EP0235115B1 - Proximity fuze for firing a hollow charge, in particular for a mine - Google Patents

Proximity fuze for firing a hollow charge, in particular for a mine Download PDF

Info

Publication number
EP0235115B1
EP0235115B1 EP19870890004 EP87890004A EP0235115B1 EP 0235115 B1 EP0235115 B1 EP 0235115B1 EP 19870890004 EP19870890004 EP 19870890004 EP 87890004 A EP87890004 A EP 87890004A EP 0235115 B1 EP0235115 B1 EP 0235115B1
Authority
EP
European Patent Office
Prior art keywords
ferrite ring
resonant circuit
proximity switch
target
cylindrical coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19870890004
Other languages
German (de)
French (fr)
Other versions
EP0235115A1 (en
Inventor
Reinhard Zierler
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.)
Intertechnik Techn Produktionen GmbH
Original Assignee
Intertechnik Techn Produktionen GmbH
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 Intertechnik Techn Produktionen GmbH filed Critical Intertechnik Techn Produktionen GmbH
Publication of EP0235115A1 publication Critical patent/EP0235115A1/en
Application granted granted Critical
Publication of EP0235115B1 publication Critical patent/EP0235115B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C13/00—Proximity fuzes; Fuzes for remote detonation
    • F42C13/003—Proximity fuzes; Fuzes for remote detonation operated by variations in electrostatic field
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B23/00—Land mines ; Land torpedoes
    • F42B23/04—Land mines ; Land torpedoes anti-vehicle, e.g. anti-aircraft or anti tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C13/00—Proximity fuzes; Fuzes for remote detonation
    • F42C13/06—Proximity fuzes; Fuzes for remote detonation operated by sound waves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C13/00—Proximity fuzes; Fuzes for remote detonation
    • F42C13/08—Proximity fuzes; Fuzes for remote detonation operated by variations in magnetic field
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C14/00—Mechanical fuzes characterised by the ammunition class or type
    • F42C14/08—Mechanical fuzes characterised by the ammunition class or type for land mines

