EP0378963A1 - Spark gap element for shielded mounting - Google Patents

Spark gap element for shielded mounting Download PDF

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Publication number
EP0378963A1
EP0378963A1 EP89730009A EP89730009A EP0378963A1 EP 0378963 A1 EP0378963 A1 EP 0378963A1 EP 89730009 A EP89730009 A EP 89730009A EP 89730009 A EP89730009 A EP 89730009A EP 0378963 A1 EP0378963 A1 EP 0378963A1
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EP
European Patent Office
Prior art keywords
electrode
spark gap
control electrode
gap component
potential
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89730009A
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German (de)
French (fr)
Other versions
EP0378963B1 (en
Inventor
Jürgen Dipl.-Ing. Boy
Matthias Dipl.-Ing. Jacubeit
Tetsuo Dipl.-Ing. Fukumoto
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Siemens AG
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP89730009A priority Critical patent/EP0378963B1/en
Priority to DE58907951T priority patent/DE58907951D1/en
Priority to JP2006980A priority patent/JP2911156B2/en
Priority to US07/467,031 priority patent/US5142194A/en
Publication of EP0378963A1 publication Critical patent/EP0378963A1/en
Application granted granted Critical
Publication of EP0378963B1 publication Critical patent/EP0378963B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/20—Means for starting arc or facilitating ignition of spark gap
    • H01T1/22—Means for starting arc or facilitating ignition of spark gap by the shape or the composition of the electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/46—Sparking plugs having two or more spark gaps
    • H01T13/462—Sparking plugs having two or more spark gaps in series connection
    • H01T13/465—Sparking plugs having two or more spark gaps in series connection one spark gap being incorporated in the sparking plug

