EP0756151A1 - Vorrichtung zum Zünden einer Treibladung für eine aus einem Trägergeschoss geworfene Submunition - Google Patents

Vorrichtung zum Zünden einer Treibladung für eine aus einem Trägergeschoss geworfene Submunition Download PDF

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Publication number
EP0756151A1
EP0756151A1 EP96401344A EP96401344A EP0756151A1 EP 0756151 A1 EP0756151 A1 EP 0756151A1 EP 96401344 A EP96401344 A EP 96401344A EP 96401344 A EP96401344 A EP 96401344A EP 0756151 A1 EP0756151 A1 EP 0756151A1
Authority
EP
European Patent Office
Prior art keywords
cam
submunition
primer
safety position
locking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96401344A
Other languages
English (en)
French (fr)
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EP0756151B1 (de
Inventor
Patrice Chemiere
Jean-Paul Dupuy
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.)
Giat Industries SA
Original Assignee
Giat Industries SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP0756151A1 publication Critical patent/EP0756151A1/de
Application granted granted Critical
Publication of EP0756151B1 publication Critical patent/EP0756151B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/14—Double fuzes; Multiple fuzes
    • F42C9/142—Double fuzes; Multiple fuzes combined time and percussion fuzes in which the timing is caused by combustion
    • 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

