EP0316894A1 - After-firing safety device for a missile with an impact fuse - Google Patents

After-firing safety device for a missile with an impact fuse Download PDF

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Publication number
EP0316894A1
EP0316894A1 EP88119087A EP88119087A EP0316894A1 EP 0316894 A1 EP0316894 A1 EP 0316894A1 EP 88119087 A EP88119087 A EP 88119087A EP 88119087 A EP88119087 A EP 88119087A EP 0316894 A1 EP0316894 A1 EP 0316894A1
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EP
European Patent Office
Prior art keywords
cage
spring
coil spring
firing
spring assembly
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Granted
Application number
EP88119087A
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German (de)
French (fr)
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EP0316894B1 (en
Inventor
Uwe Dipl.-Ing. Brede
Ernst Jensen
Helmuth Werner
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Dynamit Nobel AG
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Dynamit Nobel AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • 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
    • F42C15/20—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin
    • F42C15/23—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin by unwinding a flexible ribbon or tape

Definitions

  • the invention relates to a front pipe protection on a projectile with impact detonator with a tensioned coil spring surrounded by a cage, through which a space between the firing pin and firing pin is filled to such an extent that touching the firing pin by the firing pin is excluded, the coil spring only after the shot has been fired a displacement of the cage is given the opportunity to relax, thereby freeing up the space mentioned and thereby making it possible for the firing pin to move.
  • DE-OS 35 01 450 describes a front pipe safety device for practice ammunition, in which the lighter is held in such a position by a safety pin that the lighter pin cannot touch the lighter and thus does not initiate the active charge in this state. After the shot, the safety pin is ejected delayed by gas pressure, a pyrotechnic gas generator being necessary for this, which is initiated via a retarding ignition system with a transmission path when the ammunition is shot.
  • This device is relatively complex to manufacture.
  • a central bore is initially closed by a locking disk, thereby preventing a firing pin from touching a firing pin or igniting a pyrotechnic combustion zone.
  • the opening of this central bore is brought about by the fact that, under the influence of the centrifugal force, a tape wrap opens and a rotation of the tensioning disk against the direction of rotation of the projectile leads to a deflection of the locking disk from the area of the central bore.
  • the tape winding is coaxially enclosed in an annular cage, the inner bore of which forms the central bore and the annular space is dimensioned such that it un the locking disc when the tape winding is open part of or complete release of the central bore.
  • the object of the invention is a precise, simple safety device on the impact detonator of projectiles, which acts safely over an adjustable, even longer time range.
  • the task is solved by a down tube protection, in which a coil spring package with several coil springs, which are wound in opposite directions one behind the other, is inserted into the cage.
  • the role of the wound spring assembly is to prevent the ignition needle from approaching the ignition bolt due to its presence in the intermediate space. Additional spacers or a lock washer are not required.
  • the outermost layer of the outer coil spring immediately begins to relax.
  • the relaxation of the spiral spring runs consecutively from the outside in, never distributed over the entire length of the spring at the same time.
  • several spiral springs are to be wound one above the other, with the winding direction changing with each spring. As a result, the rotation of the spring assembly is calmed down and reversed each time a spring changes to another; the sequence of the next counter-rotating spring therefore starts again from zero.
  • the coil springs are to be dimensioned such that after relaxation the inner diameter has become so large that the firing pin can be moved uninhibitedly in the direction of the firing needle.
  • spring length, spring strength, degree of tension, due to the diameter of the cage and the pretreatment of the spring, as well as through the rubbing of the band layers against each other the time can be measured very precisely with simple means, in which ignition may not occur.
  • a particular advantage of this safety device is that the safety is independent of a swirl movement of the projectile. Securing or unlocking takes place in the same way, regardless of whether the projectile rotates about its longitudinal axis or not. However, the device for twistless projectiles is preferred.
  • a known transport safety device can also be implemented in the simplest manner by the cage being fixed in the axial direction by a lateral securing pin.
  • Figure 1 shows a projectile head 1 with the front pipe protection according to the invention.
  • the left half shows the secured position; in the right half the fore-pipe safety device is switched off and the axially movable ignition pin 2 is opened on the ignition needle disk 4 due to its inertia when it strikes the ignition needle 3.
  • the spiral spring assembly 6, which is surrounded by a cage 5 in the form of a circular ring, extends as far as into the space between the firing needle 3 and the front of the firing pin 2 a that even at the highest accelerations due to the rigidity of the spring assembly 6, touching the firing needle 3 on the firing pin 2 is excluded.
  • a locking pin 7 can still be seen, which serves as a transport lock. As long as this pin 7 is not pulled out, the cage 5 cannot move even under the greatest accelerations, and ignition is therefore impossible. The pin 7 is removed before loading.
  • the spring assembly 6 wound from three individual springs 8, 9, 10 can be seen better in FIG. 2.
  • the inner dash-dotted line 11 indicates the inner diameter of the cage 5 and corresponds approximately to the outer diameter of the firing pin 2.
  • the outer dash-dotted line 12 represents the outer diameter of the cage 5 or the inner wall of the projectile head and indicates the maximum available space into which the spring assembly 6 can expand. The space is so large that in the relaxed state of the spring assembly 6 the inner, approximately circular space 13 has become so large that the front part of the firing pin 2 is let through.
  • FIG. 2 shows the state in which the cage 5 has just slipped onto the ignition bolt and the spring assembly 6 begins to relax.
  • the beginning 14 of the spring 8 lies against the wall 12 on the floor and the rest of the spring assembly 6 endeavors to unwind in a rotating manner along the wall 12 of the newly created larger free space.
  • the spring assembly 6 rotates with increasing rotational speed but still closed inner winding core up to the end of the spring band 8.
  • the end of the spring 10 lies very close to the ring-shaped spring assembly, which has an enlarged diameter, and the central opening 13 is so large that the spring 10 can no longer hinder the axial movement of the firing pin 2.
  • the time that passes until the narrow spring assembly 6 is expanded into a larger, again annular spring assembly depends on different sizes and is very easy to adjust.
  • the length, the tensioning force and the friction of the belt layers against each other are important.
  • the relaxation and thus also the rotation of the spring assembly can advantageously be magnetically braked, which results in an increase in the backup time.
  • a safety device with a magnetic brake is shown in Figure 3.
  • the secured state is shown in the left half as in FIG. 1; the right half shows the state of the impact: the firing needle 3 penetrated the firing pin 2 which was moved forward when braking.
  • the parts are identified by the same reference numerals as in FIG. 1.
  • the ignition needle disk 4 is slightly bent upwards here. It receives an annular disc 15 of a permanent magnet. It is magnetized in such a way that the direction of magnetization essentially runs in the ring plane and the two poles on the disk form opposite each other and the field lines run predominantly perpendicular to the coil springs of the spring assembly 6.
  • FIG. 6 A somewhat modified spring assembly 6 is shown in FIG.
  • the beginning 16 of the outermost coil spring 8 is corrugated here. This prevents the outermost turn of the coil spring from being able to slide between the cage and the firing pin when the cage is removed from the coil spring assembly.

