EP1642082A1 - System for launching lightweight elements during festive events - Google Patents

System for launching lightweight elements during festive events

Info

Publication number
EP1642082A1
EP1642082A1 EP04767879A EP04767879A EP1642082A1 EP 1642082 A1 EP1642082 A1 EP 1642082A1 EP 04767879 A EP04767879 A EP 04767879A EP 04767879 A EP04767879 A EP 04767879A EP 1642082 A1 EP1642082 A1 EP 1642082A1
Authority
EP
European Patent Office
Prior art keywords
slide
opening
projection system
base
housing
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.)
Granted
Application number
EP04767879A
Other languages
German (de)
French (fr)
Other versions
EP1642082B1 (en
Inventor
Francesco Ambrico
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 EP1642082A1 publication Critical patent/EP1642082A1/en
Application granted granted Critical
Publication of EP1642082B1 publication Critical patent/EP1642082B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/70—Details not provided for in F41B11/50 or F41B11/60
    • F41B11/71—Electric or electronic control systems, e.g. for safety purposes
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H37/00—Jokes; Confetti, streamers, or other dance favours ; Cracker bonbons or the like
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H5/00—Musical or noise- producing devices for additional toy effects other than acoustical
    • A63H5/04—Pistols or machine guns operated without detonators; Crackers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/50—Magazines for compressed-gas guns; Arrangements for feeding or loading projectiles from magazines
    • F41B11/57—Electronic or electric systems for feeding or loading
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/60—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas
    • F41B11/62—Compressed-gas guns, e.g. air guns; Steam guns characterised by the supply of compressed gas with pressure supplied by a gas cartridge

