Abstract: Upon rupture of a thread or the like a thread monitor or stop motion moves about a pivot point in clockwise direction, and thus, by means of a release rod, causes an entrainment element to come into engagement with a to-and-fro driven entrainment member. Consequently, an actuation rod is upwardly moved and latched by a support lever in its upper position. Due to this movement a feed bobbin along with the therewith operatively correlated thread guides are lifted, so that the thread travel path is shifted out of the effective region of a singeing burner. Due to the raising of the feed bobbin there is diminished the spacing between such feed bobbin and a winding bobbin. Due to lifting of the actuation rod the winding bobbin, in response to the operation of a pawl and a tooth segment, is raised from a driving cam or grooved drum. The raised position of the feed bobbin facilitates the knotting of the thread.