EP0150823B1 - Electric ignitor - Google Patents
Electric ignitor Download PDFInfo
- Publication number
- EP0150823B1 EP0150823B1 EP85100750A EP85100750A EP0150823B1 EP 0150823 B1 EP0150823 B1 EP 0150823B1 EP 85100750 A EP85100750 A EP 85100750A EP 85100750 A EP85100750 A EP 85100750A EP 0150823 B1 EP0150823 B1 EP 0150823B1
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- EP
- European Patent Office
- Prior art keywords
- conductor path
- ignition
- electrode
- conductor
- ignition bridge
- 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
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Classifications
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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
- F42B3/10—Initiators therefor
- F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
- F42B3/188—Safety initiators resistant to premature firing by static electricity or stray currents having radio-frequency filters, e.g. containing ferrite cores or inductances
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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
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
- F42B3/124—Bridge initiators characterised by the configuration or material of the bridge
Definitions
- the invention relates to an electrical ignition element with an electrically insulating carrier body which carries an ignition bridge and two electrodes connected to the ignition bridge, of which at least one electrode consists of a layered conductor track.
- the electrodes mounted in layers on the carrier body are at the same time the connecting elements for connecting discrete components, such as Zener diodes, transistors, resistors or the like.
- the conductor tracks have connection points at which the legs of the electrical components are soldered on.
- further conductor tracks can be attached to the carrier body, which serve as connecting lines and for connecting discrete electrical components.
- an electrical ignition device is known (DE-A-2 840 738), in which both electrodes are designed as surface electrodes which are connected to one another by a narrow conductor strip forming the ignition bridge.
- the surface electrodes are separated from one another by an insulating cutout in the carrier body and are connected to one another exclusively by the ignition bridge.
- the electrodes only have the function of current conductors, be it for the purpose of supplying current to the ignition bridge or for supplying current to the components of an electrical circuit which is attached to the carrier body.
- Protective measures are known for securing ignition elements against unwanted triggering by high-frequency electromagnetic interference signals, see for example GB-A-1 419775.
- series resistors, filter circuits and the like can be connected to the lines leading to the electrodes of the ignition element. are switched to prevent the transmission of the interference voltages to the ignition element.
- series resistors have the disadvantage that they not only dampen the high-frequency interference voltages, but also cause a voltage drop in the DC voltage used for ignition, only the high-frequency interference signals are eliminated by frequency filters, while the DC properties of the ignition circuit remain unchanged.
- the disadvantage of the usual protective circuits, which consist of discrete components, is that line sections lead from the protective circuit to the ignition bridge and that these line sections in turn form receiving antennas that can absorb high-frequency interference voltages. Particularly intensive shielding is therefore required in this area.
- the invention has for its object to provide an electrical ignition element of the type mentioned, which is protected against high-frequency electromagnetic interference with simple means and effectively, without the need for complex shielding measures.
- the conductor track is designed as a high-frequency filter.
- the invention has the advantage that additional discrete components are not required for the implementation of the high-frequency filter and that the high-frequency filter is arranged in the immediate vicinity of the ignition bridge to be protected from high-frequency interference, so that there is no possibility of inducing interference voltages behind or in the high-frequency filter.
- the ignition element can be realized with simple means and at low cost, since only the shape of one electrode or both electrodes can be changed compared to the existing ignition elements.
- the electrode or electrode arrangement designed as a high-frequency filter does not have the function of a printed circuit board, but is an integral part of the electrical contacting of the ignition bridge, the filter components being produced by skillfully changing the connecting conductor tracks.
- the high-frequency filter can either be designed as a band-pass filter or as a high-pass filter, so that the direct current or low-frequency alternating current used for the ignition can pass through the filter undamped.
- the techniques in which conductor tracks are designed as inductors or capacitors are known from thick-film technology.
- the conductor track is designed entirely or in sections as a series inductance with respect to the ignition bridge, areas of the conductor track running at substantially constant distances along non-linear paths, for example by B. the conductor track is spiral.
- the inductance can, for. B. also have the shape of an open loop.
- a series inductance has a filter effect. The voltage drop across it is proportional to the frequency. Their DC resistance is practically zero.
- the conductor track having the series inductance can be designed in sections as a series capacitance with respect to the ignition bridge, in that the conductor track is designed geometrically outside the region of the inductance in such a way that regions arise which are opposite one another at a short distance.