Definitions

  • the invention relates to a proximity switch for igniting a shaped charge, in particular for a mine, using an electrical resonant circuit with a solenoid.
  • proximity switches for detonating the explosive charge, these proximity switches being controlled by sound waves or changes in a magnetic field.
  • Proximity switches with a particularly simple design and reliable function are obtained on the basis of resonant circuits that are detuned by the approaching vehicle and trigger the mine to ignite.
  • Such proximity switches based on electrical resonant circuits cannot, however, be used to ignite shaped charges because the metallic hollow body in front of the explosive charge causes excessive damping of the resonant circuit due to the eddy currents induced in the hollow body.
  • the invention is therefore based on the object to avoid this deficiency and to provide a proximity switch for igniting a shaped charge on the basis of an electrical resonant circuit, the responsiveness of which is not impaired by the hollow metal body of the shaped charge.
  • the invention solves the stated problem in that the upstream of the metallic hollow body of the shaped charge, with an electrostatic shield ver seen solenoid of the resonant circuit on its side facing away from the target with a coaxial ferrite ring is connected and electrically insulated.
  • the field lines of the electromagnetic field excited by the cylindrical coil penetrate the ferrite ring essentially radially due to the magnetic resistance of the ferrite ring, which is substantially lower than air, so that a disturbing field propagation in the area of the metallic hollow body of the shaped charge is prevented. Therefore, no eddy currents will be induced in the hollow metal body of the shaped charge.
  • the ferrite ring can be produced from a material of high permeability and a comparatively large specific ohmic resistance, the eddy currents induced by the coil field in the ferrite core can be reduced to an allowable level without endangering the functionality of the proximity switch.
  • the proximity switch should only respond when the target is at a comparatively small distance from the shaped charge, and a corresponding spreading of the coil field in the direction of the target by the ferrite ring on the side of the coil remote from the target cannot be prevented.
  • the ferrite ring can be connected to the cylindrical coil of the resonant circuit in various ways, since it is only a matter of a displacement-resistant assignment of the ferrite ring to the cylindrical coil. Particularly advantageous design conditions are ensured, however, in that the ferrite ring is connected to the cylindrical coil of the resonant circuit by an electrically insulating adhesive layer.
  • This adhesive not only makes other connecting means which may influence the formation of the coil field superfluous, but also provides effective electrical insulation between the solenoid or its electrostatic shielding and the ferrite ring.
  • the solenoid with the ferrite ring can first be inserted into a plastic housing, which is then filled with the potting compound, which preferably consists of a permanently elastic material is formed.
  • the shaped charge shown consists of a plastic housing 1, which is filled with explosive 2 and is terminated on the target side by a metallic hollow body 3, usually in the form of a hollow cone.
  • the housing 1 forms an annular receptacle 4 for the solenoid 5 of a resonant circuit, not shown, of a proximity switch for igniting the shaped charge.
  • This solenoid 5 is provided with an electrostatic shield 6 and connected on its side facing away from the target with a coaxial ferrite ring 7 fixed against displacement.
  • An adhesive layer 8 is used to connect the ferrite ring 7 and the solenoid 5, which at the same time provides electrical insulation between the ferrite ring 7 and the electrostatic shield 6 or the solenoid 5.
  • Cylinder coil 5 of the proximity switch is embedded within the annular receptacle 4 of the plastic housing 1 in a permanently elastic potting compound 9, which ensures that the cylinder coil 5 is held well with the ferrite ring 7.
  • the ferrite ring 7 Since the ferrite ring 7 has a very small magnetic resistance to air, the field lines of the electromagnetic field excited by the solenoid 5 of the resonant circuit close via this ferrite ring 7, so that the metallic hollow body 3 of the shaped charge lies in an essentially field-free space. In the metallic hollow body 3, therefore, no eddy currents which dampen the resonant circuit in an impermissible manner can be induced.
  • the induction of eddy currents in the ferrite ring 7 can be limited to an admissible value without difficulty because the material for the ferrite ring 7 can have a high permeability and a comparatively large specific ohmic resistance, which prevents the induction of larger eddy currents and thus the damping of the resonant circuit in an acceptable area.
  • a sufficiently large coil field can thus form in the direction of the target, which is changed by the target when the target approaches, so that the associated detuning of the resonant circuit of the proximity switch for igniting the shaped charge can be exploited.
  • proximity switches according to the invention can be used with particular advantage in the case of shaped charges for mines, the invention is of course not restricted to this application. Missiles, grenades and projectiles with shaped charges can also be provided with such proximity switches if the shaped charge needs to be detonated at a certain distance from the target.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Description

Die Erfindung bezieht sich auf einen Annäherungsschalter zum Zünden einer Hohlladung, insbesondere für eine Mine, unter Verwendung eines elektrischen Schwingkreises mit einer Zylinderspule.The invention relates to a proximity switch for igniting a shaped charge, in particular for a mine, using an electrical resonant circuit with a solenoid.

Bei Minen zur Bekämpfung von Landfahrzeugen ist es bekannt, Annäherungsschalter zum Zünden der Sprengladung vorzusehen, wobei diese Annäherungsschalter durch Schallwellen oder Veränderungen eines magnetischen Feldes gesteuert werden. Besonders einfach aufgebaute und funktionssichere Annäherungsschalter werden auf der Basis von Schwingkreisen erhalten, die durch das sich nähernde Fahrzeug verstimmt werden und die Zündung der Mine auslösen. Solche auf der Basis von elektrischen Schwingkreisen beruhende Annäherungsschalter können jedoch nicht zum Zünden von Hohlladungen eingesetzt werden, weil der der Sprengladung zielseitig vorgelagerte, metallische Hohlkörper eine zu starke Dämpfung des Schwingkreises aufgrund der im Hohlkörper induzierten Wirbelströme bewirkt.In the case of mines for combating land vehicles, it is known to provide proximity switches for detonating the explosive charge, these proximity switches being controlled by sound waves or changes in a magnetic field. Proximity switches with a particularly simple design and reliable function are obtained on the basis of resonant circuits that are detuned by the approaching vehicle and trigger the mine to ignite. Such proximity switches based on electrical resonant circuits cannot, however, be used to ignite shaped charges because the metallic hollow body in front of the explosive charge causes excessive damping of the resonant circuit due to the eddy currents induced in the hollow body.

