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Sensing and/or analysis system for thread feeder

  • US 5,377,922 A
  • Filed: 02/02/1993
  • Issued: 01/03/1995
  • Est. Priority Date: 06/06/1990
  • Status: Expired due to Fees
First Claim
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1. A yarn feeding device comprising:

  • a stationary motor housing having an electric drive motor mounted therein, said motor driving a rotatable longitudinally extending hollow shaft;

    a spool body rotatably supported by said hollow shaft and extending substantially coaxially from said housing, said spool body defining a peripheral, longitudinally extending yarn storage surface thereon;

    means for holding said spool body stationary relative to said housing;

    a rotatable winding member fixedly attached to said hollow shaft and positioned between said housing and said spool body, said winding member tangentially winding yarn fed axially through said hollow shaft onto said yarn storage surface at an end thereof adjacent said housing, and yarn being withdrawn from said yarn storage surface at an end thereof remote from said housing;

    a rail fixedly secured to and extending longitudinally from said housing past said spool body and being radially spaced apart from said yarn storage surface; and

    a yarn sensing system including active sensor means positioned within said spool body for signalling the presence or absence of yarn in a yarn sensing area of said yarn storage surface, first wireless communication means located apart from said spool body for receiving signals indicative of the presence or absence of yarn in said yarn sensing area, second wireless communication means located within said spool body for communicating signals from said active sensor means to said first wireless communication means, circuit means for processing signals from said active sensor means, and means located within said spool body for supplying electrical input energy to at least said active sensor means and said second wireless transmission means.

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