WO2004070308A2 - Arme a feu a chambre de mise a feu supplementaire - Google Patents

Arme a feu a chambre de mise a feu supplementaire Download PDF

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Publication number
WO2004070308A2
WO2004070308A2 PCT/IB2004/000540 IB2004000540W WO2004070308A2 WO 2004070308 A2 WO2004070308 A2 WO 2004070308A2 IB 2004000540 W IB2004000540 W IB 2004000540W WO 2004070308 A2 WO2004070308 A2 WO 2004070308A2
Authority
WO
WIPO (PCT)
Prior art keywords
cartridge
firearm
barrel
firing chamber
shooting
Prior art date
Application number
PCT/IB2004/000540
Other languages
English (en)
Italian (it)
Other versions
WO2004070308A3 (fr
Inventor
Salvatore Tedde
Original Assignee
Salvatore Tedde
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Salvatore Tedde filed Critical Salvatore Tedde
Publication of WO2004070308A2 publication Critical patent/WO2004070308A2/fr
Publication of WO2004070308A3 publication Critical patent/WO2004070308A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A1/00—Missile propulsion characterised by the use of explosive or combustible propellant charges
    • F41A1/02—Hypervelocity missile propulsion using successive means for increasing the propulsive force, e.g. using successively initiated propellant charges arranged along the barrel length; Multistage missile propulsion

