EP0676613A1 - Patrone mit Geschoss mit kurtzer Reichweite - Google Patents

Patrone mit Geschoss mit kurtzer Reichweite Download PDF

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Publication number
EP0676613A1
EP0676613A1 EP95400452A EP95400452A EP0676613A1 EP 0676613 A1 EP0676613 A1 EP 0676613A1 EP 95400452 A EP95400452 A EP 95400452A EP 95400452 A EP95400452 A EP 95400452A EP 0676613 A1 EP0676613 A1 EP 0676613A1
Authority
EP
European Patent Office
Prior art keywords
projectile
cavity
hollow body
counterweight
cartridge according
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP95400452A
Other languages
English (en)
French (fr)
Inventor
Jean-Pierre Denis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0676613A1 publication Critical patent/EP0676613A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B8/00—Practice or training ammunition
    • F42B8/12—Projectiles or missiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements

Definitions

  • the present invention relates to a projectile cartridge with limited range, in particular for a training cartridge for exercise shots.
  • the present invention aims to remedy these drawbacks and proposes to create a cartridge with a reduced range having excellent precision and good efficiency at reduced range and very quickly becoming harmless beyond this reduced range and in particular a cartridge of training, in particular a training cartridge having the aspect and the characteristics of shooting of a real bullet, from the point of view of the stability on its trajectory and the quality of the impact on the target while avoiding the disadvantages of the risk in a very long area of terrain behind the target or allowing close interventions without creating risk at a certain distance.
  • the cartridge according to the invention allows very precise firing at a short or relatively short distance because the projectile has excellent stability on its trajectory at relatively short distance.
  • the projectile being very strongly braked, at the end of this first part of the trajectory, it quickly becomes harmless.
  • This second part of the trajectory is that located behind the target or the objective in the event of close fire, for example a neutralization fire, without the projectile becoming dangerous for people who could be at a certain distance.
  • a cartridge according to the invention serving as an exercise cartridge it and its projectile have the appearance and even a shape identical to that of a live-fire cartridge.
  • the projectile stabilizes on its trajectory, as a live fire projectile and the impact in the target is perfectly clear; the projectile generally consisting of a cylindrical piece longer than the diameter of its section, retains its position and pierces the target at impact like a live fire projectile allowing effective control of the marksman's qualities.
  • the projectile contains a more or less large flyweight but which represents only a fraction of the weight of the actual projectile.
  • the total mass of the projectile of reduced range representing only a fraction of that of the real projectile, for example 15g against 32g, this makes it possible to significantly reduce the charge of powder of the cartridge. This translates into significant savings.
  • the barrel of the weapon is less stressed which reduces wear and in turn results in significant savings, not to mention the reduction of pollution and noise.
  • the counterweight is formed by a guide rod held in the cavity, parallel to the axis of the cavity between the front and the rear and receiving, freely sliding, a ring whose mass represents most of the flyweight.
  • the counterweight being free to move in the cavity of the hollow body, a cavity which occupies almost the entire volume of the hollow body, the body in fact constituting only an envelope with the appropriate external shape (for example with sealing rings, a skirt at the rear and a plug closing the rear), this counterweight being able to move freely, at the start of the blow it is pressed against the bottom of the projectile due to the thrust exerted by the gases on the projectile.
  • the counterweight In its path in the barrel, the counterweight receives its kinetic energy via the hollow body then at the exit of the barrel as soon as the hollow body is braked by the air, the counterweight is placed in front of the hollow body and pull it on its trajectory. This results in an excellent stability of the projectile on its trajectory because the center of gravity of the projectile is moved completely to the front.
  • the projectile cartridge of limited range which is only shown schematically in the upper part of its socket A charged with the adequate quantity of powder, comprises a projectile B.
  • the projectile B consists of a hollow body 1, made of plastic and having the shape of a live fire projectile; this form is a cylinder provided externally with rings or sealing segments, not shown, and at the rear of a skirt 2 surrounding the plug 3 which closes the cavity 4 of the hollow body 1.
  • the cavity 4 contains a weight 5 of low weight forming with the hollow body 1, a projectile of reduced mass. This means that the mass is very reduced, for example by 50% and less compared to the mass of a usual projectile.
  • the volume of the counterweight 5 is also lower than that of the cavity so as to occupy only a part, generally relatively small, of the volume of the cavity; this counterweight here consists of a certain quantity of metal balls, for example lead balls.
  • This flyweight 5 or its constituent parts have dimensions such that they can move freely inside the cavity 4.
  • This cavity 4 is moreover generally of circular cylindrical shape and corresponds to most of the hollow body 1.
  • the counterweight 5 is free to move in the cavity 4. In the vertical position shown in FIG. 1, the counterweight 5 is accumulated at the bottom of the cavity 4.
