Ammunition and explosives – Projectiles – Composite
Patent
1990-09-19
1992-11-03
Tudor, Harold J.
Ammunition and explosives
Projectiles
Composite
102507, 102514, F42B 1206, F42B 1234, F42B 1278
Patent
active
051608057
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a projectile for a cartridge for the hand-held firearms, comprising a core and a core jacket, wherein said core consists of a material which has a higher specific gravity than the material of the jacket and the core and jacket are positively interconnected.
Projectiles having a jacketed core are available in various embodiments. In most cases the core is entirely enclosed by the jacket, which is intended to improve the sliding properties of the projectile in the barrel and to reduce the wear of the barrel and the deposition of material in the barrel (U.S. Pat. No. 1,502,925 and 2,926,612 and French patent Specification 2,429,407). Similar remarks are applicable to projectiles having a very hard core, which has an enlarged tip and is provided with a jacket bushing, which encloses the core with the exception of its tip and is closed at the bottom (French Patent Specification 2,431,676). It is also known to provide in shrapnel projectiles a multiplicity of core particles in a plastic sheath so that the core is held together (U.S. Pat. No. 4,649,829), and projectiles are also known which have a composite screwable core jacket and a specific core, which is reinforced by a closely fitting sleeve. In that case the provision of the core sleeve and the fact that the core is gripped by the jacket elements which have been screwed together are intended to prevent a premature disintegration of the core as it impinges on a target so that the effect of the projectile will correspondingly be increased (Swiss Patent Specification 305,151). In order to achieve a more uniform effect of the projectile on targets spaced at different ranges, projectiles are also known which comprise two cores, which have been inserted one behind the other into an outer jacket, and the rear core is additionally enclosed in a caplike inner jacket so that the impact of the projectile will cause the forward portion to be upset and the rear core will thus be radially expanded to a particularly large extent whereas the parts of the projectile will not be disintegrated and the shock action will be increased (East German Patent Specification 250,986).
With other projectiles which are of the kind described first hereinbefore and have been proposed a specific influence on the effect of the shot is achieved in that the core of the projectile and the core jacket are adapted to each other (French Patent Specification 2,321,108 and 2,497,940). For instance, in the projectile disclosed in French Patent Specification 2,321,108 the provision of a shoulder which radially protrudes over the maximum core diameter results in a strong positive joint between the core and the jacket and the projectile will act like an integral projectile as it impinges and in that case the jacket, which is closed at its tip only by a thin cap, will break inwardly and the entire material from the tip region will be laterally thrown away. This will result in a rapid dissipation of energy and in a good shock action or man-stopping effect. But the ability to penetrate is not satisfactory. On the other hand, in the projectile disclosed in Published French Application 2,497,940 the core and the jacket, which entirely encloses the core with the exception of the bottom, are interconnected only by a slightly upset portion at the bottom end of the jacket so that upon an impact the core will immediately pierce the thin layer of the jacket and only the core will penetrate the target and, as a result, the desired penetrating power but only a weak shock and man-stopping effect will be achieved.
Projectiles expected to have a high penetrating power have previously been made of a material having a high specific gravity and have been propelled by a high-explosive propellent. For this reason such projectiles combine a high penetrating power and large ranges so that in case of a miss such projectile will result in an uncontrolled danger to third persons even at a large distance and such projectiles cannot be used in police operations or the like. In a police operation or the li
REFERENCES:
patent: 1316917 (1919-09-01), Montero
patent: 1384841 (1921-07-01), Lundell
patent: 2321344 (1943-06-01), Whipple
patent: 3143966 (1964-08-01), Burns, Jr. et al.
patent: 4136616 (1979-01-01), Schirneker
patent: 4336756 (1982-06-01), Schreiber
patent: 4819563 (1989-04-01), Bodet
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