Definitions

  • the present invention relates to the firearms field and more specifically to an improvement relative to firearms of any type, such as heavy artillery, rifles and carabines, in order to increase the values of gaseous pressure produced due to combustion of the propelling charge.
  • firearms of any type such as heavy artillery, rifles and carabines
  • a drastic increase is obtained in the velocity at which the projectile leaves the barrel of the weapon, as this speed is proportional to the magnitude and duration of the pressure producing the propulsive thrust on the projectile.
  • Known firearms are commonly characterized by the use of ammunition composed of cartridges comprising a casing containing gunpowder and closed at the front by the projectile. To date, the development of ammunition and firearms has reached such levels that, although desirable, any further increase in their ballistic performance is progressively more arduous and difficult to achieve.
  • the highly compressed gases exert their propulsive action by releasing the projectile from the neck of the casing and accelerating it along the barrel of the firearm.
  • the main object of the present invention is to extend the duration of the action of the pressure that thrusts the projectile traveling along the barrel of the firearm, in order to obtain increased muzzle velocity, increased range, a considerable increase in precision on the target, and a tremendous increase in kinetic energy (proportional to the squared velocity) and in the resulting impact power.
  • the invention is particularly suitable for cannons of any size and for rifles which, however, as shall become more apparent below, is preferably of the manually loaded type, that is neither automatic nor semi-automatic.
  • the firearm is provided with a supplementary device, the auxiliary chamber, the use of which allows a synergic effect to be obtained between the customary first propulsive explosion and at least a second propulsive explosion that takes place subsequently, although very close in time, to the first one.
  • the first explosion is produced as usual by the principal cartridge carrying the projectile, while the subsequent explosion is produced by a supplementary cartridge without a projectile, that is a "blank" cartridge, which is located in the supplementary or auxiliary firing chamber communicating with the barrel of the firearm, and which is primed automatically through the action of combustion gases produced by the principal cartridge.
  • the objects were obtained by means of a process to shoot a projectile implemented by means of a firearm as described previously, having the features of claim 12. According to a further aspect of the invention the objects were obtained by means of a firing cartridge utilizable by the firearm as described above and having the features of claim 14.
  • Figure 1 shows a sectional view of a portion of firearm barrel and of the relative supplementary firing chamber in a first embodiment of the invention
  • Figure 2A is a cross section of the barrel along the plane A-A in Figure 1 ;
  • Figure 2B is a side view of the blanking screw of the supplementary -firing chamber
  • Figure 3 schematically shows the projectile, in the phase immediately after the explosion of its cartridge, while it is traveling the initial stretch of the barrel under the thrust of the combustion gases;
  • Figure 4 schematically shows the phase in which the combustion gases enter the supplementary firing chamber and abruptly push the blank cartridge backwards
  • Figure 5 is a diagram showing the trend of the propulsion pressures of the projectile while it is traveling along the barrel of the firearm;
  • Figure 6 shows a second embodiment of the invention, provided with two supplementary firing chambers;
  • Figure 7 represents a section in an axial plane of a cartridge conforming to the invention before use
  • Figure 7a represents a side view of a detail of the cartridge of Figure 7
  • Figure 8 represents a section in an axial plane of the cartridge of Figure 7 after use
  • Figure 9 represents a section in an axial plane of the cartridge of Figure 7 in a phase of pre-assembly
  • Figure 9a represents a front view of the cartridge of Figure 9. Detailed description of preferred embodiments
  • the firearm of the invention comprises at least one supplementary firing chamber 2, which communicates with the bore of the barrel 1 of the firearm by means of at least a few communication holes.
  • a first embodiment of the firearm shown in Figures 1 to 4, it comprises a single supplementary firing chamber and the barrel 1 of the firearm is positioned side by side with a supplementary firing chamber 2, which is preferably disposed with its axis parallel, or slightly inclined, in relation to the longitudinal axis of the barrel and communicates with said barrel by means of one or more holes 3 provided at its front end.
  • the rifling of the bore of the barrel 1 is indicated with the reference 1b.
  • the holes 3 are facing the inside of the barrel of the firearm, in an area located below the principal firing chamber, so that the bullet transits in the point in which the holes 3 are located after having traveled along a short stretch of the barrel 1, so that a small part of the gases produced by combustion of a principal cartridge 7, provided with projectile, enters the second firing chamber 2 with pressure values that are still extremely high.
  • the supplementary firing chamber 2 is fixed integrally with the barrel 1 by means of a strong weld 1a, or with other appropriate fixing means.
  • the supplementary or auxiliary firing chamber 2 is preferably disposed in the area in front of the principal firing chamber, that is towards the muzzle of the barrel 1.
  • the screw may be tightened or loosened with suitable means provided for the purpose.
  • the velocity with which combustion of the second charge takes place is twice the speed of the charge in the primary cartridge 7, the propellant contained in the supplementary cartridge 4, in fact, is ignited starting from the two ends of the cartridge: the first ignition is caused, as is known, by the blanking screw 5 striking the primer positioned at the base of the charge, while the second ignition is produced, essentially simultaneously to the first, by the incandescent gases 10 present in the area in front of the cartridge 4, coming into contact with the charge of said cartridge.
  • the rate of pressure that takes place behind the projectile determines a tremendous increase in the muzzle velocity and in the corresponding impact energy on the target.
  • the graph mentioned above shows that, advantageously, the supercharge energy does not cause any increase in pressure structurally damaging for the firearm, as said energy acts on the projectile already moving at high speed, that is to say when it has already moved beyond the most critical phases of propulsion, which are initial acceleration of the frictions resulting from its travel through the helical riflings 1b of the barrel 1.
  • the curve 13 of the supercharge pressure does not overlap the curve 12 of the primary pressure, but extends consecutively to it.
  • the propulsive energy produced by explosion of the supplementary cartridge 4 maintains the pressure of. the gases that thrust the projectile close to its maximum value essentially constantly for almost the entire travel of the bullet along the barrel 1 of the firearm.
  • the supplementary cartridge 4, containing a large quantity and high quality of gunpowder is capable of producing large increases in pressure energy.
  • a second embodiment of the invention shows the barrel 1 of a firearm provided with two supplementary firing chambers 2 positioned side by side and converging on the single barrel 1, which act simultaneously with their supplementary propulsive action.
  • two supplementary firing chambers 2 in tandem or on either side of the barrel, both communicating with a single barrel 1 at different distances from the primary cartridge 7, which act sequentially (not shown in the figures).
  • a cartridge is produced with the characteristics described below and shown in Figures 7 to 9a.
  • the auxiliary blank cartridge 4a has optimal performance with respect to known blank cartridges.
  • the capsule has a cylindrically shaped body or casing closed at a first end, which forms the bottom, and a capsule 9 which forms the apex at the second end.
  • the capsule has a closure 9a in the shape of a star, viewed from the front.
  • This closure 9a is preferably made of plastic or metal material.
  • the embodiment with folds and stress raisers facilitates its tearing or opening at the moment in which the propellant 15 explodes.
  • the capsule 9 is fitted during assembly to the mouth of the casing 4, i.e. by clamping, or with any appropriate fixing means which in any case allows limited sliding through the action of strong pressure exerted on it.
  • a raised rim 4c is produced inside the casing at a specific distance from the second end; this may be a step or abutment, which acts as a stop for the capsule 9.
  • a priming explosive mixture is disposed, preferably in the shape of a ring .
  • a priming capsule 14 disposed in a known way in the bottom of the casing is a priming capsule 14.
  • the blank cartridge 4a encases a specific quantity of propellant 5, gunpowder of a known type.
  • the operating mode of the cartridge 4a is now described.
  • the cartridge 4a is inserted during the loading procedure of the firearm into the auxiliary firing chamber 2 previously blanked by the screw 5 or by another appropriate mechanism.
  • pressurized gases are produced by the gunpowder contained in the primary cartridge 7. These gases, at high pressure, accelerate the projectile in the usual way inside the firing chamber of the barrel 1 and it moves at high speed along the barrel towards the muzzle.
  • a quota of the propulsion gases at extremely high pressure enters the firing chamber 2 determining a sudden increase in the pressure inside it.
  • this pressure causes the cartridge 4a to undergo violent backward movement towards the firing pin 5a, which is integral with the blanking screw. T ie impact of the firing pin 5a against the primer capsule 14, automatically causes ignition of the explosive charge 15 inside the cartridge 4a. Simultaneously, the same pressure also provides a violent thrust to the capsule 9 that changes into a relative translatory movement between the body of the casing and the capsule. This second movement causes the priming explosive mixture disposed in the shape of a ring to be pressed against the stepped edge 4c. Priming of this ring causes ignition of the propellant in the surrounding area, which catches fire. In this way the propellant 15 is ignited starting from the two ends of the cartridge 4a.
  • the capsule 9b is open, the ring 11 of priming explosive has disappeared and the propellant 15 has completely disappeared from the inside of the cartridge 4a.
  • the projectile receives an impulse that is extremely strong, resulting from the sum of several impulses, with a corresponding increase in kinetic energy with a greater impact to that of known firearms.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)