- the separation or interruption of these areas is preferably meandering.
- a parallel resonant circuit can be formed from a series inductance and a series capacitance, which is in series with the ignition bridge.
- the conductor track, together with a conductor track of the other electrode forms a parallel capacitance to the ignition bridge, the two conductor tracks running essentially parallel to one another at a close distance.
- a parallel capacitance has the function of an interference suppression capacitor that short-circuits high-frequency vibrations
- the ignition or ignition means shown in FIG. 1 has a cylindrical metallic jacket 1, which contains a metallic ground contact ring 2 lying against the inner wall of the jacket.
- the end 3 of the ground contact ring 2 is bent inwards to form an inner flange.
- the ground contact ring 2 contains an explosive 4 in the form of an explosive.
- the primer 4 completely fills the ground contact ring 2 and the opening delimited by the bent end 3.
- an insulating body 5 is arranged in the jacket 1, which contains a layer element 6 which is in direct contact with the primer 4.
- the end of the layer element 6 facing away from the primer 4 is in contact with a metallic pole piece 7, likewise enclosed by the insulating housing 5, which protrudes through an opening in the insulating housing 5 and forms the contact to an ignition generator, the jacket 1 connecting the second electrode to the connection represents an ignition generator.
- the layer element 6 consists of a cylindrical insulating carrier body 8 which has a central bore 9.
- the first electrode 10 consists of a conductor track which forms a layer covering the upper end face of the carrier body 8, which is subdivided by an interruption 11 of a spiral shape.
- the interruption 11 forms a spiral strip of several turns, so that the conductor track 10 also has the shape of a spiral, the outer end of which opens into a circle, and the inner end of which runs freely.
- the second electrode 12 consists of an annular conductor track which is electrically connected via a conductor layer 13 covering the wall of the bore 9 to a contact electrode 14 which covers the underside of the carrier body 8.
- the ignition bridge 15 extends radially between the inner end of the spiral-shaped first electrode 10 and the annular second electrode 12 and bridges the annular gap between these two electrodes.
- the ignition resistor 15 is preferably produced using tantalum thin-film technology or applied as a thick-film resistor and is located on a carrier body 8 between the electrodes 10 and 12.
- the outer ring of the electrode 10 is in surface contact with the bent end 3 of the ground contact ring 2, while the contact electrode 14 is in direct contact with the pole piece 7.
- the spiral-shaped first electrode 10 forms an inductance, by means of which high-frequency signals are kept away from the ignition bridge 15. In contrast, the inductance does not influence the DC behavior of the ignition circuit.
- the inductance does not necessarily have to be formed from a spiral conductor track, but it can also have a meandering course, for example.
- the first electrode 10 is ring-shaped, with radial projections 16 pointing inwards from the ring.
- the second electrode 12 has the shape of a round disk with radially outwardly pointing projections 17 which engage in the gaps between the projections 16 of the first electrode 10.
- the two electrodes 10, 12 are separated from one another by a strip-shaped interruption 11 of constant width. As a result, the electrodes form a capacitance.
- the ignition bridge 15 is located in a wider area between the electrodes 10, 12.
- the capacitance formed by the electrodes is electrically connected in parallel with the ignition bridge 15 and thus acts as an interference suppression capacitor.
- the second electrode 12 consists of a ring surrounding the bore 9, while the first electrode or conductor track 10 forms a parallel resonant circuit made of capacitors and inductors connected in parallel.
- the first electrode 10 has two edge regions 18 lying opposite one another and a central region 19 surrounding the second electrode 12 at a distance.
- the central region 19 protrudes into each of the edge regions 18, but is one of each of the edge regions meandering opening 11 of constant width separated. This results in regions 27, 28 in the conductor track, which lie opposite one another at a short distance and form the capacitors.
- the inductors consist of loop-shaped regions 20 which have the shape of open circular rings, one end of which is connected to the edge regions 18 and the other ends of which are connected to the central region 19.
- the circular opening between the central region 19 of the first electrode 10 and the second electrode 12 is bridged by the ignition bridge 15.
- FIGS. 5 and 5a are not, as in the previous exemplary embodiments, stratified primers, but rather a squib, ie a wire primer.
- the first electrode or conductor track 10 has a meandering opening 11 with the regions 29, 30 which are opposite one another at a short distance and form the capacitance.
