Abstract: An arrangement and a method are provided for upgrading/downgrading and maintenance (fitting, removal, selection, or repair) of a needle board (1) of a needle machine for nonwoven or needle felt production. The arrangement has at least one tool (2) and has a holding device (3) for holding the needle board (1). The tool (2) may be positioned relative to a needle bore (4) and/or a needle (5) of the needle board (1) by means of a control and drive device and at least one detection device. The arrangement increases the flexibility of the positioning of the tool and allows operations such as selection, repair of the needles by virtue of the tool (2) and the control and drive device being assigned at least one robot (7, 8). The robot (7, 8) is provided with at least one articulatedly mounted tool arm (9, 10) on which the tool (2) is arranged.

Abstract: An automatic gun for firing telescoped cylindrical ammunition, the gun comprising a sleeve for supporting a barrel, a breech, and a rear box which are all rigidly connected together by beams, the gun including a chamber disposed between the breech and the barrel and mounted to swing by pivoting about an eccentric shaft, and further including means carried by the breech and the rear box to feed ammunition to the chamber.

Abstract: A striker device for striking a firearm cartridge, the cartridge comprising a case provided with a cap and the firearm including a bolt having a front face that is normally intended to be pressed against the cartridge case, a striking pin guided to move in translation in the bolt and including a tip for striking the cap of the cartridge, means for displacing the striking pin between a cocked position in which the striking pin is retracted into the bolt and a firing position in which the tip of the striking pin projects from the front face of the bolt to strike the cap of the cartridge, means for taking up clearance between the front face of the bolt and the cartridge, said means comprising a part having the striking pin passing axially therethrough and itself displaceable in translation relative to the bolt to occupy a firing position in which its front end projects from the front face of the bolt and bears against the cartridge case, the extent to which the tip of the firing pin projects relative to the fron