Abstract: A projectile body having a groove-shaped recess (2), in which a guide band (3) is disposed. To permit use of a relatively wide guide band (3), while preventing the band from being destroyed as the projectile body (1) passes through the gun barrel, and preventing significant copper-plating of the barrel, the guide band (3) is assembled from two partial guide bands (5, 6), with the relatively narrow, first partial band (5), which faces the base (7) of the projectile, comprising copper or a copper alloy and providing a seal against the propellant gases acting on the projectile rear under high pressure. The second, considerably wider partial guide band (6) essentially comprises plastic, and includes at least one hollow space (11), which lends it adequate deformation reserves with respect to the high surface pressure acting on this partial guide band (6) when the projectile body (1) passes through the barrel.

Abstract: The present invention relates to a method and a device for improving—at least in part—the external ballistics of primarily the type of artillery shells (1) that are fin-stabilised in their trajectory towards the target and thus have a slipping plastic driving band (6) which, during firing of the said shell from a designated barrel, constitutes the shell's direct contact with the inside of the barrel. The problem that it is the function of the present invention to resolve is that the slipping plastic driving band (6) normally detaches immediately outside the muzzle of the barrel used for firing, thereby leaving an open groove (4) that causes distrubing turbulence which is detrimental to the flight of the said shell.

Abstract: A full-caliber projectile having a cylindrical guide region (5) and an ogival projectile tip (7). To improve the stabilization of the projectile (1) inside a gun barrel (2) in a simple manner, and therefore improve the intermediate ballistics and hit accuracy over those of comparable projectiles, a guide ring (8), which is segmented in the circumferential direction, and whose outer diameter is smaller than the inner diameter of a gun barrel (2) of the same caliber, is secured to the projectile tip (7) such that the radially spaced guide-ring segments (9) detach from the projectile (1) in the gun barrel (2) when a predetermined firing acceleration occurs in the gun barrel, and the segments (9) are pushed toward the projectile (1), axially relative to the cylindrical guide region (5), by dynamic pressure until they rest against the inside wall (18) of the gun barrel (2) and against the projectile (1).

Abstract: An obturator is provided for a projectile launched from a gun barrel. The obturator includes an annular ring that is fabricated from a high-temperature resistant composite material. The annular ring has an inner surface that is in contact with the projectile. In addition, when the projectile is fired from the gun barrel, an outer surface of the annular ring contacts an inner surface of a bore of the gun barrel. When the projectile is fired from the gun barrel, the radial distance between the inner surface and the outer surface of the annular ring substantially equals or exceeds the radial distance between an outer surface of the projectile and the inner surface of the bore of the gun barrel at at least one point. This configuration restricts a flow of charge gases from an aft end of the projectile to a forward end of the projectile as the projectile is fired from the gun barrel.

Abstract: The invention relates to a bullet having a tapered nose and a cylindrical base. The base is provided with an annular groove having a diameter less than the bore diameter of the barrel of the gun from which it is fired to reduce the force required to move the bullet through the barrel to increase the muzzle velocity and kinetic energy of the bullet.

Abstract: A method of minimising misfiring or alleviating their consequences is provided by forming at least each trailing projectile (30) in a series of housed projectiles with a sealing portion (34) extending about a tapered anvil portion (31) and moveable therealong for expansion into sealing engagement with the barrel (11). The sealing portion (34) disengages forwardly in response to a misfire or the like to provide a bleed path for igniting the propellant charge (41) associated with the next leading projectile (30).

Abstract: A spin-stabilized projectile includes a projectile body having a longitudinal axis; a metal driving band mounted on the projectile body and having a circumferential groove surrounding the axis; and a plastic sealing ring seated in the groove and affixed to the projectile body.

Abstract: A spin-stabilized projectile includes a projectile body having a longitudinal axis, a forward and a rearward direction; a metal driving band mounted on the projectile body for transferring spinning forces to the projectile body; a circumferential groove provided in the outer surface of the projectile body rearwardly of the metal guide band; and a metal sealing ring seated in the groove and being freely rotatable relative to the projectile body.

Abstract: A spin-stabilized projectile adapted to be fired from a weapon barrel, includes a projectile body having a length dimension, a rear length portion, an ogive-shaped front length portion and an intermediate length portion situated between the rear and front length portions; a metal guide band circumferentially mounted on the projectile body; and an undercut provided circumferentially in the intermediate length portion to define an annular chamber with an inner surface of the weapon barrel during travel of the projectile in the weapon barrel upon firing for effecting a pressure equalization of propellant gases flowing past the metal guide band to center the projectile within the weapon barrel.