Definitions

  • the invention is in the field of electrical components and can be used in the structural design of a spark gap component which, during operation, is arranged within a shield which surrounds the spark gap component with the interposition of a solid dielectric.
  • spark gap components are used in particular in motor vehicles as spark gaps for spark plugs.
  • a known spark gap component consists of a tubular insulator and two electrodes, one electrode being inserted in a vacuum-tight manner in one end and the other electrode in the other end of the insulator. In operation, one electrode carries the potential, while the other electrode has potential close to the earth.
  • the two electrodes also have an essentially planar active surface, these surfaces being provided with a layer made of a material which is resistant to erosion.
  • This known spark gap component is intended for installation in a spark plug connector. In the installed state, the component is in the through hole of an insulating body, which is encased by a metal shield.
  • the ignition voltage of the spark gap component is approximately 8 to 10 kV (DE-B-24 18 261).
  • spark gap components are also designed for higher ignition voltages.
  • the active parts of the electrodes consist of titanium, zirconium and similar metals and the component is filled with an inert gas at a pressure of 0.8 to 10 bar (US C-3 956 657).
  • an inert gas at a pressure of 0.8 to 10 bar (US C-3 956 657).
  • an ignition aid to the inner wall of the insulator in the region of the discharge gap, the sum of the distances of the ignition aid from the rounded or chamfered electrode edges being greater than about 0.5 mm distance between electrodes.
  • the component referred to as the spark gap is essentially filled with nitrogen at a pressure of approximately 15 bar (EP-C-0 099 522).
  • the invention is therefore based on the object of designing the spark gap component in such a way that the ignition voltage is essentially independent of subsequent shielding of the component, in particular such that the ignition voltage is in the unshielded state of the ignition voltage in the shielded state is not significantly undercut.
  • an annular control electrode is arranged on or on the outer lateral surface of the insulator at the level of the active surface of the potential-carrying electrode, said control electrode being electrically connected to the potential-carrying electrode.
  • the invention takes into account the knowledge that, at increasingly higher ignition voltages, the electrical field between the two electrodes of the spark gap component is influenced by a surrounding shield such that an increase in the field strength at the circumferential edge of the active surface of the potential-carrying electrode occurs. This lowers the ignition voltage.
  • the electric field is influenced in such a way that there are no significant differences in the area of interest in the shielded or unshielded state of the spark gap component.
  • the effectiveness of the potential control according to the invention depends, among other things. from the distance that the shield connects the spark gap device, and i.e. in particular surrounds the electrodes, and furthermore the extent to which the control electrode or the effective edge of the control electrode is removed from the active surface of the potential-carrying electrode in the axial direction of the spark gap component.
  • the control electrode is expediently of metallic design and can consist, for example, of a galvanically applied metallization or a coated conductive silver layer.
  • control electrode only on the potential-carrying electrode is particularly useful when the shield is firmly at ground potential. If the shielding potential is floating, it is necessary to assign a control electrode to both electrodes. However, this is also possible when the shield is grounded.
  • spark gap component 1 which essentially consists of the tubular glass or ceramic insulator 2 and the two electrodes 3 and 4, the electrodes having active surfaces 5 and 6, respectively.
  • the active surfaces are at a distance A of about 6 mm from one another.
  • a cylindrical control electrode 7 is electrically connected to the electrode 3 and extends from the foot part 9 of the electrode 3 along the outer circumferential surface of the insulator 2 in the direction of the counter electrode 4 to the height of the active surface 5 of the electrode 3.
  • the control electrode ends at a height distance a from the active surface of the electrode 3. This distance a is less than 10% of the distance A and is approximately 0.5 mm.
  • the control electrode 7 consists of an applied metallization of a metal-silicate mixture.
  • the electrode 3 is the potential-carrying electrode and the electrode 4 is direct or connected to the shield via a resistor.
  • An exemplary embodiment of this is shown in FIG. 3, the spark gap component 1 being surrounded by a solid dielectric 21 and the shield 20 and the electrode 4 being electrically connected to the shield 20.
  • FIG. 2 shows a spark gap component 11 within a shield 20, the space between the shield 20 and the component 11 being filled with a solid dielectric 21.
  • the solid dielectric 21 is in particular an insulating plastic, for example a shrink tube.
  • the spark gap component 11 consists of the tubular insulator 12, in which the two electrodes 13 and 14 are inserted.
  • the active surfaces 15 and 16 of the two electrodes have a distance A as in FIG associated electrode extends.
  • the shield 20 is not connected to any particular potential.
  • the control electrodes 17 and 18 consist of metal tube pieces that are soldered at one end to the foot of the respective electrode.
  • the control electrodes can also have the shape of a cap, the cap expediently having a hole in its base in order to be able to make direct contact with the respective electrode.
  • FIG. 4 shows a spark gap component 31 in which a control electrode 37 in the form of a band-shaped ring with a bandwidth of approximately 2 mm is arranged on the outer circumferential surface of the insulator 32 at the level of the active surface 35 of the potential-carrying electrode 33.
  • This ring is electrically connected to the electrode 33.
  • Its edge facing the counter electrode 34, which is electrically effective for the potential control, has the same height from the active surface of the electrode 33 stood a as the control electrodes according to Figures 1 and 2.
  • FIG. 5 shows a control electrode 40, which essentially consists of a wire ring 41 with a diameter of approximately 0.5 to 1 mm, which is supported on a foot ring 43 via holding elements 42.
  • This control electrode 40 can be placed with the base ring 43 on the base part of an electrode of a spark gap component and optionally soldered there.

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  • Spark Plugs (AREA)

Abstract

In the case of a spark gap element for a screened arrangement, in order to ensure that the ignition voltage is independent from the screening, according to the invention an annular control electrode (7) is arranged at or on the outer sleeve surface of the insulator (2) at the height of the active surface (5) of the live electrode (3), which control electrode is electrically connected to the live electrode (3). The control electrode consists either of a metal coating or of a ribbon-shaped strip or of a metal cap. <IMAGE>

Description

Technisches GebietTechnical field

Die Erfindung liegt auf dem Gebiet der elektrischen Bauelemente und ist bei der konstruktiven Ausgestaltung eines Funkenstrecken­bauelementes anzuwenden, das beim Betrieb innerhalb einer Ab­schirmung angeordnet ist, die das Funkenstreckenbauelement unter Zwischenschaltung eines festen Dielektrikums umgibt. Derartige Funkenstreckenbauelemente werden insbesondere in Kraftfahrzeugen als Vorfunkenstrecken für Zündkerzen eingesetzt.The invention is in the field of electrical components and can be used in the structural design of a spark gap component which, during operation, is arranged within a shield which surrounds the spark gap component with the interposition of a solid dielectric. Such spark gap components are used in particular in motor vehicles as spark gaps for spark plugs.

