EP0837485A2 - Safety device for position switch - Google Patents
Safety device for position switch Download PDFInfo
- Publication number
- EP0837485A2 EP0837485A2 EP97116825A EP97116825A EP0837485A2 EP 0837485 A2 EP0837485 A2 EP 0837485A2 EP 97116825 A EP97116825 A EP 97116825A EP 97116825 A EP97116825 A EP 97116825A EP 0837485 A2 EP0837485 A2 EP 0837485A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- elements
- safety device
- release
- sensor
- magnetic
- 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.)
- Ceased
Links
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
- H01H27/002—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings wherein one single insertion movement of a key comprises an unlocking stroke and a switch actuating stroke, e.g. security switch for safety guards
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
- H01H36/0006—Permanent magnet actuating reed switches
- H01H36/0046—Limit switches, also fail-safe operation or anti-tamper considerations
Definitions
- the present invention relates to a safety device for position switches or the like according to the preamble of claim 1.
- DE 43 03 367 C1 describes a safety switch consisting of a release mechanism and an actuator unlocking this mechanism.
- the release mechanism essentially consists of a roller mounted in a housing, which in turn consists of individual disks rotatably mounted on a shaft with radially open, cam-like recesses.
- the actuating member is essentially key-like and has individual actuating sections in adaptation to the recesses of the release mechanism, so that by inserting the actuating member into the release mechanism it can be unlocked accordingly and an electrical switching operation is thus triggered via the roller.
- Other mechanically coded safety switches are also known. Such a solution is also disclosed in DE 42 38 016 C2.
- a key-like actuating element is inserted into a housing opening of the release device, as a result of which a slide within the release device can be moved in the insertion direction after unlocking by the coded actuating element and, in the inserted position of the actuating element, a switching plunger of the switching device locks the actuating element against the insertion direction and also an electrical switching process is triggered.
- the present invention has for its object to provide a safety device for position switches or the like, which on the one hand ensures a significantly higher degree of coding and on the other hand almost precludes counterfeiting of the coded actuating elements and thus significantly increases the security against such devices.
- the object is achieved in that the actuating element and the release element are additionally electromagnetically coded in such a way that the release element has at least one sensor element which detects magnetic field changes and the actuating element has at least one magnetic element which generates a magnetic field, so that after mechanical and electromagnetic decoding has taken place an electrical switching process is released.
- the release element has several sensor elements and the actuating element has several magnetic elements.
- the sensor elements which are preferably in the form of Hall sensors, and the magnetic elements, in particular in the form of permanent magnets, are arranged, for example, in a two-row or multi-row matrix in such a way that in the operationally combined state of the release and actuating element, the sensor and magnet elements of which lie almost congruently one above the other. With a corresponding matrix arrangement of sensor and magnetic elements, an additional decoding signal then takes place, so that an electrical switching process is released after mechanical and electromagnetic decoding has taken place. Further advantages of the invention are contained in the subclaims and the following description of the figures.
- the only drawing figure shows a possible embodiment of the Safety device according to the invention in partial section in a Perspective view, the device being arranged on a position switch is.
- the safety device essentially consists of a key-like actuating element 2 and a release element 4 which serves to accommodate the actuating element 2.
- the actuating element 2 and the release element 4 are electromagnetically coded in addition to a mechanical coding such that the release element 4 has at least one magnetic field change has sensing element 6 and the actuating element 2 has at least one magnetic element 8 which generates a magnetic field.
- an electrical switching operation of a position switch 10 or the like connected to the safety device is only released after the safety device has been activated twice - after mechanical and electromagnetic decoding.
- the release element 4 also has six sensor elements 6 arranged in the same way.
- the sensor elements 6 and the magnetic elements 8 are arranged in such a way that in the operationally merged state of the release and actuating element 4, 2 they lie essentially congruently one above the other.
- the sensor elements 6 are designed as Hall sensors and the magnetic elements 8 as permanent magnets.