Abstract

Eine Vorrohrsicherung an einem Geschoß mit Aufschlagzünder wird von einem Spiralfederpaket (6) gebildet, auf dem mindestens drei Federn (8, 9, 10) hintereinander jeweils gegenläufig aufgewickelt sind, wobei das von einem Käfig (5) gespannt gehaltene Paket (6) sich abzuwickeln beginnt, sobald aufgrund der Beschleunigung beim Abschuß der Käfig (5) über das Spiralfederpaket (6) rutscht. Die Zeit die verstreicht, bis die zentrale Öffnung ganz freigegeben wird, hängt von der Zahl der Federn, der Federlänge, der Federspannkraft und dem Reibungsverhalten ab. Die Vorrohrsicherung ist sowohl für Drallgeschosse als auch für drallose Geschosse gleichermaßen geeignet.A front pipe protection on a projectile with a detonator is formed by a coil spring package (6), on which at least three springs (8, 9, 10) are wound in opposite directions one behind the other, the package (6) held taut by a cage (5) being unwound begins as soon as the cage (5) slips over the coil spring assembly (6) due to the acceleration when firing. The time that elapses before the central opening is fully opened depends on the number of springs, the spring length, the spring tension and the friction behavior. The front pipe protection is equally suitable for swirl bullets as well as for swirl-less bullets.