Stand der TechnikState of the art

Ein bekanntes Funkenstreckenbauelement besteht aus einem rohrförmigen Isolator und zwei Elektroden, wobei die eine Elek­trode in das eine Ende und die andere Elektrode in das andere Ende des Isolators vakuumdicht eingesetzt ist. Im Betriebsfall führt die eine Elektrode das anstehende Potential, während die andere Elektrode erdnahes Potential hat. Die beiden Elektroden haben im übrigen eine im wesentlichen ebene aktive Oberfläche, wobei diese Oberflächen mit einer Schicht aus einem abbrand­festen Material versehen sind. Dieses bekannte Funkenstrecken­bauelement ist zum Einbau in einen Zündkerzenstecker vorgesehen. Im eingebauten Zustand befindet sich das Bauelement in der Durchgangsbohrung eines Isolierkörpers, der von einer Metallab­schirmung umhüllt ist. Die Zündspannung des Funkenstreckenbau­elementes liegt bei etwa 8 bis 10 kV (DE-B-24 18 261).A known spark gap component consists of a tubular insulator and two electrodes, one electrode being inserted in a vacuum-tight manner in one end and the other electrode in the other end of the insulator. In operation, one electrode carries the potential, while the other electrode has potential close to the earth. The two electrodes also have an essentially planar active surface, these surfaces being provided with a layer made of a material which is resistant to erosion. This known spark gap component is intended for installation in a spark plug connector. In the installed state, the component is in the through hole of an insulating body, which is encased by a metal shield. The ignition voltage of the spark gap component is approximately 8 to 10 kV (DE-B-24 18 261).

Andere bekannte Funkenstreckenbauelemente sind auch für höhere Zündspannungen ausgelegt. Um bei Zündspannungen von 2 bis 16 kV u. a. eine Langzeitstabilität der Zündspannung zu gewährleisten, bestehen die aktiven Teile der Elektroden aus Titan, Zirkon und ähnlichen Metallen und das Bauelement ist mit einem Edelgas bei einem Druck von 0,8 bis 10 bar gefüllt (US-C-3 956 657). Zur weiteren Erhöhung der Zündspannung auf 18 kV ist bei einem anderen bekannten Funkenstreckenbauelement u.a. vorgesehen, an der Innenwand des Isolators im Bereich des Entladungsspaltes eine Zündhilfe anzubringen, wobei die Summe der Abstände der Zündhilfe von den verrundeten oder angefasten Elektrodenkanten größer ist als der etwa 0,5 mm betragende Elektrodenabstand. Das als Vorfunkenstrecke bezeichnete Bauelement ist im übrigen im wesentlichen mit Stickstoff bei einem Druck von etwa 15 bar gefüllt (EP-C-0 099 522).Other known spark gap components are also designed for higher ignition voltages. In order to ensure long-term stability of the ignition voltage at ignition voltages from 2 to 16 kV, the active parts of the electrodes consist of titanium, zirconium and similar metals and the component is filled with an inert gas at a pressure of 0.8 to 10 bar (US C-3 956 657). To Another increase in the ignition voltage to 18 kV is provided in another known spark gap component, inter alia, to attach an ignition aid to the inner wall of the insulator in the region of the discharge gap, the sum of the distances of the ignition aid from the rounded or chamfered electrode edges being greater than about 0.5 mm distance between electrodes. The component referred to as the spark gap is essentially filled with nitrogen at a pressure of approximately 15 bar (EP-C-0 099 522).

Die ErfindungThe invention

Beim Einsatz von Vorfunkenstrecken mit einer auf 15 bis 25 kV erhöhten Zündspannung hat sich gezeigt, daß die Zündspannung im geschirmten Zustand der Vorfunkenstrecke von der Zündspannung im ungeschirmten Zustand abweicht, insbesondere niedriger liegt. Ausgehend von einem Funkenstreckenbauelement mit den Merkmalen des Oberbegriffes des Patentanspruches 1 liegt der Erfindung daher die Aufgabe zugrunde, das Funkenstreckenbauele­ment so auszugestalten, daß die Zündspannung im wesentlichen unabhängig von einer späteren Schirmung des Bauelementes ist, insbesondere so auszugestalten, daß die Zündspannung im unge­schirmten Zustand von der Zündspannung im geschirmten Zustand nicht wesentlich unterschritten wird.When using spark gaps with an ignition voltage increased to 15 to 25 kV, it has been shown that the ignition voltage in the shielded state of the spark gap differs from the ignition voltage in the unshielded state, in particular is lower. Starting from a spark gap component with the features of the preamble of claim 1, the invention is therefore based on the object of designing the spark gap component in such a way that the ignition voltage is essentially independent of subsequent shielding of the component, in particular such that the ignition voltage is in the unshielded state of the ignition voltage in the shielded state is not significantly undercut.

Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, daß zum Zwecke der Potentialsteuerung an oder auf der äußeren Mantelfläche des Isolators in Höhe der aktiven Oberfläche der potentialführenden Elektrode eine ringförmige Steuerelektrode angeordnet ist, die mit der potentialführenden Elektrode elektrisch verbunden ist.To achieve this object, the invention provides that, for the purpose of potential control, an annular control electrode is arranged on or on the outer lateral surface of the insulator at the level of the active surface of the potential-carrying electrode, said control electrode being electrically connected to the potential-carrying electrode.

Bezüglich der Verwendung einer Steuerelektrode berücksichtigt die Erfindung die Erkenntnis, daß bei zunehmend höheren Zünd­spannungen das elektrische Feld zwischen den beiden Elektroden des Funkenstreckenbauelementes durch eine umgebende Abschirmung derart beeinflußt wird, daß eine Erhöhung der Feldstärke an der umlaufenden Kante der aktiven Oberfläche der potentialführenden Elektrode auftritt. Dadurch wird die Zündspannung herabgesetzt. Durch Einsatz der erfindungsgemäßen Steuerelektrode wird dagegen das elektrische Feld derart beeinflußt, daß es im interessieren­den Bereich im geschirmten oder ungeschirmten Zustand des Funken­streckenbauelementes keine wesentlichen Unterschiede aufweist.With regard to the use of a control electrode, the invention takes into account the knowledge that, at increasingly higher ignition voltages, the electrical field between the two electrodes of the spark gap component is influenced by a surrounding shield such that an increase in the field strength at the circumferential edge of the active surface of the potential-carrying electrode occurs. This lowers the ignition voltage. By using the control electrode according to the invention, on the other hand, the electric field is influenced in such a way that there are no significant differences in the area of interest in the shielded or unshielded state of the spark gap component.

Die Wirksamkeit der erfindungsgemäßen Potentialsteuerung hängt u.a. ab von dem Abstand, mit dem die Abschirmung das Funken­streckenbauelement, und d.h. insbesondere die Elektroden, um­gibt, und weiterhin davon, wieweit die Steuerelektrode bzw. die wirksame Kante der Steuerelektrode in Achsrichtung des Funken­streckenbauelementes von der aktiven Oberfläche der potential­führenden Elektrode entfernt ist. Je geringer der Abstand der Abschirmung ist, um so genauer muß die Position der Steuerelek­trode festgelegt sein. Es hat sich als zweckmäßig erwiesen, den Höhenabstand zwischen der Steuerelektrode und der aktiven Ober­fläche der zugehörigen Elektrode so zu wählen, daß er höchstens 10 % des kleinsten Abstandes der aktiven Oberflächen beider Elek­troden beträgt. - Die Steuerelektrode ist zweckmäßig metallisch auszubilden und kann beispielsweise aus einer galvanisch aufge­brachten Metallisierung oder einer aufgestrichenen Leitsilber­schicht bestehen. Man kann aber auch einen Drahtring oder einen bandförmigen Ring mit einer Bandbreite von wenigstens 1 mm oder eine sich bis zum Fußteil der zugehörigen Elektrode erstreckende Metallkappe vorsehen, die beispielsweise mit der zugehörigen Elektrode verlötet ist.The effectiveness of the potential control according to the invention depends, among other things. from the distance that the shield connects the spark gap device, and i.e. in particular surrounds the electrodes, and furthermore the extent to which the control electrode or the effective edge of the control electrode is removed from the active surface of the potential-carrying electrode in the axial direction of the spark gap component. The smaller the distance between the shields, the more precisely the position of the control electrode must be determined. It has proven to be expedient to choose the height distance between the control electrode and the active surface of the associated electrode such that it is at most 10% of the smallest distance between the active surfaces of the two electrodes. The control electrode is expediently of metallic design and can consist, for example, of a galvanically applied metallization or a coated conductive silver layer. However, it is also possible to provide a wire ring or a band-shaped ring with a band width of at least 1 mm or a metal cap which extends to the base part of the associated electrode and is soldered to the associated electrode, for example.

