EP0212454A1 - Contact mat - Google Patents

Contact mat Download PDF

Info

Publication number
EP0212454A1
EP0212454A1 EP86110883A EP86110883A EP0212454A1 EP 0212454 A1 EP0212454 A1 EP 0212454A1 EP 86110883 A EP86110883 A EP 86110883A EP 86110883 A EP86110883 A EP 86110883A EP 0212454 A1 EP0212454 A1 EP 0212454A1
Authority
EP
European Patent Office
Prior art keywords
contact mat
plates
mat according
distance
contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86110883A
Other languages
German (de)
French (fr)
Other versions
EP0212454B1 (en
Inventor
Manfred Weitzel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huebner Gummi und Kunststoff GmbH
Original Assignee
Huebner Gummi und Kunststoff GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huebner Gummi und Kunststoff GmbH filed Critical Huebner Gummi und Kunststoff GmbH
Priority to AT86110883T priority Critical patent/ATE58258T1/en
Publication of EP0212454A1 publication Critical patent/EP0212454A1/en
Application granted granted Critical
Publication of EP0212454B1 publication Critical patent/EP0212454B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H01H3/141—Cushion or mat switches

Definitions

  • Contact mats are widely used switching devices. They are used, for example, in front of doors to open and close them “automatically". Such a contact mat is placed on the floor in the area of the door, the normal position of the door being its closed position. If a person enters the contact mat, an impulse is generated which causes the door to open; if the person has left the contact mat again, the impulse stops and the door returns to its closed position. In a similar manner, a contact mat can be assigned to a machine tool in order to shut it down when an operator approaches it and runs the risk of being injured on the machine tool. Once the operator has left the area around the machine and thus the contact mat, the machine tool is started again.
  • the object of the invention is therefore to create a structurally and functionally simple contact mat than that of the previous design.
  • two plates 1, 2 are arranged one above the other, which are held at a predetermined distance from one another by springs 3, for example.
  • One is appropriate for the total area of the plates speaking number of springs 3 distributed so that the two plates are parallel to each other.
  • the distance between the plates is such that the two contacts 4.5 of several pairs of contacts do not touch each other when the plate is unloaded.
  • the number of contact pairs is again chosen appropriately, and the contact pairs are distributed over the plate surface.
  • the contacts 4, 5 are switched on in an electrical circuit which also includes a current source, for example a battery 6 and a signal generator 7.
  • the circuit is closed and a signal is generated by means of the signal generator 7.
  • the signal can be processed appropriately, for example stopping a machine tool when a person comes close to him and thereby enters the contact mat and causes its load and thus brings the plates 1, 2 closer to one another to close contacts.
  • This contact mat has two identical plates 8, 9, which consist of an elastic sheet or film material, for example natural or synthetic rubber, in which a large number of electrically conductive particles are embedded in a largely uniform distribution and in contact with one another (FIG. 2a).
  • the two plates are therefore inherently resilient and have a uniform electrical conductivity over their entire surface.
  • An electrically conductive wire 10, 11 is connected at basically any point on the plates, and each wire leads to the positive or negative connection terminal of an electric battery 12.
  • a signal generator 13 is again included, the function of which is the signal generator 7 of FIG. 1 corresponds and the structure of which can correspond to the structure of this signal transmitter.
  • Each plate 8, 9 is provided on the inside, ie on the side facing the other plate, with a perforated film 14, 15 made of electrically non-conductive material.
  • the plates, together with the perforated film associated with the respective plate are surrounded all around by an edge profile 16, 17.
  • the contact mat according to FIG. 2 is unloaded, the two plates 8, 9 are separated from one another by the foils 14, 15, the circuit is interrupted. If the contact mat is e.g. loaded by a person walking on it, the plate parts in the area of the holes 18 of the perforated foils pass through these holes and touch each other in these areas, so that the circuit is closed and the signal generator 13 generates a signal which can be further processed in the manner described above.
  • the perforated films expediently have holes of different diameters, but care must be taken that two holes in each of the two perforated films form a pair of holes, the holes of which are arranged in the same axis and have the same diameter.
  • FIGS. 1, 2 and 2 a of the drawing show schematically in FIGS. 1, 2 and 2 a of the drawing.
  • 1 shows the first embodiment according to the invention, the individual parts being assigned to one another on approximately the same scale. represents, however, the distances between the plates 8.9 on the one hand and their perforated films 14,15 on the other hand, and between the perforated films 14,15 are shown greater than they will actually be for the sake of clarity.
  • the plates 8.9 on the one hand and their perforated films 14.15 on the other hand and the perforated films 14.15 lie directly on top of one another.
  • the distance between the plates 8.9 in the "switch-off position" corresponds to the sum of the thicknesses of both perforated foils and the "switching path" of both plates 8.9 corresponds to a perforated film thickness, so that in the "switch-on position" the plates 8.9 in the areas of the holes 18 meet in the plane in which the perforated foils 14, 15 abut one another, although this need not be done methematically exactly and a plate can easily pass through the holes of the perforated foil assigned to it and partially enter the holes of the other perforated foil, in the plate associated with this perforated film then enters correspondingly less far.
  • 2a shows a cross section through one of the plates 8, 9 on a larger scale in order to show the distribution of elastic material 19 and electrically conductive particles 20 schematically.
  • the foils 14, 15 can be dispensed with and instead a corresponding embossing can be assigned to the mutually facing sides of the plates 8, 9.
  • a minimum current and always flows in the circuit the change in the current which occurs when the contact mat is loaded due to the plates resting against one another over a larger area is used to actuate the signal generator 13.

