Abstract: A primary ignition system for large caliber ammunition which ignition system is less sensitive to unwanted ignition by conventional temperatures or conventional electrical signals or by stray electrostatic voltage electrical signals, or stray RF frequency signals. This ignition primer device begins the ignition sequence with applying a high voltage electrical pulse to a non-energetic element, specially coated with nano sized aluminum particles, to release and ionized discharge that generate a plasma in order to ignite an environmentally friendly ignition composition mix. The ignition composition is also comprised of aluminum water based nano material combined with oxidizer and binder. In the device's primer head assembly is a brass ignition pin pressed into a (non-electrically conductive) Torlon® material cup. The non-conductive Torlon® material acts as an insulator for the entire system.

Abstract: Temporary connection and pyrotechnic separation device with a longitudinal axis (X) comprising a pyrotechnic expansion tube (14) mounted in a space (11) formed in a connection zone between a first (2) and second assembly (4) to be separated, the second assembly (4) being formed of a stack of plies (12.1, 12.2) bonded together, the two assemblies (2, 4) being connected to each other by two metal parts (10.1, 10.2), said metal parts being fixed onto the first assembly and bonded onto the outer plies (12.1) of the second assembly (4), the bonding area between said outer ply (12.1) and the adjacent inner ply (12.2) is less than the bonding area between two inner plies (12.2) forming a fuse ply, such that, when the pyrotechnic expansion tube (14) is used, the outer ply (12.1) separates from the adjacent inner ply.

Abstract: The invention relates to a method of, in the electrical ignition of a propellent charge (1) provided with an electrically conductive surface coating (5) and comprising one or more propellant components (3), ensuring that ignition and progressive combustion of the propellent charge take place. The method is characterized in that said electrically conductive surface coating, when ignition of the propellent charge is desired, is connected to an electrical high-voltage source (6), in that said high-voltage source is made to generate at least one high electrical pulse to said connected electrically conductive surface coating, and in that said at least one high electrical pulse produces an instantaneous flashover ignition of the electrically conductive surface coating of the propellent charge and of all its propellant components, simultaneously. The invention also relates to a propellent charge and to an ammunition shot comprising the propellent charge.

Abstract: The invention relates to an identifiable bullet and methods for making an identifiable bullet. In one embodiment, the bullet has a generally circumferential body that tapers from a rearward end toward a forward end. A generally circumferential bore extends from an orifice on the forward end into the body at least part of the way between the forward end and the rearward end. The end of the bore opposite the orifice includes a polymeric material support surface. A polymeric material is placed between the polymeric material support surface and the forward end. The polymeric material may include a user identifiable marker for allowing a user to identify the bullet when viewing the forward end. Alternatively, the polymeric material may cover a user identifiable marker and seal the user identifiable marker in the bore. A user may identify the bullet by viewing the marker from the forward end of the bullet.

Abstract: A method is provided for producing a large-calibre explosive projectile having a projectile casing with an ogival front part, which surrounds an internal area filled with a plastic-bonded explosive charge and, at a nose end, has a mouth closed by a nose fuze, wherein an elastic liner is arranged between the explosive charge and the inner wall of the projectile casing. The projectile casing is produced in two parts, such that, in the direction of the longitudinal axis of the projectile casing, a tail-end projectile casing section and an annular front projectile casing section, which contains the mouth, can be connected to one another in the area of the ogival front part, via a screw connection. The liner is introduced into the tail-end projectile casing section and the explosive charge is introduced into the liner before the two projectile casing sections are connected to one another.

Abstract: An radio frequency (RF) safe, high standoff voltage, ESD protected primary explosive detonator is described. The primary explosive detonator includes an isolated spark gap (SG) circuit and one or more shunt capacitors to insulate the electric match from ignition when exposure to high stray voltage or RF occurs in oilfield applications.

Abstract: A bearing system for a spin-stabilized projectile including bearing configurations that permit selective relative rotation between a spindle and a body portion and which facilitate automatic centering of the spindle. Each bearing configuration includes a conical bearing surface rotatable with respect to a corresponding conical body surface. One bearing configuration is in a forward portion of the body portion and selectively engages a first body surface upon the projectile experiencing set-back forces to direct forces away from bearing elements, and another bearing configuration is in a rearward portion of the body portion and engages a second body surface upon the projectile experiencing set-forward forces to direct forces away from the bearing elements.

Abstract: The invention relates to an ammunition comprising an explosive charge confined in a compartment and a deconfinement device capable of deconfining the explosive charge under a pressure or temperature rise within the ammunition. The invention neutralizes the ammunition on command. According to the invention, the ammunition further includes means for activating the deconfinement device, these means being controllable.

Abstract: The decomposition of a projectile in a target body, particularly a hunting projectile in wild animals after penetration therein, determines the energy output of the projectile and thereby the effect of the shot. For projectiles with double cores, the properties of the ingredients used in the cores decisively affect the decomposition and particularly the deformation behavior of the cores. According to the invention, a partial decomposition projectile comprising two cores is provided with one solid core (3) made of a material suited to said projectile and the other core (4;22) is divided up into two areas (4a,4b;22a;22b), whereby one area (4a;22a) is made of ball-shaped elements made of a metal material granulate (5;23) and the second area (4b;22b) is made of a metal or ceramic powder and the ball-shaped elements or granulates (5;23) are pressed to become free of shrink holes, in order to improve decomposition behavior control.