- electromagnetic decoding is additionally carried out by the sensor elements 6 of the release element 4 querying or detecting the arrangement of the magnetic elements 8 located on the actuating element 2 and comparing them with an existing reference image or pattern. If the reference image of the release element 4 and the magnetic element arrangement on the actuating element 2 match, the electromagnetic decoding takes place, so that an electrical switching operation of the position switch is released after successful mechanical and electromagnetic decryption.
- each of the sensor elements 6 is connected in particular to a comparator (not shown). A reference voltage is applied to one of the two comparator inputs of each comparator in such a way that the reference image is produced.
- each comparator is then connected to the signal output of a sensor element 6.
- the change in individual magnetic fields in the area of the sensor elements 6 is achieved and a type of voltage or signal matrix is generated. If this signal matrix matches the existing reference image, an enable signal is generated.
- the sensor elements 6 are further connected to a computing and storage unit (not shown) in such a way that, by the first operational merging of the actuating and releasing elements 2, 4, the arrangement of the magnetic elements 8 of the actuating element 2 corresponding reference pattern is stored and all future decoding processes take place on the basis of this created reference pattern.
- the present invention is not limited to the exemplary embodiment described, but also encompasses all embodiments having the same effect within the meaning of the invention.
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Lock And Its Accessories (AREA)
- Push-Button Switches (AREA)
- Switches With Compound Operations (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Sicherheitsvorrichtung für Positionsschalter oder dergleichen nach dem Oberbegriff des Anspruchs 1.The present invention relates to a safety device for position switches or the like according to the preamble of claim 1.
Es sind bereits derartige Vorrichtungen bekannt. Die DE 43 03 367 C1 beschreibt
einen Sicherheitsschalter bestehend aus einem Freigabemechanismus und einem
diesen Mechanismus entriegelnden Betätigungsorgan. Dabei besteht der
Freigabemechanismus im wesentlichen aus einer in einem Gehäuse gelagerten
Walze, die ihrerseits wiederum aus einzelnen, drehbar auf einer Welle gelagerten
Scheiben mit radial offenen, steuerkurvenartigen Ausnehmungen besteht. Das
Betätigungsorgan ist im wesentlichen schlüsselartig ausgebildet und weist in
Anpassung an die Ausnehmungen des Freigabemechanismus einzelne
Betätigungsabschnitte auf, so daß durch Einführen des Betätigungsorgans in den
Freigabemechanismus dieser entsprechend entsperrbar ist und somit über die
Walze ein elektrischer Schaltvorgang ausgelöst wird.
Es sind noch weitere mechanisch-kodierte Sicherheitsschalter bekannt. Auch in der
DE 42 38 016 C2 wird eine derartige Lösung offenbart. Hierbei wird ein
schlüsselartiges Betätigungselement in eine Gehäuseöffnung der
Freigabeeinrichtung eingeführt, wodurch dann ein Schlitten innerhalb der
Freigabeeinrichtung nach Entriegelung durch das kodierte Betätigungselement in
Einführrichtung bewegbar ist und in eingeführter Position des Betätigungselements
ein Schaltstößel des Schaltgeräts das Betätigungselement entgegen der
Einführrichtung verriegelt und ebenfalls ein elektrischer Schaltvorgang ausgelöst
wird.
