CH650329A5 - Practice round for firing from guns - Google Patents

Description

The present invention relates to a practice bullet to secure the coat, are rear and front in this

for projecting from guns with a sharp gene protruding ribs which are due to the art

shot appropriate flight and accuracy behavior. elasticity can be dimensioned so that the core is firm

For shooting exercises on guns it has so far been enclosed and held by the jacket in many cases.

has been common to use a defused normal munitioh This is also important so that it does not belong to the. Above all, disadvantages of an economic nature are relative movement between the shell and the core.

connected, because these projectiles can be made of high-quality material, which is due to the high number of revolutions of the fly

are manufactured with high precision, as it would not be necessary for the projectiles to warm up and thus soften them for training purposes. _ 40 of the plastic jacket would lead, whereby its shape

It has also been suggested that exercise stability would be compromised. But that would not be a

to produce shots from materials that give a more economical producible ballistic behavior more.

Allow manufacturing. Such a design is, for example, in order to achieve the dimensional stability of the plastic jacket.

For example, in Austrian Patent Specification No. 208 266, it expediently has a thickness of 5 to 10 mm, which is a metal practice bullet for small caliber 45. On the one hand, this thickness is sufficient for the plastic

other insert tubes describes. It is also known from the fabric materials for the required mechanical stability

DE-OS 26 39 884 a practice floor made of a metal body and on the other hand leaves enough volume for the core.

per and a detonator replacement piece attached to the top, rig, which is used for weight and focus

that can be made of plastic. a sharp bullet.

These two known practice grenades have one thing in common, so While it is possible to coat the jacket in one piece around the core, that they are made up of metal parts, the surface of which is free to spray, it is generally more expedient to have it in two parts. As a result, it is necessary to design this exposed surface so that the two jacket parts are machined separately, exactly as with a sharp projectile, so that the jacket parts are enclosed, and the core then achieves the required ballistic properties before connecting the ballistic properties becomes. The connection between the gun barrel and on the other hand the gun barrel is not damaged 55 by a thread. Such practice projectiles can usually also be snap-fit or welded, used only once, since they are at least damaged in order to achieve the play-free holding of the core in the jacket. Chen, it is appropriate if the tip of the coat as

There are also so-called decay bullets, in which detonator replacement pieces are built, which have become known as a cavity with, for example, rapid-fire guns, which have ribs pointing to their center. These ribs

have a plastic jacket, in which cores from the pressed arrangement has proven to be particularly advantageous, around which metal powder are arranged. Such decay bullets relative movements between the core mentioned above and are only used for shooting and not for target practice and are intended to prevent the sheath, since their radial arrangement particularly well suppresses a relative rotation of the core as soon as possible after exiting the gun barrel,

burst. According to this task, the 65 Um is required for the desired ballistic behavior

Plastic sheath is relatively thin, so that it remains under the external profile of the training floor even during the action of the centrifugal force after exiting from the flight, it is expedient if the rip

Gun barrel can tear open. in the center of the one provided in the fuse replacement piece

3rd

650 329

Unite cavity. This provides mutual support for the ribs, which increases the strength of the igniter replacement piece.

It is expedient if the rib protruding from the jacket at the rear is annular. This achieves a uniform, concentric pressing of the core within the jacket of the training floor. In addition, the formation of this annular rib is also advantageous because it can simultaneously serve to receive a thread in which a flight stabilizer can be fastened. Such a flight stabilizer corresponds to that of a sharp projectile and consists of a tube from which wings protrude at the rear.

In an effort to achieve a particularly even weight distribution of the exercise floor, it is possible to

that the jacket has centering ribs along the side for the core. This makes it possible to compensate for smaller irregularities in the core surface, so that processing costs for the core can be saved.

The invention is explained in more detail below by way of example with reference to the drawing:

1 shows a longitudinal section and FIG. 2 shows a cross section through an exercise floor according to the invention.

