| 摘要 |
In a monitoring device used for the weft thread of a weaving machine, which comprises at least one insertion element having a thread clip movable to a thread-release position, and comprising a weft thread detector, which is used for monitoring the movement of the weft thread and which, during each insertion, is activated only for an observation interval ending at least approximately with the release of the inserted weft thread by the thread clip, an electric sensor (S) is provided in an opening device (B) arranged in the weaving machine and used for opening the thread clip (G) of the insertion element, said sensor (S) responding to the release position of the thread clip with a signal (i) representative of the end of the observation interval.
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