Der Erfindung liegt somit die Aufgabe zugrunde, diesen Mangel zu vermeiden und einen Annäherungsschalter zum Zünden einer Hohlladung auf der Basis eines elektrischen Schwingkreises zu schaffen, dessen Ansprechempfindlichkeit nicht durch den metallischen Hohlkörper der Hohlladung beeinträchtigt wird.The invention is therefore based on the object to avoid this deficiency and to provide a proximity switch for igniting a shaped charge on the basis of an electrical resonant circuit, the responsiveness of which is not impaired by the hollow metal body of the shaped charge.

Die Erfindung löst die gestellte Aufgabe dadurch, daß die dem metallischen Hohlkörper der Hohlladung zielseitig vorgelagerte, mit einer elektrostatischen Schirmung ver sehene Zylinderspule des Schwingkreises auf ihrer vom Ziel abgewandten Seite mit einem koaxialen Ferritring verschiebefest und elektrisch isoliert verbunden ist.The invention solves the stated problem in that the upstream of the metallic hollow body of the shaped charge, with an electrostatic shield ver seen solenoid of the resonant circuit on its side facing away from the target with a coaxial ferrite ring is connected and electrically insulated.

Durch das Vorsehen eines der Zylinderspule des Schwingkreises zugeordneten, koaxialen Ferritringes auf der dem Ziel abgekehrten Spulenseite durchsetzen die Feldlinien des durch die Zylinderspule erregten elektromagnetischen Feldes aufgrund des gegenüber Luft wesentlich geringeren magnetischen Widerstandes des Ferritringes den Ferritring im wesentlichen radial, so daß eine störende Feldausbreitung in den Bereich des metallischen Hohlkörpers der Hohlladung unterbunden wird. Es werden daher keine Wirbelströme im metallischen Hohlkörper der Hohlladung induziert werden.By providing a coaxial ferrite ring assigned to the cylindrical coil of the resonant circuit on the side of the coil remote from the target, the field lines of the electromagnetic field excited by the cylindrical coil penetrate the ferrite ring essentially radially due to the magnetic resistance of the ferrite ring, which is substantially lower than air, so that a disturbing field propagation in the area of the metallic hollow body of the shaped charge is prevented. Therefore, no eddy currents will be induced in the hollow metal body of the shaped charge.

