Device for counting turns unwinding from weft feeders
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United States of America Patent
Stats
-
Sep 10, 1991
Grant Date -
N/A
app pub date -
May 23, 1990
filing date -
Jun 6, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A weft feeder for weaving looms including a fixed drum, a rotating arm winding, a plurality of thread turns on said drum, an asynchronous motor for said rotating arm, braking means for breaking thread unwinding from said fixed drum, a guiding ring for guiding unwound thread and a piezoelectric transducer rigidly associated to the side of the solid of revolution generated by the unwinding thread and adapted to emit an electric pulse upon every passage of the thread at the generatrix of the solid of revolution which is arranged in the meridian plane which contains or intersects the axis of a feeler associated with the transducer.
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