Sewing machine differential feed

Abstract

Device for feeding the work in a differential-feed sewing machine, comprising a feed shaft (14) oscillating about its axis, a curved lever (32) connected on the one side to the said shaft (14) and on the other side to a small connecting rod (30) which is in turn hinged with the differential feed slide (27) and an element (38) for adjusting the feed in order to vary the amplitude of oscillation of the said small connecting rod (30), wherein there are provided means (34, 36) for locking and releasing the said lever (32) with respect to the feed shaft (14) and wherein the element (38) for adjusting the feed is free at one end (38') and at the other end is articulated with a pin (31) with which the said lever (32) and the said small connecting rod (30) are hinged so that the said lever (32), released from the shaft (14), is displaced by means of the said adjusting element (38), which makes it project more or less from the shaft (14), and is locked to the shaft (14) itself in the corresponding positions.

Dependencies are inferred from the claim text.