EP0105001B1 - Safety device with a rotatable housing for a spinning projectile - Google Patents

Safety device with a rotatable housing for a spinning projectile Download PDF

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Publication number
EP0105001B1
EP0105001B1 EP83401862A EP83401862A EP0105001B1 EP 0105001 B1 EP0105001 B1 EP 0105001B1 EP 83401862 A EP83401862 A EP 83401862A EP 83401862 A EP83401862 A EP 83401862A EP 0105001 B1 EP0105001 B1 EP 0105001B1
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EP
European Patent Office
Prior art keywords
axis
cage
rotation
missile
peripheral face
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.)
Expired
Application number
EP83401862A
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German (de)
French (fr)
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EP0105001A1 (en
Inventor
Jacques Nicolas
Roland Raso
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.)
Manurhin Defense SA
Original Assignee
Manufacture de Machines du Haut Rhin SA MANURHIN
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Priority to AT83401862T priority Critical patent/ATE21765T1/en
Publication of EP0105001A1 publication Critical patent/EP0105001A1/en
Application granted granted Critical
Publication of EP0105001B1 publication Critical patent/EP0105001B1/en
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F42C15/188—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier
    • F42C15/192—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile
    • F42C15/196—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile by the action of centrifugal or inertia forces on the carrier body, e.g. the carrier having eccentrically mounted weights or eccentric centre of gravity

Definitions

  • the present invention relates to a rotating cage safety device for a revolving projectile.
  • projectiles carrying a military charge
  • a device for firing the latter and, to prevent this firing from occurring inadvertently during storage, feeding into the weapon, the path in the weapon tube during firing, and during the first meters of the trajectory of the projectile out of this tube, are also equipped with safety devices then preventing the operation of the firing device, to not allow that -when when the projectile has left the weapon barrel.
  • a gyroscopic rotor is used for this purpose which tends to tilt, during gyration of the projectile, from a position in which its axis of inertia makes an angle with the axis of gyration of the projectile and in which it interrupts a chain.
  • pyrotechnic thereof in a position in which the two axes are aligned and in which the continuity of the pyrotechnic chain is established.
  • the alignment of the axis of inertia of the gyroscopic rotor with the axis of gyration of the projectile tends to occur as soon as the projectile is subjected to a gyration, that is to say from its firing, it is desired to extend the security for a certain period of time after firing, corresponding for the projectile to a distance of a few meters from the muzzle of the weapon; for this purpose, means of locking are provided by pin, key, or any other similar device for maintaining for the desired time, or over the course of the desired distance, the gyroscopic rotor in the stationary state relative to the body of the projectile.
  • the aim of the present invention is to propose a safety device for a revolving projectile capable of operating by interrupting a pyrotechnic chain, or even by interrupting an electrical or fluidic circuit, for example firing or, on the contrary, closing an electrical circuit supplying security functions, therefore particularly efficiently, and which ensures, in a small footprint, with simple, economical and nevertheless reliable means, security over a distance of several tens of meters after leaving the projectile out of the weapon barrel.
  • the safety device generally comprising inside the body of the projectile, whose axis of gyration is defined, parallel to a determined direction of translation of the projectile, a movable member such as for example a gyroscopic rotor and at least one movable locking pin, under the action of centrifugal force following the gyration of the projectile, from a locking position of the movable member, in which it cooperates with the occupant a determined position to immobilize it in this position, to a position of release of the movable member in which this cooperation ceases, as well as at least one spiral strip normally wound and capable of taking place under the action of the force contri - fuge consecutive to the gyration of the projectile, as is known per se from FR-A-2 233 593, is characterized in that said member is movable inside a cage mounted for free rotation around the axis of girati one with respect to the body, inside thereof, by means of mounting means allowing the
  • a rocket body has been designated by 1, essentially of revolution around an axis 2 which constitutes its axis of gyration when, moving in translation in a direction 3 determined parallel to this axis 2, it turns on itself- even in a direction 4 which is a function of the direction of the scratches of the weapon tube by means of which the projectile is fired; the direction of gyration 4 indicated in FIGS. 3 to 5 corresponding to firing by means of a cannon, the tube of which is scored in a step to the right, by way of nonlimiting example.
  • the body 1 has a tubular shape and internally defines a cavity 5 open towards the rear and delimited inside the body 1 by an inner peripheral face 6 cylindrical of revolution around the axis 2 and by a annular front face 7, planar, oriented transversely with respect to axis 2 and joined by its outer periphery of face 6 and by its inner periphery of an inner peripheral face 8, cylindrical of revolution around axis 2 with a diameter smaller than that of the face 6, of an orifice 9 opening centrally therein and communicating forward with a channel 1 0 arranged in the body 1 for the guidance of a striker 11 along the axis 2 , from a front cocking position in which it is illustrated to a rear percussion position, projecting inside the cavity 5, which it can only gain after the safety device according to the invention has worked.
  • the body 1 integrally carries a base 12 which is remarkable in that it has a plane annular face 13 forwardly, oriented transversely with respect to the axis 2, contiguous by its periphery outside of the face 6 of the cavity 5 and through its inner periphery of an inner peripheral face 14, cylindrical of revolution around the axis 2, of an orifice 15 of the base 12, opening forward in this face 13 and towards the rear opposite a pyrotechnic relay 16 carried integrally by the base 12, behind the face 13; the face 13 thus defines for the cavity 5 a rear face.
  • a cage 17 which is delimited, if one refers to the assembled state of the device, by a peripheral face outer 18 cylindrical of revolution around the axis 2 and by two annular faces, pla nes, oriented transversely to this axis 2 and contiguous with the face 18 by their respective outer periphery, at the rate of a front face 19, facing forward and therefore placed opposite the front face 7 of the cavity 5, and a rear face 20 turned towards the rear and consequently placed opposite the rear face 13 of the cavity 5; for this purpose, the diameter of the face 18, which defines the outside diameter of the faces 19 and 20, is intermediate between the diameter of the face 6, on the one hand, and the respective diameters of the faces 8 and 14, on the other hand go.
  • the distance d separating the faces 19 and 20 parallel to the axis 2 is less than the value between the faces 7 and 13, measured in the same way.
  • the face 19 of the cage 17 is adjacent to an outer peripheral face 21, cylindrical of revolution around the axis 2 with a diameter closely similar to that of the inner peripheral face 8 of the orifice 9, d 'a pin 22 which the cage 17 carries integrally, projecting towards the front relative to its face 19, and which engages in the orifice 9 to ensure, by sliding contact between the faces 8 and 9, a guiding the cage 17 in rotation about the axis 2 relative to the body 1; similarly, the face 20 of the cage 17 is adjacent, by its internal periphery, to an external peripheral face 23, cylindrical of revolution around the axis 2 with a diameter as close as possible to that of the face 14, a pin 24 which the cage 17 projects projecting rearwardly relative to this face 20 and which engages in the orifice 15 so as to also provide such guidance for relative rotation, by mutual sliding contact of the faces 23 and 14.
  • the outer peripheral face 21 of the pin 22 is adjacent to the outer periphery of an annular face 25, transverse with respect to the axis 2, delimiting the pin 22 towards the front while, towards the rear , the outer peripheral face 23 of the pin 24 is adjacent to the outer periphery of an annular face 26, transverse with respect to the axis 2, delimiting this pin 24 towards the rear, and the distance separating respectively the face 25 of the face 19 and the face 26 of the face 20 parallel to the axis 2 is greater than the clearance and respectively less than the length of the face 8 or that of the face 14, measured parallel to the axis 2, so that the cage 17 and the body 1 can undergo a relative translation along this axis, in one direction or the other, within the limits of the clearance l, without being hampered and maintaining as good coaxiality as possible, by relative sliding faces 21 and 8 and faces 23 and 14 parallel to axis 2.
  • the pins 22 and 24 are hollow and, by their respective inner periphery, the faces 25 and 26 are contiguous with an inner peripheral face, respectively 27 or 28, cylindrical of revolution around the axis 2, opening inside of the cage 17 in a housing 29 constituting a bearing ensuring the guiding, in rotation in all directions around a center C located on the axis 2 and as far as possible fixed relative to the rotating cage 17, for a gyroscopic rotor 30.
  • the housing 29 has an inner peripheral face having a spherical inner envelope with center C
  • the gyroscopic rotor 30 has an outer peripheral face 31 also spherical, with a diameter as close as possible to the diameter of this envelope so that the center of this face 31 coincides as precisely as possible with the center C, and is in any case placed as exactly as possible on the axis 2.
  • the gyroscopic rotor 30 has its own axis of inertia 32 and is pierced right through, along this axis, with a channel 33 inside which is housed a primer 34, the shape and dimensions of the channel 33 in section transverse to the axis 32 and the diameter of the inner peripheral face 27 of the pin being suitable for allowing the passage of the striker 11 towards its percussion position, when the axis 32 coincides with the axis 2 in a privileged position of the gyroscopic rotor 30 inside the cage 17, position that the rotor tends to gain as soon as it is rotated around the axis 2; in this position, the rotor establishes the continuity of a pyrotechnic chain including the striker 11, the pin 22, the channel 33 with the primer 34, the pin 24 and the firing relay 16.
  • the rotor 30 is retained in a position in which its own axis of inertia 32 is angularly offset with respect to axis 2, with reference to the center C, that is to say in a position in which its channel 33 is not placed opposite the striker 11, by locking means which will now be described.
  • These locking means comprise in particular at least one pin oriented radially with respect to the axis 2, and preferably a plurality of such pins oriented radially with respect to the axis 2 and regularly distributed angularly with reference thereto, for immobilizing temporarily the rotor inside the cage 17 in an off-center position.
  • two pins 35 and 36 are thus provided, each of which has an external peripheral face, respectively 37 or 38, cylindrical of revolution about an own axis, respectively 39 or 40, and two end faces, respectively 41, 42 and 43, 44, oriented transversely to this own axis.
  • these pins 35 and 36 are retained in respective holes 45 and 46, cylindrical of revolution around the same axis 47 perpendicular to the axis 2, that the cavity 17 has between its faces 19 and 0, and which join the outer peripheral face 18 of the cage 17 to the inner housing 29 thereof; the housings 45 and 46 have an inner diameter complementary to the respective diameters of the faces 37 and 38 of the pins 35 and 36, to receive the latter sliding along the axis 47, in a position in which the respective axes merge with this axis 47 39 and 40 pins.
  • the length of the pins is such that, when they are engaged in a respective hole 45 or 46 of the cage 17 in a position in which one of their ends, respectively 42 or 44, is flush with the outer peripheral face 18 of the cage 17, their other end, respectively 41 or 43, located closer to the axis 2, penetrates inside the envelope spherical interior of the housing 29 and engages in a notch, respectively 48 or 49, which has for this purpose, respectively opposite the hole 45 or opposite the hole 46 along the axis 47, the outer peripheral face 31 of the gyroscopic rotor 30 when the latter occupies the offset position of its own axis of inertia 32 relative to the axis of gyration 2 of the body 1 chosen as the safety position.
  • the pins 35 and 36 thus housed in the holes 45 and 46 of the cage 17 are ejected under the action of centrifugal force when this cage 17 rotates around the axis 2, but a timer element prevents this ejection during the first meters of the projectile's trajectory.
  • This timer element is produced, in accordance with the invention, in the form of an elastic spiral band or spiral spring 50 of axis 2, interposed between the outer peripheral face 18 of the cage 17 from which it is independent and the inner peripheral face 6 of the cavity 5 cu body 1, and which has a mass, a shape, a rigidity and a prestressing such that, at rest, that is to say when the cage 17 is stationary, the elastic spiral strip 50 is wound around the outer peripheral face 18 of the cage 17 and encloses it so as to be integral therewith by friction, and such that they then allow the following process of unwinding of the strip, according to which the person skilled in the art will easily determine the values to be given to this mass (in particular in terms of linear mass), this shape (in particular in terms of length of the strip), this rigidity and this prestressing imposed on the winding, in the factory, of the strip around the face 18 of cage 17.
  • the elastic spiral band 50 is completely wound around the outer peripheral face 18 of the cage 17, and retains the pins 35 and 36 in a position in which their ends 41 and 43 engage in the notches 48 and 49 of the gyroscopic rotor 30 then off-axis with respect to the axis 2, to ensure safety; the rotating cage 17, as well as the spiral band 50 which is then integral therewith, are then free to rotate about the axis 2 relative to the body 1 thanks to the pins 22 and 24 and to the clearance provided, parallel to the axis 2, between the respective faces, transverse to this axis, of the body 1 and the cage 17; it will be noted that, advantageously, the elastic band 50 has, parallel to the axis 2, a dimension at most equal to the dimension d separating the faces 19 and 20, the band 50 being wound around the face 18 in a position such that it does not form a projection relative to these faces 19 and 20.
  • the projectile and, with it, the rocket body 1 move in the direction 3 undergoing a powerful acceleration , whose value is for example of the order of 60,000 to 120,000 times the value of the Earth's field of attraction, and all the elements likely to move inside the body 1 are pressed backwards against any counterpart possible, by inertia; in particular, the cage 17 by its face 20 and the spring 50 are pressed towards the rear against the face 13 of the cavity 5, which provides them with a rearward support and ensures by friction their connection to the rotation around the axis 2 with the body 1; consequently, the elastic spiral strip 50, the cage 17 and the elements which it contains are rotated about the axis 2 at the same speed as the body 1, in the same direction 4, to reach the muzzle of the weapon tube a maximum speed of rotation which is for example of the order of 40,000 to 60,000 revolutions per minute, from a zero initial value.
  • FIGS. 1 and 3 This state of total solidarity of the various elements of the device with the body 1 is illustrated in FIGS. 1 and 3.
  • the acceleration in direction 3 ceases to be replaced by a deceleration, the value of which is for example of the order of 40 times the value of the terrestrial field of attraction; all the elements of the mobile device inside the body 1 then tend by inertia to move forward and come to be pressed against any possible counterpart and, in particular, the cage 17 crosses the game to come to apply towards the front, by its face 19, against the face 7 of the cavity 5 which provides it with support.
  • the outer turn of the spiral band 50 tends to disengage outward under the action of centrifugal force and to come to lie between the face 6 of the cavity 5 of the body 1, so that it s' there follows the total centrifugal unfolding of the spiral band 50, of which it will be noted that for this purpose, the winding is such that the zones of the spiral band respectively increasingly closer to axis 2 follow one another in direction 4 of gyration, determined by the direction of the stripes of the barrel of the weapon (figure 4).
  • the spiral strip 50 is completely wound against the outer peripheral face 6 of the cavity 5 and secured to the body 1 by friction due to centrifugal force, and the outer peripheral face 18 of the cage 17 is completely clear, in particular opposite the holes 45 and 46, the pins 35 and 36 of which can then be ejected under the action of centrifugal force, which in turn presses them against the inner turn of the strip 50 wound against the face 6, as shown in Figures 2 and 5; naturally, the dimensioning of the various elements of the device is established as a function of this possibility of release.
  • the device which has just been described can be produced in an extremely wide range of dimensions, and an indication of dimensions and tolerances corresponding to the use of the device will be found below, by way of non-limiting example.
  • device for sizes of the order of 30 to 155 mm these figures being themselves given by way of non-limiting example.
  • This example corresponds to the case of the use of a single elastic spiral band 50, as illustrated, but it will be noted that it would not go beyond the scope of the invention to replace this single elastic spiral band with a plurality of similar bands juxtaposed in the direction of the axis of gyration 2 and whose mass, shape, rigidity and prestressing are such that they enclose, so as to be joined by friction, the outer peripheral face 18 of the cage 17 at rest and as long as the latter undergoes, by pressing against the rear support face 13 of the body 1 and thereby joining it with the latter upon acceleration of the projectile in the weapon barrel, a joint gyration with the body at an increasing speed from the zero value to a maximum value, and further such that their respective external turns tend to be released under the action of centrifugal force for a value slightly less than or equal to this maximum value to then press against the inner peripheral face 6 of the body and secure by friction, to allow the above process to take place.
  • around the elastic spiral strip 50 can be wound at least one second elastic spiral strip having a mass, a shape, a stiffness and a prestress such that it is wound around the outer turn of the strip 50 and encloses it so as to be integral therewith by friction at rest and as long as the cage is subjected, by pressing against the rear bearing face 13 of the body 1 and thereby becoming integral by inertia with the latter at acceleration of the projectile in the weapon tube, a joint gyration with the body 1 at a speed increasing from the zero value to a maximum value, and in addition such that the external turn of this second spiral band tends to be released under the action of centrifugal force for a value slightly less than or equal to this maximum value to press against the inner peripheral face 6 of the body 1 and to be joined by friction under the conditions described above, so that , successively, this second strip then the strip 50, released by the latter, undergoing the above process come to be pressed against the inner peripheral face 6 of the body 1, by means of the second spiral strip as

