SE442441B - DAMBLE TICKET FOR RECOVERY WEAPON - Google Patents

Description

15 20 25 30 35 810ö869-0 Known bottom trays usually consist of gunsni, plastic, bakelite, paper laminate etc., relatively defective material. However, none of these materials exhibits all of the above properties.

Although these properties have long been known in tempered glass, it has not hitherto been considered possible to propose the use of this material in dams, especially in view of the fact that glass can hardly be expected to be sufficiently resistant to withstand the initial pressure that the propellant charge builds up in the combustion nozzle. Tempered glass has therefore so far only been proposed as a material in, for example, movable countermasses, etc., which of the combustion gases of the propellant charge are forced out through the rear part of the barrel, where they split into a stop, see for example U.S. Pat. No. 4,132,148. On the other hand, it has not been considered meaningful to propose glass as a material in a dam which is clamped in a combustion window, which in the clamped state must withstand a certain initial pressure and then split.

DESCRIPTION OF THE INVENTION The present invention is now based on the surprising discovery that tempered glass, contrary to accepted theories, can also be used as a material in clamped dam washers.

DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with reference to the drawing where a preferred embodiment of the dam washer according to the invention is shown in two different contexts, namely in figure 1, where the washer forms a bottom part of a cartridge case included in a recoil-free weapon. 2, where the washer is clamped in the barrel of a recoilless weapon, which is intended for sleeveless ammunition.

PREFERRED EMBODIMENT Figure 1 schematically shows a recoilless weapon of conventional type, comprising a barrel 1, in which a projectile 2 is inserted in a charging position. The projectile 2 is fixed in a cartridge sleeve 3, which in a known manner encloses a propellant charge 10 and a firing charge 5, which is arranged to be initiated from the side of a firing device 6. The rear wall of the sleeve 3, which is fixed clamped in the sleeve 3, constitute a partition washer 7, which according to the invention consists of tempered glass.

Figure 2 schematically shows a recoilless weapon of conventional type, comprising a barrel 11, in which a sleeveless projectile 12 is inserted in a charging position. Once the projectile 12 is present, there is a gas-tight closed combustion chamber, which is limited forwards by the projectile 12, to the sides of the barrel 11 and to the rear by a dam 17 of tempered glass fixed in the barrel. Arranged in the combustion chamber are a propellant charge 14 and a firing charge 15, which is intended to be ignited from the side of a conventional firing device 16.

The various components included in the recoilless weapon and in the ammunition are of a conventional type and, apart from the dam washer, do not form part of the present invention. It has therefore been considered sufficient with the above-mentioned schematic description thereof.

Claims (1)

Claim Damage washer (7, 17), which forms a clamped, rear wall in a combustion chamber in a recoilless weapon barrel (II) or in the cartridge case (3) of ammunition inserted into the barrel, which wall is the dimen - ionized to burst at a predetermined gas pressure in the combustion chamber and thereby allow gas outflow from the combustion chamber backwards through the fire tube, characterized in that the dam washer (7, 17) consists of tempered glass. whereby during rupture it gives rise to harmless splinters, which accompany the gas out of the barrel.