EP0061655A2 - Switch chamber for electric contacts sealed from the environment - Google Patents

Switch chamber for electric contacts sealed from the environment Download PDF

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Publication number
EP0061655A2
EP0061655A2 EP82102182A EP82102182A EP0061655A2 EP 0061655 A2 EP0061655 A2 EP 0061655A2 EP 82102182 A EP82102182 A EP 82102182A EP 82102182 A EP82102182 A EP 82102182A EP 0061655 A2 EP0061655 A2 EP 0061655A2
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EP
European Patent Office
Prior art keywords
getter
switching chamber
chamber according
contacts
substance
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Application number
EP82102182A
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German (de)
French (fr)
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EP0061655A3 (en
EP0061655B2 (en
EP0061655B1 (en
Inventor
Hans Sauer
Takashi Takada
Yukihiro Kondo
Tetsuo Mori
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Cessione sds - Relais AG
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Matsushita Electric Works Ltd
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Priority claimed from JP56048766A external-priority patent/JPS57162644A/en
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to AT82102182T priority Critical patent/ATE22749T1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/64—Protective enclosures, baffle plates, or screens for contacts
    • H01H1/645—Protective enclosures, baffle plates, or screens for contacts containing getter material

Definitions

  • the invention relates to a switching chamber which is sealed off from the environment and in which electrical contacts and at least one porous getter are accommodated, a substance being used as the substance which has an adsorptive effect on substances which form foreign layers on the contacts.
  • getters in tightly sealed contact chambers is intended to serve to keep foreign layer-forming molecules, such as organic compounds, away from the contacts through adsorption and to bind them to themselves.
  • the goal set could not be achieved because it was not recognized that a generally high gettering effect could even be harmful to electrical switching elements.
  • the pores of such getters have an average diameter of only 2 to 4 nm and can there mainly only correspondingly small molecules, such as. B. adsorb the protective gases of the contact chamber.
  • the invention is based on the object of providing a getter for a sealed switching chamber which, for a long time and selectively, predominantly binds molecules which tend to form foreign layers on the contacts and which can be used without problems in relays and switches.
  • this object is achieved in that the pores of the getter material located in the switching chamber are predominantly larger than 3 nm and smaller than 100 nm and that the mean value of the pore diameter is in the range of approximately 7-20 nm.
  • the object is to eliminate the shortcomings of the known solutions and to create an electrical heat storage furnace which is designed as a closed system and which has a significantly larger heat capacity, can be operated more economically and gives a more pleasant feeling of warmth.
  • the invention is based on the knowledge that the set task by heating the core structure in the temperature range of the optimal heat storage ability and by avoiding direct contact between the air flowing through and the air and the core structure can be solved easily and satisfactorily.
  • the heating element of the heat storage furnace should also be designed accordingly.
  • the facing bricks with their recesses are arranged next to each other with their smallest side surface and narrower but longer side surfaces, the core structure thus formed is tightly enclosed on the outside with an insulating layer, between the insulating layer and a large-area heat exchanger is formed for the outer clothing of the furnace, and the outer clothing is composed of module elements.
  • the heating element ie the heating coil than 100 nm with an average value in the range of about 7 to 20 nm.
  • a layer 2 of water glass for example Na 2 SiO.
  • this layer 2 can also be provided on the side surfaces of the getter pill 1, so that only the surface la of the getter pill 1 facing the switching chamber is free as an active surface.
  • the interior of the relay forming the switching chamber is preferably filled with a protective gas of such a moisture content that a relative atmospheric humidity of not less than 5% and not more than 40% is established by the action of the getter material.
  • the getter material ensures a constant moisture content of the protective gas by adsorption of H 2 O molecules, which can diffuse from the environment if the switching chamber is hermetically sealed. This enables a constant dielectric strength with regard to the contacts.
  • the getter material is preferably produced in a sintering process.
  • the binder required for the shaping evaporates during the sintering.
  • the desired pore size can be achieved by choosing the binder, the pressure during shaping, the sintering temperature and the sintering time.
  • the attachment of the getter pill 1 to the metallic housing cap 17 causes a temperature gradient between the contacts and the getter material such that the getter material is generally cooler than the contacts. This favors the precipitation of harmful substances on the getter pill 1.
  • the relay is warmer than the environment due to the energy conversion taking place on the coil and contacts, so that heat is emitted via the housing.
  • the cooling of the housing that takes place here simultaneously lowers the temperature level of the getter substance, which favors its getter effect.
  • the spatial size of the getter material is also taken into account its gettering effect and the volume of the switching chamber are selected so that a noteworthy reduction in pressure in the switching chamber is excluded.
  • constant dielectric strength can be guaranteed in the long term.
  • the getter substance can preferably be activated at a temperature of at least 100 ° C. and a negative pressure of approx. 10 bar. As a result, gases bound in the pores and also crystalline bound H 2 O are released.
  • a plate 5 made of getter material is preferably used, which is provided with groove-like depressions 6 that run orthogonally to one another in such a way that these depressions 6 predetermined breaking points for creating individual getter pills 1 (FIG. 2 (b)) ) form.
  • the individual getter pills 1 are then covered in accordance with FIG. 2 (c) on one of their two largest surfaces, optionally in accordance with FIG. 2 (d) on the four side surfaces, with a layer 2 of water glass. Then the large surface of the getter pill 1 covered with the water glass layer 2 according to FIG. 2 (e) is coated with adhesive 4, which is used to fasten the getter pill to a wall or another structural element of the switching chamber.

