Gebruder Loepfe Ag

Gebrueder Leopfe Ag

Werner Eichenberger

A photoelectrical bobbin feeler, in particular weft bobbin feeler, comprises one light source and two light sensors, or vice versa, two light sources and one light sensor. At least one polaroid filter is arranged in front of the one light source, or one light sensor, respectively, for polarizing the light which is specularly as well as diffusely reflected from the bobbin, and provides for a safer detection of the 'bobbin empty' condition.

Photoelectrical bobbin feeler

An optoelectrical filling or weft bobbin feeler on a shuttle weaving machine, provided with a light source and a light sensor located in a casing which comprises at least one wall mounted in parallel relationship to the shuttle race. Light source and light sensor are arranged in the casing such that the optical axes define a plane forming a small acute angle with said one wall of the casing. Such a bobbin feeler functions to stop the loom in the instant when the thread winding on the bobbin runs out.

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Zurich, Switzerland

Werner Eichenberger