EP1273020B1 - Electrical switchgear - Google Patents

Electrical switchgear Download PDF

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Publication number
EP1273020B1
EP1273020B1 EP01935944A EP01935944A EP1273020B1 EP 1273020 B1 EP1273020 B1 EP 1273020B1 EP 01935944 A EP01935944 A EP 01935944A EP 01935944 A EP01935944 A EP 01935944A EP 1273020 B1 EP1273020 B1 EP 1273020B1
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EP
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Prior art keywords
recess
cone
contact
control element
recesses
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EP01935944A
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German (de)
French (fr)
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EP1273020A1 (en
Inventor
Udo Stenzel
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Thermostat- und Schaltgeratebau & Co KG GmbH
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Thermostat- und Schaltgeratebau & Co KG GmbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element

Definitions

  • the invention relates to an electrical switching device, in particular in the form of a temperature controller, temperature limiter or the like.
  • Such switching devices essentially consist of a switching contact device with a fixed contact and a moving contact.
  • an actuating element is present in order to move the moving contact of the switching contact device from a closed position to an open position and vice versa.
  • the coupling of the moving contact to the movement of the actuating element is effected by a transmission element, which may be formed, for example, as a transmission pin.
  • the transmission element has a cone on at least one end, which is arranged in a recess of a spring element connected to the movement contact and / or in the control element. All said parts are arranged on a fastening device.
  • Such an electrical switching device is for example off DE 37 35 334 known.
  • this known switching device extend an elongated bimetallic strip and a snap spring to which the moving contact is mounted substantially parallel. If both parts carry out a coupled pivoting movement, a parallelogram-like displacement takes place between the actuating element, the spring element and the pin-like transmission element. This results in a tilting movement of the conical ends of the transmission element in their associated recesses, which is associated with a considerable friction of the cones in the recesses.
  • a temperature control switch which has a transmission element arranged between a bimetal strip and a contact spring, which is cone-shaped at its two ends.
  • the recess on the bimetallic plate for receiving the cone-shaped end of the transmission element is circular, which is also connected to a friction of the cone-shaped end in the recess.
  • the resulting thermal motor protection device has a transmission pin which passes through a movable contact part.
  • the opening provided in the contact part has a square geometry.
  • the transfer pin is firmly fixed in the square opening.
  • the invention has for its object to improve the switching behavior of such switching devices. This object is solved by the characterizing features of claim 1. Advantageous developments of the invention will become apparent from the dependent claims.
  • the cone or the cones of the transmission element receiving recess or recesses to be dimensioned so that they in Abstehcardi of the actuating element or the Spring element of the fastening device is greater than / are perpendicular to the Abstehraum.
  • the round or in tilted position relevant slightly elliptical cone cross section is no longer at a circular edge of the recess, but it comes advantageously to a selective attachment of the conical side surfaces on the side edges of the recess formed as a slot, ellipse or rectangular hole so that friction between the conical surfaces and the edges of the recesses receiving the cones when passing through a tilting movement between the transmission element and the actuating element or spring element are prevented.
  • the storage of the cones in the recesses is comparable to an axle pivot bearing, wherein the pivot axis extends through the two loading points between the conical surfaces and the side edges of the recesses.
  • the recesses may be formed either as a slot, as well as rectangular holes or elliptical recesses in question.
  • the substantially opposite point-like action on the side edges of the elongated holes through the conical surfaces can advantageously be designed to be slippery, ie the application can be made to escape along the side edges if surface parts of the conical surfaces formed at right angles thereto but should start at relatively strong tilt between actuator and transmission element at the ends of the slots.
  • the transmission element will look in the slot after a first switching cycle usually a central position, which is largely frictionless.
  • the transmission element will prefer the widest point of the ellipse as a bearing point due to the force acting between it and the side edges of the recesses spring force. If it then comes to a tilting movement between the actuating element and transmission element, then the cones roll as it were on the side edges of the elliptical recess, which is also connected only with very little friction.
  • the electrical switching device 1 shown in the drawing figures 1 and 2 comprises a switching contact device 2 consisting of a fixed contact 3 and a moving contact 4 which is fixed to a contact spring 5.
  • an adjusting element 6 is provided in the form of a bimetallic strip 7, the pivot end 8 is movably coupled to the free end 9 of the contact spring 5 via a transmission element 10.
  • the transmission element 10 is in the illustrated embodiment, a transmission pin having cones 11, 11 'at both ends, which are arranged in recesses 12, 12' of the bimetallic strip 7 and the contact spring 5.
  • Fig. 1 and Fig. 2 still a fastening means 13 of superimposed insulating, to which the fixed ends of the contact spring 5 and the bimetallic strip 7 and the fixed contact 3, terminal contacts 14, and a support arm 15 are fixed for an adjusting device 16.
  • Fig. 3 now shows the conditions in the cone bearing area, as prevail in the prior art.
  • Fig. 3a shows a plan view of the bimetallic strip 7.
  • the recess 12, which receives the cone 11 is round. This means that the two visible in Figure 3b edges 20 act on the surfaces of the cone 11 and cause friction as soon as the pivot angle increases ⁇ .
  • the recess is formed as a rectangular recess, a round cone 11 will therefore act on only the side edges 25 of the recess 12, the longitudinal edges 26, however, remain free.
  • Invention-bearing is the feature that the recess 12 in the longitudinal direction 27 of the bimetallic strip. 7 is larger than in the transverse direction.
  • recesses 12, 12 'come in the form of a slot or an ellipse in question.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Control Of Electric Motors In General (AREA)
  • Relay Circuits (AREA)