- an inductor Arranged parallel to the capacitance is an inductor, which consists of a section 25 in the form of an open conductor loop which runs through an otherwise conductor-free region 26 of the insulating material plate 21.
- an LC filter is created, the electrical equivalent circuit of which consists of the parallel connection of an inductance and a capacitance which are in series with the ignition bridge 15.
Abstract
Description
Die Erfindung betrifft ein elektrisches Anzündelement mit einem elektrisch isolierenden Trägerkörper, der eine Zündbrücke und zwei mit der Zündbrücke verbundene Elektroden trägt, von denen mindestens eine Elektrode aus einer schichtförmigen Leiterbahn besteht.The invention relates to an electrical ignition element with an electrically insulating carrier body which carries an ignition bridge and two electrodes connected to the ignition bridge, of which at least one electrode consists of a layered conductor track.
Bei einem bekannten Anzündelement dieser Art (DE-A-2 747 163) sind die auf dem Trägerkörper schichtförmig angebrachten Elektroden zugleich die Verbindungselemente für den Anschluß diskreter Bauteile, wie Zenerdioden, Transistoren, Widerstände o.dgl.. Die Leiterbahnen haben Anschlußpunkte, an denen die Beine der elektrischen Komponenten angelötet werden. Außer den Elektroden können auf dem Trägerkörper noch weitere Leiterbahnen angebracht werden, die als Verbindungsleitungen und zum Anschluß diskreter elektrischer Bauteile dienen.In a known ignition element of this type (DE-A-2 747 163), the electrodes mounted in layers on the carrier body are at the same time the connecting elements for connecting discrete components, such as Zener diodes, transistors, resistors or the like. The conductor tracks have connection points at which the legs of the electrical components are soldered on. In addition to the electrodes, further conductor tracks can be attached to the carrier body, which serve as connecting lines and for connecting discrete electrical components.
Ferner ist eine elektrische Zündvorrichtung bekannt (DE-A-2 840 738), bei der beide Elektroden als Flächenelektroden ausgebildet sind, die durch einen die Zündbrücke bildenden schmalen Leiterstreifen miteinander verbunden sind. Die Flächenelektroden sind durch eine isolierende Aussparung im Trägerkörper voneinander getrennt und ausschließlich durch die Zündbrücke miteinander verbunden.Furthermore, an electrical ignition device is known (DE-A-2 840 738), in which both electrodes are designed as surface electrodes which are connected to one another by a narrow conductor strip forming the ignition bridge. The surface electrodes are separated from one another by an insulating cutout in the carrier body and are connected to one another exclusively by the ignition bridge.
Bei den bekannten Anzündelementen haben die Elektroden jeweils nur die Funktion von Stromleitern, sei es zum Zwecke der Stromzuführung zu der Zündbrücke oder zur Stromzuführung zu den Bauteilen einer elektrischen Schaltung, die auf dem Trägerkörper angebracht ist.In the known ignition elements, the electrodes only have the function of current conductors, be it for the purpose of supplying current to the ignition bridge or for supplying current to the components of an electrical circuit which is attached to the carrier body.
Zur Sicherung von Anzündelementen gegen ungewollte Auslösung durch hochfrequente elektromagnetische Störsignale sind Schutzmaßnahmen bekannt, siehe zum Beispiel GB-A-1 419775. Beispielsweise können in die zu den Elektroden des Anzündelementes führenden Leitungen Vorwiderstände, Filterkreise u.dgl. geschaltet werden, um die Übertragung der Störspannungen zum Anzündelement zu unterbinden. Während Vorwiderstände den Nachteil haben, daß sie nicht nur die hochfrequenten Störspannungen dämpfen, sondern auch bei der zum Zünden benützten Gleichspannung ein Spannungsabfall hervorrufen, werden durch Frequenzfilter nur die hochfrequenten Störsignale eliminiert, während die Gleichstromeigenschaften des Zündkreises unverändert bleiben. Der Nachteil der üblichen Schutzschaltungen, die aus diskreten Bauteilen bestehen, besteht darin, daß Leitungsstücke von der Schutzschaltung bis zur Zündbrücke führen und daß diese Leitungsstücke ihrerseits Empfangsantennen bilden, die hochfrequente Störspannungen aufnehmen können. In diesem Bereich ist daher eine besonders intensive Abschirmung erforderlich.Protective measures are known for securing ignition elements against unwanted triggering by high-frequency electromagnetic interference signals, see for example GB-A-1 419775. For example, series resistors, filter circuits and the like can be connected to the lines leading to the electrodes of the ignition element. are switched to prevent the transmission of the interference voltages to the ignition element. While series resistors have the disadvantage that they not only dampen the high-frequency interference voltages, but also cause a voltage drop in the DC voltage used for ignition, only the high-frequency interference signals are eliminated by frequency filters, while the DC properties of the ignition circuit remain unchanged. The disadvantage of the usual protective circuits, which consist of discrete components, is that line sections lead from the protective circuit to the ignition bridge and that these line sections in turn form receiving antennas that can absorb high-frequency interference voltages. Particularly intensive shielding is therefore required in this area.
