EP0316894B1 - 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
EP0316894B1
EP0316894B1 EP88119087A EP88119087A EP0316894B1 EP 0316894 B1 EP0316894 B1 EP 0316894B1 EP 88119087 A EP88119087 A EP 88119087A EP 88119087 A EP88119087 A EP 88119087A EP 0316894 B1 EP0316894 B1 EP 0316894B1
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EP
European Patent Office
Prior art keywords
spring assembly
cage
safety
spiral spring
case
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 - Lifetime
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EP88119087A
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German (de)
French (fr)
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EP0316894A1 (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 down pipe protection on a projectile with impact ignition according to the preamble of claim 1.
  • a pipe protection on a swirl-free projectile with impact ignition is known, in which the ignition needle is held at a distance from the ignition charge carrier (detonator) by means of a tape wrap in the form of a coil spring wound in one direction, which in turn by means of an overlapping one Cage is fixed in the tensioned state.
  • the cage When fired, the cage is moved axially forward under the action of the propellant gases so that the coil spring is released and can relax radially outwards, whereby it rests against the inner wall of an enlarged cavity of the cage.
  • This cavity adjoins the front area of the cage which fixes the tensioned spiral spring and which has a correspondingly smaller inner diameter.
  • the diameter of the cavity is such that the relaxed coil spring no longer locks the ignition needle, i.e. no longer keeps the two mutually movable parts of the ignition chain comprising the ignition needle and the charge carrier at a distance from one another.
  • the firing pin can therefore move forward against the detonator upon impact and cause its initiation.
  • the disadvantage here is that the release is done very quickly by the tape winding wound in only one direction and can only be varied within very narrow limits.
  • a front pipe protection for swirl projectiles with impact ignition is known from DE-A 2 457 947, in which a three-part tape winding package is provided, the inner tape winding resting on locking balls for locking a contact pin of the ignition chain and being made of such a material that it can accommodate the radial pressure the locking ball withstands without deformation.
  • the central band wrap determines the front pipe safety as the main wrap and the outer band wrap particularly determines the transport safety.
  • the main winding is preferably wound in the twist direction and the other two tape windings against the twist direction.
  • the tape winding package is opened here exclusively by the centrifugal force acting fully on the swirl projectile after leaving the pipe mouth, the safety of the down pipe being determined by the main winding and thus within very narrow limits.
  • the object of the invention is a precise, simple safety devices on the impact detonator of swirlless projectiles, which acts over an adjustable, even longer time range.
  • This downpipe protection is intended for impact detonators of swirlless projectiles.
  • the coiled coil spring package surrounded by the cage due to its presence in the space between the two parts of the ignition chain, prevents the ignition needle from approaching the ignition charge carrier.
  • 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 wound one above the other, the winding direction changing with each spiral spring. This always calms and reverses the rotations of the remaining spring assembly when changing from one spiral spring to another; the sequence of the next counter-rotating spiral spring therefore starts again from zero.
  • considerable delay times can be generated reliably and reproducibly with just three coil springs wound in opposite directions. This unlocking takes place independently of a swirl movement of a projectile, which makes this fore-pipe protection suitable for swirlless projectiles.
  • the coil springs are to be dimensioned such that after relaxation, the inner diameter has become so large that the ignition charge carrier can be moved uninhibited in the direction of the ignition needle.
  • 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 by rubbing the belt layers against each other, can be used to set the time in which ignition should not occur very easily.
  • 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 I 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 down pipe protection 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 pin 3 and the front of the firing pin 2 out 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 pin 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 strives 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 tension 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.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Fuses (AREA)
  • Toys (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

1. Within barrel safety mechanism on a projectile with contact detonation by means of a multi-part band winding assembly, in which the individual windings are wound up, in each case, in opposite directions and which, in the safety state, keeps two parts of a detonating train, which can be moved relative to each other, at a distance from each other and also frees their movement in the state of safety take-off, characterised in that in the case of a non-spin projectile the winding is formed as spiral springs (8, 9, 10) and in the safety state is surrounded by a cage (5) which can be displaced in the event of discharge, in which case after freeing of the spiral spring assembly (6) by the cage (5) the unwinding process occurs in such a way that in the first instance the outermost spiral spring (8) is released progressively from the outside inwards and thereby sets the remaining spring assembly (6) into rotation and when there is a change-over to the next outer spiral spring (9) of the remaining spring assembly (6) and the latter is released stoppage and subsequent reversal of the rotation of the respectively remaining spring assembly (6) result.

Description

Die Erfindung betrifft eine Vorrohrsicherung an einem Geschoß mit Aufschlagzündung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a down pipe protection on a projectile with impact ignition according to the preamble of claim 1.