Abstract: A rifled weapon tube (1), from which spin-stabilized projectiles (8) with driving bands (9) are fired. In order to reduce manifestations of wear on a driving band (9), it is known to stabilize a spin angle (&dgr;) occurring during the firing or to cut deeper rifling grooves (3) into an inside wall (2) of the weapon tube (1). Both options can be realized only within limits as the compatibility between weapon tube (1) and projectile (8) must be ensured. The invention provides for another option of reducing the wear on the driving band (9). Increasing the number of rifling grooves (3) on the tube inside wall (2) reduces the frictional stress that occurs on the driving band (9). This new type of design for the rifling groove flanks (5), formed between a groove bottom (7) of rifling groove (3) and a lands (4) between the rifling grooves (3), reduces the total wear volume on the driving band (9). In this case, the rifling flanks (5) extend nearly perpendicular to the rifling groove bottom (7).

Abstract: The construction and arrangement of the projectile bearing surface interfaces rearward and forward of a recessed surface chamber of the projectile interface conjointly with the interfaces of bore wall areas segmented by recessed bore chambers which in conjunction effect the deployment/transport/dispersement/development/modulation and transformation of explosive propellant charges sequentially primed and activated rearward and forwardly of the projectile along the bore and in bore wall chambers captively converting high static gas pressure to expansively relieved dynamic propellant gas pressure directly at the projectile reducing firearm barrel recoil while energizing projectile movement along the bore in a closed-system of thermodynamic propellant energy for free flight purposes.

Abstract: The projectile is made of a virtually lead free steel alloy containing tellurium. This projectile is more environmentally safe compared to conventional lead bullets. The tellurium in combination with a small amount of lead provides a steel alloy having a high machinability and good lubrication properties, thus reducing frictional wear inside a rifle bore when the bullet is passed therethrough. Additionally, a thin anticorrosive coating may be applied on the bullet. The coating may comprise a metal selected from the group consisting of copper, zinc and nickel. An additional lubricating coating comprising polytetrafluoroethylene may also be applied on the projectile. The projectile has a grooved guide section that is permitted to be deformed by the rifle bore without destroying the rifle bore when the projectile is fired in a rifle.

Abstract: A spin-stabilized projectile includes a projectile body having a trailing end; a first circumferential groove provided in the projectile body; and a second circumferential groove provided in the projectile body between the first circumferential groove and the trailing end of the projectile body. A rotating band is received in the first circumferential groove and a sealing ring is received in the second circumferential groove. The scaling ring has a radial and an axial clearance of between 0.5 and 1 mm from the walls of the second groove.

Abstract: A propellant gas sealing device for gun munitions includes a piston attached to the rear of a projectile by a separable connecting device, and a piston that isolates the projectile from the propellant charge. A low pressure seal carried by the piston is designed to ensure the gastightness between the piston and the gun chamber, and a high pressure obturator carried by the piston is designed to ensure the gastightness between the piston and the gun barrel.

Abstract: A bullet for a rifle. The bullet having a nose, a cylindrical body surface, a rotating band section spaced from the cylindrical body surface. A streamlined section disposed between the rotating band section and the cylindrical body surface. The streamlined section is made up of a frustoconical front section, an apex and a base having a base joining the cylindrical body section, a frustoconical rear section having an apex joining the apex of the frustoconical front section and the frustoconical rear section having a base joining the rotating band section and a boat tail bullet. The streamlined part of the bullet improves the range, stability, velocity and trajectory of the bullet. A machine is disclosed for manufacturing the bullet.

Abstract: A method of welding a soft-iron guide band on a steel projectile body includes the steps of applying a layer of nickel or a nickel alloy to the projectile body and applying a soft-iron wire as the guide band to the layer by electric protective gas welding.

Abstract: A double ramped, saboted, kinetic energy assembly automatically aligns a jectile in a gun tube. The assembly has an acceleration activated device consisting of a split centering ring causing alignment during the early phase of the shot motion of the projectile. The assembly also includes a series of small protrusions or a continuous expandable ring which forces and maintains the projectile into a straight aligned position during its traversal of the gun tube. The assembly may have either a smooth bore or a rifled bore gun tube. The disclosure also include a method related to the assembly.

Abstract: To provide a complete seal in the region of the rifling, particularly in worn-out gun barrels firing spin stabilized carrier projectiles provided with a metal guide or driving band and a thin-walled projectile connected to a projectile base and having a wall thickness less than or equal to 0.05 times the caliber of the gun barrel and to reduce the ramming deceleration and the radial pressure stresses on the projectile shell during passage through the gun barrel, a plastic ram ring is disposed on the outer surface of the projectile shell in front of the metal guide band and in a region of the shell that is not supported radially by the projectile base.

Abstract: A frangible projectile made from powdered metals comprising a body of either iron and carbon, or of iron and alumina. The powdered metals are compacted, sintered, and cooled.

