Roj Electrotex S.p.a.

Paolo Bobbola

A piezoelectric transducer for yarn feelers for fitting to spinning and weaving machines and devices, constituted by a single ceramic member incorporating the yarn guide and cemented directly to a ceramic piezoelectric element, the size and shape of said member being chosen such that its resonance frequencies are very different from those of the textile machines and devices to which the yarn feeler is to be fitted.

Piezoelectric transducer for yarn feelers, for use on spinning and

An optical sensor of the barrier type for air jet weaving looms comprises two equally orientated, parallel photoelements and two very thin total-transmission optical prisms aligned with the photoelements and insertable between and the reed blades in order to deviate the light rays between the photoelements so that they cross the weft yarn passage channel in the reed.

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Vigliano Biellese, Italy

Paolo Bobbola