Description

Die Erfindung richtet sich auf eine Vorrohrsicherung an einem Geschoß mit Aufschlagzünder mit einer von einem Käfig umgebenen gespannten Spiralfeder, durch die ein Raum zwischen Zündbolzen und Zündnadel soweit ausgefüllt wird, daß eine Berührung des Zündbolzens durch die Zündnadel ausgeschlossen ist, die Spiral­feder erst nach Schußabgabe durch eine Verschiebung des Käfigs die Möglichkeit erhält, sich zu entspannen, dabei der erwähnte Raum frei wird und dadurch eine Bewegung des Zündbolzens mög­lich werden kann.The invention relates to a front pipe protection on a projectile with impact detonator with a tensioned coil spring surrounded by a cage, through which a space between the firing pin and firing pin is filled to such an extent that touching the firing pin by the firing pin is excluded, the coil spring only after the shot has been fired a displacement of the cage is given the opportunity to relax, thereby freeing up the space mentioned and thereby making it possible for the firing pin to move.

In der DE-OS 35 01 450 ist eine Vorrohrsicherung für Übungsmu­nition beschrieben, bei der der Anzünder durch einen Siche­rungsstift in einer solchen Lage gehalten wird, daß der Anzünd­stift nicht den Anzünder berühren kann und somit eine Ini­tiierung der Wirkladung in diesem Zustand unterbleibt. Der Si­cherungsstift wird nach dem Abschuß verzögert durch Gasdruck ausgeworfen, wobei dafür ein pyrotechnischer Gasgenerator not­wendig ist, der über ein verzögernd arbeitendes Anzündsystem mit Übertragungsstrecke beim Abschuß der Munition initiiert wird. Diese Einrichtung ist relativ aufwendig in der Fertigung.DE-OS 35 01 450 describes a front pipe safety device for practice ammunition, in which the lighter is held in such a position by a safety pin that the lighter pin cannot touch the lighter and thus does not initiate the active charge in this state. After the shot, the safety pin is ejected delayed by gas pressure, a pyrotechnic gas generator being necessary for this, which is initiated via a retarding ignition system with a transmission path when the ammunition is shot. This device is relatively complex to manufacture.

Bei einer anderen Vorrohr-Sicherheitseinrichtung an einem Auf­schlagzünder für ein Drallgeschoß (DE-OS 27 35 575) ist eine Zentralbohrung durch eine Sperrscheibe zunächst verschlossen, wodurch verhindert wird, daß eine Zündnadel einen Schlagbolzen berühren oder eine pyrotechnische Brennstrecke durchzünden kann. Das Öffnen dieser Zentralbohrung wird dadurch bewirkt, daß unter dem Einfluß der Fliehkraft ein Bandwickel sich öffnet und dabei eine Drehung der Spannscheibe entgegen der Drehrich­tung des Geschosses zu einer Auslenkung der Sperrscheibe aus dem Bereich der Zentralbohrung führt. Der Bandwickel ist ko­axial in einem ringförmigen Käfig eingeschlossen, dessen innere Bohrung die Zentralbohrung bildet und dessen Ringraum so bemes­sen ist, daß er die Sperrscheibe bei geöffnetem Bandwickel un­ ter teilweiser oder völliger Freigabe der Zentralbohrung auf­nimmt.In another downpipe safety device on an impact detonator for a swirl projectile (DE-OS 27 35 575), a central bore is initially closed by a locking disk, thereby preventing a firing pin from touching a firing pin or igniting a pyrotechnic combustion zone. The opening of this central bore is brought about by the fact that, under the influence of the centrifugal force, a tape wrap opens and a rotation of the tensioning disk against the direction of rotation of the projectile leads to a deflection of the locking disk from the area of the central bore. The tape winding is coaxially enclosed in an annular cage, the inner bore of which forms the central bore and the annular space is dimensioned such that it un the locking disc when the tape winding is open part of or complete release of the central bore.

Eine solche Einrichtung führt nicht immer dazu, daß die Zen­tralbohrung hinreichend freigegeben wird; außerdem erfolgt die Entsicherung zu schnell und zu ungenau.Such a device does not always result in the central bore being released sufficiently; in addition, the unlocking takes place too quickly and too imprecisely.

Aufgabe der Erfindung ist eine präzise, über einen einstellba­ren, auch längeren zeitlichen Bereich sicher wirkende, einfache Sicherungseinrichtung am Aufschlagzünder von Geschossen.The object of the invention is a precise, simple safety device on the impact detonator of projectiles, which acts safely over an adjustable, even longer time range.