Abstract

The security device of the invention comprises a movable organ in the interior of a cage mounted for rotation with respect to the body of a projectile, the movable organ being temporarily blocked from such rotation around the axis of gyration by at least one pin ejectable under the action of centrifugal force. Said pin is itself retained by an elastic spiral band enrolled upon the cage and which, as a result of a difference introduced into the speeds of respective rotation of the cage and of the body around the axis of gyration upon the exit of the projectile from the muzzle of the weapon, unwinds to liberate the pin. As a result, the movable organ after a trajectory of many tens of meters after the projectile has left the muzzle of the barrel of the weapon completes the pyrotechnic train which fires the projectile.

Description

La présente invention concerne un dispositif de sécurité à cage tournante pour projectile giratoire.The present invention relates to a rotating cage safety device for a revolving projectile.

Ces projectiles, porteurs d'une charge militaire, sont équipés d'un dispositif de mise à feu de celle-ci et, pour éviter que cette mise à feu se produise de façon intempestive pendant le stockage, l'alimentation dans l'arme, le trajet dans le tube d'arme lors du tir, et pendant les premiers mètres de la trajectoire du projectile hors de ce tube, sont également équipés de dispositifs de sécurité empêchant alors le fonctionnement du dispositif de mise à feu, pour n'autoriser celle-ci que lorsque le projectile a quitté le tube d'arme.These projectiles, carrying a military charge, are equipped with a device for firing the latter and, to prevent this firing from occurring inadvertently during storage, feeding into the weapon, the path in the weapon tube during firing, and during the first meters of the trajectory of the projectile out of this tube, are also equipped with safety devices then preventing the operation of the firing device, to not allow that -when when the projectile has left the weapon barrel.

On utilise par exemple à cet effet un rotor gyroscopique tendant à basculer, lors de la giration du projectile, d'une position dans laquelle son axe d'inertie fait un angle avec l'axe de giration de projectile et dans laquelle il interrompt une chaîne pyrotechnique de celui-ci, à une position dans laquelle les deux axes sont alignés et dans laquelle la continuité de la chaîne pyrotechnique est établie.For example, a gyroscopic rotor is used for this purpose which tends to tilt, during gyration of the projectile, from a position in which its axis of inertia makes an angle with the axis of gyration of the projectile and in which it interrupts a chain. pyrotechnic thereof, in a position in which the two axes are aligned and in which the continuity of the pyrotechnic chain is established.

L'alignement de l'axe d'inertie du rotor gyroscopique avec l'axe de giration du projectile tendant à se produire dès que le projectile est soumis à une giration, c'est-à-dire dès son tir, on souhaite prolonger la sécurité pendant un certain laps de temps après le tir, correspondant pour le projectile au parcours d'une distance de quelques mètres au sortir de la bouche de l'arme; à cet effet, on prévoit des moyens de verrouillage par goupille, clavette, ou tout autre dispositif analogue pour maintenir pendant le temps désiré, ou sur le parcours de la distance désirée, le rotor gyroscopique à l'état immobile par rapport au corps du projectile, ce qui d'une part maintient la sécurité et d'autre part assure l'entraînement du rotor à la rotation autour de l'axe de giration du projectile, nécessaire à l'obtention ultérieure d'un effet gyroscopique provoquant, après déverrouillage, le passage du rotor à sa position d'alignement de son axe d'inertie avec l'axe de giration; ce déverrouillage est commandé par un dispositif temporisateur horloger ou mécanique, déclenché par un dispositif accessoire, par exemple à inertie, à l'instant du tir.The alignment of the axis of inertia of the gyroscopic rotor with the axis of gyration of the projectile tends to occur as soon as the projectile is subjected to a gyration, that is to say from its firing, it is desired to extend the security for a certain period of time after firing, corresponding for the projectile to a distance of a few meters from the muzzle of the weapon; for this purpose, means of locking are provided by pin, key, or any other similar device for maintaining for the desired time, or over the course of the desired distance, the gyroscopic rotor in the stationary state relative to the body of the projectile. , which on the one hand maintains safety and on the other hand ensures the driving of the rotor to rotation around the axis of gyration of the projectile, necessary for the subsequent obtaining of a gyroscopic effect causing, after unlocking, passing the rotor to its position of alignment of its axis of inertia with the axis of gyration; this unlocking is controlled by a clock or mechanical timer device, triggered by an accessory device, for example with inertia, at the time of the firing.