Der Erfindung liegt die Aufgabe zugrunde, ein elektrisches Anzündelement der eingangs genannten Art zu schaffen, das gegen hochfrequente elektromagnetische Störungen mit einfachen Mitteln und wirksam geschützt wird, ohne daß es aufwendiger Abschirmungsmaßnahmen bedarf.The invention has for its object to provide an electrical ignition element of the type mentioned, which is protected against high-frequency electromagnetic interference with simple means and effectively, without the need for complex shielding measures.
Die Lösung dieser Aufgabe besteht erfindungsgemäß darin, daß die Leiterbahn als Hochfrequenzfilter ausgebildet ist.The solution to this problem is, according to the invention, that the conductor track is designed as a high-frequency filter.
Die Erfindung bietet den Vorteil, daß zuzätzliche diskrete Bauelemente für die Realisierung des Hochfrequenzfilters nicht erforderlich sind und daß das Hochfrequenzfilter in unmittelbarer Nähe der vor Hochfrequenzstörungen zu schützenden Zündbrücke angeordnet ist, so daß keine Möglichkeit besteht, hinter oder in dem Hochfrequenzfilter noch Störspannungen zu induzieren. Das Anzündelement ist mit einfachen Mitteln und geringen Kosten realisierbar, da gegenüber den bestehenden Anzündelementen lediglich die Form einer Elektrode oder beider Elektroden zu verändern ist. Die als Hochfrequenzfilter ausgebildete Elektrode bzw. Elektrodenanordnung hat nicht die Funktion einer Leiterplatine, sondern ist integrierter Bestandteil der elektrischen Kontaktierung der Zündbrücke, wobei die Filterbauteile durch geschickte Veränderung der Anschlußleiterbahnen erzeugt werden.The invention has the advantage that additional discrete components are not required for the implementation of the high-frequency filter and that the high-frequency filter is arranged in the immediate vicinity of the ignition bridge to be protected from high-frequency interference, so that there is no possibility of inducing interference voltages behind or in the high-frequency filter. The ignition element can be realized with simple means and at low cost, since only the shape of one electrode or both electrodes can be changed compared to the existing ignition elements. The electrode or electrode arrangement designed as a high-frequency filter does not have the function of a printed circuit board, but is an integral part of the electrical contacting of the ignition bridge, the filter components being produced by skillfully changing the connecting conductor tracks.
Das Hochfrequenzfilter kann entweder als Bandpaßfilter oder als Hochpaß ausgebildet sein, so daß der zum Zünden benutzte Gleichstrom oder niederfrequente Wechselstrom das Filter ungedämpft passieren kann. Die Techniken, in denen Leiterbahnen als Induktivität oder Kapazität ausgebildet werden, sind von der Dickschichttechnik her bekannt.The high-frequency filter can either be designed as a band-pass filter or as a high-pass filter, so that the direct current or low-frequency alternating current used for the ignition can pass through the filter undamped. The techniques in which conductor tracks are designed as inductors or capacitors are known from thick-film technology.
