Rule perfected. (Machine-translation by Google Translate, not legally binding)

摘要

Rule improved that being specially designed for the layout of parallel lines and optional layout perpendiculars to previous essentially characterized by being constituted by means of an elongated body, hollow and open to its support base within which and positions extremely establishing supports sendos rubber rollers mounted on shafts which in turn are fitted with freedom of turning over said supports, so such rollers rubber resulting coax, are dimensionally identical and slightly protruding from the plane body support on the surface of the drawing figures also in absolutely coinciding. (Machine-translation by Google Translate, not legally binding)