Needle positioning device for sewing machines

摘要

A device for locating the needle of a sewing machine in a preselected position upon completion of a sewing operation. The device includes a control shaft operatively connected to the needle and by driving elements, to a clutch brake type operating motor. A cylindrical member having a reference pin extending radially from its periphery is fixed on the control shaft and is operatively connected to an auxiliary actuator which when the machine is stopped is caused by a control apparatus to rotate the cylindrical member and its reference pin. The control apparatus is also effective in moving a stud into the pathway of the reference pin and when the two engage one another, the cylindrical member and control shaft are stopped which positions the needle in a preselected position.