Aus der FR-A 1 198 830 ist eine Vorrohrsicherung an einem drallosen Geschoß mit Aufschlagzündung bekannt, bei welcher die Zündnadel mit Abstand vom Zündladungsträger (Detonator) mittels eines Bandwickels in Gestalt einer in einer Richtung gewickelten Spiralfeder gehalten wird, die ihrerseits mittels eines sie übergreifenden Käfigs im gespannten Zustand fixiert ist. Beim Abschuß wird der Käfig unter Einwirkung der Treibgase so axial nach vorn verschoben, daß die Spiralfeder freigegeben wird und sich radial nach außen entspannen kann, wobei sie sich an die Innenwandung eines im Durchmesser vergrößerten Hohlraumes des Käfigs anlegt. Dieser Hohlraum schließt sich an den vorderen, die gespannte Spiralfeder fixierenden Bereich des Käfigs, der einen entsprechend kleineren Innendurchmesser aufweist, an. Der Durchmesser des Hohlraums ist so bemessen, daß die entspannte Spiralfeder die Zündnadel nicht mehr arretiert, d.h. die beiden gegeneinander beweglichen Teile der Zündkette aus Zündnadel und Zündladungsträger nicht mehr im Abstand voneinander hält. Die Zündnadel kann sich daher beim Aufschlag im Ziel gegen den Detonator nach vor bewegen und dessen Initiierung bewirken. Nachteilig hierbei ist, daß die Entsicherung durch den in nur einer Richtung gewickelten Bandwickel sehr schnell erfolgt und nur in sehr engen Grenzen variierbar ist.From FR-A 1 198 830 a pipe protection on a swirl-free projectile with impact ignition is known, in which the ignition needle is held at a distance from the ignition charge carrier (detonator) by means of a tape wrap in the form of a coil spring wound in one direction, which in turn by means of an overlapping one Cage is fixed in the tensioned state. When fired, the cage is moved axially forward under the action of the propellant gases so that the coil spring is released and can relax radially outwards, whereby it rests against the inner wall of an enlarged cavity of the cage. This cavity adjoins the front area of the cage which fixes the tensioned spiral spring and which has a correspondingly smaller inner diameter. The diameter of the cavity is such that the relaxed coil spring no longer locks the ignition needle, i.e. no longer keeps the two mutually movable parts of the ignition chain comprising the ignition needle and the charge carrier at a distance from one another. The firing pin can therefore move forward against the detonator upon impact and cause its initiation. The disadvantage here is that the release is done very quickly by the tape winding wound in only one direction and can only be varied within very narrow limits.

Eine Vorrohrsicherung für Drallgeschosse mit Aufschlagzündung ist aus der DE-A 2 457 947 bekannt, bei welcher ein dreiteiliges Bandwickelpaket vorgesehen ist, wobei der innere Bandwickel an Sperrkugeln zur Arretierung eines Kontaktstiftes der Zündkette anliegt und aus einem solchen Material hergestellt ist, daß er dem Radialdruck der Sperrkugel ohne Deformierungen standhält. Der mittlere Bandwickel bestimmt als Hauptwickel die Vorrohrsicherheit und der äußere Bandwickei insbesondere die Transportsicherheit. Der Hauptwickel ist dabei vorzugsweise in Drallrichtung und die beiden anderen Bandwickel gegen die Drallrichtung aufgezogen. Die Öffnung des Bandwickelpaketes erfolgt hier ausschließlich durch die nach dem Verlassen der Rohrmündung voll auf das Drallgeschoß einwirkende Fliehkraft, wobei die Vorrohrsicherheit durch den Hauptwickel und damit in sehr engen Grenzen bestimmt ist.A front pipe protection for swirl projectiles with impact ignition is known from DE-A 2 457 947, in which a three-part tape winding package is provided, the inner tape winding resting on locking balls for locking a contact pin of the ignition chain and being made of such a material that it can accommodate the radial pressure the locking ball withstands without deformation. The central band wrap determines the front pipe safety as the main wrap and the outer band wrap particularly determines the transport safety. The main winding is preferably wound in the twist direction and the other two tape windings against the twist direction. The tape winding package is opened here exclusively by the centrifugal force acting fully on the swirl projectile after leaving the pipe mouth, the safety of the down pipe being determined by the main winding and thus within very narrow limits.

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

Diese Aufgabe wird, ausgehend von der DE-A 2 457 947, von einer Vorrohrsicherung gemäß dem Oberbegriff des Anspruchs 1 entsprechend den Merkmalen des Kennzeichens dieses Anspruchs gelöst.Starting from DE-A 2 457 947, this object is achieved by a front pipe protection according to the preamble of claim 1 in accordance with the features of the characterizing part of this claim.

