The invention relates to a device for detecting foreign substances in a thread using a detector which line-scans the thread, the latter being lit by an illumination element. The wideband signal can then be intensity modulated on a laser and coupled to a fiber optic channel. , module for TBC features, image compression recordingplayback features, and LCD displaying features, it would be desirable that the time base fluctuations of the video input signal is faithfully reflected and that an interpolated HD generating feature is provided. The power of filtered sub-beam is compared to the power of the unfiltered sub-beam to provide a ratio, which is compared to one or more predetermined values indicative of the bit rate. A second requester node requests a lock for a particular resource in the group of resources. The dynamic damper has a horizontal frame and a vertical frame disposed at both sides of the horizontal frame in such a way that the horizontal frame and the vertical frame continuous with the horizontal frame in the shape of a lattice.