The practice floor shown in FIG. 1 has a jacket 2, 2 'made of plastic and a core 3 made of metal. The tip of the jacket 2, 2 'is designed as an igniter replacement piece 7. The detonator replacement piece 7 has radial ribs 5 which hold the valve in front.

The jacket is formed from two parts 2, 2 'which are screwed together. In part 2 ', an annular rib 6 is formed at the rear, which serves to fix the core 3 in this area. A thread is provided in the rib 6, which is used to screw in a flight stabilizer 15.

5 For attaching the target display mechanism 4, the core 3 has a concentric bore 9. In this an insertion part, preferably made of plastic, is attached, from the front to the back successively a primer 10, a firing pin 11, which attaches to a coil spring 12 and contains a target display primer 13. In order to avoid unintentional firing of the target display detonator 13 when handling the practice bullet, a locking pin 14 is provided for holding the firing pin 11. This locking pin 14 is simply guided through a corresponding cylindrical bore through the jacket 2, 2 'and core 3.

The jacket of the practice floor 1 is made of polyamide and has a thickness of about 7 to 8 mm, whereby in the case of the two-part design, an increase in the wall thickness in the area of the screw connection is advantageous. In principle, the jacket can also be made of other plastics, e.g. Polyvinyl chloride, high-pressure polyethylene or the like. exist that have the required mechanical properties, especially 25 in terms of dimensional stability and impact resistance.

2 shows a section through the practice floor 1 along the plane A, A '. This section shows the fuse replacement piece 7, which represents the tip of the jacket 2. Ribs 8 are arranged in star shape in the fuse replacement piece 7.

C.

1 sheet of drawings

Claims (7)

650 329 2 PATENTAN SPEECHES The present invention has now become a practice 1. Practice floor for firing from artillery with bullet for firing from artillery with a sharp flight and target projectile corresponding to a sharp projectile flight and target accuracy behavior behavior, characterized in that it is a task that is economically producible, protects the gun barrel, which remains dimensionally stable during launch and flight, shows a precise ballistic element (2,2 ') made of plastic and a core arranged in it, and is at least partially reused (3) made of specifically heavy material with a built-in target - can. Indicator mechanism (4) contains which core (3) is achieved by rip-, which according to the invention is achieved by a practice floor and protrudes inwards from the jacket (2,2 '), which keeps the shape stable during launch and flight (5,6 ) is kept free of play. io remaining sheath made of plastic and a 2. Practice projectile according to claim 1, characterized in that the core is made of a specific heavy material and that the casing (2,2 ') contains a thickness of 5 to 10 mm of the target display mechanism, which core has through. ribs protruding inwards from the coat at the back and front 3. Practice floor according to claim 1 or 2, thereby being kept free of play. indicates that the jacket (2,2 ') is in two parts. 15 As a result of such training, 4. Practice bullet according to one of claims 1 to 3, therefore, preserves the gun barrel, since this is only characterized by the fact that the tip of the jacket (2) is constructed as a plastic fuse of the practice bullet in the contact piece of Zünd fuse (7) that comes with a cavity. Because the jacket is dimensionally stable, it can have ribs (5) pointing towards its center. there is no expansion under the action of centrifugal forces 5. Practice projectile according to claim 4, characterized by the fact that the ballistic behavior is impaired, characterized in that the ribs (5) are located in the center of the igniter. The shape of the casing is also provided as a replacement piece (7) Unite cavity. supported by that it encloses the core without play and 6. Practice floor according to one of claims 1 to 5, so that it can be supported on it. In order to locate the practice bullet projecting from the jacket (2 ') at the back, a target-indicating rib (6) is ring-shaped in the core. 25 mechanism built in, e.g. when hitting a pyro- 7. Practice floor according to one of claims 1 to 6, technical igniter ignites. The plastic sheath is characterized by the fact that the sheath (2, 2 ') destroys the zen side when it hits it, while the core has the given ribs for the core (3). if it can also be made up of several parts, it can be reused for the production of a further training floor. In order to arrange the core in the