Abstract

The invention relates to an electrical switchgear (1), especially a temperature controller, temperature limiter or the like, consisting essentially of a switch contact device (2) comprising a stationary (3) and a movable contact element (4), and of an adjusting element (6) for transferring the movable contact element (4) of the switch contact device (2) from a closed position to an open position and vice versa. The inventive switchgear further comprises a transmission element (10) having a cone (11, 11') on at least one end thereof that is disposed in a recess (12, 12') of a spring element linked with the movable contact element (4) and/or of the adjusting element (6), and a fastening device (13) on which the stationary contact element (3), the spring element, and the adjusting element (6) are fastened. The dimension(s) of the recess (12) or the recesses (12') accommodating the cone (11) or the cones (11, 11') is/are larger in the direction of projection of the adjusting element (6) or of the spring element from the fastening device (13) than perpendicularly to the direction of projection.

Description

Die Erfindung betrifft eine elektrische Schaltvorrichtung insbesondere in Form eines Temperaturreglers, Temperaturbegrenzers oder dgl..The invention relates to an electrical switching device, in particular in the form of a temperature controller, temperature limiter or the like.

Derartige Schaltvorrichtungen bestehen im wesentlichen aus einer Schaltkontakteinrichtung mit einem Festkontakt und einem Bewegungskontakt. Um den Bewegungskontakt der Schaltkontakteinrichtung von einer Schließstellung in eine Öffnungsstellung und umgekehrt zu bewegen, ist ein Stellelement vorhanden. Die Kopplung des Bewegungskontaktes an die Bewegung des Stellelementes erfolgt durch ein Übertragungselement, das beispielsweise als Übertragungsstift ausgebildet sein kann. Das Übertragungselement weist an mindestens einem Ende einen Konus auf, der in einer Ausnehmung eines mit dem Bewegungskontakt verbundenen Federelementes und/oder im Stellelement angeordnet ist. Alle genannten Teile sind an einer Befestigungseinrichtung angeordnet.Such switching devices essentially consist of a switching contact device with a fixed contact and a moving contact. In order to move the moving contact of the switching contact device from a closed position to an open position and vice versa, an actuating element is present. The coupling of the moving contact to the movement of the actuating element is effected by a transmission element, which may be formed, for example, as a transmission pin. The transmission element has a cone on at least one end, which is arranged in a recess of a spring element connected to the movement contact and / or in the control element. All said parts are arranged on a fastening device.