Definitions

  • the present invention relates to a system for projecting light elements into the air, in particular paper or plastic, for example confetti or streamers, during festive events.
  • a projection system corresponds to the product marketed by Brezac .Artifices under the Kabuki brand.
  • Such a projection system consists of a base on which a compressed gas cartridge is fixed.
  • a tube containing the light elements to be projected into the air is mounted on the base so as to receive the gases supplied by the cartridge.
  • a striker which can be operated manually or automatically is suitable for piercing the cartridge. The released gases then spread in the tube and project the light elements into the air.
  • a disadvantage of such a projection system is that it is difficult to ensure, at each use, an optimal drilling of the cartridge.
  • the amplitude of the kinetic energy that can be transmitted to the striker to ensure the opening of the cartridge is generally limited.
  • the striker when the projection system is actuated manually, the striker is set in motion directly by a user, for example by pulling a string. The amplitude of the energy- transmitted to the striker is then limited by the energy that the user can develop.
  • the striker When the projection system is actuated automatically, the striker is generally connected to a spring, maintained in the compressed state by a locking means actuated by an electromagnet. The spring is released when the electromagnet receives a control signal.
  • the low mass of the striker and the space constraints limit the amplitude of the kinetic energy that can be transmitted to the striker.
  • the present invention aims to obtain a system for projecting light elements, using a compressed gas cartridge, improving the opening of the cartridge by the striker.
  • the present invention also aims to obtain a system for projecting light elements in which the replacement of the compressed gas cartridge is simple and rapid.
  • the present invention provides a system for projecting light elements into the air, comprising a housing connected to a reservoir containing the light elements and comprising an opening extending in a determined direction; a slide adapted to slide in the opening in the determined direction; a striker disposed in the opening and fixed relative to the housing; means for sliding the slide in the opening; means for locking the slide relative to the housing in a stopped position; a compressed gas cartridge adapted to be driven in sliding by the slide and, when the slide is locked in the stop position, to be thrown against the striker to be opened by the striker; and means for conducting the gases released when the cartridge is opened to the reservoir.
  • the projection system comprises an additional locking means of the slide relative to the housing in an arming position in which the slide is farther from the striker than in the stopped position ; and means for releasing the slide sliding in the opening from the cocking position.
  • the means for sliding the slide is a helical spring comprising a first end connected to the housing and a second end connected to the slide, the spring being compressed when the slide is in the position of arming and being adapted to relax to slide the slide between the arming position and the stop position.
  • the opening includes a shoulder for locking the slide in the stopped position.
  • the slide comprises a body and at least one reinforcement connected to the body by a tab extending in a determined direction, the opening comprising a shoulder adapted to receive the reinforcement to block the slide to the cocking position, the tab being deformable to release the reinforcement of the shoulder.
  • the system comprises a base disposed at one end of the opening, the striker being fixed to the base, the base comprising at least one protuberance adapted to cooperate with the slide to place the slides in the arming position.
  • the opening is cylindrical, the base being adapted to be pivoted relative to the housing from a first position in which the base prevents the sliding of the slide to a second position in which the slide is free to slide.
  • the reservoir is fixed to the base, said base comprising openings for the passage of the gases released when the cartridge is opened.
  • the housing comprises at least one flexible blade that can be actuated manually and is adapted to deform the tab to release the reinforcement from the shoulder.
  • the system comprises means for deforming the tab comprising a movable arm, one end of which is adapted to deform the tab and an electromagnet adapted to actuate the arm.
  • FIGS. 1 and 2 represent sections of the projection system according to the invention in two successive stages of the use of the projection system;
  • FIG. 3 represents an exploded view of elements of the projection system according to the invention;
  • Figures 4 and 5 show respectively a perspective view and a top view of an element of the projection system according to the invention;
  • Figures 6 and 7 respectively show an enlarged side view and top view of the striker of the projection system according to the invention;
  • FIGS. 8 and 9 respectively represent a side view and a partial front section of an automatic actuation device of the projection system according to the invention.
  • FIGS 1 to 5 show several views of a projection system 10 according to the invention.
  • the system of projection 10 comprises a cylindrical housing 12 traversed by a cylindrical opening 13 of axis D, closed by a plug 14 at one end and by a base 16 at the opposite end.
  • the axial length of the housing 12 is a few tens of centimeters and the internal radius of the housing 12 varies from a few centimeters to ten centimeters.
  • the base 16 comprises a base 17, obstructing the end of the housing 12, from which a cylindrical support 18 is projected along the axis D.
  • a tube 20, of which only a portion is shown in Figures 1 to 3, is fixed to the cylindrical support 18, for example by stapling or gluing, and extends along the axis D.
  • the tube 20 contains light elements, not shown, in particular in paper or plastic, for example confetti or streamers.
  • the tube 20 is advantageously made of cardboard, or of any material at low cost, which can easily tear under the action of an internal overpressure.
  • the cylindrical support 18 comprises a collar 21 which abuts against the housing 12.
  • An auxiliary cylindrical support 22 coaxial with the cylindrical support 18 and having a diameter less than the diameter of the cylindrical support 18 projects from the base 17.
  • the arrangement of the cylindrical supports 18, 22 allows the choice of mounting between one of the following tubes: the tube 20 said to be of large diameter mounted at the level of the outer lateral surface of larger diameter of the cylindrical support 18, a tube (not shown) said to be of intermediate diameter mounted between the cylindrical supports 18, 22 or a tube (not shown) of small diameter mounted at the inner lateral surface of smaller diameter of the cylindrical support 22.
  • the base 17 includes openings 26 allowing passage of gas between the opening 13 and the inside of the tube 20.
  • the base 17 comprises an opening 28 receiving a striker 30 which projects in relation to the share the 17 in the opening 13.
  • the base 17 is extended by a cylindrical wall 32 which projects along the axis D in the opening 13. As can be seen more clearly in FIG.
  • the cylindrical wall 32 has two protrusions 36, 38 arranged diametrically opposite on the exterior surface of the cylindrical wall 32.
  • Each protrusion 36 comprises two rectilinear portions 37A- 37B extending along 1 ' axis D and connected at the ends by two circular portions 37C, 37D.
  • the plug 14 comprises a bottom 40 obstructing the end of the housing 12 opposite the base 16.
  • a flange 42 facilitates the mounting of the plug 14 on the housing 12.
  • the plug 14 comprises a cylindrical portion 44 which projects from the bottom 40 in the opening 13 along the axis D.
  • a spiral spring 46 is placed in the opening 13. One end of the spring 46 bears against the bottom 40 of the plug 14, between the cylindrical portion 44 and the housing 12, the cylindrical portion 44 facilitating the centering of the spring 46.
  • a slide 48 is arranged in the housing 12 between the base 16 and the spring 46.
  • the slide 48 comprises a cylindrical body 50 which extends along the axis D and which is partially inserted in the spring 46.
  • the cylindrical body 50 comprises a cylindrical internal cavity 52 closed at one end by a bottom 54 and open at the opposite end.
  • the external diameter of the body 50 corresponds substantially to the internal diameter of the cylindrical wall 32 of the base 16.
  • the body 50 comprises in the middle part a collar 56 forming a shoulder 58 against which abuts one end of the spring 46.
  • Two legs 60 , 62 project from the collar 56, on the side of the collar 56 opposite the spring 46.
  • Each tab 60, 62 corresponds to a portion of a cylinder oriented along the axis of the housing 12.
  • a space 64, 66 is provided between each leg 60, 62 and the cylindrical body 50 for the passage of the cylindrical wall 32 of the base 16.
  • a reinforcement 68, 70 is disposed at the free end of each leg 60, 62.
  • the legs 60, 62 have a certain elasticity and are liable to deform under the action of a force transverse to the axis D.
  • a cylindrical cartridge 72 of compressed gas is disposed in the internal cavity 52 of the cylindrical body 50.
  • a fixing means can be provided to maintain the cartridge 72 in the internal cavity 52 in the absence of significant efforts so as, in particular, to maintain the cartridge 72 in the internal cavity 52 when the projection system 10 is oriented so that the free end of the tube 20 points to the ground.
  • the opening 13 of the housing 12 comprises a shoulder 76 on the side of the end close to the tube 20.
  • the opening 13 comprises two locking elements 78, 80, visible in FIGS. 4 and 5, having the shape of portions of arcs cylindrical which project from the internal surface of the housing 12 in a substantially diametrically opposite manner and which are arranged near the shoulder 76.
  • Each locking element 78, 80 has a stop 81 at one of the faces included in planes comprising the axis D (only one stop is visible in FIG. 4).
  • the stops 81 are arranged diametrically opposite.
  • the housing 12 comprises in the middle part two slots 82, 84 in the shape of a U arranged in a diametrically opposite manner and each delimiting a flexible strip 86, 88.
  • a recess 90, 92 is provided at the level of each tongue 86, 88 to facilitate its handling.
  • the opening 13 comprises a shoulder 93 disposed between the strips 86, 88 and the first shoulder 76 near the strips 86, 88.
  • the slide 48 is pressed into the opening 13 until the reinforcements 68, 70 of the legs 60, 62 come into contact with the shoulder 93 preventing the progression of the slide 48 further forward in the opening 13.
  • the orientation of the slide 48 relative to the housing 12 is imposed by means not shown so that, when the reinforcements 68, 70 of the slide 48 are in abutment against the shoulder 93, each reinforcement 68, 70 is substantially facing a strip 86, 88.
  • the insertion of the base 16 into the housing 12 is such that, during the rotation of the base 16, the protrusions 36, 38 and the base 16 sandwich the locking elements 78, 80 until the protrusions 36, 38 come into contact against the stops 81.
  • the projection system 10 is then substantially in the configuration shown in Figure 1.
  • the projection system 10 is said to be armed insofar as it is ready to be used.
  • the projection of the light elements contained in the tube 20 is obtained by exerting pressure simultaneously on the strips 86, 88, which slightly deform the legs 60, 62, causing the release of the reinforcements 68, 70 from the shoulder 93.
  • the spring 46 then relaxes violently and drives the slide 48 which moves axially in the direction of the base 16.
  • the slide 48 When the collar 56 of the slide 48 abuts against the shoulder 93, the slide 48 abruptly interrupts its travel.
  • the cartridge 72 is then projected against the striker 30.
  • the kinetic energy acquired by the cartridge 72 is sufficient to cause the opening of the cartridge 72 during the impact with the striker 30 and the release of the gases contained in the cartridge 72.
  • the cartridge 72 In reaction to shock, the cartridge 72 is thrown axially against the bottom 54 of the slide 48.
  • the gases then spread in the free part of the internal cavity 52 and pass through the openings 26 in the tube 20.
  • the overpressure resulting is sufficient to cause the expulsion of the light elements outside the tube 20.
  • the striker 30 is made of a sufficiently soft material so that the end of the striker 30 is dulled upon impact with the cartridge 72 so as to impose the change of the base 16 between two uses of the projection system 10.
  • the end of the tube 20 opposite the housing 12 is closed by a seal intended to be pierced by the overpressure present in the tube 20 during the release of the gases from the cartridge 72.
  • the Applicant has demonstrated that the projection of the light elements contained in the tube 20 takes place at a distance more important when the tube 20 is closed initially.
  • a small clearance is provided between the cylindrical body 50 of the slide 48 and the cylindrical wall 32 extending the base 17. This limits, during the opening of the cartridge 72, gas leaks between the cylindrical body 50 and the cylindrical wall 32, thus promoting the increase in pressure in the free part of the internal cavity 52 and accelerating the flow of gases through the openings 26 in the tube 20.
  • the auxiliary tube is plugged at the end opposite to the cylindrical support 22. The release of gas successively causes the drilling of the auxiliary tube then of the tube 20.
  • the Applicant has demonstrated that such a configuration allows the projection light elements at a greater distance than when using the single tube 20.
  • the projection system 10 is as shown in FIG. 2.
  • a user To reuse the projection system after opening a cartridge 72, a user must remove the tube 20 and the base 16, then remove the cartridge 72. The user then introduces a new cartridge 72 into the cavity 52 of the slide 48, then sets up a new base 16 at the end of the housing 12, the base 16 being generally already equipped with the tube 20.
  • the presence of the locking elements 78, 80 requires a determined orientation of the base 16 relative to the housing 12 when the base 16 is introduced into the housing 12 so that the protrusions 36 , 38 slide between the locking elements 78, 80 during the axial movement of the base 16.
  • Each protrusion 36, 38 then presses on a tab 60, 62 of the slide 48.
  • the depression of the base 16 then causes l insertion of the slide 48 dan s the tube 12 and compresses the spring 46 until the reinforcements 68, 70 engage in the shoulder 93 by deformation of the legs 60, 62, then blocking the slide 48 in axial translation.
  • the user then pivots the base 16 along the axis D until the protrusions 36, 38 abut against the stops 80, 82 of the locking elements 78, 80.
  • the projection system 10 is ready for new use .
  • the cartridge 72 in reaction to the impact between the cartridge 72 and the striker 30, the cartridge 72 is thrown axially against the bottom 54 of the slide 48 with sufficient force to cause the displacement of the slide 48 and compress the spring 46 until the reinforcements 68, 70 engage in the shoulder 93 by deformation of the legs 60, 62, then blocking the slide 48 in axial translation.
  • Such a variant therefore makes it possible to automatically rearm the projection system 10.
  • a user To reuse the projection system 10, a user must remove the tube 20 and the base 16, then remove the cartridge 72.
  • the projection system 10 is ready for new use.
  • the projection system 10 according to the present invention is designed so that a user must press simultaneously on the two strips 86, 88 to release the two reinforcements 68, 70 from the shoulder 93 and allow movement of the slide 48 This avoids accidental release of the slide 48 when the user inadvertently presses only on a strip 86, 88.
  • FIG. 6 and 7 show enlarged detail views of an exemplary embodiment of the striker 30.
  • the striker 30 comprises a cylindrical rod 94 inserted in the opening 28 for the fixing the striker 30 to the base 16.
  • the striker 30 includes a 95 tapered lead end separate from the stem
  • the angle at the top of the conical end 95 is, for example, about 2 degrees.
  • the 95 comprises a bevelled wall 97.
  • the angle formed between the bevelled wall 97 and the axis of the striker 30 is approximately 15 degrees.
  • a flat 98 extends over the conical end 94 from the bevelled wall 97 to the collar 96.
  • the collar comprises a recess 99 disposed on the face of the collar 96 perpendicular to the axis of the striker 30 and located on the side of the conical end 95.
  • the depression 99 extends from the flat 98 to the radial end of the collar 96.
  • FIGS. 8 and 9 show an automatic actuation device 100 of the projection system 10 according to the invention.
  • the automatic actuation device 100 comprises a casing 102, in which is disposed a manual projection system 10 as described above.
  • the plug 14 has a rounded shape.
  • a striated collar 114 is arranged around the housing 12 to facilitate gripping.
  • the casing 102 comprises a base 105 on which the plug 14 rests.
  • a rectilinear rib 106 extends over the wall 105 and cooperates with a groove 107 provided on the bottom 14 of the housing 12. The cooperation of the rib 106 and the groove 107 blocks the housing 12 in rotation relative to the casing 102.
  • the casing 102 is pivotally mounted on a base 108 by means of a pivot link 109. The inclination of the casing 102 relative to the base 108 defines the direction of projection of the light elements.
  • the casing 102 comprises two pivoting arms 110, 112 arranged in a substantially diametrically opposite manner relative to the housing 12 and each mounted for rotation in the middle part on a pivot 114, 116.
  • Each arm 110, 112 comprises at one end a bulge 118, 120 arranged opposite a strip 86, 88 of the housing 12.
  • An electromagnet 122 is disposed in the casing 102 and is controlled by a control circuit not shown.
  • a rod 124 is mounted to slide freely relative to the electromagnet 122 and is adapted to penetrate into the electromagnet 122 when the latter is traversed by a current.
  • a connecting rod 126, 128 connects the end of each arm 110, 112 opposite the bulge 118, 120 to the rod 124.
  • Each connecting rod 126, 128 is rotatably mounted on the arm 110, 112 and on the rod 124.
  • a return means places the rod 124 in a position where it is most removed from one electromagnet 122.
  • the connecting rods 126, 128 then rotate the arms 110, 112 so that the bulges 118, 120 are not in contact with the lamellae 86, 88 of the housing 12.
  • the control circuit supplies the electromagnet 122
  • the rod 124 enters the electromagnet magnet 122.
  • the connecting rods 126, 128, driven by the rod 124 rotate the pivoting arms 110, 112 so that each bulge 118, 120 presses against a strip 86, 88. This causes the slide 48 to be released from the projection system 10 as explained above.
  • the control circuit of the electromagnet 122 comprises a capacitor storing the energy necessary to supply the electromagnet 122, a power transformer disposed between the capacitor and the electromagnet 122, and a capacitor control circuit .
  • the casing 102 comprises an input socket 130 with three terminals 131, 132, 133.
  • a supply voltage for example of the order of 24 volts, is applied between the terminals 131 and 132 and allows charging of the capacitor of the control circuit of the electromagnet 112.
  • a control voltage of the control circuit is applied between the terminals 131 and 133 and supplies the control circuit of the capacitor to cause the discharge of the capacitor in 1 ' electromagnet 122.
  • a diode can be arranged at the casing 102 to indicate correct charging of the capacitor.
  • the casing 102 may include an outlet 135 making it possible to connect several automatic actuation devices 100 according to the invention in series.
  • the present invention has many advantages: First, the release of the slide 48 by a compression spring 46 makes it possible to develop significant forces favoring a greater opening of the cartridge 72 during the impact with the striker 30 thus resulting in better release of the gases contained in the cartridge 72 and therefore better projection of the light elements contained in the tube 20. In addition, the volume present in the internal cavity 52 of the slide 48 allows better expansion of the gases expelled from the cartridge 72 and promotes better projection of light elements. Secondly, since the compressed gas cartridge 72 is not fixed to the projection system, it can be replaced very quickly.
  • the operation of the light element projection system is very simple since it requires a simple pressure of the tabs 86, 88.
  • the present invention is susceptible to various variants and modifications which will appear to those skilled in the art. art.
  • the number and distribution of the OPEN ⁇ tures of the base plate allowing the passage of gases released by the cartridge depend on the dimensions of the cartridge and the tube containing the light elements to be projected.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Electrotherapy Devices (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

A system for projecting light elements in the air, including: a casing connected to a reservoir containing the light elements and including an opening extending along a determined direction; a slide capable of sliding in the opening along the determined direction; a striker arranged in the opening and fixed with respect to the casing; a spring for sliding the slide in the opening; a shoulder for blocking the slide with respect to the casing in a stop position; a compressed gas cartridge capable of being slid along with the slide and, when the slide is blocked in the stop position, of being projected against the striker to be opened by the striker; and a channel for leading the gases released on opening of the cartridge towards the reservoir.