Die Aufgabe wird von einer Vorrohrsicherung gelöst, bei der ein Spiralfederpaket mit mehreren, hintereinander jeweils gegenläu­fig gewickelten Spiralfedern in den Käfig eingesetzt ist.The task is solved by a down tube protection, in which a coil spring package with several coil springs, which are wound in opposite directions one behind the other, is inserted into the cage.

Das aufgewickelte Federpaket hat die Aufgabe, durch sein Vor­handensein in dem Zwischenraum eine Annäherung der Zündnadel an den Zündbolzen zu verhindern. Zusätzliche Abstandshalter oder eine Sperrscheibe sind nicht erforderlich. Wenn der Käfig beim Abschuß aufgrund seiner Trägheit über das Spiralfederpaket ab­rutscht, beginnt unmittelbar sich die äußerste Lage der äußeren Spiralfeder zu entspannen. Das Entspannen der Spiralfeder läuft konsekutiv von außen nach innen ab, niemals gleichzeitig über die ganze Federlänge verteilt. Erfindungsgemäß sind mehrere Spiralfedern übereinander zu wickeln, wobei sich der Wickelsinn bei jeder Feder ändern soll. Dadurch kommt es jedesmal zu einer Beruhigung und einer Umkehr der Rotation des Federpaketes beim Übergang einer Feder auf eine andere; der Ablauf der nächsten gegenläufigen Feder fängt also jeweils wieder bei Null an. Das hat zur Folge, daß man schon mit drei gegenläufig gewickelten Federn erhebliche Verzögerungszeiten sicher und reproduzierbar erzeugen kann. Die Spiralfedern sind so zu bemessen, daß nach dem Entspannen der Innendurchmesser so groß geworden ist, daß der Zündbolzen ungehemmt in Richtung der Zündnadel verschoben werden kann. Durch die Parameter Federlänge, Federstärke, Spanngrad, bedingt durch den Durchmesser des Käfigs und die Vorbehandlung der Feder, sowie durch das Reiben der Bandlagen gegeneinander kann sehr präzise mit einfachen Mitteln die Zeit, in der es nicht zu einer Zündung kommen darf, eingestellt wer­den. Ein besonderer Vorteil dieser Sicherungsvorrichtung ist die Unabhängigkeit der Entsicherung von einer Drallbewegung des Geschosses. Die Sicherung bzw. Entsicherung erfolgt in der gleichen Weise, unabhängig davon, ob sich das Geschoß um seine Längsachse dreht oder nicht. Bevorzugt ist jedoch die Vorrich­tung für drallose Geschosse.The role of the wound spring assembly is to prevent the ignition needle from approaching the ignition bolt due to its presence in the intermediate space. Additional spacers or a lock washer are not required. When the cage slides over the coil spring assembly due to its inertia, the outermost layer of the outer coil spring immediately begins to relax. The relaxation of the spiral spring runs consecutively from the outside in, never distributed over the entire length of the spring at the same time. According to the invention, several spiral springs are to be wound one above the other, with the winding direction changing with each spring. As a result, the rotation of the spring assembly is calmed down and reversed each time a spring changes to another; the sequence of the next counter-rotating spring therefore starts again from zero. As a result, considerable delay times can be generated reliably and reproducibly with just three springs wound in opposite directions. The coil springs are to be dimensioned such that after relaxation the inner diameter has become so large that the firing pin can be moved uninhibitedly in the direction of the firing needle. Through the parameters spring length, spring strength, degree of tension, due to the diameter of the cage and the pretreatment of the spring, as well as through the rubbing of the band layers against each other, the time can be measured very precisely with simple means, in which ignition may not occur. A particular advantage of this safety device is that the safety is independent of a swirl movement of the projectile. Securing or unlocking takes place in the same way, regardless of whether the projectile rotates about its longitudinal axis or not. However, the device for twistless projectiles is preferred.

Bei der erfindungsgemäßen Vorrohrsicherung läßt sich auch in einfachster Weise eine an sich bekannte Transprortsicherung verwirklichen, indem der Käfig durch einen seitlichen Siche­rungsstift in axialer Richtung fixiert wird.In the fore-pipe safety device according to the invention, a known transport safety device can also be implemented in the simplest manner by the cage being fixed in the axial direction by a lateral securing pin.

