Aktiengesellschaft Gebruder Loepfe

Aktiengesellschaft Gebrueder Loepfe

Erich Loepfe

Rene Domig

Ernst Morf

Novel method and device for measuring instantaneous changes of the thickness or diameter of travelling yarns and similar structures. The devices comprise sensing means provided with a pair of members contacting the yarn, with one of the members spring loaded toward the other. The distance or the variation of the distance between the contacting members when the yarn travels is detected by a transducer, e.g. of the capacitive type, and translated into electrical sensing signals.

Method and device for measuring the variations of the cross-sectional

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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Zollikerberg, Switzerland

Erich Loepfe