Abstract: Pressure damper for recoilless weapon designed to reduce the pressure in the area around and immediately to the rear of the muzzle of the barrel. A container with liquid is placed in the barrel close to its muzzle or in a forward extended portion of the barrel and arranged to be burst when the weapon is fired so that the liquid is suddenly released and mixed with the gases from the powder.

Abstract: A mortar carriage includes a holder (10) for a tube (19) and two angularly related legs (11, 12). The legs have adjustment devices (112, 122) for adjustment of the length.A sensor (13) senses the incline of site and the elevation of the tube (19) and controls the electric motors (111, 121) which drive the adjustment devices (112, 122).Control devices with a counting unit (20) controls the automatic adjustment of the length of the legs (11, 12) by coarse adjustment of incline of site and elevation respectively and after that fine adjustment of incline of site and elevation respectively. At the adjustments for incline of site the actuation of the legs (11, 12) happens in opposite directions and at the adjustment for elevation the actuation happens in the same directions.

Abstract: Increment charge for a finned projectile designed to surround a cartridge tube on the projectile and to be ignited by the ignition gases from a propellant and ignition cartridge included in the cartridge tube. The surface of the increment charge which faces the cartridge tube is enlarged in that it is provided with a number of recesses which provide access for the said ignition gases. The increment charge consists appropriately of a number of powder discs of horseshoe-shape, provided with holes, the inner edge of which is asymmetric relative to the aperture of the horeshoe-shape. Each alternate disc is inverted so that the shape of the hole edge is inverted in mirror fashion for each alternate disc.

Abstract: An arrangement of tubular exchangers located in a lake for anchorage of the heat exchanger to the bottom of the lake. A number of the colder portions of the inlet side of a circulating heat exchanger medium of the heat exchangers are connected to heat pipes frozen in the bottom of a lake. The heat pipes, sealed at both ends, as a result of heat transfer from the bottom of the lake become frozen in position and anchor the tubular heat exchangers to the lake bottom.

Abstract: Arrangement in a fuse for projectiles with explosive charge for changing over between direct and delayed ignition of the explosive charge. The arrangement includes a movable contact member which in an initial position short-circuits an electrical igniter which is designed for direct ignition of the explosive charge. A locking member in the form of a pin in an initial orientation of the projectile takes up a position in which the contact member can move under the influence of the accelerational forces effective on the projectile to a second position where the contact member is held by a detent device. With a second orientation of the projectile the pin, as a result of its own weight, drops down to a position where it prevents the contact member moving from the said initial position.

Abstract: Arrangement for a land mine which is provided with at least one magnetic field sensing device which is arranged to initiate detonation of the mine when a change in the magnetic field is sensed. A magnetic body is laid out loosely underneath the mine so that when the mine is raised from the ground this results in the mine being removed from the magnetic body, so that a change in the magnetic field which initiates detonation of the mine is sensed by the magnetic field sensing device.

Abstract: Arrangement for a terminally guided projectile provided with a target seeking arrangement and path correction arrangement. The arrangement includes a preferably fin-stabilized, slowly-rotating artillery shell which is provided with an elongated cavity into which the terminally guided projectile, which comprises a fin-stabilized mortar projectile, is introduced. The mortar projectile is arranged so that it is ejected rearwards from the artillery shell by means of a separation charge in the vicinity of a selected target, after which the mortar projectile is terminally guided towards the target in a manner known per se.

Abstract: Arrangement for cabinet with a door which can be opened at either of two opposing edges. At each of the opposing edges the door is hingedly connected with a side flap which when opened permits access to material stored in the cabinet. Each side flap is capable of being locked to the cabinet by means of two locking devices. When an arbitrary pair of locking devices is unlocked the door together with one side flap can be swung outwards from the cabinet.

Abstract: A mandrel for the production of internally profiled, specially threaded tubes or cylinders (2) by the cold forging of tube shaped forging blank (2) around a profiled mandrel (3) by cold forging the workpiece (2) from its one end to the opposite end. The threaded mandrel is parted at or near its axial center and both halves (3a, 3b) are held together axially free under a given radial play. Both ends (8, 13) of the mandrel halves are shaped for the application of a spanner. The mandrel halves can be shaped slightly conical from the ends in towards the parting line, and the flanks of the mandrel threads (14, 15) can be ground so that the threads thicken slightly and continously from the parting line and outwardly towards the mandrel's ends. The thread depth in the mandrel can be slightly deeper than the required thread height on the cold forged tube or product.

Abstract: A mandrel for the production of internally threaded tubes or cylinders by the cold forging of a forging blank (3) around an externally threaded mandrel (2). The mandrel is formed with a conicity of 0.2-1.0% or preferably 0.4-0.7% and the flanks of the mandrel's threads can be ground so that the thread width is least at the mandrel's narrow end. The reduction of flank width can be 0.1-0.4% of preferably 0.2-0.3% for a length unit of the mandrel with the above named conicity. Preferably even the inner diameter of the mandrel's thread is made 0-0.5% less than the required inside diameter in the tube's or cylinder's thread.