Diese bekannten Lösungen haben alle gemein, daß die erzielte Sicherheit gegen
unbefugtes Schalten lediglich durch mehr oder minder einfache mechanische
Kodierung der Betätigungsorgane und der zugehörigen Freigabeeinrichtungen
erreicht wird. Die somit erzielte Sicherheit ist jedoch in vielen Fällen unzureichend,
da derartige mechanisch kodierte Betätigungsorgane im Fachhandel erhältlich oder
auch einfach nachzufertigen sind. In der Praxis hat sich gezeigt, daß derartige,
durch mechanische Kodierung realisierte Sicherheitseinrichtungen relativ einfach zu
überlisten sind. Genau das birgt jedoch ein hohes Gefahrenpotential, da
Sicherheitsvorrichtungen, wie Schutztüren, Abschirmgitter und -hauben, die mit Hilfe
derartiger Sicherheitsschalter abgesichert worden sind, umgangen werden können.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Sicherheitsvorrichtung
für Positionsschalter oder dergleichen zu schaffen, die einerseits einen deutlich
höheren Kodierungsgrad gewährleistet und andererseits ein Fälschen der kodierten
Betätigungselemente nahezu ausschließt und somit die Überlistungssicherheit
derartiger Vorrichtungen deutlich erhöht.Such devices are already known. DE 43 03 367 C1 describes a safety switch consisting of a release mechanism and an actuator unlocking this mechanism. The release mechanism essentially consists of a roller mounted in a housing, which in turn consists of individual disks rotatably mounted on a shaft with radially open, cam-like recesses. The actuating member is essentially key-like and has individual actuating sections in adaptation to the recesses of the release mechanism, so that by inserting the actuating member into the release mechanism it can be unlocked accordingly and an electrical switching operation is thus triggered via the roller.
Other mechanically coded safety switches are also known. Such a solution is also disclosed in DE 42 38 016 C2. Here, a key-like actuating element is inserted into a housing opening of the release device, as a result of which a slide within the release device can be moved in the insertion direction after unlocking by the coded actuating element and, in the inserted position of the actuating element, a switching plunger of the switching device locks the actuating element against the insertion direction and also an electrical switching process is triggered.
These known solutions all have in common that the security achieved against unauthorized switching is achieved only by more or less simple mechanical coding of the actuators and the associated release devices. However, the security achieved in this way is inadequate in many cases, since such mechanically coded actuating elements are available from specialist dealers or can also be easily reproduced. In practice, it has been shown that such safety devices implemented by mechanical coding are relatively easy to outwit. However, this is precisely what poses a high risk potential, since safety devices, such as protective doors, shielding grids and hoods, which have been secured with the aid of such safety switches, can be avoided. The present invention has for its object to provide a safety device for position switches or the like, which on the one hand ensures a significantly higher degree of coding and on the other hand almost precludes counterfeiting of the coded actuating elements and thus significantly increases the security against such devices.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß das Betätigungselement
und das Freigabeelement zusätzlich elektromagnetisch kodiert sind derart, daß das
Freigabeelement mindestens ein, magnetische Feldänderungen erfassendes
Fühlerelement aufweist und das Betätigungselement mindestens ein, ein Magnetfeld
erzeugendes Magnetelement aufweist, so daß nach erfolgter mechanischer und
elektromagnetischer Dekodierung ein elektrischer Schaltvorgang freigegeben wird.
Erfindungsgemäß weist das Freigabeelement mehrere Fühlerelemente und das
Betätigungselement mehrere Magnetelemente auf. Dabei sind die, vorzugsweise als
Hallsensoren ausgebildeten Fühlerelemente und die insbesondere in Form von
Dauermagneten ausgebildeten Magnetelemente beispielsweise in einer zwei- oder
mehrreihigen Matrix derart angeordnet, daß im betriebsmäßig zusammengeführten
Zustand von Freigabe- und Betätigungselement, deren Fühler- und Magnetelemente
nahezu deckungsgleich übereinander liegen. Bei entsprechender Matrixanordnung
von Fühler- und Magnetelementen erfolgt dann ein zusätzliches
Dekodierungssignal, so daß nach erfolgter mechanischer und elektromagnetischer
Dekodierung ein elektrischer Schaltvorgang freigegeben wird.
Weitere Vorteile der Erfindung sind in den Unteransprüchen und der nachfolgenden
Figurenbeschreibung enthalten.According to the invention the object is achieved in that the actuating element and the release element are additionally electromagnetically coded in such a way that the release element has at least one sensor element which detects magnetic field changes and the actuating element has at least one magnetic element which generates a magnetic field, so that after mechanical and electromagnetic decoding has taken place an electrical switching process is released. According to the invention, the release element has several sensor elements and the actuating element has several magnetic elements. The sensor elements, which are preferably in the form of Hall sensors, and the magnetic elements, in particular in the form of permanent magnets, are arranged, for example, in a two-row or multi-row matrix in such a way that in the operationally combined state of the release and actuating element, the sensor and magnet elements of which lie almost congruently one above the other. With a corresponding matrix arrangement of sensor and magnetic elements, an additional decoding signal then takes place, so that an electrical switching process is released after mechanical and electromagnetic decoding has taken place.