Die Anordnung einer Steuerelektrode allein an der potential­führenden Elektrode ist vor allem dann sinnvoll, wenn die Ab­schirmung fest auf Erdpotential liegt. Bei floatendem Potential für die Abschirmung ist es notwendig, beiden Elektroden eine Steuerelektrode zuzuordnen. Dies ist aber auch bei geerdeter Abschirmung möglich.The arrangement of a control electrode only on the potential-carrying electrode is particularly useful when the shield is firmly at ground potential. If the shielding potential is floating, it is necessary to assign a control electrode to both electrodes. However, this is also possible when the shield is grounded.

Abbildungen der ZeichnungIllustrations of the drawing

Vier Ausführungsbeispiele des neuen Funkenstreckenbauelementes sind in den Figuren 1 bis 5 dargestellt. Dabei zeigt

  • Fig. 1 ein Funkenstreckenbauelement, bei dem allein der poten­tialführenden Elektrode eine Steuerelektrode zugeord­net ist,
  • Fig. 2 ein Funkenstreckenbauelement, das innerhalb einer Abschir­mung mit floatendem Potential angeordnet ist und bei dem demzufolge beiden Elektroden eine Steuerelektrode zugeord­net ist,
  • Fig. 3 ein Funkenstreckenbauelement gemäß Figur 1 mit zugeordneter Abschirmung,
  • Fig. 4 ein Funkenstreckenbauelement mit einer Steuerelektrode in Form eines bandförmigen Ringes und
  • Fig. 5 eine Steuerelektrode in Form eines Drahtringes.
Four exemplary embodiments of the new spark gap component are shown in FIGS. 1 to 5. It shows
  • 1 shows a spark gap component in which only the potential-carrying electrode is assigned a control electrode,
  • 2 shows a spark gap component which is arranged within a shield with a floating potential and in which consequently a control electrode is assigned to both electrodes,
  • 3 shows a spark gap component according to FIG. 1 with an associated shield,
  • Fig. 4 is a spark gap component with a control electrode in the form of a band-shaped ring and
  • Fig. 5 shows a control electrode in the form of a wire ring.

AusführungsbeispieleEmbodiments

Fig. 1 zeigt ein Funkenstreckenbauelement 1, das im wesentlichen aus dem rohrförmigen Glas- oder Keramikisolator 2 und den beiden Elektroden 3 und 4 besteht, wobei die Elektroden aktive Ober­flächen 5 bzw. 6 aufweisen. Die aktiven Oberflächen haben von­einander einen Abstand A von etwa 6 mm.1 shows a spark gap component 1, which essentially consists of the tubular glass or ceramic insulator 2 and the two electrodes 3 and 4, the electrodes having active surfaces 5 and 6, respectively. The active surfaces are at a distance A of about 6 mm from one another.

Mit der Elektrode 3 elektrisch verbunden ist eine zylindrische Steuerelektrode 7, die sich vom Fußteil 9 der Elektrode 3 ent­lang der äußeren Mantelfläche des Isolators 2 in Richtung auf die Gegenelektrode 4 bis zur Höhe der aktiven Oberfläche 5 der Elektrode 3 erstreckt. Die Steuerelektrode endet in einem Höhenabstand a von der aktiven Oberfläche der Elektrode 3. Die­ser Abstand a ist kleiner als 10 % des Abstandes A und beträgt etwa 0,5 mm. - Die Steuerelektrode 7 besteht aus einer aufgebrachten Metallisierung einem Metall-Silikat-Gemisch.A cylindrical control electrode 7 is electrically connected to the electrode 3 and extends from the foot part 9 of the electrode 3 along the outer circumferential surface of the insulator 2 in the direction of the counter electrode 4 to the height of the active surface 5 of the electrode 3. The control electrode ends at a height distance a from the active surface of the electrode 3. This distance a is less than 10% of the distance A and is approximately 0.5 mm. - The control electrode 7 consists of an applied metallization of a metal-silicate mixture.

Bei Einbau des Funkenstreckenbauelementes gemäß Figur 1 in eine geerdete Abschirmung ist darauf zu achten, daß die Elektrode 3 die potentialführende Elektrode ist und die Elektrode 4 direkt oder über einen Widerstand mit der Abschirmung verbunden ist. Ein Ausführungsbeispiel hierfür zeigt Figur 3, wobei das Funkenstreckenbauelement 1 von einem festen Dielektrikum 21 und der Abschirmung 20 umgeben und die Elektrode 4 mit der Abschirmung 20 elektrisch verbunden ist.When installing the spark gap component according to FIG. 1 in a grounded shield, care must be taken that the electrode 3 is the potential-carrying electrode and the electrode 4 is direct or connected to the shield via a resistor. An exemplary embodiment of this is shown in FIG. 3, the spark gap component 1 being surrounded by a solid dielectric 21 and the shield 20 and the electrode 4 being electrically connected to the shield 20.

