Structure of special form of continuous bar of iron, steel or other metals applicable to the manufacture of springs (Machine-translation by Google Translate, not legally binding)

摘要

A STRUCTURE OF SPECIAL FORM, OF CONTINUOUS BAR. OF IRON, STEEL OR OTHER METALS, APPLICABLE TO THE MANUFACTURE OF FURNITURE, which is characterized by being constituted by a sinuous line, continuous and closed on itself, contained in a succession of vertical or almost vertical planes. (Machine-translation by Google Translate, not legally binding)