WEFT THREAD MONITORING SYSTEM IN A CIRCULAR LOOM

摘要

In a system for monitoring the weft threads (32) in a circular loom where said weft threads are wound off the spool (31) of the shuttle (30) running in the shed along a circular track formed by the reed (3) and taken off to the edge (13) of the tubular fabric produced, scanning means monitor the weft thread and generate an electric regulating signal on detecting a fault therein. Here, the electric regulating signal (23) can be generated by a magnetic sensor (22) in the region of the track of the shuttle (30) co-operating with a permanent magnet (24) carried on the shuttle (30). The permanent magnet is arranged on a pivoted lever (26) deflected by the weft thread (32) drawn off against the action of spring-like return means (25) and held outside the effective connection with the magnetic sensor in order to take up its end position producing an effective connection between the permanent magnet and the magnetic sensor to generate an active regulating signal (23) in the event of a fault in the weft thread.