Figur 2 zeigt ein Funkenstreckenbauelement 11 innerhalb einer Abschirmung 20, wobei der Raum zwischen der Abschirmung 20 und dem Bauelement 11 mit einem festen Dielektrikum 21 ausgefüllt ist. Bei dem festen Dielektrikum 21 handelt es sich insbesonde­re um einen isolierenden Kunststoff, beispielsweise einen Schrumpfschlauch.FIG. 2 shows a spark gap component 11 within a shield 20, the space between the shield 20 and the component 11 being filled with a solid dielectric 21. The solid dielectric 21 is in particular an insulating plastic, for example a shrink tube.

Das Funkenstreckenbauelement 11 besteht aus dem rohrförmigen Isolator 12, in den die beiden Elektroden 13 und 14 eingesetzt sind. Die aktiven Oberflächen 15 und 16 der beiden Elektroden haben wie in Fig. 1 einen Abstand A. Jeder Elektrode ist eine Steuerelektrode 17 bzw. 18 zugeordnet, die sich vom Fußteil 19 der jeweiligen Elektrode in Richtung auf die Gegenelektrode bis zur Höhe der aktiven Oberfläche der zugehörigen Elektrode er­streckt. Die Abschirmung 20 ist mit keinem bestimmten Potential verbunden. - Die Steuerelektroden 17 und 18 bestehen aus metallenen Rohrstücken, die an ihrem einen Ende mit dem Fuß der jeweiligen Elektrode verlötet sind. Die Steuerelektroden können auch die Form einer Kappe haben, wobei die Kappe in ihrem Boden zweckmäßig ein Loch aufweist, um die jeweilige Elektrode direkt kontaktieren zu können.The spark gap component 11 consists of the tubular insulator 12, in which the two electrodes 13 and 14 are inserted. The active surfaces 15 and 16 of the two electrodes have a distance A as in FIG associated electrode extends. The shield 20 is not connected to any particular potential. - The control electrodes 17 and 18 consist of metal tube pieces that are soldered at one end to the foot of the respective electrode. The control electrodes can also have the shape of a cap, the cap expediently having a hole in its base in order to be able to make direct contact with the respective electrode.

Figur 4 zeigt ein Funkenstreckenbauelement 31, bei dem in Höhe der aktiven Oberfläche 35 der potentialführenden Elektrode 33 auf der äußeren Mantelfläche des Isolators 32 eine Steuerelek­trode 37 in Form eines bandförmigen Ringes mit einer Bandbreite von etwa 2 mm angeordnet ist. Dieser Ring ist mit der Elektrode 33 elektrisch verbunden. Seine der Gegenelektrode 34 zugewandte, für die Potentialsteuerung elektrisch wirksame Kante hat von der aktiven Oberfläche der Elektrode 33 den gleichen Höhenab­ stand a wie die Steuerelektroden gemäß den Figuren 1 und 2.FIG. 4 shows a spark gap component 31 in which a control electrode 37 in the form of a band-shaped ring with a bandwidth of approximately 2 mm is arranged on the outer circumferential surface of the insulator 32 at the level of the active surface 35 of the potential-carrying electrode 33. This ring is electrically connected to the electrode 33. Its edge facing the counter electrode 34, which is electrically effective for the potential control, has the same height from the active surface of the electrode 33 stood a as the control electrodes according to Figures 1 and 2.

Figur 5 zeigt eine Steuerelektrode 40, die im wesentlichen aus einem Drahtring 41 mit einem Durchmesser von etwa 0,5 bis 1 mm besteht, der sich über Haltelemente 42 auf einem Fußring 43 abstützt. Diese Steuerelektrode 40 kann mit dem Fußring 43 auf das Fußteil einer Elektrode eines Funkenstreckenbauelementes aufgesetzt und dort gegebenenfalls verlötet werden.FIG. 5 shows a control electrode 40, which essentially consists of a wire ring 41 with a diameter of approximately 0.5 to 1 mm, which is supported on a foot ring 43 via holding elements 42. This control electrode 40 can be placed with the base ring 43 on the base part of an electrode of a spark gap component and optionally soldered there.