Gemäß einer bevorzugten Ausführungsform der Erfindung ist die Leiterbahn ganz oder abschnittsweise als Serieninduktivität bezogen auf die Zündbrücke ausgebildet, wobei Bereiche der Leiterbahn mit im wesentlichen konstantem Abstand entlang ungeradliniger Wege verlaufen, indem z. B. die Leiterbahn spiralförmig ausgebildet ist. Alternativ kann die Induktivität aber z. B. auch die Form einer offenen Schleife haben. Bekanntlich hat eine Serieninduktivität eine Filterwirkung. Der an ihr entstehende Spannungsabfall ist der Frequenz proportional. Ihr Gleichstromwiderstand ist praktisch gleich Null.According to a preferred embodiment of the invention, the conductor track is designed entirely or in sections as a series inductance with respect to the ignition bridge, areas of the conductor track running at substantially constant distances along non-linear paths, for example by B. the conductor track is spiral. Alternatively, the inductance can, for. B. also have the shape of an open loop. As is well known, a series inductance has a filter effect. The voltage drop across it is proportional to the frequency. Their DC resistance is practically zero.
Zusätzlich kann die die Serieninduktivität aufweisende Leiterbahn abschnittsweise als Serienkapazität bezogen auf die Zündbrücke ausgebildet sein, indem die Leiterbahn außerhalb des Bereiches der Induktivität geometrisch so ausgebildet ist, daß Bereiche entstehen, die sich mit geringem Abstand gegenüberliegen. Die Trennung oder Unterbrechung dieser Bereiche ist bevorzugt mäanderförmig ausgebildet. Auf diese Weise kann aus einer Serieninduktivität und einer Serienkapazität ein Parallelschwingkreis gebildet werden, der in Serie zur Zündbrücke liegt.In addition, the conductor track having the series inductance can be designed in sections as a series capacitance with respect to the ignition bridge, in that the conductor track is designed geometrically outside the region of the inductance in such a way that regions arise which are opposite one another at a short distance. The separation or interruption of these areas is preferably meandering. In this way, a parallel resonant circuit can be formed from a series inductance and a series capacitance, which is in series with the ignition bridge.
Gemäß einer weiteren bevorzugten Ausführungsform der Erfindung ist vorgesehen, daß die Leiterbahn zusammen mit einer Leiterbahn der anderen Elektrode eine Parallelkapazität zur Zündbrücke bildet, wobei beide Leiterbahnen mit engem Abstand im wesentlichen parallel zueinander verlaufen. Eine solche Parallelkapazität hat die Funktion eines Entstörkondensators, der hochfrequente Schwingungen kurzschließtAccording to a further preferred embodiment of the invention, that the conductor track, together with a conductor track of the other electrode, forms a parallel capacitance to the ignition bridge, the two conductor tracks running essentially parallel to one another at a close distance. Such a parallel capacitance has the function of an interference suppression capacitor that short-circuits high-frequency vibrations
Im folgenden werden unter Bezugnahme auf die Zeichnungen Ausführungsbeispiele der Erfindung näher erläutert.Exemplary embodiments of the invention are explained in more detail below with reference to the drawings.
Es zeigen:
- Fig. 1 einen Längsschnitt durch ein als Schichtzündmittel bezeichnetes Anzündelement,
- Fign. 2 und 2a eine Draufsicht und einen Längsschnitt durch das in dem Schichtzündmittel der Fig. 1 enthaltend Schichtelement,
- Fig. 3 eine Draufsicht auf eine andere Ausführungsform des Schichtelementes,
- Fig. 3a einen Schnitt entlang der Linie a - a der Fig. 3,
- Fig. 4 eine Draufsicht eines dritten Schichtelementes,
- Fig. 4a einen Schnitt entlang der Linie a - a der Fig. 4,
- Fig. 5 eine weitere Ausführungsform, teilweise geschnitten, und
- Fig. 5a einen Schnitt entlang der Linie a - a der Fig. 5.
