EP0411996A1 - Zündvorrichtung einer Zündkette für Submunitionskörpern - Google Patents

Zündvorrichtung einer Zündkette für Submunitionskörpern Download PDF

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Publication number
EP0411996A1
EP0411996A1 EP90402167A EP90402167A EP0411996A1 EP 0411996 A1 EP0411996 A1 EP 0411996A1 EP 90402167 A EP90402167 A EP 90402167A EP 90402167 A EP90402167 A EP 90402167A EP 0411996 A1 EP0411996 A1 EP 0411996A1
Authority
EP
European Patent Office
Prior art keywords
drawer
striker
primer
submunition
priming
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
EP90402167A
Other languages
English (en)
French (fr)
Other versions
EP0411996B1 (de
Inventor
Patrice Chemiere
Jean-Paul Dupuy
Alain Pascal
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
Direction General pour lArmement DGA
Giat Industries SA
Etat Francais
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 Direction General pour lArmement DGA, Giat Industries SA, Etat Francais filed Critical Direction General pour lArmement DGA
Publication of EP0411996A1 publication Critical patent/EP0411996A1/de
Application granted granted Critical
Publication of EP0411996B1 publication Critical patent/EP0411996B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F42C15/44—Arrangements for disarming, or for rendering harmless, fuzes after arming, e.g. after launch

