DE1259740B - Impact fuse for twist projectiles - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

F42c

German class: 72 i- 3/10

Number: 1 259 740

File number: R 39998 I c / 72 i

Filing date: February 26, 1965

Opening day: January 25, 1968

The invention relates to an impact fuse for twist projectiles with a centrifugal force delayed erectable rotor and two independent, successively ineffective rotor locks, one of which consists of an axially displaceable, there is a firing pin bolt that fixes the rotor in the transport position.

In a known percussion fuse for twist projectiles with a centrifugal force in a The rotor, which can be erected in the ignition position, has a support surface directed transversely to the igniter axis, the locking body of a locking device as a system for movable locking bodies which can be brought out of contact with the rotor is provided, which in turn to cancel the rotor lock with movable, in the transport position, the locking body is provided with release elements that secure it against displacement, wherein the trigger members and the locking body respond one after the other and thereby the only Release the rotor, which has been dragged along by friction, to straighten it up.

Securing the rotor in this way is not sufficient, however, if greater safety of the front pipe is required will. Therefore, this known percussion fuse has been improved in that the rotor can only stand up through parts of the locking device. This straightening up in the ignition position is achieved in that the locking element in the transport position on the rotor support surface rests, eliminates this support in the ignition position and at the same time a contact between the Ignition pin and the rotor is prevented during its righting movement. In other words: When firing, a fuse element is compressed, so that a shortening of the same occurs, as a result of which after completion of the projectile acceleration locking members under the influence of the centrifugal force of the Rotor support surface can be lifted off, at the same time under the shoulder of the firing pin take hold of it and also lift it until the locking elements are outside the shoulder. As a result, the rotor can now stand up in the ignition position. In this situation, the upstream pipe safety is completed.

The locking members can consist of four stones with conical surfaces or one one-piece slide that is moved to the side by centrifugal force and thereby the firing pin releases.

In this known percussion fuse, the locking members determine the safety of the front pipe, i. h., the Impact fuse for twist projectiles

Applicant:

Rheinmetall G. m. B. H.,

4000 Düsseldorf, Ulmenstr. 125

Named as inventor:

Fritz Berger, 4000 Düsseldorf;

Dipl.-Math. Franz Schaadt, 4151 Willich

Locking members not only give the rotor to straighten up when escaping, but also at the same time the shoulder free the ignition pin. A particularly high level of safety in front of the pipe cannot be achieved in this way.

In another known percussion fuse, the transport position of a centrifugal rotor is used secured by a displaceable ignition needle in the longitudinal axis of the detonator. This is done through a Flattening of the cylindrical rotor surface against which the bolt carrying the ignition needle is supported. There are located between the ignition needle, which extends into a rotor recess, and the ignition tip two rotor fuses, one built into the tip of the igniter, due to the back pressure heat fusible pill, by means of which the needle pin is subject to axial movement and thus to a release of the rotor is prevented, and two arms articulated on the needle pin with roller-shaped Centrifugal bodies that strive to follow the needle pin through a component of their centrifugal force to pull the front and thereby cause the release of the rotor. Melts after leaving the tube due to the friction of the air the pill, so that now the needle pin by the force of the centrifugal body is pulled forward and the rotor can stand up in the ignition position. This is the upstream pipe safety completed.

Taking into account that in an average temperature range from -30 ° ⁰ C to be shot to + 3O, said gradient of 60 ° C is about half the melting temperature of the group consisting of Wood's metal pill, it becomes clear as a function of the onset of melting the pill is on the air temperature. However, since the front pipe safety with the immediately following tightening of the needle bolt

709 720/146

3 4

has ended, if the melting begins early, the point at which the tape roll begins to open is

Pill the pre-pipe safety already close before the projectile has already left the pipe. To

Pipe finished. then the opening of the tape roll is also complete

Furthermore there is a percussion fuse with a and the rotor through the opening freely into the Rotor fuse has become known, in which the can set up the 5 ignition position, again one passes

The rotor is locked in the transport position, a certain flight path which is sufficient overall

agent consists of a slotted ring around the projectile one opposite the known

is radially expandable by the influence of the power of the eyes and at the same time the proposed solutions have significantly increased front pipe

releases the rotor so far that it is safe to do so.