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Abstract

Die erfindung betrifft eine von der Umgebung abgedichtete Schaltkammer, in der elektrische Kontakte und wenigstens ein poröser Getter untergebracht sind, wobei als Getterstoff eine Substanz verwendet ist, die bezüglich Stoffen, die auf den Kontakten Fremschichten bilden, adsorptiv wirkt. Die Verwendung von Gettern in dicht abgeschlossenen Kontaktkammern von Relais und Schaltern dient dem Zweck, fremdschichtbildende Moleküle wie z.B. organische Verbindungen von den Kontakten fernzuhalten und langzeitig und selektiv an sich zu binden. Dazu sind die Poren des Getterstoffes überwiegend größer als 3 nm und kleiner als 100 nm gewählt, wobei der Mittelwert der Porendurchmesser im Bereich von etwa 7 - 20 nm liegt.The invention relates to a switching chamber sealed from the environment, in which electrical contacts and at least one porous getter are accommodated, a substance being used as the getter material which has an adsorptive effect on substances which form foreign layers on the contacts. The use of getters in tightly sealed contact chambers of relays and switches serves the purpose of forming foreign layer molecules such as e.g. to keep organic connections away from the contacts and to bind them long-term and selectively. For this purpose, the pores of the getter material are predominantly chosen to be larger than 3 nm and smaller than 100 nm, the mean value of the pore diameters being in the range of approximately 7-20 nm.

Description

Die Erfindung betrifft eine von der Umgebung abgedichtete Schaltkammer in der elektrische Kontake und wenigstens ein poröser Getter untergebracht sind, wobei als.Getterstof eine Substanz verwendet ist, diebezüglich Stoffen, die auf den Kontakten Fremschichten bilden, adsorptiv wirkt.The invention relates to a switching chamber which is sealed off from the environment and in which electrical contacts and at least one porous getter are accommodated, a substance being used as the substance which has an adsorptive effect on substances which form foreign layers on the contacts.

Die Verwendung von Gettern in dicht abgeschlossenen Kontaktkammern soll den Zweck erfüllen, fremdschichtbildende Moleküle, wie organische Verbindungen, durch Adsorption langfristig von den Kontakten fernzuhalten und an sich zu binden. Trotz dieser Einsicht, daß also selektiv gegettert werden muß, konnte das gesteckte Ziel nicht erreicht werden, weil nicht erkannt wurde, daß eine generell hohe Getterwirkung für elektrische Schaltelemente sogar schädlich sein kann. Dies ist z. B. der Fall, wenn herkömmliche, aus der Vakuumtechnik bekannte Getterstoffe eingesetzt werden. Die Poren solcher Getter haben nämlich im Mittel lediglich Durchmesser von 2 bis 4 nm und können daher überwiegend nur entsprechend kleine Moleküle, wie z. B. die von Schutzgasen der Kontaktkammer, adsorbieren. In der Zeitschrift "Siemens Components" 19 (1981), Heft 5, S. 158 findet sich sogar ein Hinweis, daß bei fertigungsbedingter Variation der Porengröße in weiten Grenzen die innere Oberfläche eines Aktivkohlegetters bis zu 2000 m2/g betragen kann, was einen Rückschluß auf extrem kleine Poren, sogenannte Mikroporen, von weniger als 2 nm Durchmesser zuläßt. Verwendet man einen solchen Getter, so hat dies zur Folge, daß ein Unterdruck entstehen kann, der die Spannungsfestigkeit der Kontakte erheblich reduziert. Ist andererseits die Leckrate der Kontaktkammer größer als 10-5 cm3 · bar/s, so kann es. sein, daß der Getter durch von außen eindringende Gase gesättigt ist bevor der Schalter oder das Relais zum Einsatz kommt. Eine Getterung fremdschichtbildender Moleküle findet dabei nur in unbedeutendem Umfang statt.The use of getters in tightly sealed contact chambers is intended to serve to keep foreign layer-forming molecules, such as organic compounds, away from the contacts through adsorption and to bind them to themselves. Despite this insight that selective gating is required, the goal set could not be achieved because it was not recognized that a generally high gettering effect could even be harmful to electrical switching elements. This is e.g. B. the case when conventional getter materials known from vacuum technology are used. The pores of such getters have an average diameter of only 2 to 4 nm and can there mainly only correspondingly small molecules, such as. B. adsorb the protective gases of the contact chamber. In the Journal "Siemens C omponents" 19 (1981), No. 5, page 158 there is even a hint that with production-related variation of the pore size within wide limits, the inner surface m of a Aktivkohlegetters up to 2000 / may be g 2, which allows conclusions to be drawn about extremely small pores, so-called micropores, of less than 2 nm in diameter. Using such a G etter, this has the consequence that a negative pressure can occur, which significantly reduces the dielectric strength of the contacts. On the other hand, if the leak rate of the contact chamber is greater than 10 -5 cm 3 · bar / s, it can. be that the getter is saturated by gases entering from outside before the switch or relay is used. Gettering of foreign layer-forming molecules takes place only to an insignificant extent.

