Patent Publication Number: US-3968945-A

Title: Shaped mini charge round

Description:
DEDICATORY CLAUSE 
     The invention described herein was made in the course of or under a contract or subcontract thereunder with the Government and may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to me of any royalties thereon. 
    
    
     BACKGROUND OF THE INVENTION 
     This invention relates to the field of missile detonation. Existing rounds used for destroying incoming motar, rocket and artillery rounds having an inherent disadvantage of requiring high speed as well as being a solid kinetic energy round. These requirements have caused problems in reliable ignition of the main primer and possible falling danger to friendlies. 
     SUMMARY OF THE INVENTION 
     The present invention has overcome this disadvantage by utilizing a round requiring a lower impact velocity while having a greater impact angle tolerability. The invention also provides for self destruction of the round in the event of missing the target. This is achieved by the use of a single inertia weight stabber to initiate delay and main charges. 
     This invention may be better understood from the following detailed description taken in conjunction with the accompanying drawing. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a diagrammatic side view of the round. 
     FIG. 2 is a diagrammatic side view of a modified delay ignitor. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Reference numeral 10 indicates a round case which when carried by a missile warhead, not shown, has spring fins 12 held in the stowed position by adjoining rounds or interstitial baffles. In the stowed position one of the fins has a pin 14 that enters a recess 16 in a slidable inertia block 18. A compression spring 20 exerts a force on the block tending to move the block rearwardly. However the engagement of pin 14 in recess 16 prevents any axial movement of the block. The blocks of the rounds shown are provided wih a forward stabber 22 and the block shown in FIG. 1 also has a rear delay stabber 24 mounted thereon. In FIG. 2 the rear delay stabber 25 is mounted on a fin 12. The round ignition system of both modifications includes a primer 26, a booster 28, a charge 30, a delay charge 32 and a delay charge path 34. Sufficient time delay is provided by path 34 to allow impact with a target. However after this time delay period the delay charge causes detonation of the main primer and self destruction of the round. 
     Upon impact with a target block 18 moves forward by inertia and carries stabber 22 to strike primer 26, booster 28 and charge 30. The charge detonates and forms a hot, high pressure, high velocity plasma jet with cone 36 which impinges upon the target. The action of the plasma jet penetrating the target case and contacting the charge detonates the target. Or, if the plasma jet produces high internal stresses within the case to cause internal spalling, charge detonation should occur. If the round misses the target the delay charge 32 which was ignited at projectile launch as shown in FIG. 1 by released stabber 24 by the action of spring 20, will initiate the explosive chain. In FIG. 2 the charge is struck and ignited by stabber 25 which is actuated by fin 12.