Claims (7)

1. Funkenstreckenbauelement zur Anordnung innerhalb einer das Funkenstreckenbauelement unter Zwischenschaltung eines festen Dielektrikums umgebenden Abschirmung, bestehend aus einem rohrförmigen Isolator und zwei Elektroden mit im wesentlichen ebener aktiver Oberfläche, wobei die potentialführende Elektro­de in das eine Ende und die Gegenelektrode in das andere Ende des Isolators eingesetzt ist,
dadurch gekennzeichnet ,
daß zum Zwecke der Potentialsteuerung an oder auf der äußeren Mantelfläche des Isolators (2) in Höhe der aktiven Oberfläche (5) der potentialführenden Elektrode (3) eine ringförmige Steuerelektrode (7) angeordnet ist, die mit der potentialführen­den Elektrode (3) elektrisch verbunden ist.1. Spark gap component for arrangement within a shield surrounding the spark gap component with the interposition of a solid dielectric, consisting of a tubular insulator and two electrodes with a substantially planar active surface, the potential-carrying electrode being inserted in one end and the counter electrode in the other end of the insulator is
characterized ,
that for the purpose of potential control on or on the outer surface of the insulator (2) at the level of the active surface (5) of the potential-carrying electrode (3), an annular control electrode (7) is arranged, which is electrically connected to the potential-carrying electrode (3) . 2. Funkenstreckenbauelement nach Anspruch 1,
dadurch gekennzeichnet ,daß auch der Gegenelektrode (14) eine ringförmige Steuerelektrode (18) zu­geordnet ist.2. spark gap component according to claim 1,
characterized in that an annular control electrode (18) is also assigned to the counter electrode (14). 3. Funkenstreckenbauelement nach Anspruch 1 oder 2,
dadurch gekennzeichnet , daß der Höhen­abstand zwischen der Steuerelektrode (7) und der aktiven Ober­fläche (5) der zugehörigen Elektrode (3) höchstens 10 % des kleinsten Abstandes der aktiven Oberflächen (5,6) beider Elektroden (3,4) beträgt.3. spark gap component according to claim 1 or 2,
characterized in that the height distance between the control electrode (7) and the active surface (5) of the associated electrode (3) is at most 10% of the smallest distance between the active surfaces (5,6) of the two electrodes (3,4). 4. Funkenstreckenbauelement nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet , daß die Steuerelektrode aus einem bandförmigen Ring (37) mit einer Bandbreite von wenigstens 1 mm besteht.4. spark gap component according to one of claims 1 to 3,
characterized in that the control electrode consists of a band-shaped ring (37) with a bandwidth of at least 1 mm. 5. Funkenstreckenbauelement nach Anspruch 4, dadurch gekennzeichnet, daß sich die Steuerelektrode bis zum Fußteil (8) der zugehörigen Elektrode (3) erstreckt.5. Spark gap component according to claim 4, characterized in that the control electrode extends to the foot part (8) of the associated electrode (3). 6. Funkenstreckenbauelement nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet , daß die Steuer­elektrode (7) aus einem metallenen Belag besteht.6. spark gap component according to one of claims 1 to 5,
characterized in that the control electrode (7) consists of a metal coating. 7. Funkenstreckenbauelement nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet , daß die Steuer­elektrode (7) aus einer Metallkappe besteht.7. spark gap component according to one of claims 1 to 5,
characterized in that the control electrode (7) consists of a metal cap.
EP89730009A 1989-01-18 1989-01-18 Spark gap element for shielded mounting Expired - Lifetime EP0378963B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP89730009A EP0378963B1 (en) 1989-01-18 1989-01-18 Spark gap element for shielded mounting
DE58907951T DE58907951D1 (en) 1989-01-18 1989-01-18 Spark gap component for shielded arrangement.
JP2006980A JP2911156B2 (en) 1989-01-18 1990-01-16 Spark gap device
US07/467,031 US5142194A (en) 1989-01-18 1990-01-18 Spark gap component of particular spacing mounted within a shield

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89730009A EP0378963B1 (en) 1989-01-18 1989-01-18 Spark gap element for shielded mounting

Publications (2)

Publication Number Publication Date
EP0378963A1 true EP0378963A1 (en) 1990-07-25
EP0378963B1 EP0378963B1 (en) 1994-06-22

Family

ID=8203105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89730009A Expired - Lifetime EP0378963B1 (en) 1989-01-18 1989-01-18 Spark gap element for shielded mounting

