Device to check the presence of threads on spinning machines
AssigneeZignago Tessile SpA
InventorPaolo Sterchele
Life of this patent
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Abstract
Device to check the sensor (of threads on spinning machines (11), which is fitted to a stationary ring rail (15) and cooperates with a traveller (18) set in rotation on a ring (16) by the thread (17), the device (10) at least governing an arresting and cutting means (21) and comprising a microphonic sensor(27) actuated by the shock waves due to the passage of the traveller (18).
Claims9
Device to check the presence of threads on spinning machines, which is fitted to a stationary ring rail and cooperates with a traveller set in rotation on a ring by the thread, the device at least operating means for arresting and cutting thread and being characterized in that the device comprises a microphonic sensor actuated by sound waves due to the passage of the traveller.
A spinning machine comprising:
- a source of thread;
- a drafting unit through which said thread passes;
- thread arresting means for arresting and cutting said thread at a point between said source of thread and said drafting unit;
- a spindle on which a tube is provided to receive spun thread;
- a stationary ring rail cooperating with said spindle and provided with a ring on which is provided a traveller which rotates around said ring as said traveller is drawn by thread;
- a microphonic sensor provided on said stationary ring rail and spaced a predetermined distance from said traveller and thread running therethrough, said microphonic sensor being sensitive to sound generated by pressure waves caused by rotation of said traveller around said ring;
- processing means for processing signals from said microphonic sensor to provide a processed signal reflecting the presence or absence of thread passing through said traveller;
- control means for operating said thread arresting means based on said processed signal.
Dependencies are inferred from the claim text.