Abstract: A gas generator includes a housing body for housing a gas generating charge, a squib for igniting the gas generating charge and a holder section that holds the squib. The holder section includes a holder body made of metal and a molded section that is molded from synthetic resin and located between the holder body and the squib. The squib and the holder body are integrally molded with the molded section at molding of the molded section. The holder section includes a support section that protrudes inwardly to support an igniter of the squib. The support section is covered by the molded section all over the outer surface and has such a sectional contour as to taper toward the leading end as taken along an axial direction of the housing body.

Abstract: An ordnance firing system is disclosed that includes a reusable electronics module and an ordnance module, each enclosed in a separate, sealed housing. The electronics module housing encloses firing electronics for electrically triggering initiation of a detonator in the ordnance module. The electronics module detachably connects to the ordnance modules via a connector which extends away from the electronics module housing. The housing of the ordnance module is constructed to be blast-resistant to prevent detonation of the detonator from rendering the electronics module inoperable.

Abstract: A switch device having a base, a first electrically conductive pad coupled to the base, a second electrically conductive pad coupled to the base, a first electrically conductive projection and a second electrically conductive projection. The second electrically conductive pad is spaced apart from the first electrically conductive pad by a first predetermined distance. The first electrically conductive projection is coupled to the first electrically conductive pad and extends into the first gap. The second electrically conductive projection is coupled to the second electrically conductive pad and extends into the first gap. The second electrically conductive projection is spaced apart from the first electrically conductive projection by a second predetermined distance. The first and second electrically conductive projections form an electrical interface.

Abstract: A gas generator for a restraining apparatus includes a housing, an inner tube member within the housing, an ignition device on a bottom portion of the housing within the inner tube member, a solid gas generating agent in a combustion chamber, and an adsorbent separated from the solid gas generating agent and stored in a cup-shaped container. The container is provided such that a gap is formed between an opening portion of the container and a ceiling portion of the housing or a member in the housing, and a bottom portion side of the container is inserted such that at least a part of an outer circumferential wall surface of the container directly opposes an inner circumferential wall surface of the inner tube member. At activation, the container is moved by an impact and abuts against the ceiling portion of the housing or the member to close the opening portion.

Abstract: One embodiment of the present invention provides a polymeric ammunition cartridge and methods of making and using the same. The cartridge includes a substantially cylindrical insert connected to a substantially cylindrical polymeric middle body. The substantially cylindrical insert includes a top surface opposite a bottom surface and a substantially cylindrical coupling element that extends from the bottom surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash hole positioned in the primer recess to extend through the bottom surface, and a flange that extends circumferentially about an outer edge of the top surface.

Abstract: The invention relates to a projectile (1) having a sub-caliber projectile core (2) and a guide cage or sabot (3) that comprises a driving element (4), which acts on the projectile core (2) at the rear thereof and is in the form of a plate composed of metal. In order to produce such a projectile (1) at low cost, the projectile core (2) and the driving element (4), which is in the form of a plate, are inserted as inserts into an injection-molding tool, and are extrusion-coated so that the injection-mold shape is chosen so that the contour of the guide cage or sabot (3) of the projectile (1) is produced after the injection-molding process.

Abstract: A propellant charge body for insertion into a propellant charge chamber in a firearm for firing caseless ammunition has a base body which contains a propellant charge. The diameter of the base body is less than the internal diameter of the propellant charge chamber. Radial projections are formed in one or more subareas on the circumference of the base body and match the radius of the base body in these subareas to the internal radius of the propellant charge chamber.

Abstract: A safety fuze for use with a canister, includes a body, a lever that is rotatably secured to one end of the body, a striker assembly that is rotatably secured to another end of the body, and a thumb switch assembly that includes a target and that is rotatably secured to the body. The safety fuze is selectively armed and disarmed. It is settable in one or four states: a safe-locked state; a safe-unlocked state; an armed state; and an initiation state.

Abstract: A downhole tool gun string assembly comprises a first perforating gun operable to generate a first pressure at a first location in a wellbore, wherein the first perforating gun comprises a first plurality of perforating charges; a second perforating gun operable to generate a second pressure at a second location in the wellbore, wherein the second pressure is different from the first pressure and the second perforating gun comprises a second plurality of perforating charges, and wherein at least one of the second plurality of perforating charges is operably associated with a secondary pressure generator, where the first perforating gun and the second perforating gun are configured to maintain a pressure at a selected location in the wellbore below a threshold when the first and second perforating guns are activated substantially concurrently.

Abstract: A wad for ammunition cartridges, including shotshell cartridges, includes a wad body having a series of separable fingers. A shot confinement tube is located within the wad body, surrounded by the separable fingers. The confinement tube extends longitudinally along the wad body and defines a recess in which an ammunition payload is received and is contained upon firing of the ammunition cartridge and as the wad is separated from the ammunition payload.

Abstract: An arrangement for supporting a mortar shell into a breech-loading weapon barrel (2). The arrangement comprises a support piece (6) provided with an edge flange (7) and to be attached to the tail of the mortar shell (1), whereby the arrangement further comprises a connecting piece (8) between the support piece and the mortar shell tail, which connecting piece is arranged to be attached to the mortar shell and the support piece and thus to attach the support piece with a mechanical joint to the mortar shell tail. In connection with the connecting piece (8), there is a point which is arranged to yield in a firing situation and thus to allow the mortar shell (1) to be detached from the support piece (6); and a firing mechanism (17) for firing the actual primer (10) of the mortar shell. The mechanical joint between the connecting piece (8) and the support piece (6) has been formed by means of cotter attachment (14).