Da der Ferritring aus einem Werkstoff hoher Permeabilität und eines vergleichsweise großen spezifischen Ohmschen Widerstandes hergestellt werden kann, können die durch das Spulenfeld im Ferritkern induzierten Wirbelströme auf ein zulässiges Maß herabgesetzt werden, ohne die Funktionsfähigkeit des Annäherungsschalters zu gefährden. In diesem Zusammenhang ist ja zu berücksichtigen, daß der Annäherungsschalter erst bei einem vergleichsweise geringen Abstand des Zieles von der Hohlladung ansprechen soll und eine entsprechende Ausbreitung des Spulenfeldes in Richtung des Zieles durch den Ferritring auf der dem Ziel abgewandten Spulenseite nicht verhindert werden kann. Um die Funktionssicherheit eines solchen Annäherungsschalters zu gewährleisten, muß allerdings dafür gesorgt werden, daß der Ferritring verschiebefest mit der Zylinderspule des Schwingkreises verbunden ist, damit nicht Relativbewegungen zwischen der Zylinderspule und dem Ferritkern zu einer unter Umständen ein Ansprechen des Annäherungsschalters bewirkenden Verstimmung des Schwingkreises führen können. Dem gleichen Zweck dient die elektrostatische Schirmung der Zylinderspule des Schwingkreises, so daß kapazitive Störeinflüsse ausgeschaltet werden können. Thermische Einflüsse, wie z. B. eine Temperaturdrift, sind dabei durch die an die Schaltung angeschlossene Elektronik kompensierbar.Since the ferrite ring can be produced from a material of high permeability and a comparatively large specific ohmic resistance, the eddy currents induced by the coil field in the ferrite core can be reduced to an allowable level without endangering the functionality of the proximity switch. In this context, it must be taken into account that the proximity switch should only respond when the target is at a comparatively small distance from the shaped charge, and a corresponding spreading of the coil field in the direction of the target by the ferrite ring on the side of the coil remote from the target cannot be prevented. In order to ensure the functional reliability of such a proximity switch, however, care must be taken to ensure that the ferrite ring is connected to the solenoid of the resonant circuit so as not to be displaced, so that relative movements between the solenoid and the ferrite core cannot lead to a detuning of the resonant circuit which may cause the proximity switch to respond . The electrostatic shielding of the cylindrical coil of the resonant circuit serves the same purpose, so that capacitive interference can be eliminated. Thermal influences, such as B. a temperature drift, can be compensated by the electronics connected to the circuit.

Der Ferritring kann in verschiedener Art und Weise mit der Zylinderspule des Schwingkreises verbunden werden, da es lediglich auf eine veschiebefest Zuordnung des Ferritringes zur Zylinderspule ankommt. Besonders vorteilhafte Konstruktionsverhältnisse werden allerdings dadurch sichergestellt, daß der Ferritring mit der Zylinderspule des Schwingkreises durch eine elektrisch isolierende Klebeschicht verbunden wird. Diese Klebeschnicht macht nicht nur andere gegebenenfalls die Ausbildung des Spulenfeldes beeinflussende Verbindungsmittel überflüssig, sondern ergibt auch eine wirksame elektrische Isolierung zwischen der Zylinderspule bzw. ihrer elektrostatischen Schirmung und dem Ferritring.The ferrite ring can be connected to the cylindrical coil of the resonant circuit in various ways, since it is only a matter of a displacement-resistant assignment of the ferrite ring to the cylindrical coil. Particularly advantageous design conditions are ensured, however, in that the ferrite ring is connected to the cylindrical coil of the resonant circuit by an electrically insulating adhesive layer. This adhesive not only makes other connecting means which may influence the formation of the coil field superfluous, but also provides effective electrical insulation between the solenoid or its electrostatic shielding and the ferrite ring.

Zur Halterung der Zylinderspule des Schwingkreises und des mit der Zylinderspule verbundenen Ferritringes kann in weiterer in einer elektrisch isolierenden Vergußmasse eingebettet sein, wobei die Zylinderspule mit dem Ferritring zunächst in ein Kunststoffgehäuse eingesetzt werden kann, das dann mit der Vergußmasse ausgefüllt wird, die vorzugsweise aus einem dauerelastischen Werkstoff gebildet wird.To hold the solenoid of the resonant circuit and the ferrite ring connected to the solenoid can be embedded in an electrically insulating potting compound, the solenoid with the ferrite ring can first be inserted into a plastic housing, which is then filled with the potting compound, which preferably consists of a permanently elastic material is formed.

In der Zeichnung ist der Erfindungsgegenstand beispielsweise dargestellt. Es zeigen

  • Fig. 1 eine Hohlladung mit einer Zylinderspule eines erfindungsgemäßen Annäherungsschalters in einem schematischen Axialschnitt und
  • Fig. 2 den Querschnitt der Zylinderspule des Schwingkreises des Annäherungsschalters in einem größeren Maßstab.
The subject matter of the invention is shown in the drawing, for example. Show it
  • Fig. 1 is a shaped charge with a solenoid of a proximity switch according to the invention in a schematic axial section and
  • Fig. 2 shows the cross section of the solenoid of the resonant circuit of the proximity switch on a larger scale.

