Title: Electronic equipment for monitoring yarn travel on a textile machine

Abstract: The present invention relates to equipment for monitoring the yarn travel on a textile machine, particularly in the shuttle of a weaving loom, comprising a piezoelectrical yarn sensing unit mounted in the shuttle and an electronic receiving circuitry outside the shuttle. The sensing unit transmits yarn travel signals of a frequency which is determined by one of the natural frequencies of the sensing unit, and the electronic receiving circuitry comprises at least one resonant circuit tuned to that natural frequency.

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Inventors: Domig, Rene (Kusnacht, CH)
Morf, Ernst (Zurich, CH)
Loepfe, Erich (Zollikerberg, CH)

Application Number: 675140
Filing Date: 1976-04-08
Publication_date: 1977-06-28
Assignee: Aktiengesellschaft Gebrueder Loepfe (Wetzikon, CH)
Primary Class(es): 139/336 66/163, 139/341, 139/370.2, 139/371
Other Classes:
US Patent Ref:

3440634	Apr, 1969	Maurmann et al.	139/370.
3467149	Sep, 1969	Dosch et al.	139/371.
3688958	Sep, 1972	Rydborn	139/370.
3757831	Sep, 1973	Loepfe et al.	139/341.
3970115	Jul, 1976	Kenk et al.	139/370.

Other Refs:
Primary Examiner: Jaudon, Henry S.
Assistant Examiner:
Attorney: Kleeman; Werner W.