Definitions

  • the present invention relates to a system for initiating the explosive charge of a submunition on board a carrier vehicle, this system comprising a main striker movable in translation, a movable primer holder driven by a motor member from a position of safety in which the primer is not aligned with the striker and the explosive charge, in an arming position in which this alignment is carried out, at least two means for locking the primer holder in a safety position before the ejection of the submunition, and a device for self-destruction of the submunition after a predetermined delay.
  • a priming system of the aforementioned type is known in particular from document FR-A-2 650 662.
  • the priming systems for submunitions or bombs dispersed by a carrier vehicle must meet safety conditions at the level of the locking means which hold the primer holder in its safety position in order to avoid an accidental ignition of the explosive charge during the loading and handling phases of the carrier which precedes the firing, and be equipped with a self-destruction device to avoid pollution of the ground as a result of a malfunction in the priming system for submunitions.
  • the locking means which must be at least two in number according to NATO standards, are generally of the centrifugal type, that is to say that the driving member which makes it possible to release the locks is constituted by the centrifugal forces which result of the rotational movement imparted to the submunitions at the time of their dispersal, this rotational movement itself resulting from the rotational movement imparted to the carrier during firing.
  • submunitions are loaded onto a carrier vehicle such as a cargo shell or an artillery rocket.
  • the centrifugal forces are generally sufficient to ensure in good conditions the release of the means for locking the primer holder and allow the latter to pass into its arming position.
  • submunitions dispersed from a cargo shell have a flight time of around 15s, so that all the self-destruction devices mentioned above can be used.
  • the object of the invention is to design a priming system for submunitions or bombs which is simple, easy to implement and able to exhibit an excellent level of security and good operating reliability in terms of locking the primer holder and the self-destruction device, a submunition equipped with such a priming system being able to be fired as well by a shell as by an artillery rocket.
  • the invention provides a locking system which is characterized in that one of the means for locking the primer holder consists of a movable cam driven by a motor member from a safety position in which it forms a stop preventing the free passage of the primer holder towards its arming position, in a retracted position allowing the free passage of the primer holder, in that it comprises means for locking the cam in a safety position which are released following the ejection of the submunition, and in that the cam carries an auxiliary striker to initiate a delay cord when the cam passes into its retracted or percussion position after the ejection of the submunition.
  • the cam in its safety position, comprises a stop which is located on the path of movement of a finger secured to the primer holder to immobilize the latter in an intermediate safety position.
  • the means for locking the cam in its safety position comprise a finger secured to the primer holder and which bears on another stop of the cam when the primer holder is itself in its safety position, this finger retracting at the start of the movement for moving the primer holder towards its arming position.
  • the means for locking the cam in its safety position also include the body of a neighboring submunition on board the carrier.
  • the other means for locking the primer holder in its safety position is constituted by the main striker.
  • the drive members which allow the primer holder to pass into its cocking position, and to the cam to pass into its retracted or percussion position are constituted by springs, these displacements can be supplemented by the action of centrifugal forces to which submunitions are subjected.
  • the submunition comprises a body containing the explosive charge, this body being surmounted by the initiating device which comprises a body in which are housed the striker, the primer holder and the cam, and according to another characteristic of the invention, the delay cord of the self-destruction device is wrapped around the body of the priming system.
  • a submunition, equipped with a priming system according to the invention can be indifferently embarked in a cargo shell or an artillery rocket, since the means for locking the primer holder and the cam are not not released by centrifugal forces, and that the self-destruct device includes a cord, the length of which can be adapted during design to obtain delays compatible with the flight times of the submunitions, which are greater in the case of dispersion from an artillery rocket.
  • the primer holder of the priming system can be constituted by a part that can move in rotation or in translation.
  • a submunition 1 intended to be loaded on a carrier vehicle contains an explosive charge 3 which, after ejection or dispersion of the submunition 1, is ignited by a system ignition 5 as a result of the impact of submunition 1 on the ground or on a target.
  • the submunition 1 comprises a metallic body 7, hollow and of tubular shape. At one end, the body 7 is closed by a bottom wall 9, integral with the body 7, and is surmounted by the priming system 5. Towards this end, the body 7 has a part 11 of reduced outside diameter which delimits a annular shoulder 13 with the rest of the body 7.
  • the explosive charge 3 is hollow, that is to say it defines towards the other open end of the body 7 of the submunition 1, an internal space E of frustoconical shape which is covered with a coating 15 of complementary shape and terminated by a circular skirt 15a made integral with the body 7.
  • the priming system 5 comprises a primer 18 carried by a piece or primer holder 20, and a main striker 22.
  • the primer holder 20 is mounted movable in translation (drawer) or in rotation (rotor or barrel) in the body 24 of the priming system 5, so as to pass from a safety position in which the primer 18 is not aligned with the main striker 22 and the explosive charge 3, to an arming position in which this alignment is realised.
  • the body 24 of the priming system 5 is attached to the bottom wall 9 of the body 7 of the submunition 1 with the interposition of a disc 26.
  • the body 24 is capped by a metal mask 28 which is extended by a skirt circular 30 by means of which it is fixed by crimping on the periphery of the reduced diameter part 11 of the body 7 of the submunition 1.
  • the body 24 of the priming system comprises a first central part 24a which is partially surrounded by a second peripheral part 24b, substantially in contact with the mask 28, so as to delimit a free internal space E1 between the body 24 and the mask 28.
  • the primer holder 20 is movable in rotation and will be referred to hereinafter as barrel 20.
  • the barrel 20 is mounted in a housing of the central part 24a of the body 24, so as to be free to rotate about an axis XX perpendicular to the axis YY of the submunition 1.
  • the barrel 20 cooperates with a spring cocking 33 which constitutes the driving member for passing the barrel 20 into its cocking position.
  • the barrel 20 comprises a housing which contains the primer 18, this housing opening out the exterior by two diametrically opposite openings 35.
  • the main striker 22 comprises a cylindrical body 40 terminated towards one end by a percussion point 42.