Eine derartige elektrische Schalteinrichtung ist beispielsweise aus DE 37 35 334 bekannt. Bei dieser bekannten Schaltvorrichtung verlaufen ein langgestreckter Bimetallstreifen und eine Schnappfeder, an der der Bewegungskontakt befestigt ist im wesentlichen parallel. Vollführen beide Teile eine gekoppelte Schwenkbewegung, so erfolgt eine parallelogrammartige Verschiebung zwischen dem Betätigungselement, dem Federelement und dem stiftartigen Übertragungselement. Dabei kommt es zu einer kippenden Bewegung der konischen Enden des Übertragungselementes in den ihnen zugeordneten Ausnehmungen, was mit einer nicht unerheblichen Reibung der Konen in den Ausnehmungen verbunden ist.Such an electrical switching device is for example off DE 37 35 334 known. In this known switching device extend an elongated bimetallic strip and a snap spring to which the moving contact is mounted substantially parallel. If both parts carry out a coupled pivoting movement, a parallelogram-like displacement takes place between the actuating element, the spring element and the pin-like transmission element. This results in a tilting movement of the conical ends of the transmission element in their associated recesses, which is associated with a considerable friction of the cones in the recesses.

Derartige Reibungen haben sich als nachteilig für die Schaltfunktion und insbesondere die Schaltdifferenz solcher Schaltvorrichtungen herausgestellt.Such friction has been found to be detrimental to the switching function and in particular the switching differential of such switching devices.

Ebenso geht aus DE 82 15 108 U1 ein Temperaturreglerschalter hervor, der ein zwischen einem Bimetallstreifen und einer Kontaktfeder angeordnetes Übertragungselement aufweist, das an seinen beiden Enden konusförmig ausgebildet ist. Die Ausnehmung an der Bimetallplatte zur Aufnahme des konusförmigen Endes des Übertragungselementes ist kreisförmig ausgebildet, was ebenfalls mit einer Reibung des konusförmigen Endes in der Ausnehmung verbunden ist.Likewise goes out DE 82 15 108 U1 a temperature control switch, which has a transmission element arranged between a bimetal strip and a contact spring, which is cone-shaped at its two ends. The recess on the bimetallic plate for receiving the cone-shaped end of the transmission element is circular, which is also connected to a friction of the cone-shaped end in the recess.

Die aus US 51 21 095 A hervorgehende thermische Motorschutzvorrichtung weist einen Übertragungsstift auf, der ein bewegliches Kontaktteil durchsetzt. Die dafür vorgesehene Öffnung im Kontaktteil weist eine quadratische Geometrie auf. Der Übertragungsstift ist in der quadratischen Öffnung fest fixiert.From US 51 21 095 A The resulting thermal motor protection device has a transmission pin which passes through a movable contact part. The opening provided in the contact part has a square geometry. The transfer pin is firmly fixed in the square opening.

Es ist bereits auch angedacht worden, zur Minimierung der Reibung anstelle der Konen schneidenartige Enden des Übertragungselementes vorzusehen und diese in entsprechend geformten Ausnehmungen zu lagern. Dies bedeutet aber, daß das Übertragungselement bei der Montage um seine Längsachse ausgerichtet werden muß, was die Montage verteuert.It has also been considered to provide cutting edges of the transmission element to minimize friction instead of the cones and to store them in correspondingly shaped recesses. However, this means that the transmission element must be aligned during assembly about its longitudinal axis, which makes the assembly more expensive.

Der Erfindung liegt die Aufgabe zugrunde, das Schaltverhalten derartiger Schaltvorrichtungen zu verbessern. Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.The invention has for its object to improve the switching behavior of such switching devices. This object is solved by the characterizing features of claim 1. Advantageous developments of the invention will become apparent from the dependent claims.

Als Kern der Erfindung wird es angesehen, die den Konus oder die Konen des Übertragungselementes aufnehmende Ausnehmung bzw. Ausnehmungen so zu dimensionieren, daß sie in Abstehrichtung des Stellelementes bzw. des Federelementes von der Befestigungseinrichtung größer ist/sind als rechtwinklig zur Abstehrichtung.As the core of the invention, it is considered that the cone or the cones of the transmission element receiving recess or recesses to be dimensioned so that they in Abstehrichtung of the actuating element or the Spring element of the fastening device is greater than / are perpendicular to the Abstehrichtung.

