Abstract: An apparatus for the section-wise autofrettage of gun barrels (22) by a hydraulic pressure generated inside the barrel. The apparatus (1, 1?, 1?) comprises a mandrel-shaped insert (2, 2?, 2?) inserted into the barrel (22) from the breech opening. A first sealing device (3) is disposed at one end of the insert (2, 2?, 2?), and has a seal packet (5) disposed on a seal seat (4) of the insert (2, 2?, 2?). The seal seat (4) is limited at the front by a threaded sleeve (7) screwed onto the insert (2, 2?, 2?), and an annular intermediate part (8) adjoining the threaded sleeve (7) at the rear. The seal packet (5) includes at least one O-ring (10) held by a shoulder (9) of the mandrel-shaped insert (2, 2?, 2?), and a high-pressure seal (15) formed by two partial rings (13, 14) that are connected to one another by a conical contact surface (16).

Abstract: A gun barrel having a muzzle brake (2), especially for large-caliber guns, in which the muzzle brake (2) includes a tubular piece that has openings (16) around its circumference, and a jacket tube (4), which surrounds the tubular piece and has diametrically opposite gas-exit openings (17) that extend perpendicular to the bore longitudinal axis (15). To provide an arrangement comprising a barrel (1) and a muzzle brake (2) that minimizes the firing stresses on the parts of the muzzle brake (2) that are detachably connected to the barrel (1), the muzzle region (3) of the barrel (1) itself is used as a component of the muzzle brake (2. That is, the muzzle region of the barrel is provided with a plurality of openings (16) arranged in ring formation around the barrel (1), and the attached the jacket tube (4) is provided with slot-shaped gas-exit openings (17) over this muzzle region (3).

Abstract: A weapon having a barrel (3) supported in a cradle (2) for axial recoil movement, and having a breech block wedge (7) displaceable, transversely to the barrel axis (6) by a control unit (11) connected to the cradle and acting on a piston rod (8). The control unit (11) includes a spring-loaded shift rod (13) aligned with the piston rod (8), a spring-loaded control rod (15) aligned with a control cam (10) secured to the breech ring (4), and a detent pawl (17) that can be pivoted by a cam (16) from a blocking to a release position. The piston and shift rods (8, 13) are disposed such that during forward motion of the barrel (3), the breech block wedge (7) is already opened by axial displacement of the rods (8, 13) before the control cam (10) displaces the control rod (15).

Abstract: A gun having a wedge-type breech block and a barrel seated in a cradle for firing electrically-ignitable cartridges containing electronic components, and an ignition contact (4) for connection to an external current source, and a signal contact (5) for connecting the electronic components to an external electronic control device are disposed on the cartridge base (3). To ensure reliable ignition of the cartridge, and transmission of data from the cartridge, an axially displaceable ignition and signal-transmission unit (8) is provided in the breech block, and includes a housing (11) having two parallel, axial guides (12, 13), and two spring-loaded, needle-shaped contact devices (16, 17) arranged to be displaced inside the respective guides such that, in the extended position of the unit (8), the first contact device (16) is pressed against the cartridge ignition contact (4) and the second contact device (17) is pressed against the cartridge signal contact (5).

Abstract: A pipe-shaped protective cover for a gun barrel mounted over at least a portion of the outer periphery of the gun barrel. The protective cover includes a first-insulating layer joined to the outer surface of the gun barrel; a second heat-conducting layer mounted on said first layer; and at least one additional heat-insulating layer followed by at least one additional heat conducting layer which are mounted in that order on the second aforementioned layer. The invention envisages a firm mounting of the protective cover on the gun barrel without the formation of intermediate air gaps between the cover and the gun barrel.