Further advantages of the invention are contained in the subclaims and the following description of the figures.
Die einzige Zeichnungsfigur zeigt eine mögliche Ausführungsform der erfindungsgemäßen Sicherheitsvorrichtung im Teilschnitt in einer Perspektivdarstellung, wobei die Vorrichtung an einem Positionsschalter angeordnet ist.The only drawing figure shows a possible embodiment of the Safety device according to the invention in partial section in a Perspective view, the device being arranged on a position switch is.
In der Zeichnung ist die erfindungsgemäße Sicherheitsvorrichtung in einem
Teilschnitt in einer Perspektivansicht dargestellt. Die Sicherheitsvorrichtung besteht
im wesentlichen aus einem insbesondere schlüsselartigen Betätigungselement 2
und einem, der Aufnahme des Betätigungselements 2 dienenden Freigabeelement
4. Erfindungsgemäß sind das Betätigungselement 2 und das Freigabeelement 4
zusätzlich zu einer mechanischen Kodierung elektromagnetisch kodiert derart, daß
das Freigabeelement 4 mindestens ein, magnetische Feldänderungen erfassendes
Fühlerelement 6 aufweist und das Betätigungselement 2 mindestens ein, ein
Magnetfeld erzeugendes Magnetelement 8 aufweist. So wird erfindungsgemäß erst
nach doppelter Freischaltung der Sicherheitsvorrichtung - nach erfolgter
mechanischer und elektromagnetischer Dekodierung - ein elektrischer
Schaltvorgang eines mit der Sicherheitsvorrichtung verbundenen Positionsschalters
10 oder dergleichen freigegeben. In der dargestellten Ausführungsform der
erfindungsgemäßen Sicherheitsvorrichtung sind auf dem Betätigungselement 2,
beispielsweise sechs Magnetelemente 8 in zweireihiger Matrixanordnung
angeordnet. Analog zu dieser Anordnung weist das Freigabeelement 4 ebenfalls
sechs, in gleicher Weise angeordnete Fühlerelemente 6 auf. Dabei sind die
Fühlerelemente 6 und die Magnetelemente 8 derart angeordnet, daß sie im
betriebsmäßig zusammengeführten Zustand von Freigabe- und Betätigungselement
4, 2 im wesentlichen deckungsgleich übereinanderliegen. In einer bevorzugten
Ausfürungsform sind die Fühlerelemente 6 als Hallsensoren und die
Magnetelemente 8 als Dauermagnete ausgebildet.
