US Patent 4,416,310, granted 22 November 1983 to Paul Sage of Lyons, France (assignee Verdol S.A.), for a double-lift Jacquard shed-opening mechanism. Resilient metal blades attached to the heddles pass through two reciprocating plates. Electromagnets controlled by a pattern selecting device (perforated paper or magnetic band) deflect the blades so that each heddle is raised or lowered. The design is aimed at weaving fine, high-density fancy fabrics such as silk, and it is modular so units can be removed for lower warp densities. The scan includes a USPTO database printout with abstract, claims and description, plus the printed patent with five sheets of drawings (Figs. 1-12).