So wurde ebenfalls aus der Zeitschrift "Siemens Components" 19 (1981), Heft 5 bekannt, daß die relative Gewichtszunahme eines mit Styroldampf beladenen, durch eine spezielle Technologie hergestellten Aktivkohlegetters, dessen Porengrößen in weiten Grenzen variiert waren, bereits nach 2 1/2 Stunden ca. 50 % betrug und sich dabei eine Sättigung des Getters ergab. Da ferner angegeben wurde, daß dieser Getter ein Adsorptionsvermögen von ΔV = 2 cm3 hat und'ein Kontaktraum von V1 = 0,12 cm3 zur Verfügung stand, so ergibt sich nach Einbringen eines solchen Getters ein fiktives Innenvolumen von V2 = V1 + ΔV = 2,12 cm3. S o is also known from the Journal "Siemens Components" 19 (1981), Heft 5, that the relative increase in weight of a loaded with styrene vapor, produced by a special technology Aktivkohlegetters whose pore sizes were varied within wide limits, after 2 1/2 hours about 50%, and thereby a saturation of the G etters revealed. Since it was further stated that this getter has an adsorption capacity of ΔV = 2 cm 3 and a contact space of V 1 = 0.12 cm 3 was available, a fictitious internal volume of V 2 = V results after the introduction of such a getter 1 + ΔV = 2.12 cm3.

Erfolgt unter solchen Gegebenheiten eine dichte Verkapselung der Kontaktkammer bei einem Druck von P1 = 1 bar = 105 N/m2, so sinkt bei thermischem Gleichgewicht der Druck in dem Kontaktraum etwa auf den Wert

Figure imgb0001
was eine Minderung der Spannungsfestigkeit um mehr als 60 % zur Folge hat.If, under such circumstances, the contact chamber is tightly encapsulated at a pressure of P 1 = 1 bar = 10 5 N / m 2 , the pressure in the contact space drops approximately to the value under thermal equilibrium
Figure imgb0001
 which results in a reduction in dielectric strength of more than 60%.

Um sowohl eine Qualitätsminderung durch Druckabsenkung als auch eine zu frühe Sättigung des Getters zu vermeiden, wurde in der DE-PS 24 62 277 vorgeschlagen, einen relativ großporigen BaOFe-Magneten zu einem Getter zu aktivieren und eventuell noch einen Zusatzgetter zu verwenden. Dies :erwies sich langfristig als recht brauchbar. Allein mit dem aktivierten Magneten wurde eine Reduzierung des Fremdschichtwiderstandes an den Kontakten um ca. 10 mOhm und damit eine etwa 100fach höhere Kontaktsicherheit erreicht; aber ein Rest von Fremdschichten in der Größenordnung um durchschnittlich 10 mOhm blieb erhalten. Das Hinzufügen eines Zusatzgetters mit wesentlich kleineren Poren brachte weitere Erfolge. Das wiederum hat den Nachteil erhöhter Herstellkosten und/oder eine Beschränkung auf gepolte Schalter bzw. Relais.In order to avoid both a reduction in quality due to a drop in pressure and premature saturation of the getter, it was proposed in DE-PS 24 62 277 to activate a relatively large-pored BaOFe magnet to form a getter and possibly to use an additional getter. This: turned out to be quite useful in the long term. With the activated magnet alone, a reduction of the external layer resistance at the contacts by approx. 10 mOhm and thus an approximately 100-fold higher contact reliability was achieved; but a remnant of foreign layers in the order of magnitude of an average of 10 mOhm remained. Adding a Z usatzgetters with much smaller pore brought further success. This in turn has the disadvantage of increased manufacturing costs and / or a limitation to polarized switches or relays.

