Electromagnet-striker bar system for a rotary dobby drive device

An electromagnet-striker bar system for the control device of a rotary dobby comprising a set of striker bars of ferrous material, each of the striker bars hinged at one end to a respective individual arm projecting from a single shaft which rocks the individual arms to provide a rocking motion for the striker bars, wherein the striker bars are each urged by a respective individual spring against a single accompanying arm which rotates the striker bars to thereby provide the striker bars with a movement perpendicular to said rocking motion, from a first position in which the striker bars are each in contact with a respective individual amagnetic support and slide shoulder and each of the striker bars cooperate with a respective individual electromagnet energizable in accordance with a predetermined program, to a second position in which the striker bars are each withdrawn from said electromagnets, and wherein iron cores support electrical windings of said electromagnets, with the iron cores equidistantly inserted into and irreversibly locked in an amagnetic container, the amagnetic container having an extremely rigid box structure comprising first and second sides, with the first side further from a hinging axis of said striker bars than said second side, and wherein said first side is provided with a longitudinal groove into which said amagnetic support and slide shoulders are inserted, the striker bars each having a respective free end, and wherein the free ends of the striker bars are hardened by a heat treatment.