Device applicable to sewing machines to produce a circular movement of the same in the fabric (Machine-translation by Google Translate, not legally binding)

摘要

A device, applicable to sewing machines, to produce in the fabric movement of circular advance thereof and consisting essentially of a tooth plate provided with a curved window in which it slides following its profile, the piece that effects the dragging of the tissue, by means of the action of a pin or plate attached to the tooth support, normal spacing on sewing machines. (Machine-translation by Google Translate, not legally binding)