DE7618487U1 - SPIRAL SHOCK IGNITION - Google Patents

Description

/ Swirl projectile fuze

Fuzes for gun ammunition usually contain a detonator fuse with a starting delay element when firing, which arming a certain predetermined time in the the projectile is in the gun barrel is delayed. According to the current safety requirements for this ammunition the fuse are exposed to two independent external forces, usually in the axial or radial direction. This delay in arming the detonator fuse has the purpose of an unintentional creation in an area in which own troops may be located, or in which the terrain is designed in such a way that no effect can be achieved, i.e. within the so-called delay block section or mask, to prevent.

Adenauerallee 28 Won (040) 24 97 37 / 21'406S " Deutsche-Ba rft AG.BLZ 200: 70000 Postscheck Hamburg, BLZ 20010020

Hamburg 1 Telex 2? 62 830apli. * I " X <mioW3.4 / 3Xll72". . ' Account no. 384 73-201

P.O. Box 102905 Telegram Aplic HamburJ ".. • S.WlFT. ₁ , Code IJE (JT JJE I3H (accounts under Dres. Harmsen and Utescher)

aplic *

Determined for detonators with such detonator fuses

the safety requirement that the delay time between

a lower and an upper limit value so that the | ^J

Shooting is ensured that on the one hand the delay |

set distance a minimum |

distance from the gun location and on the other hand |

the detonator at the latest at the moment when the projectile |

on its path a fixed ζ for the so-called mask

outer limit happens, is armed. |

Up to now, a device has been used to test such limit values, |

that sets the detonator fuse in rotation and the |

Process that triggers arming during actual shooting, I.

in such a way that the time required for arming I

can measure. In addition, however, shooting attempts must be made I

to substantiate the measurement results. The previously applied |

Method which is suitable for percussion fuses is shown by |

schematically Fig. 1 of the accompanying drawing. H

In front of the weapon 11, at the predetermined limits |

S. and S of the delay sentence path two to serve ff

min max ³ ^ H

ignition suitable targets 12, 13 erected. Bullets, |

those with detonators with detonators of the discussed here |

Art are provided and from a supplied and in the pre | named device were taken from the tested batch, are now on,. I.

shot down the targets, using the | Detonations can determine whether the delay element in the detonator
works properly or not. The detonation takes place
at the target 13, the delay time is clear
within the established limits. However, when the detonation
occurs when passing through the target 12 or both
If this point of the projectile trajectory as well as at the target 13 is missing, the arming system of the detonator is defective. Whether in
in the latter case, however, the detonator fuse or earthly

other part has failed can hardly be seen in attempted shooting I.

determine. |

This selective test method has several disadvantages, which are based on the fact that only two cases are involved in the individual shots, namely creping or no creping at one of the points 12, 13 of the projectile trajectory, and does not know when or at what distance from the gun the delay element expired and the projectile armed. It can therefore also cannot determine how long the delay time is or whether it varies from lot to lot. When you get to a certain Match the margin in relation to the distance value S. want to tabulate or examine the spread of the delay time, you have to carry out time-consuming and laborious attempts at shooting with numerous shots and thereby the distance between the weapon and of the disc in question, which is to trigger the creping, vary.

In addition, after such attempts at shooting, numerous duds remain away from the shooting targets on the firing range lie. Since their handling and defusing is known to be associated with great dangers, a test procedure is therefore required, in which every projectile fired dies, regardless of whether the specified limit values have been complied with or not, so that the number of duds in shooting attempts is reduced to a minimum.

The present innovation, which in particular, but not exclusively, to check the delayed arming of detonators provided detonators for gun ammunition, has the task of creating improved devices that make it possible the delay time corresponding to the actual shooting or the corresponding distance (delay set distance) determine. The aim is to get a clear indication of the fact that the detonator really is with every shot fired is armed in flight and to record exactly how well the real delay time corresponds to the target delay time. In addition, the method and the device should of course comply with the high safety standards currently in force.

requirements for products of this type.

These tasks are modeled on in the claims specified features solved.

The innovation is explained below with reference to the drawing, the embodiment corresponding to the innovation in FIGS. 2 to 7 the device shows, explained in more detail.