Gemäß Fig. 1 besteht die dargestellte Hohlladung aus einem Kunststoffgehäuse 1, das mit Sprengstoff 2 gefüllt ist und zielseitig durch einen metallischen Hohlkörper 3 üblicherweise in Form eines Hohlkegels abgeschlossen ist. Das Gehäuse 1 bildet dabei eine ringförmige Aufnahme 4 für die Zylinderspule 5 eines nicht näher dargestellten Schwingkreises eines Annäherungsschalters zum Zünden der Hohlladung. Diese Zylinderspule 5 ist mit einer elektrostatischen Schirmung 6 versehen und auf ihrer vom Ziel abgewandten Seite mit einem koaxialen Ferritring 7 veschiebefest verbunden. Zur Verbindung des Ferritringes 7 und der Zylinderspule 5 dient eine Klebeschicht 8, die zugleich eine elektrische Isolierung zwischen dem Ferritring 7 und der elektrostatischen Schirmung 6 bzw. der Zylinderspule 5 ergibt. Die mit dem Ferritring 7 verbundene Zylinderspule 5 des Annäherungsschalters ist innerhalb der ringförmigen Aufnahme 4 des Kunststoffgehäuses 1 in eine dauerelastische Vergußmasse 9 eingebettet, was eine gute Halterung der Zylinderspule 5 mit dem Ferritring 7 sicherstellt.1, the shaped charge shown consists of a plastic housing 1, which is filled with explosive 2 and is terminated on the target side by a metallic hollow body 3, usually in the form of a hollow cone. The housing 1 forms an annular receptacle 4 for the solenoid 5 of a resonant circuit, not shown, of a proximity switch for igniting the shaped charge. This solenoid 5 is provided with an electrostatic shield 6 and connected on its side facing away from the target with a coaxial ferrite ring 7 fixed against displacement. An adhesive layer 8 is used to connect the ferrite ring 7 and the solenoid 5, which at the same time provides electrical insulation between the ferrite ring 7 and the electrostatic shield 6 or the solenoid 5. The connected to the ferrite ring 7 Cylinder coil 5 of the proximity switch is embedded within the annular receptacle 4 of the plastic housing 1 in a permanently elastic potting compound 9, which ensures that the cylinder coil 5 is held well with the ferrite ring 7.

Da der Ferritring 7 einen gegenüber Luft sehr kleinen magnetischen Widerstand aufweist, schließen sich die Feldlinien des durch die Zylinderspule 5 des Schwingkreises erregten elektromagnetischen Feldes über diesen Ferritring 7, so daß der metallische Hohlkörper 3 der Hohlladung in einem im wesentlichen feldfreien Raum liegt. In dem metallischen Hohlkörper 3 können daher keine den Schwingkreis in unzulässiger Weise dämpfenden Wirbelströme induziert werden. Die Induktion von Wirbelströmen im Ferritring 7 kann ohne Schwierigkeiten auf einen zulässigen Wert begrenzt werden, weil der Werkstoff für den Ferritring 7 eine hohe Permeabilität und einen vergleichsweise großen spezifischen Ohmschen Widerstand aufweisen kann, der die Induktion größerer Wirbelströme unterbindet und damit die Bedämpfung des Schwingkreises in einem vertretbaren Bereich hält. Trotz des Ferritringes 7 auf der dem Ziel abgekehrten Seite der Zylinderspule 6 kann sich somit ein ausreichend großes Spulenfeld in Richtung des Zieles ausbilden, das bei einer Zielannäherung durch das Ziel verändert wird, so daß die damit verbundene Verstimmung des Schwingkreises des Annäherungsschalters zum Zünden der Hohlladung ausgenützt werden kann.Since the ferrite ring 7 has a very small magnetic resistance to air, the field lines of the electromagnetic field excited by the solenoid 5 of the resonant circuit close via this ferrite ring 7, so that the metallic hollow body 3 of the shaped charge lies in an essentially field-free space. In the metallic hollow body 3, therefore, no eddy currents which dampen the resonant circuit in an impermissible manner can be induced. The induction of eddy currents in the ferrite ring 7 can be limited to an admissible value without difficulty because the material for the ferrite ring 7 can have a high permeability and a comparatively large specific ohmic resistance, which prevents the induction of larger eddy currents and thus the damping of the resonant circuit in an acceptable area. Despite the ferrite ring 7 on the side of the solenoid 6 facing away from the target, a sufficiently large coil field can thus form in the direction of the target, which is changed by the target when the target approaches, so that the associated detuning of the resonant circuit of the proximity switch for igniting the shaped charge can be exploited.

