Abstract: The invention relates to a general method of producing progressively burning deterrent-coated powder, more particularly propellant powder for weapons having barrels. According to the method a film-forming, preferably polymerizable deterrent substance is fed to the powder loosely or dispersed in a liquid phase which is thereafter driven off. The invention also relates to a method of giving a deterrent coating to granular powder or powder cut up in to short pieces (so-called tubular powder) in a fluidized bed. Finally, the invention relates to a special deterrent substance in the form of a water-dispersable polyurethane built up on an aliphatic isocyanate and a caprolacton polyester.

Abstract: An ignition device comprising a lower housing (1) in which a sleeve (2) is mounted containing the main charge (10) of the ignition device. The ignition device utilizes an electric igniter device (15) which includes an insulating body (19), an electric pole device (20) and at least one electrically connecting element applied on one end surface (19a) of the insulating body for connecting the electric pole device (20) and the electric ignition device housing (21). The electric ignition device makes contact via the said end surface (19a), against the layers (16) and (17) of pyrotechnical charges included in the ignition chain for the main charge (10). The said electric ignition device and layers of pyrotechnical charges are located inside a ring-shaped device (12) from the first end of which the electric pole device (20) protrudes. The ring-shaped device extends into the recesses (1a) and (9e) in the lower housing (1) and the sealing part as well as across the space (13) between these parts.

Abstract: An armored hatch cover for a combat vehicle which covers the hatch opening in the vehicle turret is pivotally mounted between an open position which provides essentially circumferential direct observation from the hatch and a closed position in which the cover seats upon a margin in the turret, sealing the hatch opening. In the open position the cover protects the hatch opening and forms a small annular gap between the lower part of the cover and the margin to allow circumferential observation. The cover has a downwardly extending front part which provides additional front armor protection when in a closed position.

Abstract: A shell case comprising prefabricated fragments (4), preferably of a material with high density, and a supporting material which surrounds the fragments and together with these forms a connected shell which surrounds the explosive of the shell. The supporting material consists of a completely dense non-compressible material which is permanently connected with the pre-fabricated fragments, for instance a hardenable steel. The shell is preferably manufactured by a powder metallurgical procedure in which the supporting material in the form of a metal powder together with the pre-fabricated fragments (4) are pressed under high all-round pressure and high temperature into a dense compact jacket.

Abstract: The present invention relates to a method for the recrystallization of the high explosives HMX and RDX. According to the invention, the explosive is dissolved in a low molecular weight, liquid (at room temperature) lactone, after which the degree of saturation of the solution obtained, is changed by either lowering the temperature or by diluting with water.This method produces, depending on the crystallization method chosen, .beta.-HMX crystals or RDX crystals of either 50-1500 .mu.m or 5-50 .mu.m median particle diameter respectively.

Abstract: This invention relates to a blasting chamber; i.e. a cylindrical container or chamber (1, 2) which can contain high pressure and splinters produced by an explosion. The blasting chamber according to the invention is characterized of its low weight, which has been achieved by an at least partial double wall design with an interior part (1) which is locked up in an exterior part (2) in such a way that any increase of pressure working on the interior part is divided between primarly the jacket wall of the interior part, secondly the end walls (4, 5) thereof and thirdly the jacket wall (12) of the exterior part.

Abstract: The present invention relates to a readily replaceable liner for a detonation chamber (1) intended to protect the inside of the chamber from damage when the detonation chamber is used for test firings of fragment-producing charges. The liner consists of a plurality of readily replaceable parts or sections of a few types. In the case of cylindrical detonation chambers (1), use is made primarily for protection of the mantle wall of the chamber of rectangular plates or cassettes (20) slightly cupped in one direction, which are held together by a special fitting (29) to mantle rings covering the inside of the detonation chamber wall (10). The joint between the various parts of the liner is such that a small amount of play or rattle exists between the parts. By this means, the liner is prevented from commencing to vibrate in phase with the chamber wall (10). The fundamental idea behind the invention is a readily replaceable liner capable of receiving fragments and in which only damaged parts need to be replaced.

Abstract: The invention relates to a general method of producing progressively burning deterrent-coated powder, more particularly propellant powder for weapons having barrels. According to the method a film-forming, preferably polymerizable deterrent substance is fed to the powder loosely or dispersed in a liquid phase which is thereafter driven off. The invention also relates to a method of giving a deterrent coating to granular powder or powder cut up in to short pieces (so-called tubular powder) in a fluidized bed. Finally, the invention relates to a special deterrent substance in the form of a water-dispersable polyurethane built up on an aliphatic isocyanate and a caprolacton polyester.

Abstract: An explosive shell case of the kind in which fragments are produced by bursting of the case material into a number of small particles. The case material comprises a completely dense, non-compressible material which is made with embrittling zones (4) which when the shell bursts gives fragments of a predetermined shape. The case is preferably manufactured powder-metallurgically, the embrittling zones then being formed by filling at predetermined intervals with powder with the embrittling component. The case is then pressed under high all-round pressure and high temperature into a dense, compact jacket and is imparted its final properties through heat treatment.

Abstract: Fluid damper for damping aiming movements, for instance when tracking a target. The damper comprises a substantially disc-shaped cylindrical housing (9) in which a drum-wheel (11) is supported for rotation so that an inner gap spacing (24) is provided between the drum-wheel and a slipping ring (14) integrated in the outer cylindrical wall (13) of the damper housing. Said gap spacing (24) is filled with a high-viscosity damping fluid so that a damping torque is obtained which is linearly increasing to the angular velocity for velocities up to a certain level but which are limited for velocities exceeding said level due to the fact that the slipping ring (14) starts rotating with respect to the other parts of the damper housing. The slipping ring (14) is made of a material which is temperature stable and which can be made with a high accuracy with respect to its dimensions for instance carbon-fibre reinforced epoxy resin.

