ES237814A1 - New automatic speargun (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

New automatic rifle characterized in that it comprises four original devices, the first of which is a device for braking the recoil of the weapon and force to activate, automatically, the locking and unblocking of the closure of the bore, and consists of hitting the barrel or tube of the weapon and arranged in a same section perpendicular to the axis of said tube several holes inclined in the direction of forming acute angle with the back, that is toward the stock. The distance of these holes to the cylinder head plane will be fixed according to the gas outlet pressure through these holes, as desired. A brake part in the form of a solid of revolution, having: a cylindrical part, then another truncated cone and then another trunk-conical, but with the opposite conicity to the previous one, it can move along the tube of the barrel guided by its inner part cylindrical, which will rub against the outside of said tube. The first frustoconical part is placed in front of the drills and the common diameter of the small base of the trunks of cones is somewhat higher than the outside of the tube of the barrel in that part; this gap is fixed according to the speed at which it is desired that the gases coming from the bore of the barrel and that have passed through said boreholes go out through it. The cylindrical part, which is the guide of the sliding of this piece through the tube, is provided with a projection in which the end of a rod arranged in a position parallel to the axis of the weapon is fixed, and backwards, that is towards the stock; this rod can only move axially, the amount needed for automatic operation. The described piece, when subjected to the pressure of the gases of the projection load of the bullet, once the firing has started and when the pellet of said bullet has passed through the section in which the drills are made, allows them to come out by the annular nozzle which is the gap already exposed, between it and the tube; this makes it propelled forward and with it the whole weapon, if the rod does not allow it to move, but if it were not like that, it would shoot forward on its own and if the rod allows a certain path, this will be the one will do, taking with him said rod and then through the repeated rod pulls the weapon forward. In the exposed form, there is the force that pulls the rod that acts on the automatic and also slows the recoil of the weapon. (Machine-translation by Google Translate, not legally binding)