  • the counterweight 5 occupies the position shown in FIG. 1, at the rear of the cavity 4, against the plug 3.
  • the hollow body (outside) is braked by its penetration into the air while the counterweight 5 is not; it immediately advances to press against the front of the hollow body and due to its kinetic energy it tends to "pull" the projectile. This ensures excellent stabilization of the projectile on its trajectory.
  • the projectile described above has the appearance of a conventional projectile of which only the mass is reduced.
  • the precision of the shooting is also equivalent to that of a usual projectile, limited however to a reduced range. Beyond this range, the speed of the projectile decreases very quickly which makes it practically harmless beyond this range.
  • the projectile does not damage or destroy the installations behind or around the target, by ricochet or because of a bad trajectory.
  • the projectiles thus fired can be recovered.
  • the danger area around the area of operation, whether it is a firing load or a street intervention, is also very small.
  • the choice weight material will be made depending on the result to be obtained on impact; a plastic weight will be practically harmless, a lead weight will spread over a hard objective and a lead alloy weight will burst or puncture the objective.
  • FIG 2 shows an alternative embodiment. This variant is identical to the embodiment of Figure 1 by the hollow body 1. Only the counterweight is different.
  • This flyweight is formed here by a ball 5A of spherical shape or similar to the spherical shape and whose largest dimension is less than the section of the cavity 4 so that this ball 5A can circulate freely inside the cavity 4 , forward or backward.
  • this projectile is the same as that described above.
  • the ball (flyweight) 5A is applied against the bottom of the hollow body. Then when the projectile leaves the barrel, it is immediately braked while the flyweight 5A is not. It advances and is pressed against the front of the hollow body to "pull" it on its trajectory.
  • FIG. 3 shows a variant of the embodiment of FIG. 2.
  • a counterweight 5B made of a relatively malleable material such as lead
  • FIG. 4 shows another embodiment of the front end 41B of the hollow body 1, in dome shape in which the masselootte 5B is housed, spherical in shape.
  • FIG. 5 shows the deformation of the damping part 6 at the time of the firing, before the ball has again moved towards the front of the cavity 4.
  • FIG. 6 shows another embodiment of the invention.
  • the counterweight 5C is formed of two parts 51, 52: - Part 51 corresponding to the flyweight itself and part 52 constituting its guide.
  • the guide rod 52 is a rod placed between the front 41 of the cavity 4 and the plug 3C.
  • the latter (3C) comprises a housing 31 for centering receiving the tail 521 of the guide rod 52 whose tip 521 is placed in the housing formed by the front 41.
  • Part 51 is a ring fitted on the guide rod 52.
  • This ring 51 is the heaviest part of the assembly 51/52; its dimensions are such that the ring 51 can move forward and backward freely in the cavity without being retained either by the rod 52 or by the friction on the wall of the cavity 4.
  • Various materials are possible for the assembly 51/52.
  • the rod 52 can for example be made of a plastic; the ring 51 can preferably be made of a denser plastic than that of the rod 52 or of metal, such as lead or a lead alloy.
  • this projectile is the same as that of the embodiments previously described: - at the start of the stroke, the ring 51 is pressed against the bottom (plug 3C) then as the hollow body is braked by air, the ring advances on the rod 52 and "pulls" the projectile by its kinetic energy.
  • FIG. 7 shows a variant of the front 41D of the embodiment of FIG. 6.
  • the front 41C is hollow with a stabilization groove 42 which further improves the trajectory of the projectile while serving for the central part 43 to receive and hold the guide rod 53.
  • This rod 53 receives the movable part 54 of the counterweight 5D.
  • This mobile part 54 comprises, with unchanged mass, a cylindrical skirt 55 which extends it and facilitates its guiding on the internal surface of the hollow body 1.
  • the inertia opposed by the counterweight (5, 5A, 5B, 5C, 5D) at the start of the blow causes a certain crushing of the bottom (3, 3C) itself subjected to the action of hot gases under pressure.
  • This crushing causes a slight expansion of the hollow body favoring its sealing with respect to the wall of the barrel, which at equal reach makes it possible to reduce the powder charge while ensuring better precision.
  • the mass represented by the counterweight 5, 5A either in the form of small balls 5 (FIG. 1) or in the form of a single ball 5A or another form 5B, 5C, 5D only represents a very small fraction of the weight of the actual metallic projectile placed in a hollow plastic body for projectile shots (bullets) with smooth cannons.
  • the powder charge placed in the cartridge case is determined according to the objectives, the nature of the shot to be made and the weight of the projectile; it is significantly reduced compared to that of conventional projectiles, both those used for training and those used for close-up actions.
  • the manufacture of cartridges according to the invention does not present any particular difficulties.
  • the hollow body is preferably the hollow body used for projectiles with unlimited range and the parts placed in the cavity of the hollow body have a simple geometry easy to produce to place in the hollow body.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Toys (AREA)
EP95400452A 1994-03-08 1995-03-02 Patrone mit Geschoss mit kurtzer Reichweite Withdrawn EP0676613A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9402658A FR2717258B1 (fr) 1994-03-08 1994-03-08 Cartouche à projectile de portée limitée.
FR9402658 1994-03-08