Description

SYSTEME DE PROJECTION D'ELEMENTS LEGERS POUR EVENEMENTS FESTIFS SYSTEM FOR PROJECTING LIGHT ELEMENTS FOR FESTIVE EVENTS
La présente invention concerne un système de projection dans les airs d'éléments légers, notamment en papier ou en plastique, par exemple des confettis ou des serpentins, lors d'événements festifs. Un exemple de système de projection correspond au produit commercialisé par la société Brezac .Artifices sous la marque Kabuki. Un tel système de projection est constitué d'une embase sur laquelle est fixée une cartouche de gaz comprimé. Un tube contenant les éléments légers à projeter dans les airs est monté sur l'embase de façon à recevoir les gaz fournis par la cartouche. Un percuteur actionnable manuellement ou automatiquement est adapté à percer la cartouche. Les gaz libérés se répandent alors dans le tube et projettent les éléments légers dans les airs. Un inconvénient d'un tel système de projection est qu'il est difficile d'assurer, à chaque utilisation, un perçage optimal de la cartouche. En effet, l'amplitude de l'énergie cinétique pouvant être transmise au percuteur pour assurer l'ouverture de la cartouche est généralement limitée. En effet, lorsque le système de projection est actionné manuellement, le percuteur est mis en mouvement directement par un utilisateur, par exemple par la traction d'une ficelle. L'amplitude de l'énergie- transmise au percuteur est alors limitée par l'énergie que peut développer l'utilisateur. Lorsque le système de projection est actionné automatiquement, le percuteur est généralement relié à un ressort, maintenu à l'état comprimé par un moyen de blocage actionné par un électroaimant . Le ressort est libéré lorsque 1 ' électroaimant reçoit un signal de commande. Toutefois, la faible masse du percuteur et les contraintes d'encombrement limitent l'amplitude de l'énergie cinétique pouvant être transmise au percuteur. Un autre inconvénient d'un tel système de projection est que la cartouche de gaz comprimé est fixée à l'embase, par exemple par vissage. Il est donc nécessaire, entre deux utilisations du système de projection, de démonter la cartouche usagée et de monter à la place une nouvelle cartouche. De telles opérations de démontage et de montage requièrent généralement une durée non négligeable. La présente invention vise à obtenir un système de projection d'éléments légers, mettant en oeuvre une cartouche de gaz comprimé, améliorant l'ouverture de la cartouche par le percuteur . La présente invention vise également à obtenir un système de projection d'éléments légers dans lequel le remplacement de la cartouche de gaz comprimé est simple et rapide. Pour atteindre ces objets, la présente invention prévoit un système de projection d'éléments légers dans les airs, comprenant un boîtier relié à un réservoir contenant les éléments légers et comprenant une ouverture s 'étendant selon une direction déterminée ; une coulisse adaptée à coulisser dans l'ouverture selon la direction déterminée ; un percuteur disposé dans l'ouverture et fixe par rapport au boîtier ; un moyen pour faire coulisser la coulisse dans l'ouverture ; un moyen de blocage de la coulisse par rapport au boîtier dans une position d'arrêt ; une cartouche de gaz comprimé adaptée à être entraînée en coulissement par la coulisse et, lorsque la coulisse est bloquée à la position d'arrêt, à être projetée contre le percuteur pour être ouverte par le percuteur ; et un moyen pour conduire les gaz libérés lors de 1 ' ouverture de la cartouche vers le réservoir. Selon un mode de projection de l'invention, le système de projection comprend un moyen de blocage supplémentaire de la coulisse par rapport au boîtier dans une position d'armement à laquelle la coulisse est plus éloignée du percuteur qu'à la position d'arrêt ; et un moyen de libération de la coulisse en coulissement dans l'ouverture depuis la position d'armement. Selon un mode de projection de l'invention, le moyen pour faire coulisser la coulisse est un ressort hélicoïdal comprenant une première extrémité reliée au boîtier et une seconde extrémité reliée à la coulisse, le ressort étant comprimé lorsque la coulisse est dans la position d'armement et étant adapté à se détendre pour faire coulisser la coulisse entre la position d'armement et la position d'arrêt. Selon un mode de projection de l'invention, l'ouverture comprend un épaulement pour bloquer la coulisse dans la position d'arrêt. Selon un mode de projection de l'invention, la coulisse comprend un corps et au moins un renfort relié au corps par une patte s 'étendant dans une direction déterminée, l'ouverture comprenant un épaulement adaptée à recevoir le renfort pour bloquer la coulisse à la position d'armement, la patte étant déformable pour libérer le renfort de 1 'épaulement . Selon un mode de projection de 1 ' invention, le système comprend une embase disposée à une extrémité de l'ouverture, le percuteur étant fixé à l'embase, l'embase comprenant au moins une protubérance adaptée à coopérer avec la coulisse pour placer la coulisse dans la position d'armement. Selon un mode de projection de l'invention, l'ouverture est cylindrique, l'embase étant adaptée à être pivotée par rapport au boîtier depuis une première position dans laquelle l'embase empêche le coulissement de la coulisse jusqu'à une seconde position dans laquelle la coulisse est libre de coulisser. Selon un mode de projection de l'invention, le réservoir est fixé à l'embase, ladite embase comprenant des ouver- tures pour le passage des gaz libérés lors de l'ouverture de la cartouche . Selon un mode de projection de l'invention, le boîtier comprend au moins une lamelle souple actionnable manuellement adaptée à déformer la patte pour libérer le renfort de l'épau- lement . Selon un mode de projection de l'invention, le système comprend un moyen pour déformer la patte comportant un bras mobile dont une extrémité est adaptée à déformer la patte et un électro-aimant adapté à actionner le bras . Ces objets, caractéristiques et avantages, ainsi que d' autres de la présente invention seront exposés en détail dans la description suivante de modes de réalisation particuliers faite à titre non-limitatif en relation avec les figures jointes parmi lesquelles : les figures 1 et 2 représentent des coupes du système de projection selon l'invention à deux étapes successives de l'utilisation du système de projection ; la figure 3 représente une vue éclatée d'éléments du système de projection selon 1 ' invention ; les figures 4 et 5 représentent respectivement une vue en perspective et une vue de dessus d'un élément du système de projection selon l'invention ; les figures 6 et 7 représentent respectivement une vue de côté et de dessus agrandies du percuteur du système de projection selon l'invention ; et les figures 8 et 9 représentent respectivement une vue de côté et une coupe partielle de face d'un dispositif d'action- nement automatique du système de projection selon l'invention. Les figures 1 à 5 représentent plusieurs vues d'un système de projection 10 selon l'invention. Le système de projection 10 comprend un boîtier 12 cylindrique traversé par une ouverture 13 cylindrique d'axe D, fermée par un bouchon 14 à une extrémité et par une embase 16 à l'extrémité opposée. A titre d'exemple, la longueur axiale du boîtier 12 est de quelques dizaines de centimètres et le rayon intérieur du boîtier 12 varie de quelques centimètres à une dizaine de centimètres. L'embase 16 comprend un socle 17, obstruant l'extrémité du boîtier 12, duquel se projette un support cylindrique 18 selon l'axe D. Un tube 20, dont seule une portion est repré- sentée aux figures 1 à 3, est fixé au support cylindrique 18, par exemple par agrafage ou collage, et s'étend selon l'axe D. Le tube 20 contient des éléments légers, non représentés, notamment en papier ou en plastique, par exemple des confettis ou des serpentins. Le tube 20 est avantageusement réalisé en carton, ou en un matériau quelconque à bas coût de revient, pouvant facilement se déchirer sous l'action d'une surpression interne. Le support .cylindrique 18 comporte un collet 21 venant en butée contre le boîtier 12. Un support cylindrique auxiliaire 22 coaxial au support cylindrique 18 et ayant un diamètre inférieur au diamètre du support cylindrique 18 se projette depuis le socle 17. La disposition des supports cylindriques 18, 22 permet le choix de montage entre l'un des tubes suivants : le tube 20 dit de grand diamètre monté au niveau de la surface latérale extérieure de plus grand diamètre du support cylin- drique 18, un tube (non représenté) dit de diamètre intermédiaire monté entre les supports cylindriques 18, 22 ou un tube (non représenté) dit de petit diamètre monté au niveau de la surface latérale intérieure de plus petit diamètre du support cylindrique 22. Le socle 17 comprend des ouvertures 26 auto- risant le passage de gaz entre l'ouverture 13 et l'intérieur du tube 20. Le socle 17 comprend une ouverture 28 recevant un percuteur 30 qui se projette en saillie par rapport au socle 17 dans l'ouverture 13. Le socle 17 se prolonge par une paroi cylindrique 32 qui se projette selon l'axe D dans l'ouverture 13. Comme cela apparaît plus clairement en figure 3, la paroi cylindrique 32 comporte deux protubérances 36, 38 disposées de façon diamétralement opposée sur la surface extérieure de la paroi cylindrique 32. Chaque protubérance 36 comprend deux portions rectilignes 37A- 37B s 'étendant selon 1 ' axe D et reliées aux extrémités par deux portions circulaires 37C, 37D. Le bouchon 14 comprend un fond 40 obstruant l'extrémité du boîtier 12 opposée à l'embase 16. Un rebord 42 facilite le montage du bouchon 14 sur le boîtier 12. Le bouchon 14 comprend une portion cylindrique 44 qui se projette depuis le fond 40 dans l'ouverture 13 selon l'axe D. Un ressort à spirale 46 est disposé dans l'ouverture 13. Une extrémité du ressort 46 s'appuie contre le fond 40 du bouchon 14, entre la portion cylindrique 44 et le boîtier 12, la portion cylindrique 44 facilitant le centrage du ressort 46. Une coulisse 48 est disposée dans le boîtier 12 entre l'embase 16 et le ressort 46. La coulisse 48 comprend un corps cylindrique 50 qui s'étend selon l'axe D et qui est partiel- lement inséré dans le ressort 46. Le corps cylindrique 50 comprend une cavité interne cylindrique 52 fermée à une extrémité par un fond 54 et ouverte à l'extrémité opposée. Le diamètre extérieur du corps 50 correspond sensiblement au diamètre intérieur de la paroi cylindrique 32 de l'embase 16. Le corps 50 comprend en partie médiane un collet 56 formant un épaulement 58 contre lequel vient en