Es wurden auch schon in der DE-PS 1 243 271, der DE-AS 2 646 680 und der DE-OS 29 31 596 Vorschläge unterbreitet, die Kontaktkammer bzw. einen als Kontaktkammer ausgebildeten Spulenkörper-ganz oder anteilig aus. einem Getterstoff zu fertigen. Im einen Fall sollten damit von Ent- ladungen im Kontaktraum herrührende Ionen gebunden werden und im anderen Fall eine noch höhere Getterwirkung als mit bekannten Getterstoffen wie Aktivkohle erzielt werden. Damit wird aber der vorerwähnte Nachteil einer Unterdruckbildung noch erhöht, zumal hierbei lediglich die Getterwirkung,nicht aber das Adsorptionsvermögen gegenüber fremdschichtbildenden Molekülen beachtet wurde. Vielmehr müßte man sogar die getternde Oberfläche bzw. die Getterwirkung auf ein bestimmtes Maß begrenzen, damit kein wesentlicher Unterdruck entsteht. Anders wäre dies bei Vakuum- bzw. Hochvakuum-Kontaktkammern in denen Drücke unter 10 mbar herrschen.Proposals have already been made in DE-PS 1 243 271, D E - A S 2 646 680 and D E -OS 29 31 596 for the contact chamber or a bobbin formed as a contact chamber, in whole or in part. a G etter material to manufacture. In one case, so that should e nt charges in the contact chamber originating ions are bound and in the other case an even higher getter than with known getters such as activated carbon can be achieved. However, this increases the above-mentioned disadvantage of negative pressure formation, especially since only the getter effect, but not the adsorption capacity with regard to molecules that form foreign layers, was taken into account. Rather, one would even have to limit the gettering surface or getter effect to a certain extent, so that no significant negative pressure arises. This would be different with vacuum or high vacuum contact chambers in which pressures below 10 mbar prevail.

Der Erfindung liegt nun die Aufgabe zugrunde, für eine abgedichtete Schaltkammer einen Getter vorzusehen, der langzeitig und selektiv überwiegend Moleküle bindet, die zur Fremdschichtbildung an den Kontakten neigen,und der problemlos bei Relais und Schaltern einsetzbar ist.The invention is based on the object of providing a getter for a sealed switching chamber which, for a long time and selectively, predominantly binds molecules which tend to form foreign layers on the contacts and which can be used without problems in relays and switches.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die Poren des in der Schaltkammer befindlichen Getterstoffes überwiegend größer als 3 nm und kleiner als 100 nm sind und daß der Mittelwert der Porendurchmesser im Bereich von etwa 7 - 20 nm liegt.According to the invention, this object is achieved in that the pores of the getter material located in the switching chamber are predominantly larger than 3 nm and smaller than 100 nm and that the mean value of the pore diameter is in the range of approximately 7-20 nm.

Kernstrukturen durchzuheizenoHeating through core structures

In unserer Erfindung wird also die Aufgabe gestellt, die Unzulänglichkeiten der bekannten Lösungen zu eliminieren und einen elektrischen Wärmespeicherofen zu schaffen, der als geschlossenes System ausgebildet ist und der eine wesentlich grössere Wärmekapazität hat, wirtschaftlicher betrieben werden kann und ein angenehmeres Wärmegefühl verleiht.In our invention, the object is to eliminate the shortcomings of the known solutions and to create an electrical heat storage furnace which is designed as a closed system and which has a significantly larger heat capacity, can be operated more economically and gives a more pleasant feeling of warmth.