Dadurch liegt der runde oder in verkippter Stellung relevante leicht elliptische Konusquerschnitt nicht mehr an einer kreisförmigen Kante der Ausnehmung an, vielmehr kommt es vorteilhafter Weise zu einer punktuellen Anlagerung der Konusseitenflächen auf den Seitenkanten der als Langloch, Ellipse oder Rechteckloch ausgebildeten Ausnehmungen, so daß Reibungen zwischen den Konusflächen und den Kanten der die Konen aufnehmenden Ausnehmungen beim Durchlaufen einer Kippbewegung zwischen Übertragungselement und Betätigungselement bzw. Federelement unterbunden werden. Die Lagerung der Konen in den Ausnehmungen ist vergleichbar mit einer Achs- Schwenklagerung, wobei die Schwenkachse durch die beiden Beaufschlagungspunkte zwischen den Konusflächen und den Seitenkanten der Ausnehmungen verläuft.As a result, the round or in tilted position relevant slightly elliptical cone cross section is no longer at a circular edge of the recess, but it comes advantageously to a selective attachment of the conical side surfaces on the side edges of the recess formed as a slot, ellipse or rectangular hole so that friction between the conical surfaces and the edges of the recesses receiving the cones when passing through a tilting movement between the transmission element and the actuating element or spring element are prevented. The storage of the cones in the recesses is comparable to an axle pivot bearing, wherein the pivot axis extends through the two loading points between the conical surfaces and the side edges of the recesses.

Die Ausnehmungen können entweder als Langloch ausgebildet sein, ebenso kommen Rechtecklöcher oder elliptische Ausnehmungen in Frage.The recesses may be formed either as a slot, as well as rectangular holes or elliptical recesses in question.

Wird die Differenz zwischen der jeweiligen Dimensionierung entlang den Längs- und Querachsen der Ausnehmungen bzw. bei einem Rechteckloch die Differenz zwischen Länge und Breite der Ausnehmung größer bemessen als eine mögliche Fertigungstoleranzabweichung des oder der Konen des Übertragungselementes vom Kreisquerschnitt, ist sichergestellt, daß derartige Fertigungstoleranzabweichungen den angestrebten reibungsreduzierenden Effekt durch die Langlöcher nicht zunichte machen.If the difference between the respective dimensions along the longitudinal and transverse axes of the recesses or in a rectangular hole, the difference between the length and width of the recess sized larger than a possible manufacturing tolerance deviation of the cone or of the transmission element of the circular cross-section, it is ensured that such manufacturing tolerances desired friction-reducing effect through the oblong holes do not destroy.

Die sich im wesentlichen gegenüberliegende punktartige Beaufschlagung der Seitenkanten der Langlöcher durch die Konenflächen kann mit Vorteil gleitend ausgebildet sein, d. h. die Beaufschlagung kann entlang der Seitenkanten ausweichen, falls rechtwinkelig dazu ausgebildete Flächenteile der Konenflächen doch einmal bei relativ starker Verkippung zwischen Stellelement und Übertragungselement an die Enden der Langlöcher anlaufen sollten. Das Übertragungselement wird sich dabei im Langloch nach einem ersten Schaltzyklus in der Regel eine mittige Position suchen, die weitgehend reibungsfrei ist.The substantially opposite point-like action on the side edges of the elongated holes through the conical surfaces can advantageously be designed to be slippery, ie the application can be made to escape along the side edges if surface parts of the conical surfaces formed at right angles thereto but should start at relatively strong tilt between actuator and transmission element at the ends of the slots. The transmission element will look in the slot after a first switching cycle usually a central position, which is largely frictionless.