Bs show:

2 shows a longitudinal section through a test igniter,

Fig. 3

and FIG. 4 cross section along the section line III - III

of Fig. 2 with the detonator fuse in

Start and end position _f

Fig. 5 is a circuit diagram of the ignition circuit of the test igniter,

FIG. 6 shows a partial longitudinal section similar to FIG. 2,

where the safety contact belonging to the ignition circuit is closed, and

FIG. 7 shows a cross section along the section line VII-VII in FIG. 6.

The fuze housing 14 of FIG. 2, which can be inserted into an opening of the projectile with a lower sleeve-shaped extension 15 in the usual manner, contains a charge 16 which causes the projectile to creep when it is ignited. In front of the charge there is a cylindrical chamber 17 in attachment 15 which can accommodate the test object intended for functional testing of the detonator - in the present case a detonator fuse 18 with a built-in delay element.

In front of this chamber 17, the detonator housing 14 contains a chamber 19 connected to the chamber 17, in which is located immediately above an electrically ignitable explosive cartridge 20 with a single-pole connection 21 in a concentric position to the test object 18 is located. The chamber 19 is forward of the fuze tip

22 completed, which is threaded with the igniter housing 14

23 is connected. The profile of one thread part is more spray-angled than the profile of the other thread part. By the resulting play is given a certain amount to the fuse tip 22, which can be made from solid metal axial mobility with respect to the rest of the fuse. The game is denoted by S in the figure.

The chamber 19 contains an electrical ignition device 24 with a piezoelectric element 25 or another comparable Energy source that is normally free of energy and prevents unintentional triggering of the Zimdvorrichtuna, but with an external force generates the required ignition current. In the embodiment of FIG. 2, the element 25 is as a ring is formed which lies between two electrode plates 26 near the lower surface 28 of the igniter pipe 22. The ring-shaped Element 25 is separated from igniter tip 22 only by an insulating disk 29 and rests in a seat which is also insulating 30th

The upper electrode 26, which in the diagram of FIG. 5 with + is designated, is on one pole 32 of the safety contact 31, which is inserted in an insulator 33, the the other pole 34 of the safety contact 31 connected to connection 21 for the explosive cartridge 20 is also supported.

The casing of the explosive cartridge 20 is electrically connected to the test device 18 and to the test device via the housing 14 associated moving parts.

The electrode 26 is also connected to the input of a diode 35, which on the output side is connected to the lower electrode 27 of the piezo element 25 and a contact strip 36 on the inside of a plastic sleeve inserted into the chamber 17 37 is connected. The contact strip 36 is arranged at such a level that a to the mechanism of the measurement object 18 associated locking pin 38, which in a radial plane through a lateral opening of the test object (Fig. 3) to the outside is movable, when the measuring object 18 is inserted into the chamber 17, the contact strip 36 is just opposite. Through this, that the contact strip 36 surrounds the measurement object, the contact function is independent of the rotational position in which the Said opening and the locking pin are located when inserting the test object 18.

The safety contact 31 has a metal ball as a closing element 39, which are inserted into a radial recess 40 of the insulator 33 is used and is normally located on the inside of a locking bolt 41, which is in a known manner from the Spring 42 is held in the front interlocking position so that poles 32 and 34 of contact 31 are not bridged can be. Only when the projectile is fired and the bolt 41 is pushed back by the axial force, the Ball 39 released so that they assume their contact-closing position (Fig. 6) as a result of the centrifugal force now occurring can. As soon as it has left its guide bore 43, the upper, thinner part of the bolt 41 tilts radially outward and hooks then fixed at the lower edge of the guide hole 43 so that the

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outward movement of the metal ball 39 cannot be hindered by the bolt 41 even when the axial force decreases and the spring 42 seeks to return the bolt 41.

The mode of operation of the detonator fuse 18 chosen as an example of a test object is shown in FIGS. 3 and 4 evident. The fuse 18 consists of a fixed part 44 and one mounted about an axis 46 of the fixed part 44 Rotor 45. The rotor 45 contains a bore 47 which is directed radially with respect to the axis 46 and in which the locking pin 38 is used movably. The rotor 45 also contains a detonator 48, which is in the initial position shown in FIG. 3 assumes an eccentric position in relation to the center line of the detonator. In the remainder of the part 44 is located centrally under the explosive cartridge 20 an opening. At a real impact fuse is triggered in the event of an unintentional impact on, for example, a bush in front of the weapon, A pilot flame or the like is passed along this center line. Here prevents the rotor 45, as long as it has not rotated into its end position shown in Fig. 4, that the pilot flame continues through the safety device and reaches the load 16.