Ces dispositifs sont complexes dès lors que l'on désire maintenir la sécurité sur plusieurs dizaines de mètres de la trajectoire du projectile à sa sortie de la bouche, et présentent un encombrement important réduisant leur domaine d'application à celui des projectiles de gros caliber; pour des projectiles de plus petit calibre, dans lesquels le volume disponible pour le dispositif de sécurité est réduit, on doit se limiter à l'utilisation, à titre de sécurité, soit de dispositifs efficaces sur des distances de l'ordre de 25 à 30 mètres en ne retenant que le percuteur, c'est-à-dire en ne fournissant qu'une sécurité précaire en cas de choc subi par le projectile pendant son stockage et sa manutention et en début de trajectoire, soit de dispositifs agissant certes par interruption d'une chaîne pyrotechnique et offrant par conséquent une sécurité accrue lors du stockage et de la manutention du projectile, ces dispositifs n'étant cependant efficaces que sur quelques mètres de trajectoire après la sortie du tube d'arme.These devices are complex when it is desired to maintain security over several tens of meters from the trajectory of the projectile when it leaves the mouth, and have a large size reducing their field of application to that of large caliber projectiles; for projectiles of smaller caliber, in which the volume available for the security device is reduced, one must limit oneself to the use, as a security, either of effective devices over distances of the order of 25 to 30 meters by retaining only the striker, that is to say by providing only precarious security in the event of an impact sustained by the projectile during its storage and handling and at the start of the trajectory, that is to say devices acting certainly by interruption of a pyrotechnic chain and therefore offering increased security during storage and handling of the projectile, these devices however being effective only over a few meters of trajectory after the exit from the barrel.

On se référera par exemple aux documents FR-A-2 233 593 et FR-A-2 293 688, ainsi qu'au brevet US-A-3 076 410.Reference will be made, for example, to documents FR-A-2 233 593 and FR-A-2 293 688, as well as to patent US-A-3 076 410.

Le but de la présente invention est de proposer un dispositif de sécurité pour projectile giratoire apte à fonctionner par interruption d'une chaîne pyrotechnique, ou encore par interruption d'un circuit électrique ou fluidique par exemple de mise à feu ou au contraire fermeture d'un circuit électrique d'alimentation de fonctions de sécurité, par conséquent de façon particulièrement efficace, et qui assure sous un encombrement réduit, avec des moyens simples, économiques et néanmoins fiables, une sécurité sur une distance de plusieurs dizaines de mètres après la sortie du projectile hors du tube d'arme.The aim of the present invention is to propose a safety device for a revolving projectile capable of operating by interrupting a pyrotechnic chain, or even by interrupting an electrical or fluidic circuit, for example firing or, on the contrary, closing an electrical circuit supplying security functions, therefore particularly efficiently, and which ensures, in a small footprint, with simple, economical and nevertheless reliable means, security over a distance of several tens of meters after leaving the projectile out of the weapon barrel.

A cet effet, le dispositif de sécurité selon l'invention, comportant de façon générale à l'intérieur du corps du projectile, dont l'axe de giration est défini, parallèlement à un sens de translation déterminé du projectile, un organe mobile tel que par exemple un rotor gyroscopique et au moins une goupille de verrouillage mobile, sous l'action de la force centrifuge consécutive à la giration du projectile, d'une position de verrouillage de l'organe mobile, dans laquelle elle coopère avec celui-ci occupant une position déterminée pour l'immobiliser dans cette position, à une position de libération de l'organe mobile dans laquelle cette coopération cesse, ainsi qu'au moins une bande spirale normalement enroulée et susceptible de se dérouler sous l'action de la force contri- fuge consécutive à la giration du projectile, comme il est connu en soi de FR-A-2 233 593, se caractérise en ce que ledit organe est mobile à l'intérieur d'une cage montée à la rotation libre autour de l'axe de giration par rapport au corps, à l'intérieur de celui-ci, par l'intermédiaire de moyens de montage autorisant un jeu de la cage à la translation par rapport au corps parallèlement à l'axe de giration, entre deux faces d'appui respectivement avant et arrière du corps si l'on se réfère au sens de translation du projectile, en ce que ladite goupille est montée à coulissement radial dans la cage, en référence à l'axe de giration, entre d'une part ladite position de verrouillage dans laquelle sa zone la plus proche de l'axe de giration coopère avec l'organe mobile, à l'intérieur de la cage, pour immobiliser cet organe dans ladite position déterminée par rapport à la cage et dans laquelle sa zone la plus éloignée de l'axe de giration affleure une face périphérique extérieure de la cage, cylindrique de révolution autour de l'axe de giration, et d'autre part ladite position de libération plus éloignée de l'axe de giration et dans laquelle sa zone la plus proche de celui-ci libère l'organe mobile, et en ce que ladite bande spirale est interposée entre ladite face périphérique extérieure de la cage et une face périphérique intérieure du corps et en ce qu'elle est élastique et présente une masse, une forme, une rigidité et une précontrainte qui sont telles qu'elle soit enroulée autour de la face périphérique extérieure de la cage et l'enserre de façon à en être solidaire par friction au repos et tant que celle-ci subit, en se solidarisant par inertie avec le corps à l'accélération du projectile dans le tube d'arme, une giration conjointe avec le corps à une vitesse croissant de la valeur nulle à une valeur maximale et telles que sa spire extérieure tende à se dégager sous l'action de la force centrifuge pour une valeur lègèrement inférieure ou égale à cette valeur maximale, pour se plaquer contre la face périphérique intérieure du corps et s'en solidariser par friction, de telle sorte que, à la sortie du projectile hors du tube d'arme, il se produise un déroulement centrifuge de la bande spirale élastique, avec libération de la goupille dans le sens d'un mouvement de sa position de verrouillage de l'organe mobile à sa position de libération de celui-ci.To this end, the safety device according to the invention, generally comprising inside the body of the projectile, whose axis of gyration is defined, parallel to a determined direction of translation of the projectile, a movable member such as for example a gyroscopic rotor and at least one movable locking pin, under the action of centrifugal force following the gyration of the projectile, from a locking position of the movable member, in which it cooperates with the occupant a determined position to immobilize it in this position, to a position of release of the movable member in which this cooperation ceases, as well as at least one spiral strip normally wound and capable of taking place under the action of the force contri - fuge consecutive to the gyration of the projectile, as is known per se from FR-A-2 233 593, is characterized in that said member is movable inside a cage mounted for free rotation around the axis of girati one with respect to the body, inside thereof, by means of mounting means allowing the play of the cage in translation relative to the body parallel to the axis of gyration, between two bearing faces respectively front and rear of the body if one refers to the direction of translation of the projectile, in that said pin is mounted to slide radially in the cage, with reference to the axis of gyration, between on the one hand said position of locking in which its zone closest to the axis of gyration cooperates with the movable member, inside the cage, to immobilize this member in said determined position relative to the cage and in which its most distant zone of the axis of gyration is flush with an external peripheral face of the cage, cylindrical of revolution around the axis of gyration, and on the other hand said release position more distant from the axis of gyration and in which its most close to it releases the movable member, and in that said spiral strip is interposed between said outer peripheral face of the cage and an inner peripheral face of the body and in that it is elastic and has a mass, a shape, a rigidity and a prestress which are such that it is wrapped around the external peripheral face of the cage and encloses it so as to be integral therewith by friction at rest and as long as the latter undergoes, by being joined by inertia with the body at l acceleration of the projectile in the weapon barrel, a joint gyration with the body at a speed increasing from the zero value to a maximum value and such that its outer whorl tends to be released under the action of centrifugal force for a value slightly less than or equal to this maximum value, to press against the inner peripheral face of the body and to be joined by friction, so that, at the exit of the projectile from the barrel, a centrifugal unwinding occurs of the elastic spiral band, with release of the pin in the direction of movement from its locking position of the movable member to its release position thereof.

On notera que l'on a déjà proposé d'utiliser des ressorts spiraux se déroulant sous l'action de la force centrifuge pour immobiliser directement un percuteur ou même, comme le décrit le brevet CH-A-432 300, un rotor gyroscopique sur lequel un tel ressort est enroulé directement; cependant, ces ressorts spiraux se déroulent dans les quelques premiers mètres de la trajectoire du projectile, après lesquels la sécurité disparaît; on a également proposé, dans le brevet US-A- 3 136 253, de ralentir la mise en nutation d'un rotor gyroscopique en le plaçant à l'intérieur d'une cage elle-même portée par le corps du projectile par l'intermédiaire d'un roulement à billes, l'inertie de la cage et du rotor opposant une résistance à leur entrainement à la rotation conjointe par le corps; on conçoit aisément que le déroulement du ressort spiral entre une cage tournante et le corps du projectile, préconisé selon l'invention, en introduisant un différentiel de vitesse entre ces derniers, permette de retarder le déroulement de la bande spirale élastique et de ce fait l'éjection de la goupille de verrouillage de l'organe mobile tel qu'un rotor gyroscopique par rapport à la cage, et par conséquent d'augmenter considérablement la distance de sécurité.Note that it has already been proposed to use spiral springs unwinding under the action of centrifugal force to directly immobilize a striker or even, as described in patent CH-A-432,300, a gyroscopic rotor on which such a spring is wound directly; however, these spiral springs take place within the first few meters of the projectile's trajectory, after which security disappears; it has also been proposed, in US Pat. No. 3,136,253, to slow down the setting in nutation of a gyroscopic rotor by placing it inside a cage itself carried by the body of the projectile by the through a ball bearing, the inertia of the cage and the rotor opposing a resistance to their training to the joint rotation by the body; it is easy to see that the unwinding of the spiral spring between a rotating cage and the body of the projectile, recommended according to the invention, by introducing a speed differential between the latter, makes it possible to delay the unwinding of the elastic spiral band and therefore l ejection of the locking pin from the movable member such as a gyroscopic rotor relative to the cage, and consequently considerably increase the safety distance.

