A device applicable to sewing machines to be able to form calados on a fabric and join one or more fabrics (Machine-translation by Google Translate, not legally binding)

摘要

A device applicable to sewing machines to be able to form drafts on a fabric and join one or more fabrics, essentially adjustable, as a whole, by its own frame and in stable form, to the column of the foot with which in said machines it is fixed the fabric, while its mechanism is driven by the needle holder of the machine itself; the mechanism of this accessory comprising, jointly and in combination, the following organs: a) a ratchet mechanism, which transforms the reciprocating vertical movement of the needle holder, into angular advances of an eccentric shaft; this mechanism being provided with a forward and a retaining ratchet, both adjustable; b) an eccentric organization integral with the ratchet wheel comprising three discs, with lateral eccentricities to form two circular guides to drive the stops of two flat and superposed levers and a fourth disc with radial eccentricity to act on the presser foot of the cloth; c) an organization, constituted by the flat levers, cited in (b), and a lower flat slide articulated by one of its ends to hinges with the rack plate that determines the evolutions of the fabric with respect to the needle, essentially consisting of a combination of the fixed axes of those levers and of stops and laces of the slide to transform the movements of one of the levers in swings of the rack, for the effective advancement of the fabric and those of the other lever in transverse swings of the rack to determine the lateral displacements of the fabric; d) a displaceable collision organization as a function of the radial eccentric cited in (b) to cause vertical reciprocating movements of a presser foot with which the fabric is fixed, consisting of a link of this foot by pins to the collisions of a displaceable plate that by a proper stop it receives the thrust of a tilting lever; being provided with a career grader for this foot, consisting of a cited satellite stop of the eccentric, and this organization being provided with its own adjustment system, consisting of a perforated sector located on the pivoting lever in any of its holes can be fixed a stop to regulate the stroke of the lever. (Machine-translation by Google Translate, not legally binding)