Set up transport position in the ignition position ι ο Further details of the invention are from the

able. When releasing the rotor, a description is given in front of the description and a reference is made to the drawing

the locking slide lying on the side of the ignition channel can be seen in the exemplary embodiment explained in more detail,

moved so that now the ignition path from the rotor and that shows

until the projectile charge is exposed. The fact that Fig. 1 shows an impact fuse with a cutting device Centrifugal force only to spread the slotted ring 15 device and a tape roll in the transport position

the upstream pipe safety is also with this one in longitudinal section,

knew very little impact fuses. FIG. 2 shows the serve-up shown in FIG. 1 is still a bullet fuse with a ball fuse in the longitudinal rotor after the pre-pipe safety has been completed known, that of a ring collar along with trim.

ring is enclosed in such a way that the one 20 The impact fuse shown consists of two

Closure compared to the rotor only a few main sub-assemblies, namely the self-destruct system

having contact surfaces. Outside on the ring and the front pipe lock.

The self-destructing system sits firmly in the front part of the ring on the ring collar, while that of the detonator housing 1, which is embedded in the outer ring in the bullet jacket and follows through 25 to the rear. The per se known disassembly is held in a ring. The entire interior system consists of a sleeve 2 with the ball runner of this igniter, consisting of the rotor, the surface 3, the ball carrier 4 with the balls 5 and the ring collar with locking ring and inner ring, is spring 6. These parts surround the fuze plunger 7, thus easily rotatable with respect to the projectile casing, which in turn is mounted with its upper end behind the axis of the projectile. A change 30 membrane is located and extends at the lower end into a central bore of the ball carrier 4 up to the launch of the projectile, is prevented by the in one of the two blind bores. Under the bolt 4 a with a protruding ignition tip 4 b, the effect of the projectile occurring when firing is formed.

acceleration occurs first of all the firing pin 35 In the in FIG. 1 shown detonator transport of the blind hole and thus gives the rotor position, the ignition tip 4 b protrudes into a blind hole. However, this is only able to get into the ignition 9 α of the rotor 9, which in turn erects in a position when a correspondence between the sleeve 2 and the igniter body 10 is supported between the cavity created by the spin. In the central rotation and the relative movement of the rotor, there is a hole 11 in the rotor 9 and a squib 12 is set. This bedded for erecting the rotor.

required period of time corresponding to only such the end surface of the firing pin 4 is located on one α

Deceleration factor, as it applies to the projectile to the rotor flattening 13, while the rotor 9 is also

Aiming for a completely normal front pipe safety with two more parallel to the fuse axis is given. 45 has flats 14 on its surface.

The invention has for its object to provide a width approximately the distance of the sleeve 2 from Impact fuse for twist projectiles with a lower fuse body 10 corresponds. These flats 14 The influence of centrifugal force delayed erectable rotor to be provided by a with a slight preload, surrounded by the tape winding 15 seen both by the firing pin bolt, which allows it to be fixed and, independently of it, to form a compact spring assembly, as long as it is prevented, the tape reel 15 is perpendicular to the To straighten up in the ignition position until the igniter axis is fired symmetrically to the rotor axis the tube is already housed with a previously unassigned cage 17, with the one that can be pulled out from the outside Has left the safety distance. diameter of the cage 17 is such that the

According to the invention, the object is achieved by the fact that the second rotor assembly from one of the opened tape reels 15 is greater than the inner lap diameter of the 55 when escaping. the outer Rotor with preload enclosing, per se, diameter of the closed winding. Below known, radially expandable tape wrap. of the rotor 9 is located in the igniter body

