Electronic device for controlling weft yarn insertion in looms
AssigneeROJ Electrotex S.p.A.
InventorSergio Vella
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Abstract
Electronic device for controlling weft yarn insertion in continuous weft feed looms, without shuttles, adapted to stop the loom and emit a corresponding signal, not only each time there is a breakage or absence of a weft yarn, but also whenever the undesired insertion of double wefts occurs. This device comprises a plurality of transducers, each activated by a weft yarn, a logic network and means for stopping the loom, said logic network comprising means for storing a predetermined law of insertion of the individual weft yarns corresponding to a certain weaving operation on the loom, and for comparing with said law the actual weft insertions detected by the transducers.
Claims6
Electronic device for controlling weft yarn insertion in continuous weft feed looms, designed to stop the running of the loom and to provide a signal, whenever there is either breakage of a weft yarn or when a larger number of weft yarns than that scheduled, is inserted by mistake, characterized in that it comprises a plurality of transducers each activated by movement of a weft yarn and adapted to feed signals to a logic network when the yarn is in movement, there being a said transducer individual to each said weft yarn and means, downstream of said logic network, operated by the signals emitted by said network and adapted to activate a device for stopping the loom and providing a signal, said logic network comprising means for storing a predetermined law of insertion of the individual weft yarns corresponding to a certain weaving operation on the loom, and for comparing with said law the actual weft insertions detected by the transducers thereby to stop the loom not only when fewer than a predetermined number of weft yarns is inserted in the loom but also when more than said predetermined number of yarns is inserted in the loom.
Dependencies are inferred from the claim text.