appui une extrémité du ressort 46. Deux pattes 60, 62 se projettent depuis le collet 56, du côté du collet 56 opposé au ressort 46. Chaque patte 60, 62 correspond à une portion d'un cylindre orienté selon l'axe du boîtier 12. Un espace 64, 66 est prévu entre chaque patte 60, 62 et le corps cylindrique 50 pour le passage de la paroi cylindrique 32 de l'embase 16. Un renfort 68, 70 est disposé à l'extrémité libre de chaque patte 60, 62. Les pattes 60, 62 ont une certaine élasticité et sont susceptibles de se déformer sous l'action d'une force transversale à l'axe D. Une cartouche cylindrique 72 de gaz comprimé est disposée dans la cavité interne 52 du corps cylindrique 50. Un moyen de fixation peut être prévu pour maintenir la cartouche 72 dans la cavité interne 52 en l'absence d'efforts importants de façon, notamment, à maintenir la cartouche 72 dans la cavité interne 52 lorsque le système de projection 10 est orienté de façon que l'extrémité libre du tube 20 pointe vers le sol. L'ouverture 13 du boîtier 12 comprend un épaulement 76 du côté de l'extrémité proche du tube 20. L'ouverture 13 comprend deux éléments de blocage 78, 80, visibles aux figures 4 et 5, ayant la forme de portions d'arcs cylindriques qui se projettent depuis la surface interne du boîtier 12 de façon sensiblement diamétralement opposée et qui sont disposés à proximité de l' épaulement 76. L'angle vu depuis l'axe D dans lequel s'inscrit chaque élément de blocage 78, 80 est inférieur à 90°. Chaque élément de blocage 78, 80 comporte une butée 81 au niveau de l'une des faces incluses dans des plans comprenant l'axe D (seule une butée est visible en figure 4) . Les butées 81 sont disposées de façon diamétralement opposée. Le boîtier 12 comprend en partie médiane deux fentes 82, 84 en forme de U disposées de façon diamétralement opposée et délimitant chacune une lamelle souple 86, 88. Un évidement 90, 92 est prévu au niveau de chaque languette 86, 88 pour en faciliter la manipulation. L'ouverture 13 comprend un épaulement 93 disposé entre les lamelles 86, 88 et le premier épaulement 76 à proximité des lamelles 86, 88. Le montage initial du système de projection 10 selon la présente invention est réalisé de la façon suivante. Du côté de l'extrémité du boîtier 12 opposée à l' épaulement 76, on introduit successivement la coulisse 48, le ressort 46 et le bouchon 14. La coulisse 48 est enfoncée dans l'ouverture 13 jusqu'à ce que les renforts 68, 70 des pattes 60, 62 viennent en contact avec l' épaulement 93 empêchant la progression de la coulisse 48 plus en avant dans l'ouverture 13. L'orientation de la coulisse 48 par rapport au boîtier 12 est imposé par des moyens non représentés de façon que, lorsque les renforts 68, 70 de la coulisse 48 sont en butée contre l' épaulement 93, chaque renfort 68, 70 est sensiblement en vis-à-vis d'une lamelle 86, 88. Par l'extrémité opposée du boîtier 12, on introduit une cartouche 72 de gaz comprimé dans la cavité 52 de la coulisse 48, puis on referme le boîtier 12 par l'embase 16 à laquelle est préalablement fixé le tube 20 contenant les éléments légers. Une fois mise en place au niveau du boîtier 12, l'embase 16 est pivotée autour de l'axe D. L'enfoncement de l'embase 16 dans le boîtier 12 est tel que, lors de la rotation de l'embase 16, les protubérances 36, 38 et le socle 16 prennent en sandwich les éléments de blocage 78, 80 jusqu'à ce que les protubérances 36, 38 viennent en contact contre les butées 81. Le système de projection 10 est alors sensiblement dans la configuration représentée en figure 1. Le système de projection 10 est dit armé dans la mesure où il est prêt à être utilisé. La projection des éléments légers contenus dans le tube 20 est obtenue en exerçant une pression simultanément sur les lamelles 86, 88, qui déforment légèrement les pattes 60, 62, entraînant le dégagement des renforts 68, 70 de l' épaulement 93. Le ressort 46 se détend alors violemment et entraîne la coulisse 48 qui se déplace axialement en direction de l'embase 16. Lorsque le collet 56 de la coulisse 48 bute contre 1 'épaulement 93, la coulisse 48 interrompt brusquement sa course. La cartouche 72 est alors projetée contre le percuteur 30. L'énergie cinétique acquise par la cartouche 72 est suffisante pour provoquer l'ouverture de la cartouche 72 lors du choc avec le percuteur 30 et la libération des gaz contenus dans la cartouche 72. En réaction au choc, la cartouche 72 est projetée axialement contre le fond 54 de la coulisse 48. Les gaz se répandent alors dans la partie libre de la cavité interne 52 et passent à travers les ouvertures 26 dans le tube 20. La surpression résultante est suffisante pour provoquer l'expulsion des éléments légers à l'extérieur du tube 20. De façon avantageuse, le percuteur 30 est constitué d'un matériau suffisamment tendre pour que l'extrémité du percuteur 30 soit émoussée lors du choc avec la cartouche 72 de façon à imposer le changement de l'embase 16 entre deux utilisations du système de projection 10. Selon une variante de la présente invention, on dispose un matériau d'amortissement au niveau du fond 54 de la coulisse 48 pour éviter que la cartouche 72 ne s'encastre dans la coulisse 48 lors du contre-choc qui suit l'ouverture de la cartouche 72. Il est préférable que l'extrémité du tube 20 opposée au boîtier 12 soit fermée par un opercule destiné à être percé par la surpression présente dans le tube 20 lors de la libération des gaz de la cartouche 72. En effet, la demanderesse a mis en évidence que la projection des éléments légers contenus dans le tube 20 s'effectue à une distance plus importante lorsque le tube 20 est fermé initialement. De façon avantageuse, on prévoit un faible jeu entre le corps cylindrique 50 de la coulisse 48 et la paroi cylindrique 32 prolongeant le socle 17. Ceci limite, lors de l'ouverture de la cartouche 72, les fuites de gaz entre le corps cylindrique 50 et la paroi cylindrique 32, favorisant ainsi l'augmentation de pression dans la partie libre de la cavité interne 52 et accélérant l'écoulement des gaz à travers les ouvertures 26 dans le tube 20. Selon une variante de l'invention, on prévoit, outre le tube 20, un tube auxiliaire (non représenté) , disposé au niveau du support cylindrique 22 de l'embase 16, à l'intérieur du tube 20 et ne contenant pas d'éléments légers, les éléments légers étant prévus entre le tube 20 et le tube auxiliaire. Le tube auxiliaire est bouché à l'extrémité opposée au support cylindrique 22. La libération de gaz entraîne successivement le perçage du tube auxiliaire puis du tube 20. La demanderesse a mis en évidence qu'une telle configuration permet la projection des éléments légers à une distance plus grande que lors de l'utilisation du seul tube 20. Selon une autre variante de la présente invention, on dispose un matériau glissant sur la face interne du tube 20, par exemple de la paraffine, pour que les éléments légers contenus dans le tube 20 glissent mieux lors de leur expulsion. Après l'utilisation de la cartouche 72, le système de projection 10 selon l'invention est tel que représenté en figure 2. Pour réutiliser le système de projection après l'ouverture d'une cartouche 72, un utilisateur doit retirer le tube 20 et l'embase 16, puis enlever la cartouche 72. L'utilisateur introduit alors une nouvelle cartouche 72 dans la cavité 52 de la coulisse 48, puis met en place une nouvelle embase 16 à l'extrémité du boîtier 12, l'embase 16 étant généralement déjà équipée du tube 20. La présence des éléments de blocage 78, 80 impose une orientation déterminée de l'embase 16 par rapport au boîtier 12 lors de l'introduction de l'embase 16 dans le boîtier 12 de façon que les protubérances 36, 38 coulissent entre les éléments de blocage 78, 80 lors du déplacement axial de l'embase 16. Chaque protubérance 36, 38 appuie alors sur une patte 60, 62 de la coulisse 48. L'enfoncement de l'embase 16 entraîne alors l'enfoncement de la coulisse 48 dans le tube 12 et comprime le ressort 46 jusqu'à ce que les renforts 68, 70 s'engagent dans l' épaulement 93 par déformation des pattes 60, 62, bloquant alors la coulisse 48 en translation axiale. L'utilisateur pivote alors l'embase 16 selon l'axe D jusqu'à ce que les protubérances 36, 38 butent contre les butées 80, 82 des éléments de blocage 78, 80. Le système de projection 10 est prêt pour une nouvelle utilisation. Selon une variante de la présente invention, en réaction au choc entre la cartouche 72 et le percuteur 30, la cartouche 72 est projetée axialement contre le fond 54 de la coulisse 48 avec une force suffisante pour entraîner le déplacement de la coulisse 48 et comprimer le ressort 46 jusqu'à ce que les renforts 68, 70 s'engagent dans l' épaulement 93 par déformation des pattes 60, 62, bloquant alors la coulisse 48 en translation axiale. Une telle variante permet donc de réarmer automatiquement le système de projection 10. Pour réutiliser le système de projection 10, un utilisateur doit retirer le tube 20 et l'embase 16, puis enlever la cartouche 72. L'utilisateur introduit alors une nouvelle cartouche 72 dans la cavité 52 de la coulisse 48, puis met en place une nouvelle embase 16 à l'extrémité du boîtier 12, l'embase 16 étant généralement déjà équipée du tube 20. L'utilisateur pivote alors l'embase 16 selon l'axe D jusqu'à ce que les protubérances 36, 38 butent contre les butées 80, 82 des éléments de blocage 78, 80. Le système de projection 10 est prêt pour une nouvelle utilisation. Le système de projection 10 selon la présente invention est conçu de façon qu'un utilisateur doit appuyer simulta- nément sur les deux lamelles 86, 88 pour libérer les deux renforts 68, 70 de l' épaulement 93 et permettre le déplacement de la coulisse 48. Ceci permet d'éviter la libération accidentelle de la coulisse 48 lorsque l'utilisateur appuie par inadvertance seulement sur une lamelle 86, 88. Selon une variante de la présente invention, on dispose un aimant au niveau du fond 54 de la coulisse 48. La cartouche 72 étant généralement constituée d'un matériau métallique, une telle variante permet le maintien de la cartouche 72 au fond 54 de la coulisse 48 pendant la manipulation du système de projection 10 même lorsque le tube 20 est orienté vers le bas. Bien entendu, l'action de l'aimant n'est pas suffisante pour s'opposer à la projection de la cartouche 72 contre le projecteur 30, lorsque le collet 56 de la coulisse 48, entraînée par la détente du ressort 46, bute contre 1' épaulement 93 interrompant brusquement le déplacement de la coulisse 48. Les figures 6 et 7 représentent des vues agrandies de détail d'un exemple de réalisation du percuteur 30. Le