Die Erfindung beruht sich auf der Erkenntnis, dass die gestellte zusammengesetzte Aufgabe durch Aufheizen der Kernstruktur in den Temperaturbereich der optimalen Wärmespeicher fähigkeit und durch Vermeiden der direkten Berührung zwischen der durchströmenden Luft und der Luft und der Kernstruktur einfach und befriedigend gelöst werden kann. Auch das Heizelement des Wärmespeicherofens soll dementsprechend ausgebildet werden.The invention is based on the knowledge that the set task by heating the core structure in the temperature range of the optimal heat storage ability and by avoiding direct contact between the air flowing through and the air and the core structure can be solved easily and satisfactorily. The heating element of the heat storage furnace should also be designed accordingly.

Die Weiterentwicklung , d.h. die Erfindung selbst liegt nun darin, dass die mit ihrer Aussparung zueinander gewandten Ziegel mit ihrer kleinsten Seitenfläche nebeneinander und schmäleren, jedoch längeren Seitenfläche aufeinander angeordnet sind, die so ausgebildete Kernstruktur aussenflächig mit einer Isolierschicht dicht umgeschlossen ist, wobei zwischen der Isolierschicht und der Aussenbekleidung des Ofens ein grossflächiger Wärmetauscher ausgebildet ist, und die Aussenbekleidung aus Modulelementen zusammengesetzt ist. Die grösste Bedeutung dieser Lösung besteht darin, dass der Luftzug wegen der die Kernstruktur dicht umschliessenden Isolierschicht den Heizkörper, d. h. die Heizspirale als 100 nm bei einem Mittelwert im Bereich von etwa 7 bis 20 nm. Zur Vermeidung einer Verunreinigung des Getterwerkstoffs durch den Klebstoff 4 oder dessen Lösungsmittel ist zwischen die Getterpille 1 und den Klebstoff 4 eine als Diffusionsbarriere wirkende Schicht 2 aus Wasserglas (z.B. Na2SiO3 oder K2Si03) eingefügt. Diese Schicht 2 kann auch, wie in Figur 1 gezeigt, an den Seitenflächen der Getterpille 1 vorgesehen sein, so daß nur die der Schaltkammer zugewandte Oberfläche la der Getterpille 1 als aktive Fläche frei ist.The further development, that is to say the invention itself, is that the facing bricks with their recesses are arranged next to each other with their smallest side surface and narrower but longer side surfaces, the core structure thus formed is tightly enclosed on the outside with an insulating layer, between the insulating layer and a large-area heat exchanger is formed for the outer clothing of the furnace, and the outer clothing is composed of module elements. The greatest importance of this solution is that the draft due to the insulating layer tightly surrounding the core structure, the heating element, ie the heating coil than 100 nm with an average value in the range of about 7 to 20 nm. To avoid contamination of the getter material by the adhesive 4 or its solvent, a layer 2 of water glass (for example Na 2 SiO. ) acting as a diffusion barrier acts between the getter pill 1 and the adhesive 4 3 or K 2 Si0 3 ) inserted. As shown in FIG. 1, this layer 2 can also be provided on the side surfaces of the getter pill 1, so that only the surface la of the getter pill 1 facing the switching chamber is free as an active surface.

Vorzugsweise ist der die Schaltkammer bildende Innenraum des Relais mit einem Schutzgas von derartigem Feuchtigkeitsgehalt gefüllt, daß sich durch Einwirkung des Getterstoffes eine relative Luftfeuchtigkeit von nicht weniger als 5% und nicht mehr als 40% einstellt. Hierbei sorgt der Getterstoff durch Adsorption von H20-Molekülen, die bei einer hermetischen Abdichtung der Schaltkammer von der Umgebung nachdiffundieren können, für eine gleichbleibende Feuchtigkeit des Schutzgases. Dies ermöglicht eine konstante Spannungsfestigkeit bezüglich der Kontakte.The interior of the relay forming the switching chamber is preferably filled with a protective gas of such a moisture content that a relative atmospheric humidity of not less than 5% and not more than 40% is established by the action of the getter material. Here, the getter material ensures a constant moisture content of the protective gas by adsorption of H 2 O molecules, which can diffuse from the environment if the switching chamber is hermetically sealed. This enables a constant dielectric strength with regard to the contacts.

Der Getterstoff ist bevorzugt in einem Sinterverfahren hergestellt. Das für die Formgebung erforderliche Bindemittel verdampft dabei während des Sinterns. Durch Wahl des Bindemittels, des Druckes bei der Formgebung, der Sintertemperatur und der Sinterdauer ist dabei die angestrebte Porengröße erreichbar.The getter material is preferably produced in a sintering process. The binder required for the shaping evaporates during the sintering. The desired pore size can be achieved by choosing the binder, the pressure during shaping, the sintering temperature and the sintering time.