When firing, not only the central twist hole 16 ″ act.

centrifugal force generated by movement, but also the 60 The mode of operation of the detonator is as follows:

The rotor 9 is in the transport position

waiting forces on the tape roll, this with its axis of symmetry in an inclined position to

however, due to the centrifugal force around a multi-fuse axis. In this position he will both

faehes overriding inertia so long in dureh standing under the influence of the spring 6

remains in its locked position until the projectile 65 firing pin 4 α and through the tape roll 15

acceleration is ended and thus maintained, so that neither the ignition tip 4 & in the

Resistance forces subside, so that now the squib 12 of the rotor 9 penetrate another

Centrifugal force can take full effect. At this time ignition transmission can take place even if the

Should a premature ignition of the squib 12 occur.

Under the effect of the projectile acceleration occurring during launch, the entire interior of the detonator remains in the position shown in FIG. 1 shown locking position. Although the projectile is given a twisting movement from the moment it is fired, the centrifugal force (centrifugal force) generated thereby - which should already cause the tape roll 15 to escape - is only a fraction of the inertia forces that occur when the projectile is accelerated, so that the latter do not allow the centrifugal force and thus the pulling out of the tape roll to take effect. Towards the end of the acceleration, ie when the projectile has already passed the muzzle, the inertia forces subside and the centrifugal force can have a full effect due to the projectile twist, the balls 5 are moved outward along the ball bearing surface 3 of the sleeve 2, whereby they are axially displaceable , consisting of the ball carrier 4 and the igniter plunger 7 press against the force of the spring 6 in the direction of the igniter tip. In this case, both the firing pin 4 α lifts off the flat 13 and the firing tip 4 b lifts out of the blind bore 9 α, so that the rotor 9 is no longer secured from this side.

Through the tape wrap 15, which only - as described above - when the inertia forces decrease, d. H. when the centrifugal force takes full effect with the fleeing, however, this will be the case Erecting the rotor 9 delayed until the full circumferential surface of the rotor 9 through the inner Turn of the escaping tape roll 15 passes through it. Which is also under the effect of Centrifugal force standing rotor 9 straightens up from an inclined position until its axis of symmetry with the fuse axis coincides.

According to FIG. 2 with the ineffectiveness of the second safety device, the upstream safety device designated route ended. If the detonator hits the target, will the detonator push it? with the ignition tip 4 δ pierced the detonator 12, which is now freely accessible in the rotor 9, which in turn detonates the detonator, not shown, and thus the explosive charge.

In the decomposition system, under the influence of centrifugal force, the balls 5 that have run up hold the pretensioned spring 6 on a section of the trajectory Force of the spring 6, the latter is able, via the ball carrier 4, to let the firing needle 4 b snap forward towards the squib 12 in order to cause the projectile to self-disintegrate at a predetermined point on the trajectory.

Claims (2)

Patent claims: 1. Impact fuse for twist projectiles with a centrifugal force in the ignition position delayed erectable rotor and two independent, one after the other ineffective rotor locks, one of which is axially displaceable, in the transport position The ignition pin bolt fixing the rotor, characterized in that the second rotor fuse consists of a rotor (9) with pre-tension surrounding, known, radially expandable tape roll (15) consists. 2. Impact fuse for twist projectiles according to claim 1, characterized in that the Tape roll (15) arranged perpendicular to the fuse axis and symmetrically to the rotor axis Cage (17) is housed, the outer diameter of which is dimensioned so that it is the open Tape roll (15), the inner winding diameter of which is larger than the outer diameter of the closed wrap. Considered publications:
German Patent Nos. 960 071, 1077 575, 703; German Auslegeschrift No. 1123 955;
British Patent No. 257,333;
U.S. Patent No. 3,136,253. 1 sheet of drawings 709 720/146 1.68 © Bundesdruckerei Berlin