D'autres details et avantages de l'invention ressortiront de la description ci-dessous, relative à un exemple de mise en oeuvre non limitatif, ainsi que des dessins annexés qui font partie intégrante de cette description.Other details and advantages of the invention will emerge from the description below, relating to an example of non-limiting implementation, as well as from the appended drawings which form an integral part of this description.

Cet exemple correspond au cas où l'on utilise un dispositif de sécurité selon l'invention pour immobiliser un rotor gyroscopique dans une position désaxée par rapport à l'axe de giration, le rotor se plaçant lorsqu'il est libéré dans une position dans laquelle il assure la continuité d'une chaîne pyrotechnique du projectile; toutefois, comme il a été dit plus haut, le domaine d'application de l'invention n'est pas limité au verrouillage momentané de tels rotors gyroscopiques, et on peut notamment l'appliquer dans l'établissement ou l'ouverture de circuits électriques ou fluidiques dans lesquels un rotor gyroscopique ou tout autre organe mobile fera office d'interrupteur.

  • La figure 1 montre une vue du dispositif selon l'invention en coupe par un plan axial, au repos ou lors de la phase d'accélération du projectile dans la bouche de l'arme.
  • La figure 2 montre une vue analogue, lors de la phase de décélération du projectile hors de la bouche de l'arme.
  • La figure 3 montre une vue en coupe selon le plan 11 t-t de la figure 1.
  • La figure 4 montre une vue analogue, dans la période de déroulement du ressort.
  • La figure 5 montre une vue du dispositif en coupe par le plan V-V de la figure 2.
This example corresponds to the case where a safety device according to the invention is used to immobilize a gyroscopic rotor in a position offset from the axis of gyration, the rotor being placed when it is released in a position in which it ensures the continuity of a pyrotechnic chain of the projectile; however, as has been said above, the field of application of the invention is not limited to momentary locking of such gyroscopic rotors, and it can in particular be applied in the establishment or opening of electrical circuits or fluidics in which a gyroscopic rotor or any other mobile member will act as a switch.
  • Figure 1 shows a view of the device according to the invention in section through an axial plane, at rest or during the acceleration phase of the projectile in the muzzle of the weapon.
  • Figure 2 shows a similar view, during the deceleration phase of the projectile outside the muzzle of the weapon.
  • FIG. 3 shows a sectional view along the plane 11 tt of FIG. 1.
  • Figure 4 shows a similar view, in the period of unwinding of the spring.
  • FIG. 5 shows a view of the device in section through the plane VV of FIG. 2.

On a désigné par 1 un corps de fusée, pour l'essentiel de révolution autour d'un axe 2 qui constitue son axe de giration lorsque, se déplaçant en translation dans un sens 3 déterminé parallèle à cet axe 2, il tourne sur lui-même dans un sens 4 qui est fonction du sens des rayures du tube d'arme au moyen duquel le projectile est tiré; le sens de giration 4 indiqué aux figures 3 à 5 correspondant au tir au moyen d'un canon dont le tube est rayé selon un pas à droite, à titre d'exemple non limitatif.A rocket body has been designated by 1, essentially of revolution around an axis 2 which constitutes its axis of gyration when, moving in translation in a direction 3 determined parallel to this axis 2, it turns on itself- even in a direction 4 which is a function of the direction of the scratches of the weapon tube by means of which the projectile is fired; the direction of gyration 4 indicated in FIGS. 3 to 5 corresponding to firing by means of a cannon, the tube of which is scored in a step to the right, by way of nonlimiting example.

Par convention, les sens 3 et 4 serviront de sens de référence dans la suite de la description, et, notamment, les termes «avant» et «arrière» utilisés par la suite s'entendront en référence au sens 3.By convention, the directions 3 and 4 will serve as a reference direction in the following description, and, in particular, the terms “front” and “rear” used subsequently will be understood with reference to the direction 3.

A son extrémité arrière, le corps 1 présente une forme tubulaire et définit intérieurement une cavité 5 ouverte vers l'arrière et délimitée à l'intérieur du corps 1 par une face périphérique intérieure 6 cylindrique de révolution autour de l'axe 2 et par une face avant 7 annulaire, plane, orientée transversalement par rapport à l'axe 2 et jointive par sa périphérie extérieure de la face 6 et par sa périphérie intérieure d'une face périphérique intérieure 8, cylindrique de révolution autour de l'axe 2 avec un diamètre inférieur à celui de la face 6, d'un orifice 9 débouchant centralement dans celle-ci et communiquant vers l'avant avec un canal 1 0 aménagé dans le corps 1 en vue du guidage d'un percuteur 11 selon l'axe 2, d'une position avant d'armement dans laquelle il est illustré à une position arrière de percussion, en saillie à l'intérieur de la cavité 5, qu'il ne peut gagner qu'après que le dispositif de sécurité selon l'invention a fonctionné.At its rear end, the body 1 has a tubular shape and internally defines a cavity 5 open towards the rear and delimited inside the body 1 by an inner peripheral face 6 cylindrical of revolution around the axis 2 and by a annular front face 7, planar, oriented transversely with respect to axis 2 and joined by its outer periphery of face 6 and by its inner periphery of an inner peripheral face 8, cylindrical of revolution around axis 2 with a diameter smaller than that of the face 6, of an orifice 9 opening centrally therein and communicating forward with a channel 1 0 arranged in the body 1 for the guidance of a striker 11 along the axis 2 , from a front cocking position in which it is illustrated to a rear percussion position, projecting inside the cavity 5, which it can only gain after the safety device according to the invention has worked.

A l'intérieur de la cavité 5, le corps 1 porte de façon solidaire un culot 12 remarquable en ce qu'il présente vers l'avant une face annulaire plane 13, orientée transversalement par rapport à l'axe 2, jointive par sa périphérie extérieure de la face 6 de la cavité 5 et par sa périphérie intérieure d'une face périphérique intérieure 14, cylindrique de révolution autour de l'axe 2, d'un orifice 15 du culot 12, débouchant vers l'avant dans cette face 13 et vers l'arrière en regard d'un relais pyrotechnique 16 porté de façon solidaire par le culot 12, en arrière de la face 13; la face 13 définit ainsi pour la cavité 5 une face arrière.Inside the cavity 5, the body 1 integrally carries a base 12 which is remarkable in that it has a plane annular face 13 forwardly, oriented transversely with respect to the axis 2, contiguous by its periphery outside of the face 6 of the cavity 5 and through its inner periphery of an inner peripheral face 14, cylindrical of revolution around the axis 2, of an orifice 15 of the base 12, opening forward in this face 13 and towards the rear opposite a pyrotechnic relay 16 carried integrally by the base 12, behind the face 13; the face 13 thus defines for the cavity 5 a rear face.

A l'intérieur de la cavité 5 ainsi définie par les faces 6, 7, 13 est montée conformément à l'invention une cage 17 qui est délimitée, si l'on se réfère à l'état monté du dispositif, par une face périphérique extérieure 18 cylindrique de révolution autour de l'axe 2 et par deux faces annulaires, planes, orientées transversalement par rapport à cet axe 2 et jointives de la face 18 par leur périphérie extérieure respective, à raison d'une face avant 19, tournée vers l'avant et par conséquent placée en regard de la face avant 7 de la cavité 5, et d'une face arrière 20 tournée vers l'arrière et par conséquent placée en regard de la face arrière 13 de la cavité 5; à cet effet, le diamètre de la face 18, qui définit le diamètre extérieur des faces 19 et 20, est intermédiaire entre le diamètre de la face 6, d'une part, et les diamètres respectifs des faces 8 et 14, d'autre part.Inside the cavity 5 thus defined by the faces 6, 7, 13 is mounted in accordance with the invention a cage 17 which is delimited, if one refers to the assembled state of the device, by a peripheral face outer 18 cylindrical of revolution around the axis 2 and by two annular faces, pla nes, oriented transversely to this axis 2 and contiguous with the face 18 by their respective outer periphery, at the rate of a front face 19, facing forward and therefore placed opposite the front face 7 of the cavity 5, and a rear face 20 turned towards the rear and consequently placed opposite the rear face 13 of the cavity 5; for this purpose, the diameter of the face 18, which defines the outside diameter of the faces 19 and 20, is intermediate between the diameter of the face 6, on the one hand, and the respective diameters of the faces 8 and 14, on the other hand go.

On remarquera que, conformément à l'invention, la distance d séparant parallèlement à l'axe 2 les faces 19 et 20 est inférieure d'une valeur à à la distance entre les faces 7 et 13, mesurée de la même façon.It will be noted that, according to the invention, the distance d separating the faces 19 and 20 parallel to the axis 2 is less than the value between the faces 7 and 13, measured in the same way.

