and stressed in fig1 the spring back of striker lever is represented by reference numeral 3 39 and is shown in dotted lines the projectiles 4 are brought into the launching position one after another with a pivotable projectile lever 7 projectiles 4 39 are moved from lever position 7 39 shown in dotted line to the front of striker piece 34 on striker lever 3 in the case of known projectile looms the return transport of the projectiles 4 39 to the projectile lever position 7 39 is effected for example by a conveyor chain not shown the launching of a projectile 4 and the turning motion of the striker lever 3 induced by torsion bar 2 are illustrated in fig2 two further positions are drawn in dotted lines at 3 39 and 3 34 and the position of reversal of the striker lever is at 3 39 34 the launching phase has practically concluded when the striker lever 3 has pivoted through the angle u03b1 while the striker lever 3 continues to pivot through the angle u03b2 to the position of reversal 3 39 34 during the stressing of the striker lever it is moved back again into its starting position 3 while between the starting position 3 and at least one part of the range of angle u03b1 an alignment member 5 influences the position of striker piece 34 in fig3 a striker piece 34 is supported by a bushing 35 39 pressed onto a pin 35 so that it can pivot on striker lever 3 and it has a t shaped flat striker face 33 which is widened in the launching direction in the illustrated embodiment striker face 33 is in.