986
filing date -
Mar 25, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for detecting a broken line up yarn, wherein a fine beam is adapted to travel widthwise across a row of line up yarns while it is radiated toward the yarns to cause flickerings which are photoelectrically converted to instantly count the current value for the number of yarns. The current value is compared with a standard threshold value, and if the current value is different from the threshold, an alarm signal is emitted indicating an abnormal condition. The present invention can be used as a broken yarn detecting technique for devices dealing with many line up yarns such as a warp knitting machine, a loom, a warping machine and so on.
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