Wird oberhalb und/oder unterhalb des Spiralfederpakets ein scheibenförmiger Permanentmagnet mit einer Magnetisierung im wesentlichen in der Scheibenebene angebracht, wird die Rotation des Federpakets beim Entspannen gebremst. Auf diese Weise kann die Sicherungszeit vergrößert werden.If a disk-shaped permanent magnet with a magnetization essentially in the disk plane is attached above and / or below the coil spring assembly, the rotation of the spring assembly is braked when it relaxes. In this way, the backup time can be increased.

Die Erfindung ist in der Zeichnung dargestellt und wird im folgenden weiter beispielhaft erläutert. Es zeigen:

  • Figur 1 Schnitt durch den Geschoßkopf;
  • Figur 2 Draufsicht auf ein Federpaket;
  • Figur 3 Geschoßkopf mit magnetischer Bremse;
  • Figur 4 Federpaket mit gewelltem Ende der äußersten Feder.
The invention is illustrated in the drawing and is further explained below by way of example. Show it:
  • Figure 1 section through the projectile head;
  • Figure 2 top view of a spring assembly;
  • Figure 3 projectile head with magnetic brake;
  • Figure 4 spring package with a corrugated end of the outermost spring.

Die Figur l zeigt einen Geschoßkopf 1 mit der erfindungsgemäßen Vorrohrsicherung. Die linke Hälfte zeigt die gesicherte Stel­lung; in der rechten Hälfte ist die Vorrohrsicherung ausge­schaltet und der axial bewegliche Zündbolzen 2 aufgrund seiner Trägheit beim Aufschlag auf die Zündnadel 3 auf der Zündnadel­scheibe 4 aufgeschlagen.Figure 1 shows a projectile head 1 with the front pipe protection according to the invention. The left half shows the secured position; in the right half the fore-pipe safety device is switched off and the axially movable ignition pin 2 is opened on the ignition needle disk 4 due to its inertia when it strikes the ignition needle 3.

In gesichertem Zustand reicht das von einem Käfig 5 in Form eines Kreisrings umfaßte Spiralfederpaket 6 soweit in den Raum zwischen Zündnadel 3 und der Vorderseite des Zündbolzens 2 hin­ ein, daß auch bei höchsten Beschleunigungen wegen der Steifig­keit des Federpakets 6 eine Berührung der Zündnadel 3 am Zünd­bolzen 2 ausgeschlossen ist. Im linken Teilbild ist noch ein Sicherungsstift 7 zu erkennen, der als Transportsicherung dient. Solange dieser Stift 7 nicht herausgezogen ist, kann sich der Käfig 5 auch bei größten Beschleunigungen nicht bewe­gen und daher ist ein Zünden unmöglich. Vor dem Laden wird der Stift 7 entfernt.In the secured state, the spiral spring assembly 6, which is surrounded by a cage 5 in the form of a circular ring, extends as far as into the space between the firing needle 3 and the front of the firing pin 2 a that even at the highest accelerations due to the rigidity of the spring assembly 6, touching the firing needle 3 on the firing pin 2 is excluded. In the left part of the picture, a locking pin 7 can still be seen, which serves as a transport lock. As long as this pin 7 is not pulled out, the cage 5 cannot move even under the greatest accelerations, and ignition is therefore impossible. The pin 7 is removed before loading.

Beim Abschuß wird der Käfig 5 aufgrund der Beschleunigung nach hinten über den Zündbolzen 2 rutschen. Sobald das Federpaket nicht mehr von dem Käfig 5 umfaßt ist, beginnt das Entspannen des aufgewickelten Federpaketes 6.When fired, the cage 5 will slide over the ignition pin 2 due to the acceleration. As soon as the spring assembly is no longer encased in the cage 5, the wound spring assembly 6 begins to relax.

Das aus drei Einzelfedern 8, 9, 10 aufgewickelte Federpaket 6 ist in Figur 2 beser zu erkennen. Die innere strichpunktierte Linie 11 zeigt den Innendurchmesser des Käfigs 5 an und stimmt etwa mit dem Außendurchmesser des Zündbolzens 2 überein. Die äußere strichpunktierte Linie 12 gibt den Außendurchmesser des Käfigs 5 bzw. der Innenwand des Geschoßkopfes wieder und kenn­zeichnet den maximal zur Verfügung stehenden Raum, in den das Federpaket 6 expandieren kann. Der Raum ist so groß, daß im entspannten Zustand des Federpaketes 6 der innere, näherungs­weise kreisförmige Raum 13 so groß geworden ist, daß der vor­dere Teil des Zündbolzens 2 durchgelassen wird.The spring assembly 6 wound from three individual springs 8, 9, 10 can be seen better in FIG. 2. The inner dash-dotted line 11 indicates the inner diameter of the cage 5 and corresponds approximately to the outer diameter of the firing pin 2. The outer dash-dotted line 12 represents the outer diameter of the cage 5 or the inner wall of the projectile head and indicates the maximum available space into which the spring assembly 6 can expand. The space is so large that in the relaxed state of the spring assembly 6 the inner, approximately circular space 13 has become so large that the front part of the firing pin 2 is let through.

