DE1053978B - Bullet impact fuse - Google Patents

Description

GERMAN

The invention relates to a projectile impact fuse, which consists of a head fuse and a arranged at the rear end of the projectile, seated in an axially displaceable bolt consists, the detonator bolt in a rear safety chamber by a locking device held, is released from this device only after the launch and only then in an advanced position intended to initiate the explosive charge can reach.

Experiments with such projectiles have shown that sometimes when the fire is transmitted from the head fuse under the effect of the gas blast and the particles flying away from the head fuse, the ignition charge runs back again and leaves the advanced position before the explosive charge of the projectile ignited bat.

The invention is directed to 'avoid this disadvantage and to ensure that the Head fuse in the rear part of the projectile assigned detonator from its advanced position can't move back again. This is achieved according to the invention in that the displaceable Detonator bolt is assigned a positive locking device of such a type that it blocks the detonator bolt in the advanced position.

In a preferred embodiment of the invention, the locking device contains a rigid element from im essentially cylindrical shape, which is attached behind the detonator and in a guide in the Bottom piece of the socket receiving the detonator pin in axial direction into that of the detonator released in the sleeve chamber is slidable, the length of the locking element selected is that it is completely released into the chamber that has become free in the box, while being released from the guide, which has a larger diameter than the guide slips in. Once that is done, it shifts dais locking element in the chamber laterally under the action of gravity and possibly also under action the centrifugal force when the projectile is locked with a twist, so that the locking element does not return can enter into his leadership and slide back.

The blocking element preferably consists of a tube which is open at both ends and which is widened at the front Has a head larger in diameter than the guide.

The drawing shows an example of the execution of the locking device of the projectile fuse of the invention, namely shows

1 shows a partially broken away side view of a shaped charge bullet seated in a cartridge,

Projectile impact fuse

Applicant:
Institution

for the development of inventions
and commercial applications
ENERGA,
Vaduz (Liechtenstein)

Representative: Dipl.-Ing. G. Weinhausen, patent attorney,
Munich 22, Widenmayerstr. 46

Claimed priority:
Switzerland from May 13, 1957

Fig. 2 is a partial view in longitudinal section through the rear part of the projectile body with the detonator of the head detonator in the retracted safety division,

3 and 4 show the same partial view in different positions of the detonator and that associated with it Locking device after the detonator is released.

The projectile has a head fuse 1, a conical projectile hood 2 and the actual projectile body 3, which contains a hollow charge 4 and an explosive charge 5 located behind it. The shaped charge 4 is provided with a conical sheet metal lining 6 in the usual manner. The buttock body 3 sits in a cartridge case 7. A safety device 8 is attached in the tail 9 of the projectile behind the explosive charge. As can be seen from Fig. 2, this safety device contains a detonator pin 10, which is held in the inoperative position outside the explosive charge 4, 5 by a locking device. This locking device consists of balls 11 which are arranged in recesses 12 in the wall of a rear sleeve 13 before firing, whereby they protrude slightly inward and are held in this position by a ring 14 which is pressed forwards by a spring 15 .

809 787/87

Claims (3)

The bottom piece 16 of the sleeve 13 has an axial guide 17 in which a rigid tubular element 18 can slide. The element 18 is open at both ends and its widened head 19 has a larger diameter than the guide 17. It is held between the bottom of the detonator bolt 10 and an annular seal 20 which rests on a corresponding surface of the base piece. When firing, because of the acceleration of the projectile in the gun, the ring 14 runs against the spring 15 to the rear. When the driving force ceases, the detonator bolt 10 moves forward in the decelerating projectile due to its inertia, while the balls 11 emerge laterally from the openings 12. A slight turn of the projectile holds the balls in the unlocked position. Fig. 3 shows the advance of the detonator bolt 10 into the effective position after the locking device has been switched off. The element 18 follows the detonator pin 10 in its movement and also slides forward in the guide 17. In the operative position (FIG. 4) the detonator bolt 10 rests against the sleeve 21, the bore 22 of which allows the fire to be transmitted between the head detonator 1 and the detonator 10. The locking element 18, which has left the guide 17, then passes completely into the sleeve 13 and, under the effect of gravity and the centrifugal force, assumes an eccentric position relative to the guide 17. The sleeve 21 has on its rear side an annular projection 23 on which a sprue 24, which is fastened to the head of the detonator bolt 10, slides with friction (FIG. 4). The sprue 24 has an axial hole 25 which, in the operative position of the detonator bolt 10, continues the bore 22. The detonator pin 10 cannot return to its initial position, because beforehand the rear end of the locking element 18 would strike the inner edge of the guide 17. A slight play is provided between the rear end of the locking element 18 and the inner shoulder of the base piece of the sleeve 13 in the operative position of the detonator 10 in order to enable the locking element 18 to be locked more easily. However, this play is not sufficient to allow the detonator 10 to leave the operative position. When the projectile hits the target, the head detonator 1 transmits the fire through the bore to the detonator 10, which is positively locked in the operative position by the locking element. Patent claims: 1. Bullet blow-up fuse with a head fuse for transferring fire to one in one axially displaceable bolt seated detonator, the detonator bolt in a rear socket within a safety chamber behind the projectile body by a locking device is held until the locking device switches off the detonator bolt after firing and the primer releases, after which the detonator is pushed forward into its intended to initiate the explosive charge Can get location, characterized by such a form-fitting locking device, that this blocks the detonator pin (10) in the advanced position. 2. igniter according to claim 1, characterized in that the locking device is a rigid element (18) of substantially cylindrical shape, which is attached behind the detonator (10) and in a guide (17) in the bottom piece (16) of the sleeve (13) in the axial direction in the by the detonator (10) in the sleeve (13) released chamber is slidable, the length of the locking element (18) is chosen so that it is completely in the free of the guide (17) the chamber that has become free in the bushing (13), the larger Durohmesser than the guide (17) has slipped into it. 3. igniter according to claims 1 and 2, characterized in that the locking element (18) is on is an open tube at both ends, with a widened head of larger diameter than the front Has guide (17). 1 sheet of drawings © 809 787/47 3. 59