Diese Vorrohrsicherung ist für Aufschlagzünder von drallosen Geschossen bestimmt. Das von dem Käfig umgebene, aufgewickelte Spiralfederpaket verhindert durch sein Vorhandensein in dem Raum zwischen den beiden Teilen der Zündkette die Annäherung der Zündnadel an den Zündladungsträger. 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 gewickelt, wobei sich der Wickelsinn bei jeder Spiralfeder ändert. Dadurch kommt es jedesmal zu einer Beruhigung und einer Umkehr der Rotationen des restlichen Federpaketes beim Übergang von einer Spiralfeder auf eine andere; der Ablauf der nächsten gegenläufigen Spiralfeder fängt also jeweils wieder bei Null an. Das hat zur Folge, daß man schon mit drei gegenläufig gewickelten Spiralfedern erhebliche Verzögerungszeiten sicher und reproduzierbar erzeugen kann. Diese Entsicherung erfolgt unabhängig von einer Drallbewegung eines Geschosses, wodurch diese Vorrohrsicherung für drallose Geschosse geeignet ist.This downpipe protection is intended for impact detonators of swirlless projectiles. The coiled coil spring package surrounded by the cage, due to its presence in the space between the two parts of the ignition chain, prevents the ignition needle from approaching the ignition charge carrier. 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 wound one above the other, the winding direction changing with each spiral spring. This always calms and reverses the rotations of the remaining spring assembly when changing from one spiral spring to another; the sequence of the next counter-rotating spiral spring therefore starts again from zero. As a result, considerable delay times can be generated reliably and reproducibly with just three coil springs wound in opposite directions. This unlocking takes place independently of a swirl movement of a projectile, which makes this fore-pipe protection suitable for swirlless projectiles.

Die Spiralfedern sind dabei so zu bemessen, daß nach dem Entspannen der Innendurchmesser so groß geworden ist, daß der Zündladungsträger 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 Mittel die Zeit, in der es nicht zu einer Zündung kommen darf, eingestellt werden.The coil springs are to be dimensioned such that after relaxation, the inner diameter has become so large that the ignition charge carrier can be moved uninhibited in the direction of the ignition needle. 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 by rubbing the belt layers against each other, can be used to set the time in which ignition should not occur very easily.

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 the tension is released. 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 I 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 I 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 down pipe protection 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 Zündnadei 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 pin 3 and the front of the firing pin 2 out 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 backwards over the ignition pin 2 due to the acceleration. As soon as the spring assembly is no longer included 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 pin 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 strives 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 10 relaxes and begins to rotate against the expanded spring 9.

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 Spannkraft 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 tension 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. Within barrel safety mechanism on a projectile with contact detonation by means of a multi-part band winding assembly, in which the individual windings are wound up, in each case, in opposite directions and which, in the safety state, keeps two parts of a detonating train, which can be moved relative to each other, at a distance from each other and also frees their movement in the state of safety take- off, characterised in that in the case of a non-spin projectile the winding is formed as spiral springs (8, 9, 10) and in the safety sate is surrounded by a cage (5) which can be displaced in the event of discharge, in which case after freeing of the spiral spring assembly (6) by the cage (5) the unwinding process occurs in such a way that in the first instance the outermost spiral spring (8) is released progressively from the outside inwards and thereby sets the remaining spring assembly (6) into rotation and when there is a change-over to the next outer spiral spring (9) of the remaining spring assembly (6) and the latter is released stoppage and subsequent reversal of the rotation of the respectively remaining spring assembly (6) result.
2. Within barrel safety mechanism according to claim 1, characterised in that the spiral spring assembly (6) consists of three spiral springs (8, 9, 10). 3. Within barrel safety mechanism according to claim 1 or 2, characterised in that a magnetized plate (15) is present above/below the spiral spring assembly (6).
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 EP0316894A1 (en) 1989-05-24
EP0316894B1 true 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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Also Published As

Publication number Publication date
IL88417A (en) 1993-01-14
IN171682B (en) 1992-12-05
AU611725B2 (en) 1991-06-20
PT89038A (en) 1989-09-14
GR3000973T3 (en) 1991-12-10
US4938139A (en) 1990-07-03
JPH01167600A (en) 1989-07-03
PT89038B (en) 1993-11-30
SG97091G (en) 1992-02-14
TR23888A (en) 1990-10-17
MY103479A (en) 1993-06-30
KR890008545A (en) 1989-07-12
AU2419288A (en) 1989-05-25
CA1320073C (en) 1993-07-13
DE3739368A1 (en) 1989-06-01
EP0316894A1 (en) 1989-05-24
IL88417A0 (en) 1989-06-30
ES2017006B3 (en) 1990-12-16
DE3739368C2 (en) 1991-06-06
DE3860491D1 (en) 1990-09-27

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