In der Figur 2 ist der Zustand dargestellt, bei dem der Käfig 5 gerade auf den Zündbolzen gerutscht ist und das Entspannen des Federpaketes 6 beginnt. Der Anfang 14 der Feder 8 liegt außen an der Wand 12 am Geschoß an und der Rest des Federpaketes 6 ist bestrebt, sich entlang der Wandung 12 des neu entstandenen größeren Freiraums in drehender Weise abzuwickeln. Das Federpa­ket 6 rotiert mit zunehmender Drehgeschwindigkeit aber immer noch geschlossenem inneren Wickelkern bis zum Ende des Feder­bandes 8.FIG. 2 shows the state in which the cage 5 has just slipped onto the ignition bolt and the spring assembly 6 begins to relax. The beginning 14 of the spring 8 lies against the wall 12 on the floor and the rest of the spring assembly 6 endeavors to unwind in a rotating manner along the wall 12 of the newly created larger free space. The spring assembly 6 rotates with increasing rotational speed but still closed inner winding core up to the end of the spring band 8.

Die zu diesem Zeitpunkt immer noch stramm gewickelten Federn 9, 10 rotieren mit so hoher Geschwindigkeit, daß zuerst kein Ab­wickeln des mittleren 9 und inneren 10 Federbandes möglich ist, weil das mittlere Federband 9 zum Abwickeln erst die Drehrich­tung ändern muß. Erst nach Drehstillstand des Federpaketes 6 kann sich die obere Lage des mittleren Wickels 9 von dem immer noch festen Restfederpaket lösen. Danach folgt das Abwickeln der mittleren Feder 9, indem sich die Feder wie beim äußeren Wickelband 8 nach außen an die entspannte Feder 8 anlegt und in entgegengesetzter Richtung zu rotieren beginnt. Die innerste Feder 10 bleibt solange fest gespannt, bis das Federpaket er­neut zum Stillstand kommt und sich der Federanfang der Feder 10 an die expandierte Feder 9 anliegend zu entspannen und zu ro­tieren beginnt.The springs 9, 10, which are still tightly wound at this time, rotate at such a high speed that it is initially not possible to unwind the middle 9 and inner 10 spring band, because the middle spring band 9 first has to change the direction of rotation in order to unwind. Only after the spring assembly 6 has come to a standstill can the upper layer of the middle winding 9 separate from the still fixed spring assembly. This is followed by the unwinding of the middle spring 9 in that the spring rests on the relaxed spring 8, as in the outer winding band 8, and begins to rotate in the opposite direction. The innermost spring 10 remains tightly tensioned until the spring assembly comes to a standstill again and the beginning of the spring 10 of the spring rests against the expanded spring 9 and begins to relax and rotate.

Am Ende des Entspannens liegt das Ende der Feder 10 ganz dicht innen an dem im Durchmesser vergrößerten ringförmigen Federpa­ket an und die mittlere Öffnung 13 ist so groß, daß auch die Feder 10 die axiale Bewegung des Anzündbolzens 2 nicht mehr be­hindern kann.At the end of the relaxation, the end of the spring 10 lies very close to the ring-shaped spring assembly, which has an enlarged diameter, and the central opening 13 is so large that the spring 10 can no longer hinder the axial movement of the firing pin 2.

Die Zeit, die vergeht, bis das enge Federpaket 6 zu einem größeren, auch wieder ringförmigen Federpaket expandiert ist, hängt von verschiedenen Größen ab und ist sehr gut einstellbar. Wichtig sind die Länge, die S|pannkraft und die Reibung der Bandlagen gegeneinander. Das Entspannen und damit auch das Ro­tieren des Federpaketes läßt sich vorteilhaft magnetisch brem­sen, was eine Vergrößerung der Sicherungszeit zur Folge hat.The time that passes until the narrow spring assembly 6 is expanded into a larger, again annular spring assembly depends on different sizes and is very easy to adjust. The length, the tensioning force and the friction of the belt layers against each other are important. The relaxation and thus also the rotation of the spring assembly can advantageously be magnetically braked, which results in an increase in the backup time.