Publications (1)

Publication Number Publication Date
EP0676613A1 true EP0676613A1 (de) 1995-10-11

Family

ID=9460801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400452A Withdrawn EP0676613A1 (de) 1994-03-08 1995-03-02 Patrone mit Geschoss mit kurtzer Reichweite

Country Status (2)

Country Link
EP (1) EP0676613A1 (de)
FR (1) FR2717258B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3117177A4 (de) * 2014-03-10 2018-03-14 Nostromo Holdings, LLC Patrone mit induzierter instabilität bei einem voreingestellten bereich
US9952024B2 (en) 2014-03-10 2018-04-24 Nostromo Holdings, Llc Ammunition cartridge with induced instability at a pre-set range
CN115111972A (zh) * 2022-08-30 2022-09-27 中国空气动力研究与发展中心设备设计与测试技术研究所 一种用于高速入水弹体的自助式气膜减阻装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2160621A1 (de) * 1971-12-07 1973-06-14 Eta Corp Geschoss, insbesondere artillerie- oder raketengeschoss
DE2350596A1 (de) * 1973-10-09 1979-10-25 Messerschmitt Boelkow Blohm Infanteriegeschoss
DE3335997A1 (de) * 1983-10-04 1985-04-11 Rheinmetall GmbH, 4000 Düsseldorf Uebungsgeschoss

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2160621A1 (de) * 1971-12-07 1973-06-14 Eta Corp Geschoss, insbesondere artillerie- oder raketengeschoss
DE2350596A1 (de) * 1973-10-09 1979-10-25 Messerschmitt Boelkow Blohm Infanteriegeschoss
DE3335997A1 (de) * 1983-10-04 1985-04-11 Rheinmetall GmbH, 4000 Düsseldorf Uebungsgeschoss

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3117177A4 (de) * 2014-03-10 2018-03-14 Nostromo Holdings, LLC Patrone mit induzierter instabilität bei einem voreingestellten bereich
US9952024B2 (en) 2014-03-10 2018-04-24 Nostromo Holdings, Llc Ammunition cartridge with induced instability at a pre-set range
CN115111972A (zh) * 2022-08-30 2022-09-27 中国空气动力研究与发展中心设备设计与测试技术研究所 一种用于高速入水弹体的自助式气膜减阻装置

Also Published As

Publication number Publication date
FR2717258A1 (fr) 1995-09-15
FR2717258B1 (fr) 1997-04-18

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