Wird die Ausnehmung elliptisch ausgebildet, so wird das Übertragungselement aufgrund der zwischen ihm und den Seitenkanten der Ausnehmungen wirkenden Federkraft die breiteste Stelle der Ellipse als Lagerpunkt bevorzugen. Kommt es dann zu einer Kippbewegung zwischen Betätigungselement und Übertragungselement, dann rollen die Konenflächen gleichsam auf den Seitenkanten der elliptischen Ausnehmung ab, was ebenfalls nur mit sehr geringen Reibungen verbunden ist.If the recess is elliptical, then the transmission element will prefer the widest point of the ellipse as a bearing point due to the force acting between it and the side edges of the recesses spring force. If it then comes to a tilting movement between the actuating element and transmission element, then the cones roll as it were on the side edges of the elliptical recess, which is also connected only with very little friction.

Die Erfindung ist anhand eines Ausführungsbeispiels in den Zeichnungsfiguren näher erläutert. Diese zeigen:

Fig. 1:
eine schematische Seitendarstellung einer elektrischen Schaltvorrichtung mit einem Bimetallstreifen in gestreckter Stellung (Schaltkontakt geschlossen);
Fig. 2:
eine schematische Seitendarstellung gemäß Fig. 1 mit einem Bimetallstreifen in gebogener Stellung (Schaltkontakt geöffnet);
Fig.3:
eine schematische Darstellung der Konus-Lagerverhältnisse beim Stand der Technik;
Fig. 4:
eine schematische Darstellung der Konus-Längenverhältnisse gemäß der Erfindung.
The invention is explained in more detail with reference to an embodiment in the drawing figures. These show:
Fig. 1:
a schematic side view of an electrical switching device with a bimetal strip in the extended position (switch contact closed);
Fig. 2:
a schematic side view of Figure 1 with a bimetal strip in the bent position (switching contact open).
Figure 3:
a schematic representation of the cone bearing conditions in the prior art;
4:
a schematic representation of the cone aspect ratios according to the invention.

Die in den Zeichnungsfiguren 1 und 2 dargestellte elektrische Schaltvorrichtung 1 umfaßt eine Schaltkontakteinrichtung 2 bestehend aus einem Festkontakt 3 und einem Bewegungskontakt 4, der an einer Kontaktfeder 5 befestigt ist.The electrical switching device 1 shown in the drawing figures 1 and 2 comprises a switching contact device 2 consisting of a fixed contact 3 and a moving contact 4 which is fixed to a contact spring 5.

Um die Kontaktfeder 5 zu verschwenken und dadurch die Schaltkontakteinrichtung 2 zu öffnen und zu schließen, ist ein Stellelement 6 in Form eines Bimetallstreifens 7 vorgesehen, dessen Schwenkende 8 mit dem freien Ende 9 der Kontaktfeder 5 über ein Übertragungselement 10 bewegungsgekoppelt ist. Das Übertragungselement 10 ist beim dargestellten Ausführungsbeispiel ein Übertragungsstift, der an beiden Enden Konen 11, 11' aufweist, die in Ausnehmungen 12, 12' des Bimetallstreifens 7 bzw. der Kontaktfeder 5 angeordnet sind.In order to pivot the contact spring 5 and thereby open and close the switching contact device 2, an adjusting element 6 is provided in the form of a bimetallic strip 7, the pivot end 8 is movably coupled to the free end 9 of the contact spring 5 via a transmission element 10. The transmission element 10 is in the illustrated embodiment, a transmission pin having cones 11, 11 'at both ends, which are arranged in recesses 12, 12' of the bimetallic strip 7 and the contact spring 5.

Darüber hinaus zeigen Fig. 1 und Fig. 2 noch eine Befestigungseinrichtung 13 aus übereinandergelegten Isolierscheiben, an der die Festenden der Kontaktfeder 5 und des Bimetallstreifens 7 sowie der Festkontakt 3, Anschlußkontakte 14, und ein Haltearm 15 für eine Einstellvorrichtung 16 befestigt sind.In addition, Fig. 1 and Fig. 2 still a fastening means 13 of superimposed insulating, to which the fixed ends of the contact spring 5 and the bimetallic strip 7 and the fixed contact 3, terminal contacts 14, and a support arm 15 are fixed for an adjusting device 16.