Eine Sicherungeinrichtung mit einer magnetischen Bremse ist in Figur 3 dargestellt. In der linken Hälfte ist wie in Figur 1 der gesicherte Zustand dargestellt; die rechte Hälfte zeigt den Zustand beim Aufschlag: die Zündnadel 3 ist beim Abbremsen in den nach vorne bewegten Zündbolzen 2 eingedrungen. Die Teile sind mit den gleichen Bezugszeichen wie in Figur 1 bezeichnet.A safety device with a magnetic brake is shown in Figure 3. The secured state is shown in the left half as in FIG. 1; the right half shows the state of the impact: the firing needle 3 penetrated the firing pin 2 which was moved forward when braking. The parts are identified by the same reference numerals as in FIG. 1.

Die Zündnadelscheibe 4 ist hier etwas nach oben aufgebogen. Sie nimmt eine ringförmige Scheibe 15 eines Permanentmagneten auf. Sie ist so magnetisiert, daß im wesentlichen die Magnetisie­rungsrichtung in der Ringebene verläuft und sich die beiden Pole auf der Scheibe gegenüberliegend bilden und die Feldlinien überwiegend senkrecht zu den Spiralfedern des Federpaketes 6 verlaufen.The ignition needle disk 4 is slightly bent upwards here. It receives an annular disc 15 of a permanent magnet. It is magnetized in such a way that the direction of magnetization essentially runs in the ring plane and the two poles on the disk form opposite each other and the field lines run predominantly perpendicular to the coil springs of the spring assembly 6.

In der Figur 4 ist ein etwas modifiziertes Federpaket 6 darge­stellt. Der Anfang 16 der äußersten Spiralfeder 8 ist hier ge­wellt. Dadurch wird verhindert, daß sich die äußerste Windung der Spiralfeder beim Abziehvorgang des Käfigs vom Spiralfeder­paket zwischen Käfig und Zündbolzen schieben kann.A somewhat modified spring assembly 6 is shown in FIG. The beginning 16 of the outermost coil spring 8 is corrugated here. This prevents the outermost turn of the coil spring from being able to slide between the cage and the firing pin when the cage is removed from the coil spring assembly.

Claims (3)

1. Vorrohrsicherung an einem Geschoß mit Aufschlagzünder, mit einer von einem Käfig umgebenen gespannten Spiralfeder, durch die ein Raum zwischen Zündbolzen und Zündnadel so­weit ausgefüllt wird, daß eine Berührung des Zündbolzens durch die Zündnadel ausgeschlossen ist, und die Spiralfe­der erst nach Schußabgabe durch eine Verschiebung des Kä­figs die Möglichkeit erhält, sich zu entspannen, daher der erwähnte Raum frei wird und dadurch eine Bewegung des Zündbolzens möglich werden kann, dadurch ge­kennzeichnet, daß ein Spiralfederpaket (6) mit mehreren hintereinander jeweils gegenläufig gewickelten Spiralfedern (8, 9, 10) in den Käfig (5) eingesetzt ist.1.Free tube protection on a projectile with impact detonator, with a tensioned coil spring surrounded by a cage, through which a space between the firing pin and firing needle is filled to such an extent that touching the firing pin by the firing needle is excluded, and the coil spring only after firing by a displacement of the cage is given the opportunity to relax, therefore the space mentioned becomes free and movement of the firing pin can become possible, characterized in that a coil spring package (6) with a plurality of coil springs (8, 9, 10) wound in opposite directions one behind the other in the cage (5) is inserted. 2. Vorrohrsicherung nach Anspruch 1, dadurch gekennzeichnet, daß das Spiralfederpaket (6) aus drei Spiralfedern (8, 9, 10) besteht.2. Front pipe protection according to claim 1, characterized in that the coil spring assembly (6) consists of three coil springs (8, 9, 10). 3. Vorrohrsicherung nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß eine magnetisierte Platte (15) über dem Spi­ralfederpaket (6) vorhanden ist.3. Front pipe protection according to claim 1 or 2, characterized in that a magnetized plate (15) over the coil spring assembly (6) is present.
EP88119087A 1987-11-20 1988-11-17 After-firing safety device for a missile with an impact fuse Expired - Lifetime EP0316894B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3739368 1987-11-20
DE19873739368 DE3739368A1 (en) 1987-11-20 1987-11-20 PRE-TUBE SECURITY ON A FLOOR WITH AN IMPELLER