Zur Funktionsweise der erfindungsgemäßen Sicherheitsvorrichtung:
Durch das betriebsmäßige Zusammenführen von Freigabeelement 4 und
zugehörigem Betätigungselement 2 erfolgt einerseits - aufgrund der äußeren Form
des Betätigungselements 2 - eine mechanische Dekodierung. Andererseits erfolgt
zusätzlich eine elektromagnetische Dekodierung, indem die Fühlerelemente 6 des
Freigabeelements 4 die Anordnung der auf dem Betätigungselement 2 befindlichen
Magnetelemente 8 abfragen, beziehungsweise erfassen und mit einem
vorhandenen Referenzabbild beziehungsweise -muster vergleichen. Bei
Übereinstimmung von Referenzabbild des Freigabeelements 4 und
Magnetelementeanordnung auf dem Betätigungselement 2, erfolgt die
elektromagnetische Dekodierung, so daß nach erfolgreicher mechanischer und
elektromagnetischer Entschlüsselung ein elektrischer Schaltvorgang des
Positionsschalters freigegeben wird. Für den Vergleich der
Magnetelementeanordnung des Betätigungselements 2 mit dem Referenzabbild des
Freigabeelements 4 ist jedes der Fühlerelemente 6 insbesondere mit einem
Komparator verbunden (nicht dargestellt). Dabei ist jeweils an einen der beiden
Komparatoreingänge eines jeden Komparators eine Referenzspannung angelegt
derart, daß das Referenzabbild entsteht. Der andere Eingang eines jeden
Komparators wird dann jeweils mit dem Signalausgang eines Fühlerelements 6
verbunden. So wird durch Einbringen des Betätigungselements 2 in das
Freigabeelement 4, die Änderung einzelner Magnetfelder im Bereich der
Fühlerelemente 6 erreicht und eine Art Spannungs- beziehungsweise Signalmatrix
erzeugt. Falls diese Signalmatrix mit dem vorhandenen Referenzabbild
übereinstimmt, wird ein Freigabesignal erzeugt. In the drawing, the safety device according to the invention is shown in a partial section in a perspective view. The safety device essentially consists of a key-like actuating element 2 and a
How the safety device according to the invention works:
Due to the operational merging of
Ein weiteres erfinderisches Merkmal der Sicherheitsvorrichtung besteht darin, daß
die Fühlerelemente 6 ferner derart mit einer Rechen- und Speichereinheit verbunden
sind (nicht dargestellt), daß durch erstmaliges betriebsmäßiges Zusammenführen
von Betätigungs- und Freigabeelement 2, 4 ein, der Anordnung der Magnetelemente
8 des Betätigungselements 2 entsprechendes Referenzmuster abgespeichert wird
und alle künftigen Dekodierungsvorgänge an Hand dieses erstellten
Referenzmusters erfolgen.
Die vorliegende Erfindung ist nicht auf das beschriebene Ausführungsbeispiel
beschränkt, sondern umfaßt auch alle im Sinne der Erfindung gleichwirkenden
Ausführungsformen.Another inventive feature of the safety device is that the sensor elements 6 are further connected to a computing and storage unit (not shown) in such a way that, by the first operational merging of the actuating and releasing
The present invention is not limited to the exemplary embodiment described, but also encompasses all embodiments having the same effect within the meaning of the invention.
Claims (7)
dadurch gekennzeichnet, daß das Betätigungselement (2) und das Freigabeelement (4) zusätzlich elektromagnetisch kodiert sind derart, daß das Freigabeelement (4) mindestens ein magnetische Feldänderungen erfassendes Fühlerelement (6) aufweist und das Betätigungselement (2) mindestens ein ein Magnetfeld erzeugendes Magnetelement (8) aufweist, so daß nach erfolgter mechanischer und elektromagnetischer Dekodierung ein elektrischer Schaltvorgang freigegeben wird.Safety device for position switches, in particular safety position switches, consisting of an actuating element (2) and a release element (4), the actuating element (2) and the release element (4) being mechanically coded in such a way that the operational merging of the actuating and release element (2 , 4) a mechanical decoding and at the same time a mechanical positive locking between these two elements (2, 4) takes place,
characterized in that the actuating element (2) and the release element (4) are additionally electromagnetically coded such that the release element (4) has at least one sensor element (6) which detects magnetic field changes and the actuating element (2) has at least one magnetic element which generates a magnetic field ( 8), so that an electrical switching process is released after mechanical and electromagnetic decoding.
dadurch gekennzeichnet, daß das beziehungsweise jedes Fühlerelement (6) als Hallsensor ausgebildet ist.Safety device according to claim 1,
characterized in that the or each sensor element (6) is designed as a Hall sensor.
dadurch gekennzeichnet, daß das beziehungsweise jedes Magnetelement (8) als Dauermagnet ausgebildet ist. Safety device according to claim 1,
characterized in that the or each magnetic element (8) is designed as a permanent magnet.
