IL29671A - Barrel-end or muzzle assembly for smoothbore fin-stabilised projectile - Google Patents

Description

OR MUZZLE ASSEMBLY FOR FIN STABILISED PROJECTILE nsp The invention relates to the design of a barrel extension or a muzzle particularly for rifled especially for the barrels or grenade launchers and the Various types of muzzle assemblies on rifled barrels fo firearms are structures are provided with radial openings of a greater or lesser and having a larger inner diameter than the in muzzle assemblies the disposition of the openings for the explosive gases is so formed that the gases are to a greater or lesser extent deflected The object of the invention is to make a barrel end or muzzle especially for by means which the passage of the projectile can be beneficially The is characterised according to the invention in that radial openings are provided in the barrel the assembly on the inner circumference of the or muzzle having an identical inner corresponding to the The openings can be formed as this instance the series of grooves can be the openings can be formed as slots passing through the barrel or the In this way considerable influence can be exercised on the trajectory of the in that its ballistic features are As long as the projectile is still in the the gas pressure behind the projectile 1 lessens as a result of the openings or holes in the or The gases can escape before the projectile has emerged from the In previous mebodiments of the barrels of launchers and the the gases can still exert an influence on the When the latter receives no further guidance from it comes in the design according to the that the still guides the and yet the gases are considerably Any disadvantages jet gases can affect the projectile when it is already free of the is The openings o holes An the and the like are so distributed that contact of the projectile or its assembly is maintained with the barrel up to the In the case of running longitudinally to the some fins of the are always in contact with the inner wall of the or The desig according to the invention of the and the like leads to an increased stabilising effect the barrel on the The accuracy of the weapon considerably On the accuracy is twice as great as The itself subject to less the stability is The or reduction exclusion of the jet directly at the barrel mouth means that the projectile ca higher muzzle resulting in a longer the named design of the end or causes a quieter has the advantage of making it more difficult to discover the site of the weapon from the According to a further feature of the the are preferably arranged at an inclination running at an acute angle to the direction of flight of the this way the explosive gases can escape undisturbed in the effective Turbulence and thereby sources of loss are The construction of the muzzle assembly with oblique outlet slots is preferably done by the assembly of a number of annular discs alternating with a larger number of and outlet slots for the explosive gases in the direction of the projectile trajectory are the construction is characterised by its The inner diameter of the annular discs should correspond to the inner diameter of the the annular discs can be assembled into a of discs with the in fact between a and a Connection is by anchor bolts passing through the In this way one a muzzle assembly made up of many single as a unit which can be attached as a whole part to of the mortar or the So that the discs are locked a can be passed the To this the holes in the discs designed to contain the anchor bolts can be provided with radial openings into which the locking running parallel to the anchor is Such a muzzle assembly meets all the demands required of as a compact pp Several exemplary embodiments of the subject matter of the invention are shown in the drawing 1 and 2 show an embodiment with oblique in longitudinal section and plan Here 1 shows a section along lines of and 2 partly a plan view and partly a section on of 3 and 4 show another embodiment in longitudinal section and in plan view or in partial according to the embodiment in 1 and In the example Figs 1 and 2 the muzzle assembly 2c has radial which are arranged at an acute angle to the direction of flight 6 of the outwards and obliquely A large number of such slots 5 is preferably The explosive gases issuing from the barrel are deflected obliquely upwards and all by the limiting slots so that the gases are afforded clean and directed The withdrawal of the gases takes place in laminar fashion with a relatively smaller diversion from the in the the angular deflection of the slots lying the region of an acute angle to the The angle comes to about 45 for Dependent on the result the inclination of the slots can also be made slightly or slightly The muzzle assembly is constructed so that it has a large number of annular discs 7 which lie at the angle of inclination Distance discs 8 are provided between the annulet A made up of these discs is located between a 9 and a The whole is held together by so that a compact unit The assembly can be screwed on the thread 12 or barrel Disc 13 grips under the projecting part of the barrel The 11 are screwed tight by nuts The 8 are essentially of restricted dimensions and so that an abundant free space remains for the The discs 8 are formed as favourable to flow in their and are in essence So that the discs cannot position is fixed by a To this end a opening 16 is in each annular disc 7 and in each extending 15 through the said insufficientOCRQuality

Claims (4)

- I - Appln.No.29671 /£ which corresponds to the clear diameter of barrel 1. I tt^Ls way the muzzle assembly forms at the same time an extension of the barrel to guide the projectile. The surface of the outflow slots 7 becomes gradually greater with the forwards movement of the projectile, as more slot openings are released. The gases are radially directed outwards all round in quiet paths. In the embodiment in Figs. 3 and 4 distance-discs 17 have, at the outer end, extensions 18 which rim more or less parallel with the longitudinal axis of muasle assembly 2d in an arc. In this way the distance discs are locked on the anchor-bolts 11, so that the discs cannot twist round the axis of the anchor bolts. In this way automatic twist-prevention for the discs is achieved. Muzzle assembly 2d corresponds in its construction to assembly 2c of i'igs. 1 and 2. Attachment to barrel 1 can bo provided by means of a box nut 19, which is screwed in a corresponding way on the end of barrel 1 · C L A I M S .

1. Barrel-end, barrel-extension or assembly on barrels for smooth-bore, fin-stabilised projectiles of mortars, grenade launchers or the like, wherein at the inner circumference of said end or extension of the barrel or muzzle assembly a number of spaced annular discs (7) are so arranged as to create radial slot-like apertures characterised in that the aperture slots (5c,5d) are set at an inclination running at an acute angle to the trajectory (6) of the projectile and in that the inner diameter of the said discs corresponds to the inner are in a forward direction and alternate with flat distance-discs (8) which - seen in plan - have a drop-shaped contour.

2. Barrel-end, barrel-extension or assembly on barrels as claimed in claim 1, characterized in that the distance-discs (8) are secured in their position by locking rods (15).

3. Barrel-end, barrel extension or assembly on barrels as claimed in claim 2 characterised in that the holes in the discs (7,8) containing the anchor-bolts (11 ) are provided with radially-extending openings (16), in which the locking-rod (15) is inserted parallel to the anchor-bolt (11).

4. Barrel-end, barrel-extension or assembly on barrels as claimed in claim 1, char cterised in that the distance-discs (8) are provided at the outer end with extensions (18) running at an angle more or less parallel to the longitudinal axis* Tel-Aviv, March 21, 1968