- 1 shows a longitudinal section through an ignition element referred to as a stratified ignition device,
- Fig. 2 and 2a show a top view and a longitudinal section through the layer element containing the stratified ignition device of FIG. 1,
- 3 shows a plan view of another embodiment of the layer element,
- 3a shows a section along the line a - a of Fig. 3,
- 4 shows a plan view of a third layer element,
- 4a shows a section along the line a - a of FIG. 4,
- Fig. 5 shows another embodiment, partially in section, and
- 5a shows a section along the line a - a of FIG. 5th
Das in Fig. 1 dargestellte Zünd- bzw. Anzündmittel weist einen zylindrischen metallischen Mantel 1 auf, der einen an der Innenwand des Mantels anliegenden metallischen Massekontaktring 2 enthält. Das Ende 3 des Massekontaktringes 2 ist zur Bildung eines Innenflansches nach innen abgebogen. Der Massekontaktring 2 enthält einen Zündstoff 4 in Form eines Sprengmittels. Der Zündstoff 4 füllt den Massekontaktring 2 und die von dem umgebogenen Ende 3 begrenzte Öffnung voll aus.The ignition or ignition means shown in FIG. 1 has a cylindrical
In Anschluß an den Massekontaktring 2 ist in dem Mantel 1 ein Isolierkörper 5 angeordnet, der ein in direktem Kontakt mit dem Zündstoff 4 stehendes Schichtelement 6 enthält. Das dem Zündstoff 4 abgewandte Ende des Schichtelementes 6 ist in Kontakt mit einem ebenfalls von dem Isoliergehäuse 5 umschlossenen metallischen Polstück 7, das durch eine Öffnung des Isoliergehäuses 5 hindurchragt und die Kontaktierung zu einem Zündgenerator bildet, wobei der Mantel 1 die zweite Elektrode zum Anschluß an einen Zündgenerator darstellt. Bei Anlegen einer Spannung zwischen Massekontaktring 2 und Polstück 7 erfolgt durch das Schichtelement 6 das Zünden des Zündstoffs 4.In connection with the
Das Schichtelement 6 besteht gemäß Fig. 2 aus einem zylindrischen isolierenden Trägerkörper 8, der eine Mittelbohrung 9 aufweist. Die erste Elektrode 10 besteht aus einer Leiterbahn, die eine die obere Stirnseite des Trägerkörpers 8 bedeckende Schicht bildet, welche durch eine Unterbrechung 11 von spiralförmigem Verlauf unterteilt ist. Die Unterbrechung 11 bildet einen spiralförmigen Streifen von mehreren Windungen, so daß auch die Leiterbahn 10 die Form einer Spirale hat, deren äußeres Ende in einen Kreis mündet, und deren inneres Ende frei ausläuft.According to FIG. 2, the
Die zweite Elektrode 12 besteht aus einer ringförmigen Leiterbahn, die über eine die Wand der Bohrung 9 bedeckende Leiterschicht 13 mit einer Kontaktelektrode 14, die die Unterseite des Trägerkörpers 8 bedeckt, elektrisch verbunden ist.The
Die Zündbrücke 15 erstreckt sich radial zwischen dem inneren Ende der spiralförmigen ersten Elektrode 10 und der ringförmigen zweiten Elektrode 12 und sie überbrückt den Ringspalt zwischen diesen beiden Elektroden. Der Zündwiderstand 15 ist vorzugsweise in Tantaldünnfilmtechnologie hergestellt, oder als Dickschichtwiderstand aufgebracht und befindet sich auf einem Trägerkörper 8 zwischen den Elektroden 10 und 12.The
Der äußere Ring der Elektrode 10 steht in Flächenkontakt mit dem umgebogenen Ende 3 des Massekontaktrings 2, während die Kontaktelektrode 14 in direktem Kontakt mit dem Polstück 7 steht. Die spiralförmige erste Elektrode 10 bildet eine Induktivität, durch die hochfrequente Signale von der Zündbrücke 15 ferngehalten werden. Die Induktivität beeinflußt dagegen nicht das Gleichstromverhalten des Zündkreises. Die Induktivität muß nicht notwendigerweise aus einer spiralförmigen Leiterbahn gebildet werden, sondern sie kann beispielsweise auch mäanderförmigen Verlauf haben.The outer ring of the