dadurch gekennzeichnet, daß das Freigabeelement (4) mehrere Fühlerelemente (6) und das Betätigungselement (2) mehrere Magnetelemente (8) aufweist, wobei die Magnetelemete (8) und die Fühlerelemente (6) derart angeordnet sind, daß im betriebsmäßig zusammengeführten Zustand von Freigabe- und Betätigungselement (4, 2) Fühler- und Magnetelemente (6, 8) nahezu deckungsgleich übereinander liegen.Safety device according to one of claims 1-3,
characterized in that the release element (4) has a plurality of sensor elements (6) and the actuating element (2) has a plurality of magnetic elements (8), the magnetic elements (8) and the sensor elements (6) being arranged such that in the operationally combined state of release - And actuating element (4, 2) sensor and magnetic elements (6, 8) are almost congruent one above the other.
dadurch gekennzeichnet, daß die Fühlerelemente (6) und die Magnetelemente (8) in Form einer Matrix angeordnet sind.Safety device according to claim 4,
characterized in that the sensor elements (6) and the magnetic elements (8) are arranged in the form of a matrix.
dadurch gekennzeichnet, daß jedem der Fühlerelemente (6) ein Komparator zur Auswertung des elektronischen Dekodiervorgangs nachgeschaltet ist.Safety device according to one or more of claims 1-5,
characterized in that a comparator for evaluating the electronic decoding process is connected downstream of each of the sensor elements (6).
dadurch gekennzeichnet, daß die Fühlerelemente (6) derart mit einer Rechen- und Speichereinheit verbunden sind, daß durch erstmaliges betriebsmäßiges Zusammenführen von Betätigungs- und Freigabeelement (2, 4) ein, der Anordnung der Magnetelemente (8) des Betätigungselements (2) entsprechendes Referenzmuster abgespeichert wird und alle künftigen Dekodierungsvorgänge an Hand dieses einmalig erstellten Referenzmusters erfolgen.Safety device according to claim 6,
characterized in that the sensor elements (6) are connected to a computing and storage unit in such a way that a first reference pattern corresponding to the arrangement of the magnetic elements (8) of the actuating element (2) is obtained when the actuating and releasing elements (2, 4) are brought together for the first time is stored and all future decoding processes take place on the basis of this one-time created reference pattern.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19642862 | 1996-10-17 | ||
| DE1996142862 DE19642862A1 (en) | 1996-10-17 | 1996-10-17 | Safety device for position switches |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0837485A2 true EP0837485A2 (en) | 1998-04-22 |
| EP0837485A3 EP0837485A3 (en) | 1998-12-02 |
Family
ID=7809018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97116825A Ceased EP0837485A3 (en) | 1996-10-17 | 1997-09-27 | Safety device for position switch |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0837485A3 (en) |
| JP (1) | JPH10154447A (en) |
| DE (1) | DE19642862A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0987726A2 (en) * | 1998-09-15 | 2000-03-22 | Pizzato Elettrica S.r.l. | Key-controlled safety switch |
| DE10230564A1 (en) * | 2002-07-05 | 2004-01-29 | Gerhard Thiel | Coded locking device for machine safety cover has projecting arms provided with passive components fitting into corresponding seatings provided with matching active components |
| FR2867605A1 (en) * | 2004-03-09 | 2005-09-16 | Simon Barnier | Electrical switching device for e.g. servomotor, has flexible knife switches provided on two distinct planes, such that permanent magnet situated on key has magnetic power to activate switches |
| EP2390888A1 (en) * | 2010-05-26 | 2011-11-30 | Rockwell Automation Limited | Safety switch |
