SEWING MACHINE WITH A SHIFTABLE THREAD GUIDE

摘要

A thread take-up lever is reciprocable in vertical direction and receives thread from a thread tensioning device. Intermediate the take-up lever and the tensioning device the thread is supplied to a thread guide which is displaceable in parallelism with the movement of the take-up lever between an upper and a lower position. A dial is movable to at least two positions and is connected with the thread guide by linkage means so that the thread guide moves between its upper and lower positions in dependence upon the movement of the dial to the respective positions of the latter. Depending upon whether the thread guide is in its upper or lower position the amount of thread supplied to the take-up lever is varied, that is it is either increased or decreased.