Bei dem Ausführungsbeispiel der Fig. 3 ist die erste Elektrode 10 ringförmig ausgebildet, wobei von dem Ring radiale Vorsprünge 16 nach innen weisen. Die zweite Elektrode 12 hat die Form einer runden Scheibe mit radial nach außen weisenden Vorsprüngen 17, die in die Lücken zwischen den Vorsprüngen 16 der ersten Elektrode 10 greifen. Die beiden Elektroden 10, 12 sind durch eine streifenförmige Unterbrechung 11 konstanter Breite voneinander getrennt. Dadurch bilden die Elektroden eine Kapazität. In einem breiteren Bereich zwischen den Elektroden 10, 12 befindet sich die Zündbrücke 15. Die von den Elektroden gebildete Kapazität ist der Zündbrücke 15 elektrisch parallelgeschaltet und wirkt somit als Entstörkondensator.In the embodiment of FIG. 3, the
Bei dem Ausführungsbeispiel der Fign. 4 und 4a besteht die zweite Elektrode 12 aus einem die Bohrung 9 umgebenden Ring, während die erste Elektrode oder Leiterbahn 10 einen Parallelschwingkreis aus parallelgeschalteten Kapazitäten und Induktivitäten bildet. Die erste Elektrode 10 weist zwei einander gegenüberliegende Randbereiche 18 und einen die zweite Elektrode 12 mit Abstand umgebenden Mittelbereich 19 auf. Der Mittelbereich 19 ragt in jeden der Randbereiche 18 hinein, ist aber von den Randbereichen durch jeweils eine mäanderförmige Durchbrechung 11 von konstanter Breite getrennt. Dadurch entstehen in der Leiterbahn 10 Bereiche 27, 28, die sich mit geringem Abstand gegenüberliegen und die Kapazitäten bilden. Die Induktivitäten bestehen aus schleifenförmigen Bereichen 20, die die Form offener Kreisringe haben, deren eine Enden mit den Randbereichen 18 und deren andere Enden mit dem Mittelbereich 19 verbunden sind. Die kreisförmige Durchbrechung zwischen dem mittleren Bereich 19 der ersten Elektrode 10 und der zweiten Elektrode 12 ist durch die Zündbrücke 15 überbrückt.In the embodiment of FIGS. 4 and 4a, the
Bei dem Ausführungsbeispiel der Fign. 5 und 5a handelt es sich nicht, wie bei den vorherigen Ausführungsbeispielen, um Schichtzündmittel, sondern um eine Zündpille, also ein Drahtzündmittel. Als Trägerkörper dient hierbei eine Isolierstoffplatte 21, die auf beiden Seiten eine Leiterkaschierung aufweist. Die vordere Kaschierung bildet die erste Elektrode 10 und die rückwärtige Kaschierung die zweite Elektrode 12. Beide Elektroden 10,12 sind durch eine aus einem Brückendraht bestehende Zundbrücke 15 miteinander verbunden. Das Ende der lsolierstoffplatte 21 befindet sich im Innern eines lsolierstoffkörpers 22, der auch die Enden der Zuleitungsdrähte 23 enthält. Diese Enden sind durch Lötstellen 24 mit der jeweiligen Elektrode 10 bzw. 12 verbunden.In the embodiment of FIGS. 5 and 5a are not, as in the previous exemplary embodiments, stratified primers, but rather a squib, ie a wire primer. An insulating
Die erste Elektrode oder Leiterbahn 10 weist eine mäanderförmige Durchbrechung 11 mit den sich im geringen Abstand gegenüberliegenden Bereichen 29, 30 auf, welche die Kapazität bilden. Parallel zu der Kapazität ist eine Induktivität angeordnet, die aus einem Abschnitt 25 in Form einer offenen Leiterschleife besteht, welche durch einen im übrigen leiterfreien Bereich 26 der Isolierstoffplatte 21 verläuft. Auf diese Weise entsteht ein LC-Filter, dessen elektrische Ersatzschaltung aus der Parallelschaltung einer Induktivität und einer Kapazität besteht, die mit der Zündbrücke 15 in Reihe liegen.The first electrode or
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT85100750T ATE39758T1 (en) | 1984-01-31 | 1985-01-25 | ELECTRIC LIGHTING ELEMENT. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3403179 | 1984-01-31 | ||
| DE3403179 | 1984-01-31 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0150823A2 EP0150823A2 (en) | 1985-08-07 |
| EP0150823A3 EP0150823A3 (en) | 1986-07-23 |
| EP0150823B1 true EP0150823B1 (en) | 1989-01-04 |
Family
ID=6226302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85100750A Expired EP0150823B1 (en) | 1984-01-31 | 1985-01-25 | Electric ignitor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4690056A (en) |