By a non-illustrated Äiiialsperre, which basically works in the same way as the bolt 41 on the safety contact, the rotor 45 is when the projectile is fired unlocked so that it is rotated counterclockwise about axis 46 by centrifugal force as a result of its mass distribution until its movement is blocked by a pin 49 when the detonator 48 is in the center of the detonator and the detonator is armed. The arming movement is caused by a "restlessness" (not shown) or a similar

decelerator inhibited, so that one can with relatively high accuracy the time required to arm, and therefore the projectile distance - the delay sentence distance - in which the Safety device is intended to prevent crap, can determine.

The fact that the arming has taken place can be seen from the outside of the locking pin 39 from the safety device described here. which has now been pushed out of its bore 47 and prevents the rotor 45 from moving back in its new position. If the detonator fuse and the detonator are in a fired rotating projectile, so the locking pin 38 is held in the new position by centrifugal force and presses against the contact strip 36, since more "Vcift 38 the gap 50 between the measurement object and the contact strip 36 bridged.

During the test procedure according to the innovation, the Bündkreis works as follows: It is assumed that a test detonator, whose parts occupy the position shown in Fig. 2 to 3, were built into a projectile and this by a gun or a comparable weapon is fired. In the barrel phase, the movable mass 22 becomes the scale pushed back against the igniter housing 14, the play 6 eliminated and the piezo element 25 as a result of the surface 28 force exerted is somewhat compressed. This creates a voltage between the electrode plates 26, 27, the Direction corresponds to the plus sign of FIG. 5 and is therefore directly short-circuited by the diode 35. The ignition circuit is therefore energy-free as long as the projectile is in the gun barrel: During the same phase there is a safety contact closed in the manner described above. The Ab-

III Il I II

Firing the projectile also has the consequence that the detonator fuse 18 begins the arming movement.

When the projectile reaches the muzzle of the gun barrel and its acceleration ceases, the movable mass 22 of the detonator is advanced so that the previously compressed element 25 can expand. Now there is an opposite current pulse that is no longer closed by the Ysrzqe.- diode. Her new current pulse therefore charges the element 25, the electrodes of which act as a capacitor. As soon as the locking pin 38 of the security system then touches the contact strip 36, energy is discharged via the cartridge 20.

This discharge has the consequence that at the same moment, in which the arming movement of the test object is completed, the detonator causes a trajectory creep. Since this Can easily indicate creping on the firing range, one can determine whether the creping is between those specified in FIG Limit values p. and G takes place or not.

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The result can be through recording on film or through registration of the sound from the gun and the creping can be documented so that the delay time can be determined. During the exam Cardboard discs can be placed along the critical section of the projectile trajectory to intercept splinters.

Claims (2)

1. spinning projectile fuze ■ defining, rotatable with the Vorrohrsicherheitszeit 'by firing forces in an arming end position, the rotor is provided with a projecting Ansatuz, characterized by a functional test, serving additional provided with electrical energy source (25, 35) and the squib (20) firing device ( Fig. 5), which as a switch the radially protruding extension (38) of the rotor (45) as a movable contact and on the stationary wall surrounding the rotor (45) in front of the extension (38) of the rotor (45) in the arming position occupied place a stationary insulated contact (36) is used. 2. Twist projectile fuse according to claim 1, characterized in that the insulated contact (36) an the inner wall of the Cylindrical metal strip (36) covering the chamber (17) of the rotor (45) and backed by a plastic sleeve (37) is. Adenauerallee 28 Telephone (040) 24 97 57/24 = φ $ 5 * D ^ tsc h t ^ a pk AQ e.g. I ₁ -Z-Ee? 700 00 Posischeck Hamburg. BLZ 200 UDO Hamburg 1 Telex2162830apll /; ", Korjto-Nr? 34yp-7772 · _§ · Account number 38473-201 P.O. Box 10 2905 Telegram Aplic Hamburg · ,, · S.WI.FT-dodetfeÜT bE'fiH (accounts under Dres. Harmsen and Utescher) aplic *