Abstract: In projectile bases (20) for carrier projectiles which are equipped with a cavity (26) on the side facing away from the projectile tail for, for example, a parachute, it may happen that the base plate (23) is axially bent through during firing. This causes the base body (22) to be radially constricted and contact is lost between the rotating band (27) disposed on the body (22) and the gun tube, frequently resulting in a gas breakthrough. To avoid the above-mentioned radial constriction in the region of the rotating band, the projectile base (20) is provided with a base plate (23) which is curved toward the tail of the projectile. The curved configuration of the base plate (23) makes it possible to produce radial widening in the rear projectile base region during firing so as to ensure gas tightness and spin transmission from the rotating band (27) even at high gas pressures.

Abstract: A high-explosive projectile including a projectile body having a forward region and a tail region which transitions to a base, with an explosive charge disposed within the body and detonated by a suitable fuse, and a driving band disposed on the outer circumferential surface of the projectile body in the tail region, wherein the wall thickness of the tail region of the projectile body is substantially the same as the wall thickness of the forward region of the projectile body; the tail region of the projectile body has a cylindrical shape up to its transition to the base and forms a circumferential edge at the transition; and the rearward, gas pressure receiving side of the driving band is disposed adjacent the circumferential edge.

Abstract: A bullet assembly includes a nose member having an outer cylindrical wall terminating at its forward end with a generally hemispherical nose. The nose member also includes an inner wall defining a concentric cavity inside the nose member having a predetermined axial depth. The bullet assembly also includes a base member having a cylindrical body portion and a projection that extends away from an upper surface of the body portion. The projection engages the inner wall of the nose member to secure the nose member to the base member. The projection has an axial length smaller than the predetermined depth of the cavity to form a hollow region completely disposed and enclosed inside the nose member.

Abstract: The present invention relates to a spin-stabilized carrier projectile having a projectile base which is connected with a projectile body for carrying sub-ammunition projectiles, and a driving band arrangement connected respectively about the projectile base and about the projectile body for engaging the rifling of the gun barrel to impart spin respectively to the projectile base and the projectile body. The driving band arrangement includes a first partial driving band connected coaxially about the projectile base and a second partial driving band connected coaxially about the projectile body. This driving band arrangement reduces the spin forces transferred by the joint between the projectile base and the projectile body, thereby reducing the required joint strength. This in turn reduces the required ejection charge used to separate the projectile body and projectile base for release of sub-ammunition bodies contained in the carrier projectile.

Abstract: A spin stabilized projectiles (1) having a rotating band (3) arranged on the shell body (2), with such rotating band being provided with grooves (35, 36, 37) to receive rotating band material sheared off toward the rear during passage of the projectile (1) through a gun barrel (4) so that the transfer of spin is effected with the aid of annular rotating band zones (31, 32, 33, 34) which form spin transfer ring. The diameter (38) of at least one spin transfer ring (31, 34), preferably the rearmost ring, is larger than the diameter (45) of the rifling grooves (42) in the gun barrel (4). Due to the high radial pressure on the shell body in the region of the rotating band, great radial deformations may occur, particularly in thin-walled shell bodies. The consequences are untightness of the rotating band and too much stress on the projectile.

Abstract: A fin-stabilized projectile for weapons selectively possessing either a smooth, and in particular, a rifled weapon barrel, which possesses a discardable thrust ring constituted of segments arranged on the central form-fitted component, and of a through-sliding guide band, and which is provided at the tail end of the projectile with a multi-finned stabilizing guidance mechanism which is rotatable about the longitudinal axis of the projectile.

Abstract: A projectile for firing from a gun barrel which comprises a projectile body having a radial and longitudinal directions; a rotating band disposed on the projectile body and having at least one material receiving groove to accommodate rotating band material sheared off during passage of the projectile through the gun barrel, and at least one pressure relief groove located in a region of the rotating band where the projectile body is subjected to maximum stress in the radial direction.

Abstract: A method of applying a metallic guide band to the body of a projectile having particularly thin walls comprises making fine particles plastically deformable by heating thereof, and spraying said heated particles at high speed onto a surface section of the projectile body until a desired layer thickness of the guide band is attained. A projectile body having a circumferential guide band is produced by the method of the invention. The thin-walled projectile body has a boundary layer region on its exterior which may be roughened and/or deoxidized. The boundary layer region is formed by an intermediate layer which may be composed of molybdenum, nickel aluminide or nickel oxide and itself has a roughened boundary layer region on its exterior. This results in a particularly intimate physical bond with the particles of alloy of the guide band. The alloy is preferably of a CuZn85/15 type and has a porosity of up to 5 volume percent.

