Piezoelectrically controlled lift blade and hooking for a shed-forming device for a loom

A shed forming arrangement for a loom, comprising:

• lift elements movable in opposition relationship to each other;
• hooks adapted to be operatively associated with the lift elements;
• a connecting member connecting each two adjacent hooks to form a respective pair, each connecting member forming a loop;
• a roller carried in each loop;
• means connecting said roller to shedding means of the loom;
• arresting elements movable between an engagement position with the respective hook and a non-engagement position;
• and actuating devices adapted to influence the position of the respective arresting elements, each actuating device comprising a piezoelectric flexural transducer and means for stationarily clamping same at one end thereof to a stationary machine part, each piezoelectric flexural transducer being arranged so that its free end moves transversely to the path of movement of the associated arresting element between a blocking position of being disposed in the path of movement of the associated arresting element and a non-blocking position of being disposed outside the path of movement of the associated arresting element.