  • the body 40 is screwed into a nut 44 mounted in the peripheral part 24b of the body 24, so as to be aligned along the axis YY of the submunition and opposite the barrel 20.
  • the barrel 20 armed with its spring 33 is held in its safety position by two locking means.
  • a first locking means is constituted by the main striker 22. More precisely, during assembly operations, the striker 22 is screwed into the nut 44 so as to come to engage with its tip percussion 42 in a notch 46 provided on the periphery of the barrel 20 to immobilize the latter in its safety position.
  • the second means for locking the barrel 20 in its safety position is constituted by a cam 50.
  • the cam 50 is generally circular in shape with a front part 52 and a rear part 54.
  • the profile of the outer edge 55 of the front part 52 is circular with a radius of curvature substantially equal to that of the mask 28, while the profile of the outer edge 56 of the rear part is also circular in shape, but with a radius of curvature slightly more large and substantially equal to that of the skirt 15a of the hollow charge coating 15.
  • the profile of the inner edge 57 between the front 52 and rear 54 parts comprises two notches which respectively delimit two stops 58 and 59.
  • the end face of the front part 52 comprises an auxiliary striker 60 in the form of a point.
  • the cam 50 is mounted inside the internal space E1 delimited between the body 24 of the priming system 5 and the mask 28.
  • the cam 50 is mounted to rotate about an axis fixed 51 parallel to the YY axis.
  • the cam 50 is movable from a safety position to a retracted position under the action of a motor member constituted by an arming spring 62.
  • the cam 50 is immobilized in its safety position by two locking means.
  • the first means for locking the cam 50 is constituted by a finger 65 integral with the barrel 20. This finger 65 bears on the stop 58 of the cam 50 when the barrel 20 is in its safety position.
  • the second cam blocking means 50 is constituted by a stop formed by the internal wall of the skirt 15a of the hollow charge coating 15 of the neighboring submunition against which the outer edge 56 of the rear part 54 of the cam 50 comes into contact through the opening 28a of the mask 28, when the first cam blocking means 50 is released before the dispersion of the submunition ( Figures 9 and 10).
  • the priming system 5 is completed by a self-destruction device 70 which is essentially consisting of a delay cord 72 associated with the auxiliary striker 60.
  • the delay cord 72 is wound around the body 24 of the priming system 5, as is clearly visible in FIG. 1, a spiral groove 74 being advantageously provided at the periphery of the body 24 to receive the delay cord at least in part. 72.
  • the cord 72 advantageously comprises, at one end, a percussion igniter relay 76 responsible for its ignition and, at the other end, a detonation relay 78 responsible for initiating by influence the primer 18 through an opening 79 provided in the barrel 20. Under these conditions, the initiation of the self-destruction device 70 is effected by percussion of the igniter relay 76 by the auxiliary striker 60 carried by the cam 50 when the latter reaches its retracted or percussion position.
  • the parts of the priming system 5 are assembled and fixed to the body 7 of the submunition 1, so that the barrel 20 and the cam 50 are in their respective safety positions, as illustrated in the figures. 1 and 2.
  • the main striker 22 is screwed into the nut 44 so that its percussion point 42 engages in the notch 46 of the barrel 20.
  • the barrel 20 armed by the spring 33 is in its position safety in which the two openings 35 of the barrel 20 which communicates with the primer 18 are not axially aligned with the main striker 22 and the explosive charge 3 along the axis YY of the submunition 1.
  • the cam 50 is held in its safety position by means of the finger 65 of the barrel 20 which bears against the stop 58 of the cam 50. Under these conditions, the outer edge 55 of the front part 52 of the cam 50 is substantially in contact with the mask 28; and the outer edge 56 of the rear part 54 of the cam 50 does not protrude outside the opening 28a of the mask 28.
  • the safety positions of the barrel 20 and of the cam 50 are such that any accident can be avoided during the handling of the submunitions, in particular during the loading phase in the carrier vehicle. Indeed, any manipulation of the submunition is not likely to cause the unscrewing of the main striker 22 and as soon as the barrel 20 is maintained in its safety position, it also ensures the maintenance of the cam 50 in its safety position to avoid accidental initiation of the self-destruction device by the auxiliary striker 60.
  • the barrel 20 and the cam 50 are maintained in their respective safety positions, because the acceleration and the rotation of the carrier have in principle no influence on barrel 20 and cam 50.
  • the submunitions 1 are dispersed, and the barrel 20 of the priming system 5 of a submunition 1 can only pass into its arming position after the action of a stabilizing element trajectory, such as a ribbon or parachute (not shown) and which is fixed to the end of the main striker 22.
  • a stabilizing element trajectory such as a ribbon or parachute (not shown) and which is fixed to the end of the main striker 22.
  • the deployment of this stabilizing element causes a deceleration which, combined with the rotational movement imparted to the submunition after its dispersion, causes the striker to unscrew main 22.
  • the barrel 20 under the action of its cocking spring 33 passes into its cocking position illustrated in FIG. 4.
  • the resulting deceleration causes the percussion of the primer 18 to be struck by the main striker 22.
  • the primer 18 is initiated by the device self-destruction 70 after a delay defined by the length of the cord 72.
  • the main striker 22 undergoes a translational movement such that it releases the barrel 20, the latter under the action of its arming spring 33 moves to its position of weapons.
  • the finger 65 emerges from the stop 58 of the cam 50, which has the effect of releasing the cam which tends to pass into its retracted position under the action of its spring. arming 62.
  • the cam 50 can only perform a limited rotational movement because its rear part 54 will pass through the opening 28a of the mask 28 to come into contact with the coating 15 of the hollow charge of the next submunition.
  • the cam 50 is maintained in an intermediate safety position such that the rotation of the barrel 20 will be interrupted before the latter reaches its cocking position. Indeed, finger 64 of the barrel 20 will come into contact with the stop 59 of the cam 50, which has the effect of interrupting the rotational movement of the barrel 20 which is thus maintained in an intermediate safety position (see FIGS. 9 and 10).
  • the main striker 22 On impact of the submunition 1 on the ground or on a target, the main striker 22 initiates the primer 18 and, in the event of a malfunction, the self-destruction device 70 acts at the end of the delay determined by the length of the cord 72.
  • the primer holder is movable in rotation.
  • the characteristics of the priming system according to the invention also apply in the case where the primer holder is movable in translation.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Lock And Its Accessories (AREA)
EP96401344A 1995-07-27 1996-06-20 Vorrichtung zum Zünden einer Treibladung für eine aus einem Trägergeschoss geworfene Submunition Expired - Lifetime EP0756151B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9509140 1995-07-27
FR9509140A FR2737293B1 (fr) 1995-07-27 1995-07-27 Systeme d'amorcage de la charge explosive d'une sous-munition embarquee dans un engin porteur