Par sa périphérie intérieure, la face 19 de la cage 17 est adjacente à une face périphérique extérieure 21, cylindrique de révolution autour de l'axe 2 avec un diamètre étroitement voisin de celui de la face périphérique intérieure 8 de l'orifice 9, d'un tourillon 22 que la cage 17 porte de façon solidaire, en saillie vers l'avant par rapport à sa face 19, et qui s'engage dans l'orifice 9 pour assurer, par contact glissant entre les faces 8 et 9, un guidage de la cage 17 à la rotation autour de l'axe 2 par rapport au corps 1; de même, la face 20 de la cage 17 est adjacente, par sa périphérie intérieure, à une face périphérique extérieure 23, cylindrique de révolution autour de l'axe 2 avec un diamètre aussi voisin que possible de celui de la face 14, d'un tourillon 24 que la cage 17 porte en saillie vers l'arrière par rapport à cette face 20 et qui s'engage dans l'orifice 15 de façon à assurer également un tel guidage à la rotation relative, par contact glissant mutuel des faces 23 et 14.By its inner periphery, the face 19 of the cage 17 is adjacent to an outer peripheral face 21, cylindrical of revolution around the axis 2 with a diameter closely similar to that of the inner peripheral face 8 of the orifice 9, d 'a pin 22 which the cage 17 carries integrally, projecting towards the front relative to its face 19, and which engages in the orifice 9 to ensure, by sliding contact between the faces 8 and 9, a guiding the cage 17 in rotation about the axis 2 relative to the body 1; similarly, the face 20 of the cage 17 is adjacent, by its internal periphery, to an external peripheral face 23, cylindrical of revolution around the axis 2 with a diameter as close as possible to that of the face 14, a pin 24 which the cage 17 projects projecting rearwardly relative to this face 20 and which engages in the orifice 15 so as to also provide such guidance for relative rotation, by mutual sliding contact of the faces 23 and 14.

Vers l'avant, la face périphérique extérieure 21 du tourillon 22 est adjacente à la pérphérie extérieure d'une face annulaire 25, transversale par rapport à l'axe 2, délimitant le tourillon 22 vers l'avant alors que, vers l'arrière, la face périphérique extérieure 23 du tourillon 24 est adjacente à la périphérie extérieure d'une face annulaire 26, transversale par rapport à l'axe 2, délimitant ce tourillon 24 vers l'arrière, et la distance séparant respectivement la face 25 de la face 19 et la face 26 de la face 20 parallèlement à l'axe 2 est supérieure au jeu et inférieure respectivement à la longueur de la face 8 ou à celle de la face 14, mesurée parallèlement à l'axe 2, de telle sorte que la cage 17 et le corps 1 puissent subir une translation relative suivant cet axe, dans un sens ou dans l'autre, dans les limites du jeu l, sans subir d'entraves et en conservant une coaxialité aussi bonne que possible, par coulissement relatif des faces 21 et 8 et des faces 23 et 14 parallèlement à t'axe 2.Forward, the outer peripheral face 21 of the pin 22 is adjacent to the outer periphery of an annular face 25, transverse with respect to the axis 2, delimiting the pin 22 towards the front while, towards the rear , the outer peripheral face 23 of the pin 24 is adjacent to the outer periphery of an annular face 26, transverse with respect to the axis 2, delimiting this pin 24 towards the rear, and the distance separating respectively the face 25 of the face 19 and the face 26 of the face 20 parallel to the axis 2 is greater than the clearance and respectively less than the length of the face 8 or that of the face 14, measured parallel to the axis 2, so that the cage 17 and the body 1 can undergo a relative translation along this axis, in one direction or the other, within the limits of the clearance l, without being hampered and maintaining as good coaxiality as possible, by relative sliding faces 21 and 8 and faces 23 and 14 parallel to axis 2.

Les tourillons 22 et 24 sont creux et, par leur - périphérie intérieure respective, les faces 25 et 26 sont jointives d'une face périphérique intérieure, respectivement 27 ou 28, cylindrique de révolution autour de l'axe 2, débouchant à l'intérieur de la cage 17 dans un logement 29 constituant un palier assurant le guidage, à la rotation en tous sens autour d'un centre C situé sur l'axe 2 et dans toute la mesure du possible fixe par rapport à la cage tournante 17, pour un rotor gyroscopique 30.The pins 22 and 24 are hollow and, by their respective inner periphery, the faces 25 and 26 are contiguous with an inner peripheral face, respectively 27 or 28, cylindrical of revolution around the axis 2, opening inside of the cage 17 in a housing 29 constituting a bearing ensuring the guiding, in rotation in all directions around a center C located on the axis 2 and as far as possible fixed relative to the rotating cage 17, for a gyroscopic rotor 30.

A cet effet, le logement 29 présente une face périphérique intérieure présentant une enveloppe intérieure sphérique de centre C, et le rotor gyroscopique 30 présente une face périphérique extérieure 31 également sphérique, avec un diamètre aussi voisin que possibile du diamètre de cette enveloppe de telle sorte que le centre de cette face 31 coïncide de façon aussi précise que possible avec le centre C, et soit en tout cas placé aussi exactement que possible sur l'axe 2.For this purpose, the housing 29 has an inner peripheral face having a spherical inner envelope with center C, and the gyroscopic rotor 30 has an outer peripheral face 31 also spherical, with a diameter as close as possible to the diameter of this envelope so that the center of this face 31 coincides as precisely as possible with the center C, and is in any case placed as exactly as possible on the axis 2.

Le rotor gyroscopique 30 présente un axe d'inertie propre 32 et est percé de part en part, suivant cet axe, d'un canal 33 à l'intérieur duquel est logée une amorce 34, la forme et les dimensions du canal 33 en coupe transversale par rapport à l'axe 32 et le diamètre de la face périphérique intérieure 27 du tourillon étant propres à permettre le passage du percuteur 11 vers sa position de percussion, lorsque l'axe 32 coïncide avec l'axe 2 dans une position privilégiée du rotor gyroscopique 30 à l'intérieur de la cage 17, position que le rotor tend à gagner dès lors qu'il est animé d'un mouvement de rotation autour de l'axe 2; dans cette position, le rotor établit la continuité d'une chaîne pyrotechnique incluant le percuteur 11, le tourillon 22, le canal 33 avec l'amorce 34, le tourillon 24 et le relais de mise à feu 16.The gyroscopic rotor 30 has its own axis of inertia 32 and is pierced right through, along this axis, with a channel 33 inside which is housed a primer 34, the shape and dimensions of the channel 33 in section transverse to the axis 32 and the diameter of the inner peripheral face 27 of the pin being suitable for allowing the passage of the striker 11 towards its percussion position, when the axis 32 coincides with the axis 2 in a privileged position of the gyroscopic rotor 30 inside the cage 17, position that the rotor tends to gain as soon as it is rotated around the axis 2; in this position, the rotor establishes the continuity of a pyrotechnic chain including the striker 11, the pin 22, the channel 33 with the primer 34, the pin 24 and the firing relay 16.

Pour établir une sécurité par interruption de cette chaîne pyrotechnique pendant le stockage, l'alimentation dans l'arme, le trajet dans le tube d'arme, et pendant les premiers mètres de la trajectoire du projectile, le rotor 30 est retenu dans une position dans laquelle son axe d'inertie propre 32 est décalé angulairement par rapport à l'axe 2, en référence au centre C, c'est-à-dire dans une position dans laquelle son canal 33 n'est pas placé en regard du percuteur 11, par des moyens de verrouillage qui vont être décrits à présent.To establish safety by interrupting this pyrotechnic chain during storage, feeding into the weapon, the path in the weapon barrel, and during the first meters of the trajectory of the projectile, the rotor 30 is retained in a position in which its own axis of inertia 32 is angularly offset with respect to axis 2, with reference to the center C, that is to say in a position in which its channel 33 is not placed opposite the striker 11, by locking means which will now be described.

Ces moyens de verouillage comportent notamment au moins une goupille orientée radialement par rapport à l'axe 2, et de préférence une pluralité de telles goupilles orientées radialement par rapport à l'axe 2 et régulièrement réparties angulairement en référence à celui-ci, pour immobiliser temporairement le rotor à l'intérieur de la cage 17 dans une position désaxée.These locking means comprise in particular at least one pin oriented radially with respect to the axis 2, and preferably a plurality of such pins oriented radially with respect to the axis 2 and regularly distributed angularly with reference thereto, for immobilizing temporarily the rotor inside the cage 17 in an off-center position.

Dans l'exemple illustré, il est ainsi prévu deux goupilles 35 et 36 dont chacune présente une face périphérique extérieure, respectivement 37 ou 38, cylindrique de révolution autour d'un axe propre, respectivement 39 ou 40, et deux faces d'extrémité, respectivement 41, 42 et 43, 44, orientées transversalement par rapport à cet axe propre.In the example illustrated, two pins 35 and 36 are thus provided, each of which has an external peripheral face, respectively 37 or 38, cylindrical of revolution about an own axis, respectively 39 or 40, and two end faces, respectively 41, 42 and 43, 44, oriented transversely to this own axis.

Pour assurer l'immobilisation du rotor 30 par rapport à la cage 17 en position désaxée, ces goupilles 35 et 36 sont retenues dans des trous respectifs 45 et 46, cylindriques de révolution autour d'un même axe 47 perpendiculaire à l'axe 2, que la cavité 17 présente entre ses faces 19 et 0, et qui joignent la face périphérique extérieure 18 de la cage 17 au logement intérieur 29 de celle-ci; les logements 45 et 46 présentent un diamètre intérieur complémentaire des diamètres respectifs des faces 37 et 38 des goupilles 35 et 36, pour recevoir celles-ci à coulissement suivant l'axe 47, dans une position dans laquelle se confondent avec cet axe 47 les axes respectifs 39 et 40 des goupilles.To immobilize the rotor 30 relative to the cage 17 in the offset position, these pins 35 and 36 are retained in respective holes 45 and 46, cylindrical of revolution around the same axis 47 perpendicular to the axis 2, that the cavity 17 has between its faces 19 and 0, and which join the outer peripheral face 18 of the cage 17 to the inner housing 29 thereof; the housings 45 and 46 have an inner diameter complementary to the respective diameters of the faces 37 and 38 of the pins 35 and 36, to receive the latter sliding along the axis 47, in a position in which the respective axes merge with this axis 47 39 and 40 pins.