Abstract: A method and tool for cold forging or cold hammering of internally profiled tubes, whereby a forging blank (2) is while rotated, forged by the action of a number of forging hammers (4), whereby the workpiece (2) as a result of material displacement is formed around a profiling mandrel (3). Before cold forging, the mandrel (3) is adjusted with its axial center (c--c) to a position axially to the side of the forging blank's (2) axial center (c'--c') at a distance equal to half the rolled billets extension during cold forging, and in the direction away from the forging hammers' start position. The apparatus comprises an end socket (5) and a driver (10) between which both the workpiece (2) and mandrel (3) are arranged to be clamped.

Abstract: In order to prevent a conduit for heat absorption from a sea bottom or the like to float up in wintertime from the bottom due to icing, it is proposed according to the invention that the flow cross-section of the conduit is heat insulated from the surrounding water. Such insulation is obtained according to one embodiment of the invention, in that a work fluid is imparted with a laminar flow in the upper cross-section (15) of the conduit by means of a constricting inner pipe (12) located upwardly in the conduit, while the work fluid in the remaining cross-section (16) is permitted to have a turbulent flow.

Abstract: This invention relates to a method and system for distinguishing between displacing targets and a surface of water by transmitting pulses from a transmitter that is submerged in the water, the pulses being reflected and received by a receiver, also submerged in the water. The variations in the distance to the reflecting surface for consecutive pulses are measured and compared with a first value, determined inter alia from the state of the sea, and with another value, determined from the size of the target.

Abstract: Method and apparatus for adjusting roller rings (5) on a roller (4) in exact positions in the peripheral and the axial directions in relation to each other and in relation to the roller (4), and in which the apparatus comprises a parallelogram means (11) which is movable parallelly to the rotatable roller (4) and which comprises an adjustment head (14) having a guide pin (18) adapted to co-operate with the corresponding guide bore (17) in each roller ring, and in which the parallelogram means (11) is supported by a support body (15) which is fixed mounted in relation to the rotatable roller (4) and which comprises both a drive mechanism (14) for positively moving the parallelogram means (11) and a locking means (19) for locking the parallelogram means in an adjusted position and a gauge apparatus (16) for exactly gauging the movements of the parallelogram means (11).

Abstract: A method and an apparatus for cleaning a continuous web of material (1), for instance a paper web, whereby the web of material is brought to pass through a suction chamber (2) having inlet (12) and outlet (13) for the web of material and one or more air outlets (11), for instance at the bottom thereof, which outlets are connected to a suction source. A means (4) for working the web of material (1) may be provided inside the suction chamber. The inlet (12) and the outlet (13) have substantially the same cross-section area. The amount of air entering the suction chamber through the web inlet (12) is restricted to cause a greater amount of air to flow into the suction chamber through the web outlet (13) than flows into the suction chamber through the web inlet (12).

Abstract: Projectile with at least one expellable subprojectile. The projectile is provided with a nose element, which is arranged, in a predetermined position in the trajectory of the projectile, to be discarded, thereby causing a decelerating force on the projectile. The fore subprojectile is provided with a deceleration-sensing device, which is capable of initiating the expelling of the subprojectile as a consequence of sensing said deceleration force. The subprojectiles in behind are arranged to be expelled either as a consequence of sensing deceleration forces occurring on expelling of the subprojectile immediately in front of it, or alternatively to be expelled in a conventional way with a delay relative to one another achieved through pyrotechnic delay.

Abstract: A subprojectile to be expelled from a projectile. The subprojectile is provided with a fuze, which has an ignition body being capable of sensing acceleration forces appearing at the expelling of the subprojectile from the projectile, and being capable of sensing deceleration forces appearing after the expelling of the subprojectile from the projectile. The ignition body is arranged to bring arming means into an armed position in response to said sensing of acceleration forces. The ignition body is capable of initiating a detonation of a bursting charge in the projectile as a result of said sensing of deceleration forces when the arming means is brought to the armed position.

Abstract: An assembly comprising an inner and an outer cylindrical members, the inner member being displaceable within the outer member and provided with an annular recess, a locking ring being housed in the recess to allow displacement of the inner member in a first direction but locking the members relative one another upon attempt to displace the inner member in a second direction.

Abstract: This invention relates to a propelling charge comprising several rectangular powder strips for a recoilless weapon or a rocket and a method to produce the charge. The strips are piled on each other and joined with one or more threads at one side of the pile and the pile is bent to a tubular shape, at which the edges of the strips that are joined to each other generate the inner side of the tube.An even ignition and combustion of the powder is achieved with the suggested powder strip arrangement.

Abstract: A burner pumps fuel through a fuel line and pumps air into a chamber. Air from the chamber and fuel from the fuel line enter a mixing chamber. The fuel and air mixture flow through an evaporator tube which extends into a combustion chamber and turns at two successive 90.degree. angles and releases the mixture in an opening facing the bottom of the chamber. Combustion air flows through the air chamber outward parallel to the combustion chamber walls in a labyrinth and then into an expansion chamber through air slots and past flow directing wings which give the combustion air a screw direction. Exhaust gas flows outward around the outer walls of the labyrinth. The evaporator tube has an outer area to inner volume ratio of 0.3 to 0.8.