Fig. 3 zeigt nun die Verhältnisse im Konuslagerbereich, wie sie beim Stand der Technik vorherrschen. Fig. 3a zeigt eine Draufsicht auf den Bimetallstreifen 7. Die Ausnehmung 12, die den Konus 11 aufnimmt, ist rund. Dies bedeutet, daß die beiden in Figur 3b sichtbaren Kanten 20 in die Flächen des Konus 11 beaufschlagen und Reibungen verursachen, sobald sich der Schwenkwinkel α vergrößert.Fig. 3 now shows the conditions in the cone bearing area, as prevail in the prior art. Fig. 3a shows a plan view of the bimetallic strip 7. The recess 12, which receives the cone 11 is round. This means that the two visible in Figure 3b edges 20 act on the surfaces of the cone 11 and cause friction as soon as the pivot angle increases α.

Bei dem in Zeichnungsfigur 4 dargestellten Ausführungsbeispiel der Erfindung ist die Ausnehmung als Rechteckausnehmung ausgebildet, ein runder Konus 11 wird demnach nur die Seitenkanten 25 der Ausnehmung 12 beaufschlagen, die Längskanten 26 hingegen bleiben frei. Erfindungstragend ist das Merkmal, daß die Ausnehmung 12 in Längserstreckungsrichtung 27 des Bimetallstreifens 7 größer bemessen ist als in Querrichtung dazu. Neben einer Ausbildung als Rechteckloch, wie dies in Fig. 4 dargestellt ist, kommen auch Ausnehmungen 12, 12' in Form eines Langloches oder einer Ellipse in Frage.In the embodiment of the invention shown in drawing figure 4, the recess is formed as a rectangular recess, a round cone 11 will therefore act on only the side edges 25 of the recess 12, the longitudinal edges 26, however, remain free. Invention-bearing is the feature that the recess 12 in the longitudinal direction 27 of the bimetallic strip. 7 is larger than in the transverse direction. In addition to a design as a rectangular hole, as shown in Fig. 4, also recesses 12, 12 'come in the form of a slot or an ellipse in question.

Das Verhältnis von Länge D zu Breite d der Ausnehmung 12, 12' bzw. das Verhältnis der jeweiligen Dimensionierung von Längs- D und Querachse d einer elliptischen Ausnehmung oder eines Langloches genügt etwa der Formel D = d cos α

Figure imgb0001

wobei α der Winkel ist, der die Längsachse der Konen 11, 11' von dem Lot auf die durch die Ausnehmung aufgespannte Fläche abweicht, wenn der Bimetallstreifen 7 auslenkt.The ratio of length D to width d of the recess 12, 12 'or the ratio of the respective dimensioning of longitudinal D and transverse axis d of an elliptical recess or an elongated hole satisfies approximately the formula D = d cos α
Figure imgb0001
where α is the angle that deviates the longitudinal axis of the cones 11, 11 'from the solder to the surface spanned by the recess when the bimetallic strip 7 deflects.

Claims (11)