percuteur 30 comprend une tige cylindrique 94 insérée dans l'ouverture 28 pour la fixation du percuteur 30 à l'embase 16. Le percuteur 30 comprend une extrémité d'attaque conique 95 séparée de la tigeThe present invention relates to a system for projecting light elements into the air, in particular paper or plastic, for example confetti or streamers, during festive events. An example of a projection system corresponds to the product marketed by Brezac .Artifices under the Kabuki brand. Such a projection system consists of a base on which a compressed gas cartridge is fixed. A tube containing the light elements to be projected into the air is mounted on the base so as to receive the gases supplied by the cartridge. A striker which can be operated manually or automatically is suitable for piercing the cartridge. The released gases then spread in the tube and project the light elements into the air. A disadvantage of such a projection system is that it is difficult to ensure, at each use, an optimal drilling of the cartridge. In fact, the amplitude of the kinetic energy that can be transmitted to the striker to ensure the opening of the cartridge is generally limited. In fact, when the projection system is actuated manually, the striker is set in motion directly by a user, for example by pulling a string. The amplitude of the energy- transmitted to the striker is then limited by the energy that the user can develop. When the projection system is actuated automatically, the striker is generally connected to a spring, maintained in the compressed state by a locking means actuated by an electromagnet. The spring is released when the electromagnet receives a control signal. However, the low mass of the striker and the space constraints limit the amplitude of the kinetic energy that can be transmitted to the striker. Another drawback of such a projection system is that the compressed gas cartridge is fixed to the base, for example by screwing. It is therefore necessary, between two uses of the projection system, to dismantle the used cartridge and to mount a new cartridge instead. Such disassembly and assembly operations generally require a significant length of time. The present invention aims to obtain a system for projecting light elements, using a compressed gas cartridge, improving the opening of the cartridge by the striker. The present invention also aims to obtain a system for projecting light elements in which the replacement of the compressed gas cartridge is simple and rapid. To achieve these objects, the present invention provides a system for projecting light elements into the air, comprising a housing connected to a reservoir containing the light elements and comprising an opening extending in a determined direction; a slide adapted to slide in the opening in the determined direction; a striker disposed in the opening and fixed relative to the housing; means for sliding the slide in the opening; means for locking the slide relative to the housing in a stopped position; a compressed gas cartridge adapted to be driven in sliding by the slide and, when the slide is locked in the stop position, to be thrown against the striker to be opened by the striker; and means for conducting the gases released when the cartridge is opened to the reservoir. According to a projection mode of the invention, the projection system comprises an additional locking means of the slide relative to the housing in an arming position in which the slide is farther from the striker than in the stopped position ; and means for releasing the slide sliding in the opening from the cocking position. According to a projection mode of the invention, the means for sliding the slide is a helical spring comprising a first end connected to the housing and a second end connected to the slide, the spring being compressed when the slide is in the position of arming and being adapted to relax to slide the slide between the arming position and the stop position. According to a projection mode of the invention, the opening includes a shoulder for locking the slide in the stopped position. According to a method of projection of the invention, the slide comprises a body and at least one reinforcement connected to the body by a tab extending in a determined direction, the opening comprising a shoulder adapted to receive the reinforcement to block the slide to the cocking position, the tab being deformable to release the reinforcement of the shoulder. According to a projection mode of the invention, the system comprises a base disposed at one end of the opening, the striker being fixed to the base, the base comprising at least one protuberance adapted to cooperate with the slide to place the slides in the arming position. According to a projection mode of the invention, the opening is cylindrical, the base being adapted to be pivoted relative to the housing from a first position in which the base prevents the sliding of the slide to a second position in which the slide is free to slide. According to a projection mode of the invention, the reservoir is fixed to the base, said base comprising openings for the passage of the gases released when the cartridge is opened. According to a projection mode of the invention, the housing comprises at least one flexible blade that can be actuated manually and is adapted to deform the tab to release the reinforcement from the shoulder. According to a projection mode of the invention, the system comprises means for deforming the tab comprising a movable arm, one end of which is adapted to deform the tab and an electromagnet adapted to actuate the arm. These objects, characteristics and advantages, as well as others of the present invention will be explained in detail in the following description of particular embodiments given without limitation in relation to the attached figures, among which: FIGS. 1 and 2 represent sections of the projection system according to the invention in two successive stages of the use of the projection system; FIG. 3 represents an exploded view of elements of the projection system according to the invention; Figures 4 and 5 show respectively a perspective view and a top view of an element of the projection system according to the invention; Figures 6 and 7 respectively show an enlarged side view and top view of the striker of the projection system according to the invention; and FIGS. 8 and 9 respectively represent a side view and a partial front section of an automatic actuation device of the projection system according to the invention. Figures 1 to 5 show several views of a projection system 10 according to the invention. The system of projection 10 comprises a cylindrical housing 12 traversed by a cylindrical opening 13 of axis D, closed by a plug 14 at one end and by a base 16 at the opposite end. By way of example, the axial length of the housing 12 is a few tens of centimeters and the internal radius of the housing 12 varies from a few centimeters to ten centimeters. The base 16 comprises a base 17, obstructing the end of the housing 12, from which a cylindrical support 18 is projected along the axis D. A tube 20, of which only a portion is shown in Figures 1 to 3, is fixed to the cylindrical support 18, for example by stapling or gluing, and extends along the axis D. The tube 20 contains light elements, not shown, in particular in paper or plastic, for example confetti or streamers. The tube 20 is advantageously made of cardboard, or of any material at low cost, which can easily tear under the action of an internal overpressure. The cylindrical support 18 comprises a collar 21 which abuts against the housing 12. An auxiliary cylindrical support 22 coaxial with the cylindrical support 18 and having a diameter less than the diameter of the cylindrical support 18 projects from the base 17. The arrangement of the cylindrical supports 18, 22 allows the choice of mounting between one of the following tubes: the tube 20 said to be of large diameter mounted at the level of the outer lateral surface of larger diameter of the cylindrical support 18, a tube (not shown) said to be of intermediate diameter mounted between the cylindrical supports 18, 22 or a tube (not shown) of small diameter mounted at the inner lateral surface of smaller diameter of the cylindrical support 22. The base 17 includes openings 26 allowing passage of gas between the opening 13 and the inside of the tube 20. The base 17 comprises an opening 28 receiving a striker 30 which projects in relation to the share the 17 in the opening 13. The base 17 is extended by a cylindrical wall 32 which projects along the axis D in the opening 13. As can be seen more clearly in FIG. 3, the cylindrical wall 32 has two protrusions 36, 38 arranged diametrically opposite on the exterior surface of the cylindrical wall 32. Each protrusion 36 comprises two rectilinear portions 37A- 37B extending along 1 ' axis D and connected at the ends by two circular portions 37C, 37D. The plug 14 comprises a bottom 40 obstructing the end of the housing 12 opposite the base 16. A flange 42 facilitates the mounting of the plug 14 on the housing 12. The plug 14 comprises a cylindrical portion 44 which projects from the bottom 40 in the opening 13 along the axis D. A spiral spring 46 is placed in the opening 13. One end of the spring 46 bears against the bottom 40 of the plug 14, between the cylindrical portion 44 and the housing 12, the cylindrical portion 44 facilitating the centering of the spring 46. A slide 48 is arranged in the housing 12 between the base 16 and the spring 46. The slide 48 comprises a cylindrical body 50 which extends along the axis D and which is partially inserted in the spring 46. The cylindrical body 50 comprises a cylindrical internal cavity 52 closed at one end by a bottom 54 and open at the opposite end. The external diameter of the body 50 corresponds substantially to the internal diameter of the cylindrical wall 32 of the base 16. The body 50 comprises in the middle part a collar 56 forming a shoulder 58 against which abuts one end of the spring 46. Two legs 60 , 62 project from the collar 56, on the side of the collar 56 opposite the spring 46. Each tab 60, 62 corresponds to a portion of a cylinder oriented along the axis of the housing 12. A space 64, 66 is provided between each leg 60, 62 and the cylindrical body 50 for the passage of the cylindrical wall 32 of the base 16. A reinforcement 68, 70 is disposed at the free end of each leg 60, 62. The legs 60, 62 have a certain elasticity and are liable to deform under the action of a force transverse to the axis