Abstract

L'invention concerne une arme à feu destinée au lancement de projectiles par effet synergique d'une explosion propulsive produite par une cartouche principale (7), et d'une seconde explosion qui a lieu immédiatement après la première, et qui est produite par une cartouche à blanc supplémentaire (4) prévue dans une chambre à feu supplémentaire (2) communiquant avec le canon (1) de l'arme à feu au moyen de trous de connexion (3). La seconde explosion est amorcée automatiquement sous l'action des gaz de combustion produits par la cartouche principale (7).
PCT/IB2004/000540 2003-02-10 2004-02-10 Arme a feu a chambre de mise a feu supplementaire WO2004070308A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2003A000054 2003-02-10
IT000054A ITRM20030054A1 (it) 2003-02-10 2003-02-10 Arma da fuoco con almeno una camera di scoppio

Publications (2)

Publication Number Publication Date
WO2004070308A2 true WO2004070308A2 (fr) 2004-08-19
WO2004070308A3 WO2004070308A3 (fr) 2004-11-25

Family

ID=29765651

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/000540 WO2004070308A2 (fr) 2003-02-10 2004-02-10 Arme a feu a chambre de mise a feu supplementaire

Country Status (2)

Country Link
IT (1) ITRM20030054A1 (fr)
WO (1) WO2004070308A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006077251A1 (fr) 2005-01-21 2006-07-27 Salvatore Tedde Cartouche d'arme a feu
WO2009043876A2 (fr) * 2007-10-01 2009-04-09 Salvatore Tedde Cartouche pour une arme à feu

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB164697A (en) * 1920-06-10 1921-09-22 Chevalier Gervasio Gentini New type of cannon with high initial velocity
DE583174C (de) * 1932-02-18 1933-08-30 Sempert & Krieghoff Einlaeufige Handfeuerwaffe mit in Nebenkammern angeordneten Beiladungen
FR862334A (fr) * 1939-12-22 1941-03-04 Procédé et bouche à feu pour propulser un projectile
US2360217A (en) * 1941-06-20 1944-10-10 Francis Louis Multicharge gun
GB1018410A (en) * 1963-04-11 1966-01-26 Gevelot Sa Improvements in or relating to cartridges
US20020195017A1 (en) * 2001-06-11 2002-12-26 Danko Priimak Reverse ignition cartridge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB164697A (en) * 1920-06-10 1921-09-22 Chevalier Gervasio Gentini New type of cannon with high initial velocity
DE583174C (de) * 1932-02-18 1933-08-30 Sempert & Krieghoff Einlaeufige Handfeuerwaffe mit in Nebenkammern angeordneten Beiladungen
FR862334A (fr) * 1939-12-22 1941-03-04 Procédé et bouche à feu pour propulser un projectile
US2360217A (en) * 1941-06-20 1944-10-10 Francis Louis Multicharge gun
GB1018410A (en) * 1963-04-11 1966-01-26 Gevelot Sa Improvements in or relating to cartridges
US20020195017A1 (en) * 2001-06-11 2002-12-26 Danko Priimak Reverse ignition cartridge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006077251A1 (fr) 2005-01-21 2006-07-27 Salvatore Tedde Cartouche d'arme a feu
WO2009043876A2 (fr) * 2007-10-01 2009-04-09 Salvatore Tedde Cartouche pour une arme à feu
WO2009043876A3 (fr) * 2007-10-01 2009-06-11 Salvatore Tedde Cartouche pour une arme à feu
US8122828B2 (en) 2007-10-01 2012-02-28 Salvatore Tedde Cartridge for a firearm

Also Published As

Publication number Publication date
ITRM20030054A1 (it) 2004-08-11
WO2004070308A3 (fr) 2004-11-25
ITRM20030054A0 (it) 2003-02-10

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