IL28076A - Practice ammunition - Google Patents

Description

Practice NOBEL Gi26623 2 This invention relates to practice such The properties are desirably as similar as possible to those of corresponding live but the range of the projectile has to be reduced to such an and the danger region to be so that the practice ammunition can be used without danger even in a practicing field of small It has already been proposed to use practice projectiles made of synthetic This design achieves a considerable reduction of the energy and range of the projectile but cartridges fitted with such a projectile have different properties those of the corresponding live Especially in the use of automatic weapons it is necessary to provide special locks or to at the end of the devices which sufficiently choke the propellant gases and thU3 create a gas pressure sufficient for the recoil of the The invention has the object to provide practice ammunition with a projectile which does not have the aforesaid drawbacks and wherein the projectile is designed as a tubular The invention consists in practice ammunition comprising a tubular projectile whose front end is terminated by a surface perpendicular to the axis of the a pointed head with a rearward extending stem for insertion in the front end of the and a plug for insertion in the rear end of the which plug has a rim readily destructible by the impact of gases at the time of in order to allow the plug to be driven forwards through the projectile by the firing gaees and thereby to expel the stem of the head from the By the pointed head the shape of the practice ammunition is assimilated to that of live The head as well as the rear plug may consist of moulded synthetic Differently from the shape of live ammunition the tubular projectile minus the pointed head and the rear may have a substantially conical taper at its front that the projectile can be designed as a body of revolution of most simple The weight as well as the range of the projectile can varied within wide limits by the appropriate selection of the width of the axial bore of the This may for to about or of the of the In any only that fraction of the energy of the propellant powder ponding to the solid of the projectile is utilized while the fraction corresponding to the width of the bore remains The projectile can also be its range be by a roughening of the inner surface of the projectile within the axial of propellant powder through the bore of the projectile are avoided by the rear The rim of the off or broken by the pressure of the 4 propellent gases when the weapon is whereby the plug is driven through the bore and thereby dislocates and expels the pointed The invention is by way of example in the accompanying drawings in 1 is an axial section of a projectile conically tapered at both 2 shows similarly the projectile according to 1 provided with a and is an axial section of the projectile of 1 provided with head and rear projectile according to 1 has a cylindrical body 1 with a thoroughgoing cylindrical axial bore Its ends t 4 are conically either at different angles and with different lengths as shown in or at equal angles and equal or even with the rear end longer than the front The front end of the cylindrical body is terminated by a front face 11 perpendicular to the axis of the As shown in 2 a head is made integrally with a 6 and the latter is stuck into the front end of the bore 2 with a tight The head is conical and completes the tapering front end of the jectile 1 so as to make it similar in shape to a live A plug 7 is inserted into the rear end of the projectile body It is made integrally with a rim 8 which bears against the rear face of the projectile body 5 When the weapon is fired the pressure of the propellant gases readily breaks or shears off the S and the plug 7 is then pushed through the bore 2 until it hits the stem 6 of the head 5 and expels the latter so that the projectile 1 shoots towards the target by without the head and rear The projectile according to is sealed at its rear end by a plug 10 made integrally with a wards extending cup In the transition between the cup 9 and plug 10 a weak zone is provided which is readily breakable by the action cf the propellant When this happens the plug 10 is forced through the bore 2 front hits the stem 6 of the head and expels it frontwards with the same result as in the case of In all cases the speed of the projectile is considerably reduced by the relatively broad front face 11 of the well as by the bore whereby the range of the projectile decreased to a short 6 insufficientOCRQuality

Claims (4)

1.6.66 1. Practice ammunition comprising a tubular projectile for underlined passages whose front end is terminated by a surface perpendicular to the axis of the projectile; a pointed head with a rearward extending stem for insertion in the front end of the end projectile; and a plug for insertion in the rear/of the projectile, which plug has a rim readily destructible by the impact of the gases at the time of firing, in order to allow the plug to be driven forwards through the projectile by the firing gases and thereby to expel the stem of the head from the projectile.

2. Practice ammunition according to Claim 1, wherein the hollow cylindrical body is conically tapered at its front and/or rear end.

1.6.66 3. Practice ammunition according to Claims 1 or 2, wherein the rim of the rear plug merges into a rearwards extending cup, and an easily breakable zone is provided in the transition between the plug and cup.

4. Practice ammunition substantially as described and illustrated in the accompanying drawings. For the Applicants DR. RKIKIiQLD jZGtfil PARTNERS By: RC/rb