D. A cylindrical cartridge 72 of compressed gas is disposed in the internal cavity 52 of the cylindrical body 50. A fixing means can be provided to maintain the cartridge 72 in the internal cavity 52 in the absence of significant efforts so as, in particular, to maintain the cartridge 72 in the internal cavity 52 when the projection system 10 is oriented so that the free end of the tube 20 points to the ground. The opening 13 of the housing 12 comprises a shoulder 76 on the side of the end close to the tube 20. The opening 13 comprises two locking elements 78, 80, visible in FIGS. 4 and 5, having the shape of portions of arcs cylindrical which project from the internal surface of the housing 12 in a substantially diametrically opposite manner and which are arranged near the shoulder 76. The angle seen from the axis D in which each locking element 78, 80 is inscribed less than 90 °. Each locking element 78, 80 has a stop 81 at one of the faces included in planes comprising the axis D (only one stop is visible in FIG. 4). The stops 81 are arranged diametrically opposite. The housing 12 comprises in the middle part two slots 82, 84 in the shape of a U arranged in a diametrically opposite manner and each delimiting a flexible strip 86, 88. A recess 90, 92 is provided at the level of each tongue 86, 88 to facilitate its handling. The opening 13 comprises a shoulder 93 disposed between the strips 86, 88 and the first shoulder 76 near the strips 86, 88. The initial mounting of the projection system 10 according to the present invention is carried out as follows. On the side of the end of the housing 12 opposite the shoulder 76, the slide 48, the spring 46 and the plug 14 are successively introduced. The slide 48 is pressed into the opening 13 until the reinforcements 68, 70 of the legs 60, 62 come into contact with the shoulder 93 preventing the progression of the slide 48 further forward in the opening 13. The orientation of the slide 48 relative to the housing 12 is imposed by means not shown so that, when the reinforcements 68, 70 of the slide 48 are in abutment against the shoulder 93, each reinforcement 68, 70 is substantially facing a strip 86, 88. By the opposite end of the housing 12, a cartridge 72 of compressed gas is introduced into the cavity 52 of the slide 48, then the housing 12 is closed by the base 16 to which the tube 20 containing the light elements is previously fixed. Once placed at the level of the housing 12, the base 16 is pivoted about the axis D. The insertion of the base 16 into the housing 12 is such that, during the rotation of the base 16, the protrusions 36, 38 and the base 16 sandwich the locking elements 78, 80 until the protrusions 36, 38 come into contact against the stops 81. The projection system 10 is then substantially in the configuration shown in Figure 1. The projection system 10 is said to be armed insofar as it is ready to be used. The projection of the light elements contained in the tube 20 is obtained by exerting pressure simultaneously on the strips 86, 88, which slightly deform the legs 60, 62, causing the release of the reinforcements 68, 70 from the shoulder 93. The spring 46 then relaxes violently and drives the slide 48 which moves axially in the direction of the base 16. When the collar 56 of the slide 48 abuts against the shoulder 93, the slide 48 abruptly interrupts its travel. The cartridge 72 is then projected against the striker 30. The kinetic energy acquired by the cartridge 72 is sufficient to cause the opening of the cartridge 72 during the impact with the striker 30 and the release of the gases contained in the cartridge 72. In reaction to shock, the cartridge 72 is thrown axially against the bottom 54 of the slide 48. The gases then spread in the free part of the internal cavity 52 and pass through the openings 26 in the tube 20. The overpressure resulting is sufficient to cause the expulsion of the light elements outside the tube 20. Advantageously, the striker 30 is made of a sufficiently soft material so that the end of the striker 30 is dulled upon impact with the cartridge 72 so as to impose the change of the base 16 between two uses of the projection system 10. According to a variant of the present invention, there is a damping material at the bottom 54 of the slide 48 to prevent the cartridge 72 does not fit into the slide 48 during the counter-shock which follows the opening of the cartridge 72. It is preferable that the end of the tube 20 opposite the housing 12 is closed by a seal intended to be pierced by the overpressure present in the tube 20 during the release of the gases from the cartridge 72. Indeed, the Applicant has demonstrated that the projection of the light elements contained in the tube 20 takes place at a distance more important when the tube 20 is closed initially. Advantageously, a small clearance is provided between the cylindrical body 50 of the slide 48 and the cylindrical wall 32 extending the base 17. This limits, during the opening of the cartridge 72, gas leaks between the cylindrical body 50 and the cylindrical wall 32, thus promoting the increase in pressure in the free part of the internal cavity 52 and accelerating the flow of gases through the openings 26 in the tube 20. According to a variant of the invention, provision is made, in addition to the tube 20, an auxiliary tube (not shown), disposed at the level of the cylindrical support 22 of the base 16, inside the tube 20 and not containing light elements, the light elements being provided between the tube 20 and the auxiliary tube. The auxiliary tube is plugged at the end opposite to the cylindrical support 22. The release of gas successively causes the drilling of the auxiliary tube then of the tube 20. The Applicant has demonstrated that such a configuration allows the projection light elements at a greater distance than when using the single tube 20. According to another variant of the present invention, there is a sliding material on the internal face of the tube 20, for example paraffin, so that the light elements contained in the tube 20 slide better during their expulsion. After using the cartridge 72, the projection system 10 according to the invention is as shown in FIG. 2. To reuse the projection system after opening a cartridge 72, a user must remove the tube 20 and the base 16, then remove the cartridge 72. The user then introduces a new cartridge 72 into the cavity 52 of the slide 48, then sets up a new base 16 at the end of the housing 12, the base 16 being generally already equipped with the tube 20. The presence of the locking elements 78, 80 requires a determined orientation of the base 16 relative to the housing 12 when the base 16 is introduced into the housing 12 so that the protrusions 36 , 38 slide between the locking elements 78, 80 during the axial movement of the base 16. Each protrusion 36, 38 then presses on a tab 60, 62 of the slide 48. The depression of the base 16 then causes l insertion of the slide 48 dan s the tube 12 and compresses the spring 46 until the reinforcements 68, 70 engage in the shoulder 93 by deformation of the legs 60, 62, then blocking the slide 48 in axial translation. The user then pivots the base 16 along the axis D until the protrusions 36, 38 abut against the stops 80, 82 of the locking elements 78, 80. The projection system 10 is ready for new use . According to a variant of the present invention, in reaction to the impact between the cartridge 72 and the striker 30, the cartridge 72 is thrown axially against the bottom 54 of the slide 48 with sufficient force to cause the displacement of the slide 48 and compress the spring 46 until the reinforcements 68, 70 engage in the shoulder 93 by deformation of the legs 60, 62, then blocking the slide 48 in axial translation. Such a variant therefore makes it possible to automatically rearm the projection system 10. To reuse the projection system 10, a user must remove the tube 20 and the base 16, then remove the cartridge 72. The user then introduces a new cartridge 72 in the cavity 52 of the slide 48, then sets up a new base 16 at the end of the housing 12, the base 16 generally being already equipped with the tube 20. The user then pivots the base 16 along the axis D until the protrusions 36, 38 abut against the stops 80, 82 of the locking elements 78, 80. The projection system 10 is ready for new use. The projection system 10 according to the present invention is designed so that a user must press simultaneously on the two strips 86, 88 to release the two reinforcements 68, 70 from the shoulder 93 and allow movement of the slide 48 This avoids accidental release of the slide 48 when the user inadvertently presses only on a strip 86, 88. According to a variant of the present invention, there is a magnet at the bottom 54 of the slide 48. Since the cartridge 72 is generally made of a metallic material, such a variant allows the cartridge 72 to be held at the bottom 54 of the slide 48 during the handling of the projection system 10 even when the tube 20 is oriented downwards. Of course, the action of the magnet is not sufficient to oppose the projection of the cartridge 72 against the projector 30, when the collar 56 of the slide 48, driven by the relaxation of the spring 46, abuts against 1 shoulder 93 abruptly interrupting the movement of the slide 48. Figures 6 and 7 show enlarged detail views of an exemplary embodiment of the striker 30. The striker 30 comprises a cylindrical rod 94 inserted in the opening 28 for the fixing the striker 30 to the base 16. The striker 30 includes a 95 tapered lead end separate from the stem
94 par un collet 96. L'angle au sommet de l'extrémité conique 95 est, à titre d'exemple, d'environ 2 degrés. L'extrémité conique94 by a collar 96. The angle at the top of the conical end 95 is, for example, about 2 degrees. The tapered end
95 comprend une paroi biseautée 97. L'angle formé entre la paroi biseautée 97 et l'axe du percuteur 30 est d'environ 15 degrés.95 comprises a bevelled wall 97. The angle formed between the bevelled wall 97 and the axis of the striker 30 is approximately 15 degrees.