Abstract: The invention relates to a load cell based on the shear force principle comprising a measuring body in the form of a beam (1) supported on its outer end regions (2, 3) and loaded at its center region. The beam is provided with strain gages (10, 11, 12 and 13) mounted in intermediate zones between said end and center regions so as to be affected by deformations in the beam material due to bending of the beam (1) caused by a loading force (F). In order to make the load cell insensitive for unfavorable forces which arise due to thermal expansions or the like each of the outer end portions (2, 3) of the measuring body comprises a built-in ring shaped bearing (22,23,24,25,26). This means that the need for additional mounting details required for mounting the load cells has been eliminated. The load could be applied directly to the center region of the measuring body via a simple load coupling means (6).

Abstract: The invention relates to a drive element (1) for a sub-calibre spinning projectile (2). The drive element (1) comprises an annular sabot member (17) applied on the rear part of the projectile (2) and a guiding sleeve (7) of full-calibre substantially embracing the projectile (2) as well as the sabot member (17). The guiding sleeve (7) is provided with an external driving band (9) made directly in the sleeve material and internal threads coacting with corresponding threads (18) of the sabot member (17). The front part of the sabot member is provided with a central, axial hollow (20) for the rear part of the projectile comprising a plurality of axially extending locking pins (22) arranged to engage corresponding recesses (6) made in the outer cylindrical surface of the projectile close to its rear end surface (5) to secure the projectile (2) to the sabot member (17). The guiding sleeve is made of a high-strength material of low density, preferably a glass-fibre reinforced polyamide.

Abstract: This invention relates to a mounting socket for inductive proximity switches (1) of the type which comprises a number of guide pins (2) for cooperation with the socket when mounting and dismounting the proximity switch in the socket. The mounting socket comprises an inner, cylindric guide surface (10) corresponding to the body of the switch and this surface is provided with a number of guide slots (8), substantially in the longitudinal direction of the socket, for the guide pins (2) of the switch. The mounting socket also comprises a number of spring elements (16, 17, 18) which are arranged to cooperate with the guide pins (2) for locking the proximity switch at a very precisely defined position with respect to the sensed element (28). The spring elements (16, 17, 18) are formed by means of slots (19, 20, 21) having a substantially peripheral extension in a cylindric part (12) of an inner sleeve (5) seated in the housing.

Abstract: A method and a device for the purpose of de-icing those covers and other surfaces of limited size which can be subjected to severe icing and which it may be necessary to make ice-free at very short notice. Examples of the types of surfaces intended are protective doors for ship-borne missiles and torpedo tubes, emergency exit doors, and helicopter landing platforms etc. These surfaces are de-iced by an interior igniting primed tubular power charge which in the case of doors is placed directly in a groove along edges which the door seals against the surrounding door frame or another mating door, and in the case of other types of surfaces is placed in accordance with a pattern intended for that particular surface. The tubular powder charge is placed in an open groove in the relevant surface which faces in the same direction as it is desired that the ice should be flaked loose.

Abstract: The invention relates to bearing means for a gun barrel (3) mounted in the breech casing of a weapon in which the breech casing comprises a sleeve member (2) enclosing a rear part of the gun barrel (3). The bearing means comprises a cylindrical sleeve (10) positioned between said breech casing sleeve member (2) and the adjoining external gun barrel surface. The sleeve (10) is provided with a spring part which consists of a plurality of finger springs (17) distributed about the peripheral surface of the gun barrel and engaging by the force of spring an enlarged cylindrical part (7) of the external gun barrel surface. This enlarged, cylindrical part (7) has such a length (d) in the longitudinal direction of the gun barrel that the finger springs (17) are engaged to said part (7) during the first phase of the recoil during which the shell, projectile or the like has not yet left the bore of the barrel (3).

Abstract: This invention relates to a hollow charge for a missile, projectile, shell or the like. The invention is particularly intended to be used on a missile which is arranged to pass a target and the hollow charge initiated when the missile is over, at the side of or under the target which means that the hollow charge is inclined with respect to the longitudinal axis (13) of the missile. The hollow charge comprises an inner, jet-forming, trumpet-shaped cone member (3) and an outer casing (2) having a substantially straight cylindrical part (8) connected to a conical tapered part (9, 10) to give the hollow charge jet an extremely high front tip velocity as well as a low velocity gradient.

Abstract: The present invention relates to means for reducing the gun firing dispersion in a weapon system. The gun (4) comprises a gun servo for aiming the gun at a target. A programmable signal generator (5) is arranged to produce a damping signal (z) which is supplied to the gun servo system at the firing of the gun and which signal has such a character that the oscillating movements which are generated at the firing of the gun are counteracted. A recoil sensor (6) is provided for sensing the start of the recoil movements of the gun and emitting a trigging pulse to the signal generator (5) which in turn is producing said damping signal (z) preferably in the form of a pulse train in which the number of pulses, the pulse widths, polarities and amplitudes of individual pulses can be varied and which has a certain time relationship with the gun firing moment.

Abstract: The invention deals with a spherical or almost spherical chamber or container 1 which can seal in pressure and splinters produced by explosion, deflagration or detonation of explosive substances. The chamber is constructed with an outer structural shell 2, an inner splinter protection layer 3 and an intermediate shock absorbant layer 4. Openings cut in the chamber wall are provided with equally strong outlets or are sealed with equally strong doors constructed after the same principles as the chamber.