Die Befestigung der Getterpille 1 an der metallischen Gehäusekappe 17 bewirkt, daß zwischen den Kontakten und dem Getterstoff ein derartiges Temperaturgefälle besteht, daß der Getterstoff in der Regel kühler ist als die Kontakte. Dadurch wird der Niederschlag schädlicher Substanzen auf der Getterpille 1 begünstigt.The attachment of the getter pill 1 to the metallic housing cap 17 causes a temperature gradient between the contacts and the getter material such that the getter material is generally cooler than the contacts. This favors the precipitation of harmful substances on the getter pill 1.

In der Regel ist das Relais durch den an Spule und Kontakten stattfindenden Energieumsatz wärmer als die Umgebung, so daß Wärme über das Gehäuse abgegeben wird. Die hier stattfindende Abkühlung des Gehäuses erniedrigt gleichzeitig das Temperaturniveau des Getterstoffes, was dessen Getterwirkung begünstigt.As a rule, the relay is warmer than the environment due to the energy conversion taking place on the coil and contacts, so that heat is emitted via the housing. The cooling of the housing that takes place here simultaneously lowers the temperature level of the getter substance, which favors its getter effect.

Ferner ist die räumliche Größe des Getterstoffes unter Berücksichtigung seiner Getterwirkung und des Volumens der Schaltkammer so gewählt, daß eine nennenswerte Druckabsenkung in der Schaltkammer ausgeschlossen ist. Damit kann neben der Getterwirkung auch.konstante Spannungsfestigkeit langfristig gewährleistet werden.The spatial size of the getter material is also taken into account its gettering effect and the volume of the switching chamber are selected so that a noteworthy reduction in pressure in the switching chamber is excluded. In addition to the getter effect, constant dielectric strength can be guaranteed in the long term.

Damit der Getterstoff seine Wirkung entfalten kann, ist der Getterstoff vorzugsweise bei einer Temperatur von mindestens 100°C und einem Unterdruck von ca: 10 bar aktivierbar. Hierdurch werden in den Poren gebundene Gase als auch kristallin gebundenes H20 freigesetzt.So that the getter substance can develop its effect, the getter substance can preferably be activated at a temperature of at least 100 ° C. and a negative pressure of approx. 10 bar. As a result, gases bound in the pores and also crystalline bound H 2 O are released.

Im Rahmen einer rationellen Fertigung wird gemäß Figur 2(a) vorzugsweise von einer Platte 5 aus Getterstoff ausgegangen, die mit orthogonal zu einander verlaufenden rinnenartigen Vertiefungen 6 derart versehen ist, daß diese Vertiefungen 6 Sollbruchstellen zur Schaffung einzelner Getterpillen 1 (Figur 2(b) ) bilden. Die einzelnen Getterpillen 1 werden sodann gemäß Figur 2(c) an einer ihrer beiden größten Flächen, gegebenenfalls gemäß Figur 2(d) auch an den vier Seitenflächen mit einer Schicht 2 aus Wasserglas überzogen. Anschließend wird die mit der Wasserglas-Schicht 2 überzogene größe Fläche der Getterpille 1 gemäß Figur 2(e) mit Klebstoff 4 beschichtet, der zur Befestigung der Getterpille an einer Wand oder einem sonstigen Strukturelement der Schaltkammer dient.In the context of rational production, according to FIG. 2 (a), a plate 5 made of getter material is preferably used, which is provided with groove-like depressions 6 that run orthogonally to one another in such a way that these depressions 6 predetermined breaking points for creating individual getter pills 1 (FIG. 2 (b)) ) form. The individual getter pills 1 are then covered in accordance with FIG. 2 (c) on one of their two largest surfaces, optionally in accordance with FIG. 2 (d) on the four side surfaces, with a layer 2 of water glass. Then the large surface of the getter pill 1 covered with the water glass layer 2 according to FIG. 2 (e) is coated with adhesive 4, which is used to fasten the getter pill to a wall or another structural element of the switching chamber.