Un méplat 98 s'étend sur l'extrémité conique 94 depuis la paroi biseautée 97 jusqu'au collet 96. Le collet comprend un enfoncement 99 disposé sur la face du collet 96 perpendiculaire à l'axe du percuteur 30 et située du côté de l'extrémité conique 95. L'enfoncement 99 s'étend depuis le méplat 98 jusqu'à l'extrémité radiale du collet 96. Un tel percuteur 30 permet de réaliser une ouverture optimale de la cartouche 72. En effet, la paroi biseautée 97 facilite le perçage de la cartouche 72. Dès le début du perçage de la cartouche 72, des gaz peuvent s'échapper de la cartouche 72 par l'intermédiaire du méplat 98 et de l'enfoncement 99. Lorsque la cartouche 72 bute contre le collet 96, une telle évacuation de gaz facilite le recul de la cartouche 72 et permet d'éviter l'encastrement de la cartouche 72 sur l'extrémité conique 95. Les figures 8 et 9 représentent un dispositif d'actionnement automatique 100 du système de projection 10 selon 1 ' invention . Le dispositif d'actionnement automatique 100 comprend un carter 102, dans lequel est disposé un système de projection manuel 10 tel que décrit précédemment. En figure 9, seul le boîtier 12 et le bouchon 14 du système de projection 10 sont représentés . Le bouchon 14 a une forme arrondie . De façon avantageuse, un collier strié 114 est disposé autour du boîtier 12 pour en faciliter la préhension. Le carter 102 comprend une base 105 sur laquelle s'appuie le bouchon 14. Une nervure rectiligne 106 s'étend sur la paroi 105 et coopère avec une rainure 107 prévue sur le fond 14 du boîtier 12. La coopération de la nervure 106 et de la rainure 107 bloque le boîtier 12 en rotation par rapport au carter 102. Le carter 102 est monté à pivotement sur une base 108 par l'intermédiaire d'une liaison à pivot 109. L'inclinaison du carter 102 par rapport à la base 108 définit la direction de projection des éléments légers. Le carter 102 comprend deux bras pivotants 110, 112 disposés de façon sensiblement diamétralement opposée par rapport au boîtier 12 et montés chacun à rotation en partie médiane sur un pivot 114, 116. Chaque bras 110, 112 comprend à une extrémité un renflement 118, 120 agencé en vis-à-vis d'une lamelle 86, 88 du boîtier 12. Un électro-aimant 122 est disposé dans le carter 102 et est commandé par un circuit de commande non représenté. Une tige 124 est montée libre en coulissement par rapport à 1 ' électro-aimant 122 et est adaptée à pénétrer dans 1 'électro-aimant 122 lorsque ce dernier est traversé par un courant. Une bielle 126, 128 relie l'extrémité de chaque bras 110, 112 opposée au renflement 118, 120 à la tige 124. Chaque bielle 126, 128 est montée à rotation sur le bras 110, 112 et sur la tige 124. Lorsque 1 ' électro-aimant 122 n'est pas traversé par un courant, un moyen de rappel, non représenté, place la tige 124 dans une position où elle est le plus retirée de 1 ' électro-aimant 122. Les bielles 126, 128 font alors pivoter les bras 110, 112 de sorte que les renflements 118, 120 ne sont pas en contact avec les lamelles 86, 88 du boîtier 12. Lorsque le circuit de commande alimente l'électro- aimant 122, la tige 124 pénètre dans 1 'électro-aimant 122. Les bielles 126, 128, entraînées par la tige 124 font pivoter les bras pivotants 110, 112 de façon que chaque renflement 118, 120 appuie contre une lamelle 86, 88. Ceci entraîne la libération de la coulisse 48 du système de projection 10 comme cela a été expliqué précédemment. Le circuit de commande de l' électroaimant 122 comprend un condensateur stockant l'énergie nécessaire à l'alimentation de 1 'électro-aimant 122, un transformateur de puissance disposé entre le condensateur et l' électroaimant 122, et un circuit de commande du condensateur. Le carter 102 comprend une prise d'entrée 130 à trois bornes 131, 132, 133. A titre d'exemple, une tension d'alimentation, par exemple de l'ordre de 24 volts, est appliquée entre les bornes 131 et 132 et permet le chargement du condensateur du circuit de commande de 1 ' électro-aimant 112. Une tension de commande du circuit de commande est appliquée entre les bornes 131 et 133 et alimente le circuit de commande du condensateur pour provoquer la décharge du condensateur dans 1 'électro-aimant 122. Une diode peut être agencée au niveau du carter 102 pour indiquer un chargement correct du condensateur. Le carter 102 peut comprendre une prise de sortie 135 permettant de relier en série plusieurs dispositifs de d'actionnement automatique 100 selon l'invention. La présente invention comporte de nombreux avantages : Premièrement, la libération de la coulisse 48 par un ressort de compression 46 permet de développer des forces importantes favorisant une plus grande ouverture de la cartouche 72 lors du choc avec le percuteur 30 entraînant ainsi une meilleure libération des gaz contenus dans la cartouche 72 et donc une meilleure projection des éléments légers contenus dans le tube 20. En outre, le volume présent dans la cavité interne 52 de la coulisse 48 permet une meilleure expansion des gaz expulsés de la cartouche 72 et favorise une meilleure projection des éléments légers. Deuxièmement, la cartouche de gaz comprimé 72 n'étant pas fixée au système de projection, elle peut être très rapidement remplacée. Troisièmement, le fonctionnement du système de projection d'éléments légers est très simple puisqu'il requiert une simple pression des languettes 86, 88. Bien entendu, la présente invention est susceptible de diverses variantes et modifications qui apparaîtront à l'homme de l'art. En particulier, le nombre et la répartition des ouver¬ tures de l'embase permettant le passage des gaz libérés par la cartouche dépendent des dimensions de la cartouche et du tube contenant les éléments légers à projeter. A flat 98 extends over the conical end 94 from the bevelled wall 97 to the collar 96. The collar comprises a recess 99 disposed on the face of the collar 96 perpendicular to the axis of the striker 30 and located on the side of the conical end 95. The depression 99 extends from the flat 98 to the radial end of the collar 96. Such a striker 30 makes it possible to achieve an optimal opening of the cartridge 72. In fact, the bevelled wall 97 facilitates the drilling of the cartridge 72. As soon as the drilling of the cartridge 72 begins, gases can escape from the cartridge 72 via the flat 98 and the depression 99. When the cartridge 72 abuts the collar 96 , such a gas evacuation facilitates the recoil of the cartridge 72 and makes it possible to avoid the embedding of the cartridge 72 on the conical end 95. FIGS. 8 and 9 show an automatic actuation device 100 of the projection system 10 according to the invention. The automatic actuation device 100 comprises a casing 102, in which is disposed a manual projection system 10 as described above. In Figure 9, only the housing 12 and the plug 14 of the projection system 10 are shown. The plug 14 has a rounded shape. Advantageously, a striated collar 114 is arranged around the housing 12 to facilitate gripping. The casing 102 comprises a base 105 on which the plug 14 rests. A rectilinear rib 106 extends over the wall 105 and cooperates with a groove 107 provided on the bottom 14 of the housing 12. The cooperation of the rib 106 and the groove 107 blocks the housing 12 in rotation relative to the casing 102. The casing 102 is pivotally mounted on a base 108 by means of a pivot link 109. The inclination of the casing 102 relative to the base 108 defines the direction of projection of the light elements. The casing 102 comprises two pivoting arms 110, 112 arranged in a substantially diametrically opposite manner relative to the housing 12 and each mounted for rotation in the middle part on a pivot 114, 116. Each arm 110, 112 comprises at one end a bulge 118, 120 arranged opposite a strip 86, 88 of the housing 12. An electromagnet 122 is disposed in the casing 102 and is controlled by a control circuit not shown. A rod 124 is mounted to slide freely relative to the electromagnet 122 and is adapted to penetrate into the electromagnet 122 when the latter is traversed by a current. A connecting rod 126, 128 connects the end of each arm 110, 112 opposite the bulge 118, 120 to the rod 124. Each connecting rod 126, 128 is rotatably mounted on the arm 110, 112 and on the rod 124. When 1 ' electromagnet 122 is not traversed by a current, a return means, not shown, places the rod 124 in a position where it is most removed from one electromagnet 122. The connecting rods 126, 128 then rotate the arms 110, 112 so that the bulges 118, 120 are not in contact with the lamellae 86, 88 of the housing 12. When the control circuit supplies the electromagnet 122, the rod 124 enters the electromagnet magnet 122. The connecting rods 126, 128, driven by the rod 124 rotate the pivoting arms 110, 112 so that each bulge 118, 120 presses against a strip 86, 88. This causes the slide 48 to be released from the projection system 10 as explained above. The control circuit of the electromagnet 122 comprises a capacitor storing the energy necessary to supply the electromagnet 122, a power transformer disposed between the capacitor and the electromagnet 122, and a capacitor control circuit . The casing 102 comprises an input socket 130 with three terminals 131, 132, 133. By way of example, a supply voltage, for example of the order of 24 volts, is applied between the terminals 131 and 132 and allows charging of the capacitor of the control circuit of the electromagnet 112. A control voltage of the control circuit is applied between the terminals 131 and 133 and supplies the control circuit of the capacitor to cause the discharge of the capacitor in 1 ' electromagnet 122. A diode can be arranged at the casing 102 to indicate correct charging of the capacitor. The casing 102 may include an outlet 135 making it possible to connect several automatic actuation devices 100 according to the invention in series. The present invention has many advantages: First, the release of the slide 48 by a compression spring 46 makes it possible to develop significant forces favoring a greater opening of the cartridge 72 during the impact with the striker 30 thus resulting in better release of the gases contained in the cartridge 72 and therefore better projection of the light elements contained in the tube 20. In addition, the volume present in the internal cavity 52 of the slide 48 allows better expansion of the gases expelled from the cartridge 72 and promotes better projection of light elements. Secondly, since the compressed gas cartridge 72 is not fixed to the projection system, it can be replaced very quickly. Third, the operation of the light element projection system is very simple since it requires a simple pressure of the tabs 86, 88. Of course, the present invention is susceptible to various variants and modifications which will appear to those skilled in the art. art. In particular, the number and distribution of the OPEN ¬ tures of the base plate allowing the passage of gases released by the cartridge depend on the dimensions of the cartridge and the tube containing the light elements to be projected.