Abstract: A projectile which is fireable in a spin-stabilized manner from a weapon barrel or launch tube through the action of the gas pressure generated by a propellant charge, and which projectile is guidable during flight. The projectile is equipped in the rearward region of its tail-end structure, and preferably behind the control surfaces, with a type of propulsion cage so as to, through the intermediary of the gas pressure generated by the propellant charge, faciliate a ballistic firing of the projectile from a weapon barrel or launch tube. The projectile is equipped with a sealing ring, which with a gliding frictional contact, coaxially encompasses an axially-limited region of the tail-end structure of the projectile.

Abstract: A bullet for muzzle loading black powder rifles having an elongated cylindrical metal body. The metal body includes a front paraboloidal segment and a recessed base. A rear expansion band for initially guiding the bullet into the rifled bore and for tightly sealing the explosive gases upon firing of the rifle. A front rifling band which is cut by the lands of the rifling to cause rotation about the longitudinal axis of the bullet. An intermediate knife-like cleaning band which removes residue from the rifled bore as the bullet is propelled outwardly by the explosive gases.

Abstract: A two-piece despin obturator mounted on a forwardly inclined obturator ramp on the projectile sidewall has a ring-shaped body of nylon-6 and a wiper band formed from Plascon nylon. The two-piece design is relatively immune to damage in the handling and loading process but yet the wiper band enhances low pressure sealing while the ring, driven up the inclined ramp in the firing process, engages the lands of the spiraled rifling. The rotational velocity imparted to the ring is partially coupled as the inner surface of the ring rotates on the obturator mount of the projectile.

Abstract: A testing and/or practice projectile assembly for preselected use in an artillery weapon in lieu of conventional live ammunition. The projectile assembly includes a casing which has an axial length which is less by a predetermined distance than that of the conventional live projectile. An insert member is operatively mounted in said casing. The length and diameter of the insert member is such that the exterior contour and total length of the projectile assembly (insert member and casing) corresponds to that of a conventional live projectile when the insert member is operatively mounted on the casing. The insert member has an annular recess and guide band segments are mounted in the recess. The guide band segments are pressed outwardly to conform to a predetermined exterior guide band diameter and can be selectively retractably released. A pull rod is coaxially connected to the insert member and band segments via a biasing cone so as to selectively release the band segments.

Abstract: The invention is an improved means for the efficient discard of multi-segt sabots. The invention consists of a ring-like mechanism that holds the aft end of the sabot segments in place around the projectile. The ring-like mechanism also serves to seal the interface between the sabot and the projectile. In operation, after the projectile and sabot exit from the muzzle of the launch device, the ring-like mechanism acts as a hinge device which causes the individual sabot segments to pivot about their aft extremity and finally discard as the pivot ring releases.

Abstract: Apparatus for centering the aft end of a missile in a telescoping launch e including equally spaced bore rider members bonded in the detent groove of a missile at the aft end of the missile. Each bore rider member includes upper and lower portions having a notch therebetween. The bore rider shears at the notch as the rider impacts the inner launch tube ramp. The remaining base is retained in the detent groove and centers the missile in the smaller launch tube as the missile moves along the smaller tube.

Abstract: System for clearing both light and heavy obstacles, in which one or more flying metal plates are propelled against heavy obstacles by explosive forces which also expand a folded continous rod member into a curvilinear, generally annular configuration that cuts through light obstacles such as concertina wire in the process of unfolding.

Abstract: An improved multipurpose projectile obturator of composite, frangible conuction where the obturator preferably forms part of a projectile that is launched from an upstanding tube. The tube interior is provided with an alternating series of helically arranged groove and land means. A projectile at its propellant end is provided with an annular shoulder that faces in a direction toward the propellant end. An obturator is generally made up of an elastomeric band of a suitable grade of rubber. The band in being placed about the projectile surface and against the shoulder is positively retained as the projectile is inserted in the tube and launched therefrom. The outer periphery of the band has an annular groove for receiving a ring-like element. This element is preferably of three-ply construction and is also preferably made up of two half sections that are suitably bonded to the groove about the band periphery.

Abstract: A projectile that is to be fired through a gun tube with high pressure gas, as a central load and a jacket. The jacket encircles the load and has a rearwardly directed appendage flaring outwardly from the jacket. This appendage is formed of a flexible material for outwardly and radially deflecting in response to application of said high pressure gas.

Abstract: A projecetile for firing in a gun barrel has a jacket and a load. A bearing leeve is mounted in the jacket and the jacket is of a different material than the bearing sleeve. A journal sleeve is mounted in the bearing sleeve to axially rotate therein. The load is mounted in the journal sleeve to rotate therewith. Thus angular rotation of the load with respect to the gun barrel is reduced.