La longueur des goupilles, mesurée entre les faces 41 et 42 et entre les faces 43 et 44 parallèlement à leur axe respectif, est telle que, lorsqu'elles sont engagées dans un trou respectif 45 ou 46 de la cage 17 dans une position dans laquelle l'une de leurs extrémités, respectivement 42 ou 44, affleure la face périphérique extérieure 18 de la cage 17, leur autre extrémité, respectivement 41 ou 43, située plus près de l'axe 2, pénètre à l'intérieur de l'enveloppe intérieure sphérique du logement 29 et s'engage dans une encoche, respectivement 48 ou 49, que présente à cet effet, respectivement en regard du trou 45 ou en regard du trou 46 suivant l'axe 47, la face périphérique extérieure 31 du rotor gyroscopique 30 lorsque celui-ci occupe la position de désaxement de son axe d'inertie propre 32 par rapport à l'axe de giration 2 du corps 1 choisie comme position de sécurité.The length of the pins, measured between the faces 41 and 42 and between the faces 43 and 44 parallel to their respective axis, is such that, when they are engaged in a respective hole 45 or 46 of the cage 17 in a position in which one of their ends, respectively 42 or 44, is flush with the outer peripheral face 18 of the cage 17, their other end, respectively 41 or 43, located closer to the axis 2, penetrates inside the envelope spherical interior of the housing 29 and engages in a notch, respectively 48 or 49, which has for this purpose, respectively opposite the hole 45 or opposite the hole 46 along the axis 47, the outer peripheral face 31 of the gyroscopic rotor 30 when the latter occupies the offset position of its own axis of inertia 32 relative to the axis of gyration 2 of the body 1 chosen as the safety position.

Les goupilles 35 et 36 ainsi logées dans les trous 45 et 46 de la cage 17 sont éjectables sous l'action de la force centrifuge lorsque cette cage 17 tourne autour de l'axe 2, mais un élément temporisateur s'oppose à cette éjection pendant les premiers mètres de la trajectoire du projectile.The pins 35 and 36 thus housed in the holes 45 and 46 of the cage 17 are ejected under the action of centrifugal force when this cage 17 rotates around the axis 2, but a timer element prevents this ejection during the first meters of the projectile's trajectory.

Cet élément temporisateur est réalisé, conformément à l'invention, sous la forme d'une bande spirale élastique ou ressort spiral 50 d'axe 2, interposé entre la face périphérique extérieure 18 de la cage 17 dont elle est indépendante et la face périphérique intérieure 6 de la cavité 5 cu corps 1, et qui présente une masse, une forme, une rigidité et une précontrainte telles que, au repos, c'est-à-dire lorsque la cage 17 est immobile, la bande spirale élastique 50 soit enroulée autour de la face périphérique extérieure 18 de la cage 17 et l'enserre de façon à en être solidaire par friction, et telles qu'elles autorisent ensuite le processus de déroulement suivant de la bande, en fonction duquel l'homme du métier déterminera aisément les valeurs à donner à cette masse (notamment en termes de masse linéaire), cette forme (notamment en termes de longueur de la bande), cette rigidité et cette précontrainte imposée à l'enroulement, en usine, de la bande autour de la face 18 de la cage 17.This timer element is produced, in accordance with the invention, in the form of an elastic spiral band or spiral spring 50 of axis 2, interposed between the outer peripheral face 18 of the cage 17 from which it is independent and the inner peripheral face 6 of the cavity 5 cu body 1, and which has a mass, a shape, a rigidity and a prestressing such that, at rest, that is to say when the cage 17 is stationary, the elastic spiral strip 50 is wound around the outer peripheral face 18 of the cage 17 and encloses it so as to be integral therewith by friction, and such that they then allow the following process of unwinding of the strip, according to which the person skilled in the art will easily determine the values to be given to this mass (in particular in terms of linear mass), this shape (in particular in terms of length of the strip), this rigidity and this prestressing imposed on the winding, in the factory, of the strip around the face 18 of cage 17.

Au repos, c'est-à-dire lors du stockage et de l'alimentation dans l'arme, la bande spirale élastique 50 est intégralement enroulée autour de la face périphérique extérieure 18 de la cage 17, et retient les goupilles 35 et 36 dans une position dans laquelle leurs extrémités 41 et 43 s'engagent dans les encoches 48 et 49 du rotor gyroscopique 30 alors désaxé par rapport à l'axe 2, pour assurer la sécurité; la cage tournante 17, ainsi que la bande spirale 50 qui en est alors solidaire, sont alors libres à la rotation autour de l'axe 2 par rapport au corps 1 grâce aux tourillons 22 et 24 et au jeu ménagé, parallèlement à l'axe 2, entre les faces respectives, transversales par rapport à cet axe, du corps 1 et de la cage 17; on notera que, avantageusement, la bande élastique 50 présente parallèlement à l'axe 2 une dimension au plus égale à la dimension d séparant les faces 19 et 20, la bande 50 étant enroulée autour de la face 18 dans une position telle qu'elle ne forme pas de saillie par rapport à ces faces 19 et 20.At rest, that is to say during storage and feeding in the weapon, the elastic spiral band 50 is completely wound around the outer peripheral face 18 of the cage 17, and retains the pins 35 and 36 in a position in which their ends 41 and 43 engage in the notches 48 and 49 of the gyroscopic rotor 30 then off-axis with respect to the axis 2, to ensure safety; the rotating cage 17, as well as the spiral band 50 which is then integral therewith, are then free to rotate about the axis 2 relative to the body 1 thanks to the pins 22 and 24 and to the clearance provided, parallel to the axis 2, between the respective faces, transverse to this axis, of the body 1 and the cage 17; it will be noted that, advantageously, the elastic band 50 has, parallel to the axis 2, a dimension at most equal to the dimension d separating the faces 19 and 20, the band 50 being wound around the face 18 in a position such that it does not form a projection relative to these faces 19 and 20.

Au moment du tir, et lors de son parcours dans le tube d'arme, supposé rayé à droite dans l'exemple illustré, le projectile et, avec lui, le corps de fusée 1 se déplacent dans le sens 3 en subissant une accélération puissante, dont la valeur est par exemple de l'ordre de 60.000 à 120.000 fois la valeur du champ d'attraction terrestre, et tous les éléments susceptibles de se déplacer à l'intérieur du corps 1 viennent se plaquer vers l'arrière contre toute contrepartie possible, par inertie; notamment, la cage 17 par sa face 20 et le ressort 50 viennent se plaquer vers l'arrière contre la face 13 de la cavité 5, qui leur fournit un appui vers l'arrière et assure par friction leur solidarisation à la rotation autour de l'axe 2 avec le corps 1; par conséquent, la bande spirale élastique 50, la cage 17 et les éléments que celle-ci contient sont entraînés à la rotation autour de l'axe 2 à la même vitesse que le corps 1, dans le même sens 4, pour atteindre à la bouche du tube d'arme une vitesse de rotation maximale qui est par exemple de l'ordre de 40.000 à 60.000 tours par minute, à partir d'une valeur initiale nulle.At the time of the firing, and during its course in the weapon tube, supposedly scratched on the right in the example illustrated, the projectile and, with it, the rocket body 1 move in the direction 3 undergoing a powerful acceleration , whose value is for example of the order of 60,000 to 120,000 times the value of the Earth's field of attraction, and all the elements likely to move inside the body 1 are pressed backwards against any counterpart possible, by inertia; in particular, the cage 17 by its face 20 and the spring 50 are pressed towards the rear against the face 13 of the cavity 5, which provides them with a rearward support and ensures by friction their connection to the rotation around the axis 2 with the body 1; consequently, the elastic spiral strip 50, the cage 17 and the elements which it contains are rotated about the axis 2 at the same speed as the body 1, in the same direction 4, to reach the muzzle of the weapon tube a maximum speed of rotation which is for example of the order of 40,000 to 60,000 revolutions per minute, from a zero initial value.

Cet état de totale solidarité des différents éléments du dispositif avec le corps 1 est illustré aux figures 1 et 3.This state of total solidarity of the various elements of the device with the body 1 is illustrated in FIGS. 1 and 3.

Dés le franchissement de la bouche, l'accélération dans le sens 3 cesse pour être remplacée par une décélération dont la valeur est par exemple de l'ordre de 40 fois la valeur du champ d'attraction terrestre; tous les éléments du dispositif mobiles à l'intérieur du corps 1 tendent alors par inertie à se déplacer vers l'avant et viennent se plaquer contre toute contrepartie possible et, notamment, la cage 17 franchit le jeu pour venir s'appliquer vers l'avant, par sa face 19, contre la face 7 de la cavité 5 qui lui fournit un appui.As soon as the mouth is crossed, the acceleration in direction 3 ceases to be replaced by a deceleration, the value of which is for example of the order of 40 times the value of the terrestrial field of attraction; all the elements of the mobile device inside the body 1 then tend by inertia to move forward and come to be pressed against any possible counterpart and, in particular, the cage 17 crosses the game to come to apply towards the front, by its face 19, against the face 7 of the cavity 5 which provides it with support.

Simultanément, la spire extérieure de la bande spirale 50 tend à se dégager vers l'extérieur sous l'action de la force centrifuge et à venir se plaquer entre la face 6 de la cavité 5 du corps 1, si bien qu'il s'en suit le déroulement centrifuge total de la bande spirale 50 dont on notera qu'à cet effet, l'enroulement est tel que les zones de la bande spirale respectivement de plus en plus proches de l'axe 2 se succèdent dans le sens 4 de giration, déterminé par le sens des rayures du canon de l'arme (figure 4).Simultaneously, the outer turn of the spiral band 50 tends to disengage outward under the action of centrifugal force and to come to lie between the face 6 of the cavity 5 of the body 1, so that it s' there follows the total centrifugal unfolding of the spiral band 50, of which it will be noted that for this purpose, the winding is such that the zones of the spiral band respectively increasingly closer to axis 2 follow one another in direction 4 of gyration, determined by the direction of the stripes of the barrel of the weapon (figure 4).

A la fin de ce processus, la bande spirale 50 est intégralement enroulée contre la face périphérique extérieure 6 de la cavité 5 et solidaire du corps 1 par friction du fait de la force centrifuge, et la face périphérique extérieure 18 de la cage 17 est totalement dégagée, notamment en regard des trous 45 et 46 dont les goupilles 35 et 36 peuvent être alors éjectées sous l'action de la force centrifuge, qui les plaque à leur tour contre la spire intérieure de la bande 50 enroulée contre la face 6, comme le montrent les figures 2 et 5; naturellement, le dimensionnement des différents éléments du dispositif est établi en fonction de cette possibilité de dégagement.At the end of this process, the spiral strip 50 is completely wound against the outer peripheral face 6 of the cavity 5 and secured to the body 1 by friction due to centrifugal force, and the outer peripheral face 18 of the cage 17 is completely clear, in particular opposite the holes 45 and 46, the pins 35 and 36 of which can then be ejected under the action of centrifugal force, which in turn presses them against the inner turn of the strip 50 wound against the face 6, as shown in Figures 2 and 5; naturally, the dimensioning of the various elements of the device is established as a function of this possibility of release.