Country Status (4)

Country Link
US (1) US5142194A (en)
EP (1) EP0378963B1 (en)
JP (1) JP2911156B2 (en)
DE (1) DE58907951D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407976A1 (en) * 1989-07-12 1991-01-16 Yazaki Corporation Discharge device and ignition system with series gap using discharge device
US5642721A (en) * 1992-01-06 1997-07-01 Ikeya; Kaname Double ignition system for internal combustion engines, ignition plug for double ignition systems, and electric spark generator
US6724605B1 (en) 1999-06-16 2004-04-20 Epcos Ag Gas-filled surge diverter with electrode connections in the shape of band-type clips

Families Citing this family (8)

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Publication number Priority date Publication date Assignee Title
DE4033927A1 (en) * 1990-10-25 1992-04-30 Hoechst Ceram Tec Ag SURGE ARRESTERS
US5739637A (en) * 1995-09-28 1998-04-14 Sandia Corporation Cold cathode vacuum discharge tube
US6037715A (en) * 1997-11-19 2000-03-14 Maxwell Technologies Systems Division, Inc. Spark switch having coaxial electrodes with increased electrode surface area exposure
FR2816769B1 (en) * 2000-11-16 2004-12-24 France Etat Armement EXPLODER FOR HIGH POWER ELECTRIC GENERATOR
DE10151565B4 (en) * 2001-10-23 2004-09-30 Diehl Munitionssysteme Gmbh & Co. Kg microwave generator
US6916374B2 (en) * 2002-10-08 2005-07-12 Micron Technology, Inc. Atomic layer deposition methods and atomic layer deposition tools
DE102005016848A1 (en) * 2005-04-12 2006-10-19 Epcos Ag Surge arresters
DE102005036265A1 (en) 2005-08-02 2007-02-08 Epcos Ag radio link

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US3956657A (en) * 1972-07-18 1976-05-11 Robert Bosch G.M.B.H. Pre-ignition gap
US3995183A (en) * 1974-04-16 1976-11-30 Siemens Aktiengesellschaft Spark gap component for use in ignition systems of internal combustion engines
US4475055A (en) * 1982-01-28 1984-10-02 The United States Of America As Represented By The United States Department Of Energy Spark gap device for precise switching
US4578733A (en) * 1983-06-25 1986-03-25 Kabushiki Kaisha Sankosha Surge voltage arrester
US4631453A (en) * 1983-08-29 1986-12-23 Joslyn Mfg. And Supply Co. Triggerable ceramic gas tube voltage breakdown device

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US3825789A (en) * 1973-06-29 1974-07-23 Gen Electric Vacuum arc devices with hard, ductile, ferrous electrodes
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EP0242688B1 (en) * 1986-04-22 1990-07-18 Siemens Aktiengesellschaft Surge arrester

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956657A (en) * 1972-07-18 1976-05-11 Robert Bosch G.M.B.H. Pre-ignition gap
US3995183A (en) * 1974-04-16 1976-11-30 Siemens Aktiengesellschaft Spark gap component for use in ignition systems of internal combustion engines
US4475055A (en) * 1982-01-28 1984-10-02 The United States Of America As Represented By The United States Department Of Energy Spark gap device for precise switching
US4578733A (en) * 1983-06-25 1986-03-25 Kabushiki Kaisha Sankosha Surge voltage arrester
US4631453A (en) * 1983-08-29 1986-12-23 Joslyn Mfg. And Supply Co. Triggerable ceramic gas tube voltage breakdown device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407976A1 (en) * 1989-07-12 1991-01-16 Yazaki Corporation Discharge device and ignition system with series gap using discharge device
US5080083A (en) * 1989-07-12 1992-01-14 Yazaki Corporation Discharge device and ignition system with series gap using discharge device
US5642721A (en) * 1992-01-06 1997-07-01 Ikeya; Kaname Double ignition system for internal combustion engines, ignition plug for double ignition systems, and electric spark generator
US6724605B1 (en) 1999-06-16 2004-04-20 Epcos Ag Gas-filled surge diverter with electrode connections in the shape of band-type clips

Also Published As

Publication number Publication date
EP0378963B1 (en) 1994-06-22
JP2911156B2 (en) 1999-06-23
JPH02236984A (en) 1990-09-19
DE58907951D1 (en) 1994-07-28
US5142194A (en) 1992-08-25

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