Claims

REV-i-NDICATIONS REV-i-NDICATIONS
1. Système de projection (10) d'éléments légers dans les airs, comprenant : un boîtier (12) relié à un réservoir (20) contenant les éléments légers et comprenant une ouverture (13) s 'étendant selon une direction déterminée ; - une coulisse (48) adaptée à coulisser dans l'ouverture selon la direction déterminée ; - un percuteur (30) disposé dans l'ouverture et fixe par rapport au boîtier ; - un moyen (46) pour faire coulisser la coulisse dans1. A system for projecting (10) light elements into the air, comprising: a housing (12) connected to a reservoir (20) containing the light elements and comprising an opening (13) extending in a determined direction; - A slide (48) adapted to slide in the opening in the determined direction; - a striker (30) disposed in the opening and fixed relative to the housing; - a means (46) for sliding the slide in
1 ' ouverture ; - un moyen de blocage (56, 93) de la coulisse par rapport au boîtier dans une position d'arrêt ; - une cartouche (72) de gaz comprimé adaptée à être entraînée en coulissement par la coulisse et, lorsque la coulisse est bloquée à la position d'arrêt, à être projetée contre le percuteur pour être ouverte par le percuteur ; et - un moyen (26, 52) pour conduire les gaz libérés lors de l'ouverture de la cartouche vers le réservoir. 1 opening; - a locking means (56, 93) of the slide relative to the housing in a stopped position; - A cartridge (72) of compressed gas adapted to be driven in sliding by the slide and, when the slide is locked in the stopped position, to be thrown against the striker to be opened by the striker; and - means (26, 52) for conducting the gases released during the opening of the cartridge towards the reservoir.
2. Système de projection (10) selon la revendication2. projection system (10) according to claim
1, comprenant : - un moyen de blocage supplémentaire (68, 70, 93) de la coulisse (48) par rapport au boîtier (12) dans une position d'armement à laquelle la coulisse est plus éloignée du percuteur (30) qu'à la position d'arrêt ; et - un moyen de libération (86, 88) de la coulisse en coulissement dans l'ouverture (13) depuis la position d'armement. 1, comprising: - an additional locking means (68, 70, 93) of the slide (48) relative to the housing (12) in an arming position to which the slide is farther from the striker (30) than at the stop position; and - means for releasing (86, 88) from the slide sliding in the opening (13) from the cocking position.
3. Système de projection (10) selon la revendication3. projection system (10) according to claim
2, dans lequel le moyen (46) pour faire coulisser la coulisse (48) est un ressort hélicoïdal comprenant une première extrémité reliée au boîtier (12) et une seconde extrémité reliée à la coulisse, le ressort étant comprimé lorsque la coulisse est dans la position d'armement et étant adapté à se détendre pour faire coulisser la coulisse entre la position d'armement et la position d'arrêt. 2, in which the means (46) for sliding the slide (48) is a helical spring comprising a first end connected to the housing (12) and a second end connected to the slide, the spring being compressed when the slide is in the arming position and being adapted to relax to do slide the slide between the cocking position and the stop position.
4. Système de projection (10) selon la revendication4. projection system (10) according to claim
1, dans lequel l'ouverture (13) comprend un épaulement (93) pour bloquer la coulisse (48) dans la position d'arrêt. 1, in which the opening (13) comprises a shoulder (93) for locking the slide (48) in the stopped position.
5. Système de projection (10) selon la revendication 2, dans lequel la coulisse (48) comprend un corps (50) et au moins un renfort (68, 70) relié au corps par une patte (60, 62) s 'étendant dans une direction déterminée, l'ouverture (13) comprenant un épaulement (93) adaptée à recevoir le renfort pour bloquer la coulisse à la position d'armement, la patte étant déformable pour libérer le renfort de 1 ' épaulement . 5. projection system (10) according to claim 2, wherein the slide (48) comprises a body (50) and at least one reinforcement (68, 70) connected to the body by a tab (60, 62) extending in a determined direction, the opening (13) comprising a shoulder (93) adapted to receive the reinforcement to block the slide in the cocking position, the tab being deformable to release the reinforcement from the shoulder.
6. Système de projection (10) selon la revendication 2, comprenant une embase (16) disposée à une extrémité de l'ouverture (13), le percuteur (30) étant fixé à l'embase, l'embase comprenant au moins une protubérance (36, 38) adaptée à coopérer avec la coulisse (48) pour placer la coulisse dans la position d'armement. 6. projection system (10) according to claim 2, comprising a base (16) disposed at one end of the opening (13), the striker (30) being fixed to the base, the base comprising at least one protuberance (36, 38) adapted to cooperate with the slide (48) to place the slide in the cocking position.
7. Système de projection (10) selon la revendication7. projection system (10) according to claim
6, dans lequel l'ouverture (13) est cylindrique, l'embase (16) étant adaptée à être pivotée par rapport au boîtier (12) depuis une première position dans laquelle l'embase empêche le coulissement de la coulisse (48) jusqu'à une seconde position dans laquelle la coulisse est libre de coulisser. 6, in which the opening (13) is cylindrical, the base (16) being adapted to be pivoted relative to the housing (12) from a first position in which the base prevents the sliding of the slide (48) up 'to a second position in which the slide is free to slide.
8. Système de projection (10) selon la revendication 6, dans lequel le réservoir (20) est fixé à l'embase (16), ladite embase comprenant des ouvertures (26) pour le passage des gaz libérés lors de l'ouverture de la cartouche (72). 8. Projection system (10) according to claim 6, in which the reservoir (20) is fixed to the base (16), said base comprising openings (26) for the passage of the gases released during the opening of the cartridge (72).
9. Système de projection (10) selon la revendication9. projection system (10) according to claim
2, dans lequel le boîtier (12) comprend au moins une lamelle souple (86, 88) actionnable manuellement adaptée à déformer la patte (60, 62) pour libérer le renfort (68, 70) de l' épaulement2, in which the housing (12) comprises at least one flexible blade (86, 88) which can be actuated manually and which is adapted to deform the tab (60, 62) to release the reinforcement (68, 70) from the shoulder
(93). (93).
10. Système de projection (10) selon la revendication10. Projection system (10) according to claim
5, comprenant un moyen pour déformer la patte (60, 62) comportant un bras (110, 112) mobile dont une extrémité est adaptée à déformer la patte et un électro-aimant (122) adapté à actionner le bras. 5, comprising means for deforming the tab (60, 62) comprising a movable arm (110, 112), one end of which is adapted to deform the tab and an electromagnet (122) adapted to actuate the arm.
EP04767879A 2003-07-09 2004-07-08 System for launching lightweight elements during festive events Expired - Lifetime EP1642082B1 (en)

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FR0350313A FR2857441B1 (en) 2003-07-09 2003-07-09 LIGHT ELEMENTS PROJECTION SYSTEM FOR FESTIVE EVENTS
PCT/FR2004/050318 WO2005005909A1 (en) 2003-07-09 2004-07-08 System for launching lightweight elements during festive events

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EP1642082A1 true EP1642082A1 (en) 2006-04-05
EP1642082B1 EP1642082B1 (en) 2010-09-08

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AT (1) ATE480747T1 (en)
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Also Published As

Publication number Publication date
EP1642082B1 (en) 2010-09-08
FR2857441B1 (en) 2006-07-07
ATE480747T1 (en) 2010-09-15
CN1717572A (en) 2006-01-04
DE602004029041D1 (en) 2010-10-21
CA2507104A1 (en) 2005-01-20
US7293558B2 (en) 2007-11-13
US20060054152A1 (en) 2006-03-16
WO2005005909A1 (en) 2005-01-20
FR2857441A1 (en) 2005-01-14
CN1717572B (en) 2010-06-16

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