Publications (2)

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EP0316894A1 true EP0316894A1 (en) 1989-05-24
EP0316894B1 EP0316894B1 (en) 1990-08-22

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EP88119087A Expired - Lifetime EP0316894B1 (en) 1987-11-20 1988-11-17 After-firing safety device for a missile with an impact fuse

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US (1) US4938139A (en)
EP (1) EP0316894B1 (en)
JP (1) JPH01167600A (en)
KR (1) KR890008545A (en)
AU (1) AU611725B2 (en)
CA (1) CA1320073C (en)
DE (2) DE3739368A1 (en)
ES (1) ES2017006B3 (en)
GR (1) GR3000973T3 (en)
IL (1) IL88417A (en)
IN (1) IN171682B (en)
MY (1) MY103479A (en)
PT (1) PT89038B (en)
SG (1) SG97091G (en)
TR (1) TR23888A (en)

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US4788062A (en) * 1987-02-26 1988-11-29 Alza Corporation Transdermal administration of progesterone, estradiol esters, and mixtures thereof
US5067405A (en) * 1990-04-12 1991-11-26 Dragolyoub Popovitch Safing and arming device
FR2714169B1 (en) * 1993-12-17 1996-02-09 Manurhin Defense Safety device for locking a striker and method of manufacturing this device.
US7565795B1 (en) * 2006-01-17 2009-07-28 Pratt & Whitney Rocketdyne, Inc. Piezo-resonance igniter and ignition method for propellant liquid rocket engine
US20080299504A1 (en) * 2007-06-01 2008-12-04 Mark David Horn Resonance driven glow plug torch igniter and ignition method
US8814562B2 (en) * 2008-06-02 2014-08-26 Aerojet Rocketdyne Of De, Inc. Igniter/thruster with catalytic decomposition chamber
US8161725B2 (en) 2008-09-22 2012-04-24 Pratt & Whitney Rocketdyne, Inc. Compact cyclone combustion torch igniter
KR101670253B1 (en) 2010-02-16 2016-10-31 삼성전자 주식회사 Method and device for controlling network access of ue in wireless communication system
GB2493574A (en) 2011-11-10 2013-02-13 Renesas Mobile Corp Transmission of closed subscriber group identifiers (CSG IDs) based on load condition of a cell
CN111650402B (en) * 2020-05-14 2022-04-12 南京理工大学 Trajectory vertex identification method based on triaxial accelerometer

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FR2533686A1 (en) * 1982-09-24 1984-03-30 Manurhin SECURITY DEVICE WITH A ROTATING CAGE FOR A GIRATORY PROJECTILE

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DE2735575A1 (en) * 1977-08-06 1979-02-15 Rheinmetall Gmbh SURCHARGE FOR SWIVEL FLOORS
DE3151470A1 (en) * 1981-12-24 1983-07-14 Gebrüder Junghans GmbH, 7230 Schramberg BAND FOR SPIRAL-RELATED IGNITION OF BUMPER IGNITIONS
FR2533686A1 (en) * 1982-09-24 1984-03-30 Manurhin SECURITY DEVICE WITH A ROTATING CAGE FOR A GIRATORY PROJECTILE

Also Published As

Publication number Publication date
PT89038A (en) 1989-09-14
CA1320073C (en) 1993-07-13
AU611725B2 (en) 1991-06-20
SG97091G (en) 1992-02-14
DE3739368C2 (en) 1991-06-06
IN171682B (en) 1992-12-05
AU2419288A (en) 1989-05-25
JPH01167600A (en) 1989-07-03
DE3860491D1 (en) 1990-09-27
TR23888A (en) 1990-10-17
ES2017006B3 (en) 1990-12-16
US4938139A (en) 1990-07-03
MY103479A (en) 1993-06-30
PT89038B (en) 1993-11-30
KR890008545A (en) 1989-07-12
EP0316894B1 (en) 1990-08-22
IL88417A0 (en) 1989-06-30
DE3739368A1 (en) 1989-06-01
GR3000973T3 (en) 1991-12-10
IL88417A (en) 1993-01-14

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