| EP2562782A1 (en) * | 2010-09-17 | 2013-02-27 | Omron Corporation | Switch |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011121235A1 (en) * | 2011-12-12 | 2013-06-13 | Euchner Gmbh + Co. Kg | Module for a safety switch, safety switch with such a module and actuator for such a safety switch |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2052158A (en) * | 1979-06-02 | 1981-01-21 | Eja Eng Co Ltd | Electric switch |
| DE3424418C1 (en) * | 1984-07-03 | 1985-09-12 | Hans & Jos. Kronenberg Gmbh, 5060 Bergisch Gladbach | Safety switch |
| US5287098A (en) * | 1991-02-11 | 1994-02-15 | Briggs & Stratton Corp. | Fail safe system for a mechanical lock and key set with electrical interlock |
| DE4303367C1 (en) * | 1993-02-05 | 1994-02-24 | Schmersal K A Gmbh & Co | Security switch for safety door - has switch operating element fitted in switch housing to rotate cam discs acting as operating roller for movable contact carrier |
| DE4238016A1 (en) * | 1992-11-11 | 1994-05-19 | Kloeckner Moeller Gmbh | Position switch operating apparatus - enables switch to be put into door open or door closed or closed and locked positions by inserting key. |
| US5541562A (en) * | 1994-10-16 | 1996-07-30 | Honeywell Inc. | Apparatus for sensing the closure of a door |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1665761A1 (en) * | 1966-09-28 | 1971-01-21 | Sperry Rand Ltd | Electrical switching device |
-
1996
- 1996-10-17 DE DE1996142862 patent/DE19642862A1/en not_active Ceased
-
1997
- 1997-09-27 EP EP97116825A patent/EP0837485A3/en not_active Ceased
- 1997-10-15 JP JP28177497A patent/JPH10154447A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2052158A (en) * | 1979-06-02 | 1981-01-21 | Eja Eng Co Ltd | Electric switch |
| DE3424418C1 (en) * | 1984-07-03 | 1985-09-12 | Hans & Jos. Kronenberg Gmbh, 5060 Bergisch Gladbach | Safety switch |
| US5287098A (en) * | 1991-02-11 | 1994-02-15 | Briggs & Stratton Corp. | Fail safe system for a mechanical lock and key set with electrical interlock |
| DE4238016A1 (en) * | 1992-11-11 | 1994-05-19 | Kloeckner Moeller Gmbh | Position switch operating apparatus - enables switch to be put into door open or door closed or closed and locked positions by inserting key. |
| DE4303367C1 (en) * | 1993-02-05 | 1994-02-24 | Schmersal K A Gmbh & Co | Security switch for safety door - has switch operating element fitted in switch housing to rotate cam discs acting as operating roller for movable contact carrier |
| US5541562A (en) * | 1994-10-16 | 1996-07-30 | Honeywell Inc. | Apparatus for sensing the closure of a door |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0987726A2 (en) * | 1998-09-15 | 2000-03-22 | Pizzato Elettrica S.r.l. | Key-controlled safety switch |
| EP0987726A3 (en) * | 1998-09-15 | 2001-03-07 | Pizzato Elettrica S.r.l. | Key-controlled safety switch |
| DE10230564A1 (en) * | 2002-07-05 | 2004-01-29 | Gerhard Thiel | Coded locking device for machine safety cover has projecting arms provided with passive components fitting into corresponding seatings provided with matching active components |
| FR2867605A1 (en) * | 2004-03-09 | 2005-09-16 | Simon Barnier | Electrical switching device for e.g. servomotor, has flexible knife switches provided on two distinct planes, such that permanent magnet situated on key has magnetic power to activate switches |
| EP2390888A1 (en) * | 2010-05-26 | 2011-11-30 | Rockwell Automation Limited | Safety switch |
| US8653914B2 (en) | 2010-05-26 | 2014-02-18 | Rockwell Automation Limited | Safety switch |
| US8872607B2 (en) | 2010-05-26 | 2014-10-28 | Rockwell Automation Limited | Safety switch |
| EP2562782A1 (en) * | 2010-09-17 | 2013-02-27 | Omron Corporation | Switch |
| EP2562782A4 (en) * | 2010-09-17 | 2014-12-03 | Omron Tateisi Electronics Co | LIGHT SWITCH |
| US9190226B2 (en) | 2010-09-17 | 2015-11-17 | Omron Corporation | Switch |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0837485A3 (en) | 1998-12-02 |
| DE19642862A1 (en) | 1998-04-30 |
| JPH10154447A (en) | 1998-06-09 |
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