Claims (9)

1. Von der Umgebung abgedichtete Schaltkammer, in der elektrische Kontakte sowie wenigstens ein poröser Getter untergebracht sind, wobei als Getterstoff eine Substanz verwendet ist, die bezüglich Stoffen, die auf den Kontakten Fremdschichten bilden, adsorptiv wirkt, dadurch gekennzeichnet daß die Poren des Getterstoffes überwiegend größer ist als 3 nm und kleiner als 100 nm sind und daß der Mittelwert der Porendurchmesser im Bereich von etwa 7 - 20 nm liegt.1. Switching chamber sealed from the environment, in which electrical contacts and at least one porous getter are accommodated, a substance being used as the getter substance, which has an adsorptive effect on substances which form foreign layers on the contacts, characterized in that the pores of the getter substance predominantly is larger than 3 nm and smaller than 100 nm and that the mean value of the pore diameter is in the range of about 7-20 nm. 2. Schaltkammer nach Anspruch 1, dadurch gekennzeichnet , daß sie mit einem Schutzgas von derartigem Feuchtigkeitsgehalt gefüllt wird, daß sich durch Einwirkung des Getterstoffes eine relative Luftfeuchtigkeit von nicht weniger als 5% und nicht mehr als 40% einstellt.2. Switching chamber according to claim 1, characterized in that it is filled with a protective gas of such a moisture content that a relative air humidity of not less than 5% and not more than 40% is established by the action of the getter material. 3. Schaltkammer nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß der Getterstoff im wesentlichen aus mit organischem Bindemittel versetztem Aluminiumoxid (Al2O3) besteht.3. Switching chamber according to claim 1 or 2, characterized in that the getter substance consists essentially of aluminum oxide mixed with organic binder (Al 2 O 3 ). 4. Schaltkammer nach Anspruch 1 bis 3, dadurch gekennzeichnet , daß der Getter (1) unter Einfügung einer als Diffusionsbarriere wirkenden Schicht (2) aus Wasserglas (z.B. Na2SiO3, K2SiO3) an der Innenwand der Schaltkammer angeklebt ist.4. Switching chamber according to claim 1 to 3, characterized in that the getter (1) is glued to the inner wall of the switching chamber with the insertion of a layer (2) acting as a diffusion barrier made of water glass (eg Na 2 SiO 3 , K 2 SiO 3 ). 5. Schaltkammer nach Anspruch 1 bis 4, dadurch gekennzeichnet daß zwischen den Kontakten und dem Getterstoff ein Temperaturgefälle besteht, derart, daß der Getterstoff in der Regel kühler als die Kontakte ist.5. Switching chamber according to claim 1 to 4, characterized in that between the contacts and the getter There is a temperature gradient such that the getter material is usually cooler than the contacts. 6. Schaltkammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet daß sie wenigstens einen Wandabschnitt besitzt, der durch die Innenseite einer metallischen Gehäusekappe (17) gebildet ist, und daß der Getter (1) an diesem metallischen Wandabschnitt fixiert.ist.6. Switching chamber according to one of the preceding claims, characterized in that it has at least one wall section which is formed by the inside of a metallic housing cap (17), and that the getter (1) is fixed to this metallic wall section. 7. Schaltkammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet daß der Getterstoff plattenförmig (5) und derart mit orthogonal zueinander verlaufenden rinnenartigen Vertiefungen (6) versehen ist, daß diese Vertiefungen Sollbruchstellen zur Schaffung mehrerer Getterpillen (1) darstellen.7. Switching chamber according to one of the preceding claims, characterized in that the getter material is plate-shaped (5) and provided with mutually orthogonal groove-like depressions (6) that these depressions represent predetermined breaking points for creating several getter pills (1). 8. Schaltkammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet daß die räumliche Größe des Getters unter Berücksichtigung seiner Getterwirkung und des Volumens der Schaltkammer so gewählt ist, daß eine nennenswerte Druckabsenkung in der Schaltkammer ausgeschlossen ist.8. Switching chamber according to one of the preceding claims, characterized in that the spatial size of the getter is selected taking into account its gettering effect and the volume of the switching chamber so that a significant reduction in pressure in the switching chamber is excluded. 9. Schaltkammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet daß der Getterstoff bei einer Temperatur von mindestens 100°C und einem Unterdruck von ca. 10-8 bar aktivierbar ist.9. Switching chamber according to one of the preceding claims, characterized in that the getter material can be activated at a temperature of at least 100 ° C and a negative pressure of approximately 10 -8 bar.
EP82102182A 1981-03-31 1982-03-17 Switch chamber for electric contacts sealed from the environment Expired - Lifetime EP0061655B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102182T ATE22749T1 (en) 1981-03-31 1982-03-17 ENVIRONMENTALLY SEALED ELECTRICAL CONTACT SWITCHING CHAMBER.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP56048766A JPS57162644A (en) 1981-03-31 1981-03-31 Gas adsorbent
JP48766/81 1981-03-31
DE3200392 1982-01-08
DE3200392A DE3200392C2 (en) 1981-03-31 1982-01-08 Hermetically sealed switching chamber for electromagnetic relays