Definitions

  • the field of the present invention is that of priming devices for submunitions of cargo shells, in particular for anti-personnel and anti-vehicle grenades dropped in large numbers above a target, according to the so-called technique. of "saturation".
  • a cargo shell is a shell whose usual explosive charge has been replaced by a large number of submunitions or sub-projectiles.
  • the constraints to be respected for the solution of the technical problem defined above are the following: -There is a constraint of form and dimensions. This constraint comes from the need to house the priming device in the hollow charge cone of the next submunition as explained above, -There is then a mass constraint, the priming device located at the rear of the submunition must be as light as possible so that the center of gravity of the submunition is located as forward as possible , which promotes stability on the trajectory, -There is finally a constraint linked to the firing conditions of the cargo shell, essentially by the need to resist the very strong acceleration received by this shell during its interior ballistics phase.
  • the closest embodiment of the invention consists of the third version of the initiation device described in patent US4612858.
  • this priming device comprises a primer placed in a sliding drawer, which a striker strikes at the moment of impact, moved by its own inertia.
  • the safety of firing is supplemented by self-destruction, the firing of which is caused by the rotation of the sub-projectile.
  • the self-destruction system comprises a primer integral with the drawer and coming under the effect of centrifugal force to strike a striker integral with the body of the priming device.
  • This primer in turn initiates a retarding composition placed in a groove formed on a face of a disc interposed between the initiation system and the main charge, and having in the axis of the striker a priming relay which can be initiated, either by the main primer or by the retarding composition.
  • This device has many drawbacks. It can firstly be observed that all of the operating safety features are lifted under the action of centrifugal force alone, which is penalizing from the safety point of view.
  • this priming device is composed of a large number of parts, which makes it an expensive assembly.
  • the body is a complex foundry piece generally made from a zinc alloy and it ensures both the housing of the different parts as well as the fixing and the maintenance of the priming device on the body of the sub- ammunition.
  • This construction has the advantage of locking the drawer in a known position and preventing the priming of the main chain on the one hand and of a possible delay chain on the other hand.
  • the neutralization device requires a movement of the drawer bringing the latter into a neutralization position, movement which cannot take place if the drawer is blocked.
  • the device proposed by the invention by interposing a mechanical obstacle on the path of the drawer ensures such neutralization whatever the state of the springs actuating the drawer.
  • the neutralization means comprise a trigger pivotally mounted relative to the body and held by a spring, constituting the motor means, in a position such that one of its ends constituting the obstacle prevents any passage from the drawer to its armed position, the trigger being fixed capable of tilting against the action of the spring under the effect of an axial rotational movement of the submunition, its end then no longer prohibiting the movements of the drawer.
  • the first locking means of the drawer comprises three elements aligned along a fictitious axis YY ′ parallel to the longitudinal axis XX ′ of the submunition, these elements being a counterweight bearing in a housing of the body to block the drawer, a spring guided on one side on a weak distance by a pin fixed to the body and adjusted on the other side in a bore of the counterweight, and a recess arranged in the body all around the axis YY ′.
  • the mask 44 thus covers the body 7 which supports all of the priming means, the body being kept in contact with the mask by a closing disc 13 which itself comes to bear on the explosive charge 4.
  • the attachment of the mask carrying the initiation device to the explosive charge is made by annular crimping 45 onto the metal casing 47 of the charge (see FIG. 7), but any other mode of connection would be possible.
  • the mask constitutes a reinforcement of the body and allows it to be dimensioned allowing the use of plastics. Indeed, the forces transmitted during movements of the submunitions by the parts constituting the priming device according to the invention will be absorbed by the mask, the rigidity of which is sufficient. This avoids having to use a complex profile foundry to produce the initiation device.
  • a transverse groove 48 Inside the body 7 is arranged a transverse groove 48 inside which is slidably mounted a drawer 8, carrying a primer 9.
  • the drawer is pushed into its groove by a compression spring 10 bearing on one side on one end 11 of a recess in the drawer and on the other on a lug 12 of the closing disc 13 of the body 7.
  • the body also has a longitudinal bore 49 inside which a striker 16 is slidably mounted.
  • a textile tape 31 is linked to the telescopic rod 32 by means of a washer 33 held by a crimping 34.
  • the striker also carries a flange 15 which is received when the device is in the safety position in a groove 14 of the drawer 8, which thus immobilizes the striker in translation.
  • Figures 3 and 4 show a first blocking means constituted by a counterweight 18, bearing in a housing 29 of the body 7 and on an imprint 46 made on the drawer so as to block the latter (fig 3).
  • the counterweight is held in position by a compression spring 19, adjusted on one side in a blind bore of the counterweight 18 and guided on the other side over a short length by a pin 20 secured to the body 7.
  • this lock is designed so as to operate only during sufficient accelerations and strokes of the counterweight (acceleration of the order of 900 g), this in order to protect against accidental unlockings consecutive to rough handling or falls during storage or handling periods.
  • the counterweight 18, the spring 19 and the pin 20 are aligned along an axis YY ′ parallel to the longitudinal axis XX ′ of the submunition and to the acceleration vector of the projectile at the start of the shot.
  • a recess 30 is arranged in the body 7 all around the axis YY '(see Figure 5), the function of this recess will be explained below.
  • the drawer is then still immobilized in a safety position but the flange 15 is released from the groove 14, allowing translation of the striker.
