Artillery projectile with spreading tail assembly
First Claim
1. In an artillery projectile for launching by means of a launch tube, the combination comprising a spreading tail assembly on the base of the projectile, said tail assembly comprising fins that respectively pivot in a plane that passes through the longitudinal axis of the projectile, about an axis perpendicular to said plane, said fins having an internal edge with at least one projection, means forming an extension of the projectile base, a synchronization ring slidable concentrically on said extension of the projectile base from a forward position to a rear position to cause the simultaneous spreading of the fins and ensure their clamping in the spread position, means forming at least one axially oriented cylinder in the projectile base, a piston slidably mounted in each such cylinder for movement between forward and rear positions and constructed and arranged such that the rear face of said piston will be subjected to the pressure prevailing at the rear of the projectile base and hence the pressure in a launch tube during departure of the projectile, said synchronization ring having, on the one hand, first means cooperating with said at least one piston slidably seated in said cylinder in the projectile base, such that the rear face of said piston will be subjected to the pressure prevailing in a launch tube during departure of the round, to hold the synchronization ring in the forward position with said piston because of launch tube pressures during firing, and, on the other hand, second means cooperating with the said projections of the respective fins to hold the fins in folded position inside the launcher tube when the synchronization ring is held in the forward position, and gas pressure means for subjecting the forward face of said piston to gas pressure during launching, said gas pressure means comprising an enclosed space in said projectile base, means for pressurizing said space during launching, and means for preventing egress of gas from said space at least until destruction of said projectile, such that said gas pressure acts against said forward face of said piston throughout substantially the entire flight of said projectile.
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Abstract
The invention relates to an artillery projectile with spreading tail assembly and a synchronization ring for controlling the orientation of the fins of the tail assembly. The synchronization ring slides on an extension of the projectile base and includes a first means cooperating with at least one piston seated in the projectile base to hold the synchronization ring in the forward position on the one hand, and on the other hand a second means cooperating with a projection of the respective fins to hold the fins in folded position inside the launcher tube when the synchronization ring is held in the forward position. The fins are spread when the ring moves to its rearward position. The movement of the ring may be under the control of one or more of the launching pressure at the projectile base, inertia, a specially generated pressure, rotational forces, or combinations of these.
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Citations
14 Claims
- 1. In an artillery projectile for launching by means of a launch tube, the combination comprising a spreading tail assembly on the base of the projectile, said tail assembly comprising fins that respectively pivot in a plane that passes through the longitudinal axis of the projectile, about an axis perpendicular to said plane, said fins having an internal edge with at least one projection, means forming an extension of the projectile base, a synchronization ring slidable concentrically on said extension of the projectile base from a forward position to a rear position to cause the simultaneous spreading of the fins and ensure their clamping in the spread position, means forming at least one axially oriented cylinder in the projectile base, a piston slidably mounted in each such cylinder for movement between forward and rear positions and constructed and arranged such that the rear face of said piston will be subjected to the pressure prevailing at the rear of the projectile base and hence the pressure in a launch tube during departure of the projectile, said synchronization ring having, on the one hand, first means cooperating with said at least one piston slidably seated in said cylinder in the projectile base, such that the rear face of said piston will be subjected to the pressure prevailing in a launch tube during departure of the round, to hold the synchronization ring in the forward position with said piston because of launch tube pressures during firing, and, on the other hand, second means cooperating with the said projections of the respective fins to hold the fins in folded position inside the launcher tube when the synchronization ring is held in the forward position, and gas pressure means for subjecting the forward face of said piston to gas pressure during launching, said gas pressure means comprising an enclosed space in said projectile base, means for pressurizing said space during launching, and means for preventing egress of gas from said space at least until destruction of said projectile, such that said gas pressure acts against said forward face of said piston throughout substantially the entire flight of said projectile.
Specification