| EP (1) | EP0150823B1 (en) |
| AT (1) | ATE39758T1 (en) |
| CA (1) | CA1254611A (en) |
| DE (1) | DE3567268D1 (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL82508A (en) * | 1987-05-13 | 1991-06-10 | Israel Defence | Electric igniter assembly |
| IL85527A (en) * | 1988-02-24 | 1991-05-12 | Israel Defence | Electric igniter assembly |
| DE3812958A1 (en) * | 1988-04-19 | 1989-11-02 | Diehl Gmbh & Co | ELECTRIC FUEL |
| US5113764A (en) * | 1989-09-25 | 1992-05-19 | Olin Corporation | Semiconductor bridge (SCB) packaging system |
| US5029529A (en) * | 1989-09-25 | 1991-07-09 | Olin Corporation | Semiconductor bridge (SCB) packaging system |
| EP0758735A3 (en) * | 1995-08-14 | 1998-01-07 | ICI Americas Inc | Pyrotechnic initiator and process of making same |
| US5847309A (en) * | 1995-08-24 | 1998-12-08 | Auburn University | Radio frequency and electrostatic discharge insensitive electro-explosive devices having non-linear resistances |
| US6662727B2 (en) | 1996-03-14 | 2003-12-16 | Dynamit Nobel Gmbh | Gas generator, in particular for belt tighteners |
| GB2315118A (en) * | 1996-07-11 | 1998-01-21 | Ici Plc | Electro-explosvie device |
| FR2760525B1 (en) * | 1997-03-07 | 1999-04-16 | Livbag Snc | ELECTRO-PYROTECHNIC INITIATOR BUILT AROUND A FULL PRINTED CIRCUIT |
| US6553911B1 (en) * | 1997-04-30 | 2003-04-29 | Erico International Corporation | Exothermic reactions and methods |
| US6105503A (en) * | 1998-03-16 | 2000-08-22 | Auburn University | Electro-explosive device with shaped primary charge |
| WO2000017600A1 (en) * | 1998-09-22 | 2000-03-30 | Eg & G, Inc. | Improved chip slapper detonator |
| FR2784176B1 (en) | 1998-10-06 | 2004-11-26 | Livbag Snc | ELECTRO-PYROTECHNIC INITIATION SYSTEM PROTECTED AGAINST ELECTROSTATIC DISCHARGES |
| FR2790078B1 (en) | 1999-02-18 | 2004-11-26 | Livbag Snc | ELECTROPYROTECHNIC IGNITER WITH ENHANCED IGNITION SAFETY |
| US6772692B2 (en) | 2000-05-24 | 2004-08-10 | Lifesparc, Inc. | Electro-explosive device with laminate bridge |
| KR20040090987A (en) | 2002-01-25 | 2004-10-27 | 에리코 인터내셔날 코포레이션 | Welding apparatus and method |
| WO2015018828A1 (en) * | 2013-08-05 | 2015-02-12 | Ruag Ammotec Gmbh | Electrical igniting cap for small caliber munition |
| US9500448B1 (en) * | 2015-06-09 | 2016-11-22 | Reynolds Systems, Inc. | Bursting switch |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA581316A (en) * | 1959-08-11 | Canadian Industries Limited | Blasting caps with printed circuit bridge | |
| US2818020A (en) * | 1955-11-17 | 1957-12-31 | Glenn A Burklund | Safeguarded electric firing initiating devices |
| US3804018A (en) * | 1970-06-04 | 1974-04-16 | Ici America Inc | Initiator and blasting cap |
| GB1419775A (en) * | 1972-10-05 | 1975-12-31 | Secr Defence | Electrical initiators |
| DE2747163A1 (en) * | 1977-10-20 | 1979-04-26 | Dynamit Nobel Ag | ELECTRICAL ELEMENT |
| CH643056A5 (en) * | 1978-08-10 | 1984-05-15 | Inventa Ag | ELECTRIC IGNITION DEVICE. |
| FR2513751B1 (en) * | 1981-09-28 | 1986-04-11 | France Etat | ELECTRIC PYROTECHNIC INITIATOR WITH JOUL EFFECT |
-
1985
- 1985-01-25 AT AT85100750T patent/ATE39758T1/en not_active IP Right Cessation
- 1985-01-25 DE DE8585100750T patent/DE3567268D1/en not_active Expired
- 1985-01-25 EP EP85100750A patent/EP0150823B1/en not_active Expired
- 1985-01-30 CA CA000473195A patent/CA1254611A/en not_active Expired
- 1985-01-31 US US06/696,905 patent/US4690056A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0150823A3 (en) | 1986-07-23 |
| US4690056A (en) | 1987-09-01 |
| DE3567268D1 (en) | 1989-02-09 |
| CA1254611A (en) | 1989-05-23 |
| EP0150823A2 (en) | 1985-08-07 |
| ATE39758T1 (en) | 1989-01-15 |
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