  • the drawer 8 carries a pin 38 ( Figure 3) pushed by a spring 39, intended to engage in a hole 40 of the body 7 so as to lock the drawer in the armed position.
  • FIGS. 3, 5 and 6 there is a representation of a self-destruction device comprising a striker 24 integral with the drawer 8, and a retarder assembly consisting of a primer 21 and a priming relay 22 , set on a flexible delay cord 23.
  • the priming device also comprises a neutralization means comprising a centrifugal trigger 25 held in the safety position shown in FIG. 3 by a torsion spring 26 and accommodating its free end 51 between the striker 24 and the primer 21 of the delay system, thus creating an obstacle preventing any passage of the drawer into its armed position.
  • the trigger carries at its free end 51 opposite the striker 24 a housing 43 whose function will be explained below.
  • the retarder assembly is fixed to the outside of the body 7 by support pieces 27 and 28 made integral with the body 8 by means of a snap not shown (see Figures 3, 5 and 6).
  • the shell undergoes an acceleration and a rotation.
  • the counterweight 18 then compresses the spring 19 along the axis YY ′ and is found in the recess 30.
  • the rotation of the projectile generating a centrifugal force, the counterweight 18 is offset and wedged across the recess 30.
  • the counterweight 18 cannot, as a result of its offset, return to its place even after the acceleration phase has ended.
  • the centrifugal force causes the separation of the trigger 25, as well as the translation of the drawer 8 pushed by the spring 10, the flange 15 is then released from the groove 14, and the striker free to translate.
  • the ribbon 31 (fig 7) is deployed and pulls the telescopic rod 32 which abuts on the washer 36, then extracts the striker 16 from its housing 17.
  • the drawer then passes into the armed position and at the same time, the striker 24 initiates the self-destruction device, the drawer is locked by the pin 38 engaged in the hole 40.
  • the positioning of the primer 9 is ensured by the lug 12 on which the end 37 of the spring housing 10 comes into abutment.
  • the submunition hits the target on the side of the hollow charge and at the same time undergoes a very strong deceleration.
  • the striker 16 strikes and initiates the primer 9 and consequently the hollow charge 4.
  • the submunition sees its fall braked gradually, for example by branches holding the ribbon 31, the initiation of the charge is nevertheless ensured by the self-destruction device.
  • the self-destruction sequence begins at the time of the passage of the priming device in the armed position and continues thereafter, whatever the environmental conditions encountered by the submunition during its fall, which constitutes a guarantee of reliability.
  • this self-destruction can only initiate the main charge if the drawer 8 is in the armed position, the recess 41 then being opposite the recess 42.
  • the shape of the housing 43 is complementary to that of the striker 24 so as to produce, in the event of displacement of the drawer bringing this striker inside the housing 43, an irreversible jamming of these elements, which increases the safety of the device during subsequent manipulations.
  • FIGS. 8 to 12 show a second embodiment of the ignition device according to the invention, in which elements similar to those described above have the same reference numerals.
  • the body 7 is a foundry of a zinc alloy (Zamac) produced for example by the lost wax process.
  • Zamac zinc alloy
  • a drawer 8 disposed in a transverse groove 48 of the body 7, and held by a closing disc 13 made integral with the body 7 by a not shown fixing means (screws or rivets).
  • the drawer is pushed by the spring 10 which bears on one side on a lug 12 of the disc 13.
  • the striker 16 is slidably mounted in the longitudinal bore 49, in this variant it does not have a telescopic rod, but carries the textile tape 31 fixed by means of a washer 33 held by a crimping 34.
  • the flange 15 of the striker 16 is housed in the groove 14 of the drawer 8 which thus immobilizes the striker in translation.
  • the rotating braking fins 56 are folded over the hoop 55 and welded thereto by one of their ends.
  • the locking of the drawer in the armed position is ensured by a plunger 57 slidably mounted in a housing 58 of the body 7 and pushed by a spring.
  • This plunger is held by a cover 59 made of plastic material which is supported on a flat face of the body 7 and made integral with the latter by rivets (not shown).
  • the cover 59 also carries the pin 20 which guides the spring 19 of the counterweight 18 (see FIG. 9), this counterweight constitutes the first means of blocking the drawer 8 as has already been described for the first embodiment.
  • Figures 10, 11 and 12 show the self-destruction device which comprises as before a striker 24 secured to the drawer 8, and a retarder assembly consisting of a primer 21, a priming relay 22 and a flexible delay cord 23 (see Figures 11 and 12).
  • the primer is an percussion sensitive igniter which is not attached to the delay cord but which is fixed on the body 7 opposite the striker 24.
  • a chimney 60 arranged in the body 7, connects the igniter to the delay cord 23.
  • Such an arrangement makes it possible to use a cord of reduced length and having only a single curvature, which facilitates its positioning on the body 7 by simple adjustment inside the parallel transverse bores 61 and 62, and guarantees reliability. of transmission.
  • the flames produced by the initiation of the igniter will be guided by the chimney 60 and will initiate the delay cord 23 by means of an ignition composition 63 sensitive to heat or to the flame (for example a known mixture of Zirconium and Barium chromate).
  • an ignition composition 63 sensitive to heat or to the flame for example a known mixture of Zirconium and Barium chromate.
  • the priming relay 22 will initiate the primer 9 through the recesses 41 (on the drawer 8) and 42 (on the body 7), and this only if the drawer 8 is in the armed position (FIG. 11).
  • the neutralization means ( Figure 10) is as previously constituted by the centrifugal trigger 25 held in the safety position by the torsion spring 26, in this particular embodiment the trigger has at its end a housing, but it does not have a shape complementary to that of the striker 24 and does not make it possible to wedge the latter.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Emergency Lowering Means (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP90402167A 1989-08-01 1990-07-27 Zündvorrichtung einer Zündkette für Submunitionskörpern Expired - Lifetime EP0411996B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8910338A FR2650662B1 (fr) 1989-08-01 1989-08-01 Dispositif d'amorcage de chaine pyrotechnique pour sous-munition d'obus cargo
FR8910338 1989-08-01