  1. Electrical switchgear apparatus (1), more especially a temperature regulator or a temperature limiter, having
    - a switching contact mechanism (2), which includes a fixed contact (3) and a moving contact (4),
    - a control element (6) for transferring the moving contact (4) of the switching contact mechanism (2) from a closed position into an open position and vice versa,
    - a transmitting element (10), which includes a cone (11, 11') at at least one end and which is disposed in a recess (12, 12') of a resilient element (5) connected to the moving contact (4) and/or of the control element (6), and
    - a securing mechanism (13), on which the fixed contact (3), the resilient element and the control element (6) are secured,
    characterised in that the recess (12, 12'), which accommodates the cone (11, 11'), is so dimensioned that it is larger, when viewed with respect to the protruding direction of the control element (6) or of the resilient element (5) from the securing mechanism (13), than when viewed at right angles to the protruding direction.
  2. Apparatus according to claim 1, characterised in that the control element (6) is in the form of a bimetallic strip (7) known per se, which is disposed with its securing end on the securing mechanism (13) and is provided, at its pivotal end (8), with the recess which accommodates the cone (11) of the transmitting element (10).
  3. Apparatus according to claim 2, characterised in that the resilient element (5), which co-operates with the moving contact (4), is in the form of an elongate contact spring which, at its pivotable free end (9), is connected to the pivotal end (8) of the bimetallic strip (7) and is provided with a recess (12') for the accommodation of a cone (11') of the transmitting element (10).
  4. Apparatus according to one of the preceding claims 1 - 3, characterised in that the recess (12, 12') in the control element (6) and/or in the resilient element (5) is in the form of an elongate slot.
  5. Apparatus according to one of the preceding claims 1 - 3, characterised in that the recesses (12, 12') are in the form of a rectangular slot.
  6. Apparatus according to one of the preceding claims 1 - 3, characterised in that the recesses (12, 12') are in the form of an ellipse.
  7. Apparatus according to one of the preceding claims, characterised in that the difference between the dimensions of the recess (12, 12') along the longitudinal axis and the dimensions of the recess (12, 12') along the transverse axis of the recess (12, 12') or respectively, in the case of a rectangular slot, the difference between length D and width d of the recess (12, 12') is greater than a possible deviation in the manufacturing tolerance of the cone or cones (11, 11') of the transmitting element (10) from the circular cross-section.
  8. Apparatus according to one of the preceding claims, characterised in that the cone faces cover the lateral edges (25) of the recess (12, 12') in a substantially punctiform manner.
  9. Apparatus according to one of the preceding claims, characterised in that the substantially opposed, punctiform covering of the lateral edges (25) of the recess (12, 12') by the cone faces is designed to slide along the lateral edges.
  10. Apparatus according to one of the preceding claims, characterised in that the lateral edges (25) of the recess (12, 12') are in the form of sliding edges, more especially they are smooth.
  11. Apparatus according to one of the preceding claims, characterised in that the ratio of length D to width d of the recess (12, 12') or respectively the ratio between the dimensions along longitudinal axis D and transverse axis d of the recess conforms roughly to the formula D = d cos α
    Figure imgb0003
     when α is the angle of inclination between the face of the recess and the longitudinal axis of the transmitting element (10).
EP01935944A 2000-04-08 2001-04-04 Electrical switchgear Expired - Lifetime EP1273020B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10017592 2000-04-08
DE10017592A DE10017592C1 (en) 2000-04-08 2000-04-08 Electrical switching device
PCT/DE2001/001290 WO2001078098A1 (en) 2000-04-08 2001-04-04 Electrical switchgear

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EP1273020A1 EP1273020A1 (en) 2003-01-08
EP1273020B1 true EP1273020B1 (en) 2007-08-15

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EP (1) EP1273020B1 (en)
AT (1) ATE370512T1 (en)
CZ (1) CZ299264B6 (en)
DE (2) DE10017592C1 (en)
ES (1) ES2290135T3 (en)
PT (1) PT1273020E (en)
WO (1) WO2001078098A1 (en)

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CS251154B1 (en) * 1984-10-12 1987-06-11 Stanislav Kucera Electric bimetallic switch
DE3735334A1 (en) * 1987-10-19 1989-04-27 Thermostat & Schaltgeraetebau THERMALLY CONTROLLED ELECTRICAL SWITCHING DEVICE
JP2519560B2 (en) * 1990-02-14 1996-07-31 生方 眞哉 Thermal switch
ES1022926Y (en) * 1992-11-12 1994-04-16 Braun Ag THERMOSTAT FOR A HEATING SURFACE, PREFERRED AN IRON SOLE.
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Also Published As

Publication number Publication date
PT1273020E (en) 2007-09-04
WO2001078098A1 (en) 2001-10-18
ATE370512T1 (en) 2007-09-15
CZ299264B6 (en) 2008-05-28
ES2290135T3 (en) 2008-02-16
EP1273020A1 (en) 2003-01-08
DE50112864D1 (en) 2007-09-27
DE10017592C1 (en) 2001-11-15

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