Lors de ce mouvement des goupilles 35 et 36, leurs extrémités respectives 48 et 49 initialement les plus proches de l'axe 2 accomplissent un mouvement centrifuge et, au cours de ce mouvement, se dégagent des encoches 48 et 49 du rotor gyroscopique 30, alors libéré vis-à-vis d'un mouvement gyroscopique à l'intérieur de son logement 29 dans la cage 17, l'amenant dans une position d'alignement de son axe d'inertie propre 32 avec l'axe de giration 2.During this movement of the pins 35 and 36, their respective ends 48 and 49 initially closest to the axis 2 perform a centrifugal movement and, during this movement, emerge from the notches 48 and 49 of the gyroscopic rotor 30, then released vis-à-vis a gyroscopic movement inside its housing 29 in the cage 17, bringing it into a position of alignment of its own axis of inertia 32 with the axis of gyration 2.

Naturellement, le dispositif qui vient d'être décrit peut être réalisé dans une gamme de dimensions extrêmement large, et on trouvera ci-dessous, à titre d'exemple non limitatif, une indication de cotes et de tolérances correspondant à la mise en oeuvre du dispositif pour des calibres de l'ordre de 30 à 155 mm, ces chiffres étant eux- mêmes donnés à titre d'exemple non limitatif.Naturally, the device which has just been described can be produced in an extremely wide range of dimensions, and an indication of dimensions and tolerances corresponding to the use of the device will be found below, by way of non-limiting example. device for sizes of the order of 30 to 155 mm, these figures being themselves given by way of non-limiting example.

Les valeurs ci-dessous sont établies en référence au diamètre a du rotor gyroscopique 30:

  • - diamètre a du rotor 30: de 6 à 20 mm;
  • - jeu du rotor 30 dans son logement 29 de la cage tournante 17: de 0,7 à 1,5% de a;
  • - diamètre de la face périphérique extérieure 23 du tourillon 24 et de la face périphérique intérieure 14 de l'orifice 15: b = a;
  • - diamètre de la face périphérique extérieure 21 du tourillon 22 et de la face périphérique intérieure 8 de l'orifice 9: c = a/2;
  • - diamètre de la face périphérique extérieure 18 de la cage tournante 17: e = 4/3 a;
  • - diamètre extérieur de la bande spirale élastique 50 à l'état enroulé autour de la face périphérique extérieure 18 de la cage tournante 17: f = 9/5 a;
  • - diamètre de la face périphérique extérieure 6 de la cavité 5: g = 7/3 a;
  • - distance entre les faces 19 et 20 de la cage tournante 17: d = a;
  • - valeur du jeu entre la cage tournante 17 et le corps 1 parallèlement à l'axe 2: = de 1,5 à 4% de a;
  • - longueur d'une goupille 35 ou 36, mesurée parallèlement à son axe respectif 39 ou 40: h = 2/5 a; -
  • - diamètre de la face périphérique extérieure 37 ou 38 d'une goupille 35 ou 36: i = a/7;
  • - distance séparant l'axe 47 des trous 45 et 46 du centre C du logement 29, parallèlement à l'axe 2: k = 4/10 a (l'axe 47 étant situé entre le centre C et la face 19 de la cage 17);
  • - jeu des tourillons et goupilles dans les orifices ou trous respectifs: de 0,7 à 1,5% de a;
  • - état de surface: Ra 1,6
  • - épaisseur de la bande spirale élastique 50: 25 microns;
  • - longueur déroulée de la bande spirale 50: de 2 à 3 mètres.
The values below are established with reference to the diameter a of the gyroscopic rotor 30:
  • - diameter a of the rotor 30: from 6 to 20 mm;
  • - clearance of the rotor 30 in its housing 29 of the rotating cage 17: from 0.7 to 1.5% of a;
  • - Diameter of the outer peripheral face 23 of the pin 24 and of the inner peripheral face 14 of the orifice 15: b = a;
  • - Diameter of the outer peripheral face 21 of the pin 22 and of the inner peripheral face 8 of the orifice 9: c = a / 2;
  • - diameter of the outer peripheral face 18 of the rotating cage 17: e = 4/3 a;
  • - outer diameter of the elastic spiral band 50 in the wound state around the outer peripheral face 18 of the rotating cage 17: f = 9/5 a;
  • - diameter of the outer peripheral face 6 of the cavity 5: g = 7/3 a;
  • - distance between the faces 19 and 20 of the rotating cage 17: d = a;
  • - value of the clearance between the rotating cage 17 and the body 1 parallel to the axis 2: = from 1.5 to 4% of a;
  • - length of a pin 35 or 36, measured parallel to its respective axis 39 or 40: h = 2/5 a; -
  • - diameter of the outer peripheral face 37 or 38 of a pin 35 or 36: i = a / 7;
  • - distance separating the axis 47 from the holes 45 and 46 from the center C of the housing 29, parallel to the axis 2: k = 4/10 a (the axis 47 being located between the center C and the face 19 of the cage 17);
  • - play of pins and pins in the respective holes or holes: from 0.7 to 1.5% of a;
  • - surface finish: Ra 1.6
  • - thickness of the elastic spiral band 50: 25 microns;
  • - unrolled length of the spiral strip 50: from 2 to 3 meters.

Cet exemple correspond au cas de l'utilisation d'une bande spirale élastique 50 unique, comme il est illustré, mais on notera que l'on ne sortirait pas du cadre de l'invention en remplaçant cette bande spirale élastique unique par une pluralité de bandes analogues juxtaposées suivant la direction de l'axe de giration 2 et dont la masse, la forme, la rigidité et la précontrainte seraient telles qu'elles enserrent, de façon à en être solidaires par friction, la face périphérique extérieure 18 de la cage 17 au repos et tant que celle-ci subit, en se plaquant contre la face d'appui arrière 13 du corps 1 et en se solidarisant de ce fait avec celui-ci à l'accélération du projectile dans la tube d'arme, une giration conjointe avec le corps à une vitesse croissant de la valeur nulle à une valeur maximale, et en outre telles que leur spire extérieure respective tende à se dégager sous l'action de la force centrifuge pour une valeur légèrement inférieure ou égale à cette valeur maximale pour se plaquer alors contre la face périphérique intérieure 6 du corps et s'en solidariser par friction, pour autoriser le déroulement du processus ci-dessus.This example corresponds to the case of the use of a single elastic spiral band 50, as illustrated, but it will be noted that it would not go beyond the scope of the invention to replace this single elastic spiral band with a plurality of similar bands juxtaposed in the direction of the axis of gyration 2 and whose mass, shape, rigidity and prestressing are such that they enclose, so as to be joined by friction, the outer peripheral face 18 of the cage 17 at rest and as long as the latter undergoes, by pressing against the rear support face 13 of the body 1 and thereby joining it with the latter upon acceleration of the projectile in the weapon barrel, a joint gyration with the body at an increasing speed from the zero value to a maximum value, and further such that their respective external turns tend to be released under the action of centrifugal force for a value slightly less than or equal to this maximum value to then press against the inner peripheral face 6 of the body and secure by friction, to allow the above process to take place.

Selon une autre variante, autour de la bande spirale élastique 50 peut être enroulée au moins une deuxième bande spirale élastique présentant une masse, une forme, une rigidité et une précontrainte telles qu'elle soit enroulée autour de la spire extérieure de la bande 50 et l'enserre de façon à en être solidaire par friction au repos et tant que la cage subit, en se plaquant contre la face d'appui arrière 13 du corps 1 et en se solidarisant de ce fait par inertie avec celui-ci à l'accélération du projectile dans le tube d'arme, une giration conjointe avec le corps 1 à une vitesse croissant de la valeur nulle à une valeur maximale, et en outre telles que la spire extérieure de cette deuxième bande spirale tende à se dégager sous l'action de la force centrifuge pour une valeur lègèrement inférieure ou égale à cette valeur maximale pour se plaquer contre la face périphérique intérieure 6 du corps 1 et s'en solidariser par friction dans les conditions décrites ci-dessus, de telle sorte que, successivement, cette deuxième bande puis la bande 50, libérée par celle-ci, subissant le processus ci-dessus viennent se plaquer contre la face périphérique intérieure 6 du corps 1, par l'intermédiaire de la deuxième bande spirale en ce qui concerne la bande spirale 50; on peut alors réaliser les deux bandes spirales en des matériaux différents tels que l'aluminium pour la bande intérieure et le laiton pour la bande extérieure, ou encore des matières plastiques.According to another variant, around the elastic spiral strip 50 can be wound at least one second elastic spiral strip having a mass, a shape, a stiffness and a prestress such that it is wound around the outer turn of the strip 50 and encloses it so as to be integral therewith by friction at rest and as long as the cage is subjected, by pressing against the rear bearing face 13 of the body 1 and thereby becoming integral by inertia with the latter at acceleration of the projectile in the weapon tube, a joint gyration with the body 1 at a speed increasing from the zero value to a maximum value, and in addition such that the external turn of this second spiral band tends to be released under the action of centrifugal force for a value slightly less than or equal to this maximum value to press against the inner peripheral face 6 of the body 1 and to be joined by friction under the conditions described above, so that , successively, this second strip then the strip 50, released by the latter, undergoing the above process come to be pressed against the inner peripheral face 6 of the body 1, by means of the second spiral strip as regards the spiral band 50; the two spiral bands can then be made from different materials such as aluminum for the inner band and brass for the outer band, or even plastics.

Naturellement, plus de deux bandes spirales élastiques peuvent être ainsi juxtaposées soit selon l'axe 2, soit radialement en référence à celui-ci.Naturally, more than two elastic spiral bands can thus be juxtaposed either along the axis 2, or radially with reference to the latter.