Publications (2)

Publication Number Publication Date
EP0411996A1 true EP0411996A1 (de) 1991-02-06
EP0411996B1 EP0411996B1 (de) 1994-12-14

Family

ID=9384345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402167A Expired - Lifetime EP0411996B1 (de) 1989-08-01 1990-07-27 Zündvorrichtung einer Zündkette für Submunitionskörpern

Country Status (6)

Country Link
US (2) US5206457A (de)
EP (1) EP0411996B1 (de)
DE (1) DE69015046T2 (de)
ES (1) ES2068356T3 (de)
FR (1) FR2650662B1 (de)
IL (1) IL95243A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672673A1 (fr) * 1991-02-11 1992-08-14 Giat Ind Sa Dispositif d'amorcage pour un sous-projectile.
FR2701109A1 (fr) * 1993-02-04 1994-08-05 Rheinmetall Gmbh Dispositif d'allumage pour projectiles, missiles, bombes miniatures et mines avec un dispositif autodestructeur pyrotechnique.
US5585592A (en) * 1994-05-31 1996-12-17 Motorola, Inc. Shock tolerant fuze
EP1048923A1 (de) * 1999-04-27 2000-11-02 Junghans Feinwerktechnik GmbH & Co.KG Pyrotechnischer Selbszerleger für Munition
US7387156B2 (en) 2005-11-14 2008-06-17 Halliburton Energy Services, Inc. Perforating safety system
FR3049056A1 (fr) * 2016-03-17 2017-09-22 Nexter Munitions Dispositif d'amorcage pour une charge pyrotechnique et munition incorporant un tel dispositif d'amorcage

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2683035B1 (fr) * 1991-10-25 1993-12-24 Giat Industries Fusee pour bombelette munie d'un ruban stabilisateur.
EP0573328B1 (de) * 1992-06-02 1997-10-29 GIAT Industries Selbstzerlegungssystem für Submunition mittels chemischer Ätzung
FR2697079B1 (fr) * 1992-10-16 1994-12-30 Giat Ind Sa Ruban stabilisateur pour sous-munition.
FR2699660B1 (fr) * 1992-12-18 1995-02-24 Giat Ind Sa Système d'amorçage et d'auto-destruction d'une munition, en particulier d'une sous-munition destinée à être éjectée d'un obus cargo avec un mouvement de rotation propre autour d'un axe.
DE4335022C2 (de) * 1993-10-14 1998-06-10 Rheinmetall Ind Ag Zünd- und Sicherungseinrichtung mit Selbstzerlegungseinrichtung für ein mit einer Hohlladungseinlage versehenes Granatengeschoß
FR2737293B1 (fr) * 1995-07-27 1997-10-17 Giat Ind Sa Systeme d'amorcage de la charge explosive d'une sous-munition embarquee dans un engin porteur
US5932834A (en) * 1997-04-24 1999-08-03 The United States Of America As Represented By The Secretary Of The Army Auto-destruct fuze
DE19917121C2 (de) 1999-04-15 2002-03-21 Rheinmetall W & M Gmbh Submunitionsgeschoss mit einem durch die Anströmkräfte der Luft aus der Sicherungsposition freigebbaren Schieber
DE19916775C2 (de) 1999-04-15 2002-12-05 Rheinmetall W & M Gmbh Submunitionsgeschoß
US6412417B1 (en) * 1999-07-22 2002-07-02 Alliant Techsystems Inc. Igniter assembly actuated by parachute deployment, and flare containing the same
FR2816400B1 (fr) 2000-11-07 2003-04-04 Giat Ind Sa Dispositif d'amorcage de la charge explosive d'une sous-munition
IL155219A (en) * 2003-04-03 2010-11-30 Israel Military Ind Thunder of secondary ammunition
US6968785B2 (en) * 2003-09-22 2005-11-29 The United States Of America As Represented By The Secretary Of The Army Locking and stabilizing device for grenades
BE1016094A3 (fr) 2004-05-14 2006-03-07 Zeebrugge Forges Sa Dispositif d'autodestruction pour fusee de sous-munition.
FR2892810B1 (fr) 2005-10-27 2010-05-14 Giat Ind Sa Dispositif de securite pyrotechnique a ecran micro usine
FR2892809B1 (fr) 2005-10-27 2010-07-30 Giat Ind Sa Dispositif de securite pyrotechnique a dimensions reduites
US20080072781A1 (en) * 2006-09-25 2008-03-27 Chang Industry, Inc. System and method for safing and arming a bore-launched projectile
DE102008017725A1 (de) 2008-04-07 2009-10-08 Rheinmetall Waffe Munition Gmbh Scheinziel mit einfacher Sicherheitsvorrichtung
DE102008017722A1 (de) 2008-04-07 2009-10-08 Rheinmetall Waffe Munition Gmbh Wirkmassenbehälter
CN110779402A (zh) * 2019-09-30 2020-02-11 湖北三江航天红林探控有限公司 一种基于电磁铁的滑块式隔爆机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786759A (en) * 1972-11-27 1974-01-22 Us Army Self-destruct fuze
FR2606136A1 (fr) * 1986-10-30 1988-05-06 France Etat Armement Dispositif de securite et d'armement pour sous-projectiles dispersables
EP0284923A2 (de) * 1987-03-31 1988-10-05 TAAS Israel Industries, Limited Sicherung für eine Submunition