Publications (2)

Publication Number Publication Date
EP0756151A1 true EP0756151A1 (de) 1997-01-29
EP0756151B1 EP0756151B1 (de) 2000-07-12

Family

ID=9481446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96401344A Expired - Lifetime EP0756151B1 (de) 1995-07-27 1996-06-20 Vorrichtung zum Zünden einer Treibladung für eine aus einem Trägergeschoss geworfene Submunition

Country Status (4)

Country Link
US (1) US5670736A (de)
EP (1) EP0756151B1 (de)
DE (1) DE69609255T2 (de)
FR (1) FR2737293B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2816400A1 (fr) * 2000-11-07 2002-05-10 Giat Ind Sa Dispositif d'amorcage de la charge explosive d'une sous-munition

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5932834A (en) * 1997-04-24 1999-08-03 The United States Of America As Represented By The Secretary Of The Army Auto-destruct fuze
US6050195A (en) * 1998-12-03 2000-04-18 The United States Of America As Represented By The Secretary Of The Army Self neutralizing fuze
FR2801099B1 (fr) 1999-11-17 2002-10-11 Giat Ind Sa Systeme d'amorcage de la charge explosive d'une sous- munition
GB0301690D0 (en) * 2003-01-24 2003-02-26 Olympic Technologies Ltd Safety system
BE1016094A3 (fr) * 2004-05-14 2006-03-07 Zeebrugge Forges Sa Dispositif d'autodestruction pour fusee de sous-munition.
SG144000A1 (en) * 2006-12-28 2008-07-29 Advanced Material Engineering Self destructing impact fuze