Obwohl sich erfindungsgemäße Annäherungsschalter mit besonderem Vorteil bei Hohlladungen für Minen einsetzen lassen, ist die Erfindung selbstverständlich nicht auf diesen Anwendungsfall beschränkt. Mit Hohlladungen versehene Flugkörper, Granaten und Geschoße können ebenfalls mit solchen Annäherungsschaltern versehen werden, wenn es gilt, die Hohlladung in einem bestimmten Abstand vom Ziel zu zünden.Although proximity switches according to the invention can be used with particular advantage in the case of shaped charges for mines, the invention is of course not restricted to this application. Missiles, grenades and projectiles with shaped charges can also be provided with such proximity switches if the shaped charge needs to be detonated at a certain distance from the target.

Claims (3)

1. A proximity switch for firing a hollow charge, particularly for a mine, comprising an electric resonant circuit having a cylindrical coil, characterized in that the cylindrical coil (5) of the resonant circuit is disposed between the metallic hollow body (3) of the hollow charge and the target and is provided with electrostatic shielding means (6) and on that side which is remote from the target is nondisplace- ably connected to and electrically insulated from a coaxial ferrite ring (7).
2. A proximity switch according to claim 1, characterized in that the ferrite ring (7) is connected to the cylindrical coil (5) of the resonant circuit by an electrically insulating adhesive layer (8).
3. A proximity switch according to claim 1 or 2, charcaterized in that the cylindrical coil (5) and the ferrite ring (7) are embedded in an electrically insulating sealing compound (9).
EP19870890004 1986-01-28 1987-01-14 Proximity fuze for firing a hollow charge, in particular for a mine Expired EP0235115B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT189/86 1986-01-28
AT18986A AT384298B (en) 1986-01-28 1986-01-28 PROXIMITY SWITCH TO END A HIGH CHARGE, IN PARTICULAR FOR A MINE

Publications (2)

Publication Number Publication Date
EP0235115A1 EP0235115A1 (en) 1987-09-02
EP0235115B1 true EP0235115B1 (en) 1989-10-04

Family

ID=3483840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870890004 Expired EP0235115B1 (en) 1986-01-28 1987-01-14 Proximity fuze for firing a hollow charge, in particular for a mine

Country Status (5)

Country Link
EP (1) EP0235115B1 (en)
AT (1) AT384298B (en)
DE (1) DE3760696D1 (en)
ES (1) ES2011303B3 (en)
GR (1) GR3000196T3 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR864811A (en) * 1939-12-21 1941-05-06 Centre Nat Rech Scient Sound rocket
US3347165A (en) * 1958-10-28 1967-10-17 Cletus A Kessler Flux guide for a magnetic fuze
FR1317270A (en) * 1961-12-26 1963-02-08 Quick-set mine
FR1534655A (en) * 1963-07-22 1968-08-02 Further training in so-called formed charge mines with magnetic firing
US3653351A (en) * 1969-07-16 1972-04-04 Us Navy Magnetic detector
FR2071823A5 (en) * 1969-11-04 1971-09-17 Messerschmitt Boelkow Blohm
FR2086528A5 (en) * 1970-04-01 1971-12-31 Clausin Pierre
FR2358635A1 (en) * 1976-07-15 1978-02-10 Haut Rhin Manufacture Machines PROXIMITY DETECTOR FOR HOLLOW OR SHAPED LOAD EXPLOSIVE PROJECTILES
US4206707A (en) * 1977-11-22 1980-06-10 General Dynamics Corportation Electromagnetic hazard suppression techniques