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DE328749C (de) * 1920-11-03 Franz Stock Fa Aufschlagzuender mit Fliehstueck
US1563418A (en) * 1924-10-09 1925-12-01 Adelman Arthur Fuse
BE537367A (de) * 1954-04-27
US3780660A (en) * 1971-02-23 1973-12-25 Us Air Force Multiple function safe and arm mechanism
US3848531A (en) * 1973-10-30 1974-11-19 Us Army Self-destruct fuze
DE3144996C2 (de) * 1981-11-12 1986-08-07 Inventa AG für Forschung und Patentverwertung Zürich, 8006 Zürich Sicherungsvorrichtung für den Rotor eines Zünders
US4488488A (en) * 1982-12-23 1984-12-18 The United States Of America As Represented By The Secretary Of The Army Warhead safety and ribbon chute holder
DE3333312A1 (de) * 1983-09-15 1985-04-04 Rheinmetall GmbH, 4000 Düsseldorf Zuender fuer ein tochtergeschoss
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786759A (en) * 1972-11-27 1974-01-22 Us Army Self-destruct fuze
FR2606136A1 (fr) * 1986-10-30 1988-05-06 France Etat Armement Dispositif de securite et d'armement pour sous-projectiles dispersables
EP0284923A2 (de) * 1987-03-31 1988-10-05 TAAS Israel Industries, Limited Sicherung für eine Submunition

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672673A1 (fr) * 1991-02-11 1992-08-14 Giat Ind Sa Dispositif d'amorcage pour un sous-projectile.
FR2701109A1 (fr) * 1993-02-04 1994-08-05 Rheinmetall Gmbh Dispositif d'allumage pour projectiles, missiles, bombes miniatures et mines avec un dispositif autodestructeur pyrotechnique.
US5375526A (en) * 1993-02-04 1994-12-27 Rheinmetall Gmbh Fuze mechanism for projectiles, rockets, bomblets and mines having a pyrotechnic self-destruct mechanism
US5585592A (en) * 1994-05-31 1996-12-17 Motorola, Inc. Shock tolerant fuze
EP1048923A1 (de) * 1999-04-27 2000-11-02 Junghans Feinwerktechnik GmbH & Co.KG Pyrotechnischer Selbszerleger für Munition
US7387156B2 (en) 2005-11-14 2008-06-17 Halliburton Energy Services, Inc. Perforating safety system
FR3049056A1 (fr) * 2016-03-17 2017-09-22 Nexter Munitions Dispositif d'amorcage pour une charge pyrotechnique et munition incorporant un tel dispositif d'amorcage

Also Published As

Publication number Publication date
FR2650662B1 (fr) 1991-10-11
DE69015046T2 (de) 1995-04-27
US5206457A (en) 1993-04-27
US5275101A (en) 1994-01-04
FR2650662A1 (fr) 1991-02-08
ES2068356T3 (es) 1995-04-16
IL95243A0 (en) 1991-06-10
DE69015046D1 (de) 1995-01-26
IL95243A (en) 1993-08-18
EP0411996B1 (de) 1994-12-14

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