Publications (4)

Publication Number Publication Date
EP0061655A2 true EP0061655A2 (en) 1982-10-06
EP0061655A3 EP0061655A3 (en) 1983-04-27
EP0061655B1 EP0061655B1 (en) 1986-10-08
EP0061655B2 EP0061655B2 (en) 1990-03-28

Family

ID=25798806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102182A Expired - Lifetime EP0061655B2 (en) 1981-03-31 1982-03-17 Switch chamber for electric contacts sealed from the environment

Country Status (3)

Country Link
US (1) US4430537A (en)
EP (1) EP0061655B2 (en)
CA (1) CA1179311A (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP0843328A2 (en) * 1996-11-18 1998-05-20 Nec Corporation Switching apparatus and activation suppression method for electric contact

Families Citing this family (7)

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AUPQ230499A0 (en) * 1999-08-18 1999-09-09 University Of Sydney, The Evacuated glass panel with getter and method of construction thereof
KR101017608B1 (en) * 2005-02-17 2011-02-28 세스 게터스 에스.피.에이 Flexible multi-layered getter
JP4327747B2 (en) * 2005-02-21 2009-09-09 双葉電子工業株式会社 Electronic device having non-evaporable getter and method for manufacturing the electronic device
ES2378198B1 (en) * 2010-07-19 2012-12-28 Abengoa Solar New Technologies S.A. NEW NON-EVAPORABLE GETTER DISPOSITION FOR SOLAR COLLECTOR TUBE.
US9416581B2 (en) 2012-07-31 2016-08-16 Guardian Industries Corp. Vacuum insulated glass (VIG) window unit including hybrid getter and making same
US9388628B2 (en) * 2012-07-31 2016-07-12 Guardian Industries Corp. Vacuum insulated glass (VIG) window unit with getter structure and method of making same
EP3462472B1 (en) 2017-09-29 2022-04-20 Tyco Electronics Componentes Electromecânicos Lda Seal housing for an electrical device and sealed relay using the seal housing

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US2295694A (en) * 1941-06-19 1942-09-15 Westinghouse Electric & Mfg Co Water vapor getter
FR1109644A (en) * 1954-08-09 1956-01-31 Philips Nv Stop Layer Electrode System
US3124671A (en) * 1964-03-10 Jgjtg
FR1482981A (en) * 1966-04-19 1967-06-02 Pechiney Saint Gobain Porous materials in agglomerated alumina
GB1269273A (en) * 1969-06-06 1972-04-06 Exxon Research Engineering Co Preparation of crystalline alumina by homogenous precipitation
DE2320618A1 (en) * 1973-04-24 1974-11-21 Deutsche Fernsprecher Gmbh HERMETICALLY SEALED RELAY
FR2464012A1 (en) * 1979-08-17 1981-02-27 Siemens Ag Recessed housing in relay or contact block for viscous liquid - has narrow deep housing for getter material in main contact block or relay protective housing

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US3124671A (en) * 1964-03-10 Jgjtg
US2295694A (en) * 1941-06-19 1942-09-15 Westinghouse Electric & Mfg Co Water vapor getter
FR1109644A (en) * 1954-08-09 1956-01-31 Philips Nv Stop Layer Electrode System
FR1482981A (en) * 1966-04-19 1967-06-02 Pechiney Saint Gobain Porous materials in agglomerated alumina
GB1269273A (en) * 1969-06-06 1972-04-06 Exxon Research Engineering Co Preparation of crystalline alumina by homogenous precipitation
DE2320618A1 (en) * 1973-04-24 1974-11-21 Deutsche Fernsprecher Gmbh HERMETICALLY SEALED RELAY
FR2464012A1 (en) * 1979-08-17 1981-02-27 Siemens Ag Recessed housing in relay or contact block for viscous liquid - has narrow deep housing for getter material in main contact block or relay protective housing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843328A2 (en) * 1996-11-18 1998-05-20 Nec Corporation Switching apparatus and activation suppression method for electric contact
EP0843328A3 (en) * 1996-11-18 1998-12-16 Nec Corporation Switching apparatus and activation suppression method for electric contact
US5936217A (en) * 1996-11-18 1999-08-10 Nec Corporation Switching apparatus and activation suppression method for electric contact

Also Published As

Publication number Publication date
EP0061655A3 (en) 1983-04-27
US4430537A (en) 1984-02-07
EP0061655B2 (en) 1990-03-28
EP0061655B1 (en) 1986-10-08
CA1179311A (en) 1984-12-11

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