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224749A1 (de) * 1982-07-02 1984-01-05 Gebrüder Junghans GmbH, 7230 Schramberg Zuender mit einem sicherungsrotor
EP0205956A1 (de) * 1985-06-28 1986-12-30 FRATELLI BORLETTI S.p.A. Selbstzerlegungszünder für aus einer Rakete ausgestossene Submunition
EP0284923A2 (de) * 1987-03-31 1988-10-05 TAAS Israel Industries, Limited Sicherung für eine Submunition
FR2650662A1 (fr) * 1989-08-01 1991-02-08 France Etat Armement Dispositif d'amorcage de chaine pyrotechnique pour sous-munition d'obus cargo

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US3985079A (en) * 1975-10-20 1976-10-12 The United States Of America As Represented By The Secretary Of The Army Self-destruct fuze for spinning artillery projectile
US4407201A (en) * 1981-05-04 1983-10-04 Honeywell Inc. Retard sensor and energy converter
DE8236369U1 (de) * 1982-12-24 1984-03-01 Diehl GmbH & Co, 8500 Nürnberg Selbstzerlegungsvorrichtung an drallgeschosszuendern
DE3811931A1 (de) * 1987-10-30 1989-10-19 Amazonen Werke Dreyer H Streugeraet, insbesondere schleuderduengerstreuer
DE3740967A1 (de) * 1987-12-03 1989-06-15 Diehl Gmbh & Co Pyrotechnischer zuender fuer geschosse
DE3912671A1 (de) * 1989-04-18 1990-10-25 Diehl Gmbh & Co Zuender eines bomblets
DE3925238A1 (de) * 1989-07-29 1991-01-31 Rheinmetall Gmbh Zuender fuer ein bombletgeschoss
DE3925235A1 (de) * 1989-07-29 1991-01-31 Rheinmetall Gmbh Bombletzuender
US5016532A (en) * 1989-11-03 1991-05-21 Motorola, Inc. Safe and arm device
EP0573328B1 (de) * 1992-06-02 1997-10-29 GIAT Industries Selbstzerlegungssystem für Submunition mittels chemischer Ätzung
DE4335022C2 (de) * 1993-10-14 1998-06-10 Rheinmetall Ind Ag Zünd- und Sicherungseinrichtung mit Selbstzerlegungseinrichtung für ein mit einer Hohlladungseinlage versehenes Granatengeschoß
US5387257A (en) * 1994-01-05 1995-02-07 The United States Of America As Represented By The Secretary Of The Army Self-destruct fuze for improved conventional munitions

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224749A1 (de) * 1982-07-02 1984-01-05 Gebrüder Junghans GmbH, 7230 Schramberg Zuender mit einem sicherungsrotor
EP0205956A1 (de) * 1985-06-28 1986-12-30 FRATELLI BORLETTI S.p.A. Selbstzerlegungszünder für aus einer Rakete ausgestossene Submunition
EP0284923A2 (de) * 1987-03-31 1988-10-05 TAAS Israel Industries, Limited Sicherung für eine Submunition
FR2650662A1 (fr) * 1989-08-01 1991-02-08 France Etat Armement Dispositif d'amorcage de chaine pyrotechnique pour sous-munition d'obus cargo

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2816400A1 (fr) * 2000-11-07 2002-05-10 Giat Ind Sa Dispositif d'amorcage de la charge explosive d'une sous-munition
WO2002039049A1 (fr) * 2000-11-07 2002-05-16 Giat Industries Dispositif d'amorcage de la charge explosive d'une sous-munition
US6848367B2 (en) 2000-11-07 2005-02-01 Giat Industries Priming device for the explosive charge of a sub-munition

Also Published As

Publication number Publication date
US5670736A (en) 1997-09-23
FR2737293A1 (fr) 1997-01-31
DE69609255T2 (de) 2001-01-04
FR2737293B1 (fr) 1997-10-17
DE69609255D1 (de) 2000-08-17
EP0756151B1 (de) 2000-07-12

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