US Patent 6,293,315 (granted 25 September 2001) assigned to Staubli Faverges, describing a process and device for positioning warp yarns on electronically controlled weaving looms, especially Jacquard looms. A detector common to many warp yarns (laser beam and cell, filiform sensor, or movable contact carriage) senses when a yarn reaches a set position, and the actuator control parameter at that moment is used as a control point. This replaces manual levelling of the harness. The scan includes a USPTO web database printout with claims and description, plus the printed patent with three sheets of drawings.