Claims (9)

1. Safety device for a rotating missile, possessing, inside the missile body (1) having a specific axis of rotation (2) parallel to a specific direction of translation (3) of the missile, a movable member (30) and at least on locking pin (35, 36) for the latter, this pin being movable, under the action of the centrifugal force redulting from the rotation of the missile, from a position for locking the movable member (30), in which it interacts with the latter, occupying a specific position, to immobilize it in this position, to a position for releasing the movable member (30), in which this interaction ceases, and at least one spiral band (50) which is normally wound up and which is capable of unwinding under the action of the centrifugal force resulting from the rotation of the missile, characterized in that:
- the said member (30) is movable inside a cage (17) mounted so as to be freely rotatable about the axis of rotation (2) relative to the body (1) within the latter, via assembly means (22, 24) allowing a translational play (j) of the cage (17) relative to the body (1) and parallel to the axis of rotation (2), between two bearing faces, a front bearing face (7) and a rear bearing face (13) respectively, of the body (1), with reference to the said direction of translation (3) of the missile,
- the said pin (35, 36) is mounted so as to slide radially in the cage (17), with reference to the axis of rotation (2), between, on the one hand, the said locking position, in which its zone (41, 43) nearest the axis of rotation (2) interacts with the movable member (30) inside the cage (17), to immobilize this member (30) in the said specific position relative to the cage (17), and in which its zone (42, 44) furthest from the axis of rotation (2) is flush with an outer peripheral face (18) of the cage (17), cylindrical in terms of revolution about the axis of rotation (2), and, on the other hand, the said release position which is further from the axis of rotation (2) and in which its zone (41, 43) nearest the latter releases the movable member (30), and
- the said spiral band (50) is interposed between the said outer peripheral face (18) of the cage (17) and an inner peripheral face (6) of the body (1), and in that it is elastic and has a mass, shape, rigidity and prestress which are such that it is wound round the outer peripheral face (18) of the cage (17), and grips it in such a way as to be frictionally connected to it at rest and as long as the latter, becoming integral with the body (1) as result of inertia in response to the acceleration of the missile in the firing tube, experiences a joint rotation with the body (1) at a speed increasing from the zero value to a maximum value, and its outer turn tends to come loose under the action of the centrifugal force at a value slightly below or equal to this maximum value and lays itself against the inner peripheral face (6) of the body (1) and is connected frictionally to it, in such a way that, when the missile emerges from the firing tube, centrifugal unwinding of the elastic spiral band (50) takes place, with the pin (35, 36) being released so as to execute a movement from its position locking the movable member (30) to its position releasing the latter.
2. Device according to Claim 1, with the missile having a specific direction of rotation (4), characterized in that the elastic spiral band (50) is wound in such a way that its respective zones which are nearer and nearer to the axis of rotation (2) succeed one another in this direction (4).
3. Device according to either one of the preceding claims, characterized in that it has a plurality of the said pins (35, 36) which are uniformly distributed angularly with reference to the axis of rotation (2).
4. Device according to any one of the preceding claims, characterized in that the means of assembling the cage (17) relative to the body (1 ) comprise two journals (22, 24) of the cage (17) and two matching axial orifices (9, 15) made in the missile body (1) respectively in the front bearing face (7) and in the rear bearing face (13).
5. Device according to any one of the preceding claims, characterized in that the movable member (30) is a gyroscopic rotor having a proper axis (32) and mounted inside the cage (17) so as to tilt between the said specific position, in which its proper axis (32) is offset angularly relative to the axis of rotation (2), and a second position, in which these axes coincide with one another, the rotor (30) tending to tilt from its first position to its second position during the rotation of the body (1).
6. Device according to claim 5, characterized in that the rotor (30) has an axial channel (33) which, in the second position, forms an integral part of a pyrotechnic chain of the missile.
7. Device according to claim 5, characterized in that it has means of breaking an electrical or fluidic circuit which are controlled by the tilting of the rotor (30).
8. Device according to any one of the preceding claims, characterized in that it has at least one second elastic spiral band placed next to the said first elastic spiral band (50) round the outer peripheral face (18) of the cage (17) in the direction of the axis of rotation (2), this second elastic band having a mass, shape, rigidity and prestress which are such that it is wound round the outer peripheral face (18) of the cage (17) and grips it in such a way as to be frictionally connected to it at rest and as long as the latter, becoming integral with the body (1) as result of inertia in response to the acceleration of the missile in the firing tube, experiences a joint rotation with the body (1) at a speed increasing from the zero value to a maximum value, and its outer turn tends to come loose under the action of the centrifugal force at a value slightly below or equal to this maximum value and lays itself against the inner peripheral face (6) of the body and is connected frictionally to it, in such a way that, when the missile emerges from the firing tube, centrifugal unwinding of the second elastic spiral band takes place.
9. Device according to any one of claims 1 to 7, characterized in that it possesses at least one second elastic spiral band superimposed radially on the said first elastic spiral band (50), with reference to the axis of rotation (2), and having a mass, shape, rigidity and prestress which are such that it is wound round the outer turn of the first spiral band (50) and grips it in such a way as to be frictionally connected to it at rest and as long as the cage (17), becoming integral with the body (1) as result of inertia in response to the acceleration of the missile in the firing tube, experiences a joint rotation with the body (1) at a speed increasing from the zero value to a maximum value, and its outer turn tends to come loose under the action of the centrifugal force at a value slightly below or equal to its maximum value and lays itself against the inner peripheral face (6) of the body (1) and is connected frictionally to it, in such a way that, when the missile emerges from the firing tube, centrifugal unwinding of the second elastic spiral band takes place, thus releasing the first elastic spiral band (50) which then likewise undergoes such centrifugal unwinding.
EP83401862A 1982-09-24 1983-09-23 Safety device with a rotatable housing for a spinning projectile Expired EP0105001B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401862T ATE21765T1 (en) 1982-09-24 1983-09-23 SAFETY DEVICE WITH A SURROUNDING CAGE FOR A SPRING BULLET.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8216097 1982-09-24
FR8216097A FR2533686B1 (en) 1982-09-24 1982-09-24 SECURITY DEVICE WITH A ROTATING CAGE FOR A GIRATORY PROJECTILE

Publications (2)

Publication Number Publication Date
EP0105001A1 EP0105001A1 (en) 1984-04-04
EP0105001B1 true EP0105001B1 (en) 1986-08-27

Family

ID=9277704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401862A Expired EP0105001B1 (en) 1982-09-24 1983-09-23 Safety device with a rotatable housing for a spinning projectile

Country Status (8)

Country Link
US (1) US4510869A (en)
EP (1) EP0105001B1 (en)
AT (1) ATE21765T1 (en)
CA (1) CA1206038A (en)
DE (1) DE3365684D1 (en)
ES (1) ES8405512A1 (en)
FR (1) FR2533686B1 (en)
NO (1) NO159219C (en)

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GB2189309B (en) * 1985-04-04 1989-12-28 British Aerospace Control mechanism for projectiles.
US4815380A (en) * 1987-02-21 1989-03-28 M.A.N. Roland Druckmaschinen Ag Printing machine cylinder with adjustable groove cover element
DE3739368A1 (en) * 1987-11-20 1989-06-01 Dynamit Nobel Ag PRE-TUBE SECURITY ON A FLOOR WITH AN IMPELLER
US5243912A (en) * 1991-12-09 1993-09-14 General Electric Co. Arming delay, dual environment safe, fuze
FR2689972B1 (en) * 1992-04-14 1995-08-11 Manurhin Defense SECURITY AND ARMING DEVICE FOR A PROJECTILE ROCKET COMPRISING AN ANTI-VIBRATORY MEANS.
US7284467B2 (en) * 2000-08-14 2007-10-23 Sd3, Llc Apparatus and method for detecting dangerous conditions in power equipment
US8151708B2 (en) 2008-02-08 2012-04-10 Pacific Scientific Energetic Materials Company Safe and arm mechanisms and methods for explosive devices
FR2959303B1 (en) 2010-04-27 2012-04-06 Nexter Munitions ELECTRICALLY INITIATED STARTING DEVICE FOR PROJECTILE
FR2959304B1 (en) 2010-04-27 2014-10-17 Nexter Munitions INFLATION-BASED INITIATION STARTING DEVICE FOR PROJECTILE
FR2965044B1 (en) 2010-09-22 2012-08-24 Nexter Munitions SAFETY AND ARMING DEVICE FOR GYROSTABILIZED EXPLOSIVE PROJECTILE AND STARTING DEVICE USING SUCH A SAFETY AND ARMING DEVICE
FR3039267B1 (en) 2015-07-24 2017-07-14 Nexter Munitions SAFETY AND ARMING DEVICE FOR AN OGIVE ROCKET AND ROCKER COMPRISING SUCH A DEVICE
FR3040482B1 (en) 2015-08-27 2018-02-16 Nexter Munitions OGIVE ROCKER WITH PERCUTOR
DE102022106883A1 (en) 2022-03-23 2023-09-28 Rheinmetall Air Defence Ag Fuse unit for a detonator, use of the fuse unit and method for activating a detonator with this fuse unit

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US3136253A (en) * 1963-01-28 1964-06-09 Maxson Electronics Corp Delayed arming mechanism
DE1259740B (en) * 1965-02-26 1968-01-25 Rheinmetall Gmbh Impact fuse for twist projectiles
LU53848A1 (en) * 1967-06-09 1969-04-22
CH582872A5 (en) * 1974-09-02 1976-12-15 Oerlikon Buehrle Ag
CH585891A5 (en) * 1974-11-20 1977-03-15 Oerlikon Buehrle Ag
DE2539750C3 (en) * 1975-09-06 1980-06-19 Diehl Gmbh & Co, 8500 Nuernberg Safety device for a swirl fuse
US4242963A (en) * 1978-09-25 1981-01-06 General Electric Company Delayed arming fuze for a spinning projectile

Also Published As

Publication number Publication date
EP0105001A1 (en) 1984-04-04
ES525878A0 (en) 1984-06-01
FR2533686B1 (en) 1987-01-02
NO159219C (en) 1988-12-07
ATE21765T1 (en) 1986-09-15
NO833431L (en) 1984-03-26
FR2533686A1 (en) 1984-03-30
ES8405512A1 (en) 1984-06-01
US4510869A (en) 1985-04-16
NO159219B (en) 1988-08-29
DE3365684D1 (en) 1986-10-02
CA1206038A (en) 1986-06-17

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