FI58835B - ANORDNING VID EN OEVNINGSPATRON - Google Patents

Description

FSSF * 1 [B] (11) ANNOUNCEMENT CQQ7C

Ma LJ *; UTLÄCC N I NGSSKRI FT 30000 • C Patent granted 10 04 1581

Patent meddelat ^ ^ (51) K ».ik.3 / ii * t.a.3 F 42 B 5/22 SUOMI — FINLAND (21) Patent application - PttmtamMminf 762l8l (22) Hakamispilvt - AiwÖknlnpda | 30.07-76 (23) Starting point — Glkl | h «tsda (30.07-76 (41) Come] from outside« kil - Bllvlt ofr.ntllj 02.02.77

National Board of Patents and Registration .... _. . ,. .., \, (441 Nlhttvikilpanon ja moonL | ulkal * un pvm. -

Patent · och regiatantyralaan 'Ansttktn utltgd och iitl. «Kr! Ft« n published 31 · 12.80 (32) (33) (31) Fyydauy etuoikeus —Beftrd prloritet 01.08.7 5

Norway-Norway (NO) 752697 (71) Bakelittfabrikken A / S, Stanseveien k, Oslo 9, Norway & -Norge (NO) (72) Frank E. V ^ yum, Kolbotn, Tore D. Olsen, Nittedal, Norway-Norway ( The present invention relates to an arrangement for a training cartridge, which is mainly made of an active substance, in which such a training cartridge utilizes radially acting forces due to gunpowder gases in the opening of the cartridge. i.

It is an essential object of the invention to reduce the axial pulls inside the cartridge, as they are a significant cause of the plastic pieces and / or parts of the cartridge being torn off and thus being fired out of the weapon.

This object is solved according to the invention in that the projectile part is in the shape of a flattened truncated cone, so that it is more conical in the second axial plane than in the axial plane rotated 90 ° relative to it, while the cross-section of the inner portion of the projectile changes from And that the wall thickness of the projectile portion is substantially less at the ends of the longer axis of the cross-section of the cavity than at the flattened sides to form fracture zones between the flattened sides of the flattened cone and that the sleeve portion has a rough surface at least in the core portion.

2 58835

Because the outer dimensions of the cartridge are determined by the cartridge case of the weapon, changes in hard cartridges are limited to the smoothness of the surface of the cartridge and the outer and inner shape of the projectile.

The understanding of the invention will be facilitated by the following description relating to the drawing, in which Figure 1 shows an axial section of a projectile part, Figure 2 shows a cross-section along the line I I-I | , Fig. 3 shows the appearance of the projectile part illustrating opposite oblique surfaces, Fig. 3a shows the projectile part seen from the tip of the projectile, Fig. b shows an axial section of the projectile part in a plane perpendicular to the cutting plane of Fig. 1, and Fig. 5 shows the projectile part placed in the cartridge case and barrel.

As shown in Fig. 1, the projectile part is in the shape of a truncated cone in the axial plane. It can be seen from Figure 2 that the cavity of the projectile part has the shape of an ellipse printed slightly flat in cross-section. By means of this cross-sectional shape, two reinforced backs 1 are formed in the walls of the projectile part, which are located at the two opposite flattened oblique surfaces 2 of the projectile part, as best seen in Figures 3 and 3a.

Due to the shown shape of the projectile cavity, the gunpowder gases in use apply a relatively high pressure against the spines 1, which are then pressed against the barrel walls in the radial direction, as shown by arrows 3 in Figure 5. Due to radial attraction forces, the substance reaches projectile sides b located offset by 90 ° relative to the flattened oblique surfaces 2, the fracture limit at which the projectile part opens.

The flattened oblique surfaces 2 are essential because they provide space for the intended deformation when the projectile part opens in the barrel, and because the oblique surfaces at the same time give the ammunition part the required flexibility. The rough surface 5 of the conical sleeve also has a damping effect on the forces acting in the axial direction.

The tip of the projectile is designed for radial opening, thus avoiding axial loading.

V