Also Published As

Publication number Publication date
GR3000196T3 (en) 1990-12-31
AT384298B (en) 1987-10-27
ES2011303B3 (en) 1990-01-01
ATA18986A (en) 1987-03-15
EP0235115A1 (en) 1987-09-02
DE3760696D1 (en) 1989-11-09

Similar Documents

Publication Publication Date Title
DE2304952A1 (en) PYROTECHNICAL DEVICE WITH SECURITY AGAINST UNWANTED DETONATION
CH635673A5 (en) ELECTRICAL TOOL.
DE102005031673A1 (en) Ignition system for detonation has data bus and logic and control circuit over data line for control and monitoring of ignition levels with which detonator is connected over the line for transmission of ignition signal
DE102017116277A1 (en) Ignition coil and method of manufacturing an ignition coil
DE10143055A1 (en) Ignition unit comprises a housing accommodating a spark plug, an ignition coil electrically joined to the spark plug connector section, and a connector element for supplying voltage to the ignition coil
DE3119924A1 (en) ELECTRIC LIGHTER
EP0013835A1 (en) Selectively actuable control circuit for a fusehead igniter assembly and detonators containing said circuit
DE2455903C2 (en) Electric igniter
DE1901271A1 (en) Inductive connection for an electrical ignition system of a powder or explosive charge
DE3338936C2 (en)
EP0584154A1 (en) Antenna assembly
EP0235115B1 (en) Proximity fuze for firing a hollow charge, in particular for a mine
DE1778083A1 (en) Ignition-heat conductor assembly
DE3904271A1 (en) FERRITE CORE COUPLED BLOCK (SLAPPER) DETECTING DEVICE AND METHOD THEREFOR
DE3812958A1 (en) ELECTRIC FUEL
DE4214033A1 (en) ELECTRIC IGNITION ELEMENT WITH TARGET DISCHARGE LINE
DE102004008013B4 (en) ignition coil
EP0142780B1 (en) Electric primer
DE3315186C2 (en) Stand-off detonators for anti-tank projectiles
DE10225384C1 (en) Ignition unit for gas generator of occupant restraint system in vehicle, employs inductive isolation plug sealed and clipped into gas generator housing
DE102014204866A1 (en) Impact sensor with triboelectric effect with zones of different elasticity for a motor vehicle
DE4033478C1 (en) Electrically triggered lighter or igniter - has safety slidable or rotatable sleeve short circuiting electrical connections until application of working system
DE1763635A1 (en) Ignition capsule
DE3223775A1 (en) Ignition chain with a safety device
EP0191903B1 (en) Electric primer or igniter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19880202

17Q First examination report despatched

Effective date: 19890313

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR GB GR IT LI LU NL SE

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3760696

Country of ref document: DE

Date of ref document: 19891109

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO CONS. BREVETTUALE S.R.L.

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3000196

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
EPTA Lu: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19950101

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950103

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19950112

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950116

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950120

Year of fee payment: 9

Ref country code: CH

Payment date: 19950120

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 19950125

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19950126

Year of fee payment: 9

EAL Se: european patent in force in sweden

Ref document number: 87890004.2

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19950131

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19950731

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960114

Ref country code: GB

Effective date: 19960114

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19960115

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960115

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19960131

Ref country code: CH

Effective date: 19960131

Ref country code: BE

Effective date: 19960131

BERE Be: lapsed

Owner name: INTERTECHNIK TECHN. PRODUKTIONEN G.M.B.H.

Effective date: 19960131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19960731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19960801

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960114

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960930

REG Reference to a national code

Ref country code: GR

Ref legal event code: MM2A

Free format text: 3000196

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19960801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19961001

EUG Se: european patent has lapsed

Ref document number: 87890004.2

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990405

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050114