Abstract

The object of the application is an electrically operating contact mat which triggers a switching pulse that can be transmitted externally in the event of a change in the distance between its lower supporting surface (2) and its upper covering surface (1). Essentially, it is characterised in that, between the lower supporting surface and the upper covering surface, there are arranged a number of electrical switches (4, 5) which operate in the same sense in the event of changes to the distance between the two surfaces and are connected in a circuit containing a current source (6) and a signal generator (7). The upper covering surface and the lower supporting surface are preferably two plates of elastic material into which are embedded, in a largely even distribution, a large number of particles of electrically conductive material, each of which is provided with a perforated film of electrically non-conductive, elastic material. When no load is applied, these two plates are at a predetermined distance from one another (open switch position); on the other hand, when they are loaded, they move so far towards each other that a contact occurs facilitating the current flow (closed switch position). <IMAGE>

Description

Kontaktmatten sind vielfach angewendete Schaltmittel. Sie finden beispielsweise vor Türen Anwendung, um deren "automatisches" Öffnen und Schließen zu bewirken. Auf den Fußboden ist im Bereich der Tür eine solche Kontaktmatte aufgelegt, wobei die Normalstellung der Tür deren geschlossene Stellung ist. Betritt eine Person die Konstaktmatte, so wird ein Impuls erzeugt, der das Öffnen der Tür veranlaßt, hat die Person die Kontaktmatte wieder verlassen, so hört der Impuls auf, die Tür kehrt in ihre Schließstellung zurück. In ähnlicher Weise kann eine Kontaktmatte einem Werkzeugautomaten zugeordnet sein, um diesen stillzu­setzen, wenn sich ihm eine Bedienungsperson nähert und Gefahr läuft, an dem Werkzeugautomaten verletzt zu werden. Hat die Bedienungsperson den Gerfahrenbe­reich und damit die Kontaktmatte wieder verlassen, so wird der Werkzeugautomat wieder in Gang gesetzt.Contact mats are widely used switching devices. They are used, for example, in front of doors to open and close them "automatically". Such a contact mat is placed on the floor in the area of the door, the normal position of the door being its closed position. If a person enters the contact mat, an impulse is generated which causes the door to open; if the person has left the contact mat again, the impulse stops and the door returns to its closed position. In a similar manner, a contact mat can be assigned to a machine tool in order to shut it down when an operator approaches it and runs the risk of being injured on the machine tool. Once the operator has left the area around the machine and thus the contact mat, the machine tool is started again.

Bisher finden sich Kontaktmatten am Markt, die aus Gummi bestehen und in die ein Druckschlauch eingelegt ist. Betritt eine Person diese Kontaktmatte, so wird der Schlauch komprimiert, es entsteht eine Druckwelle die einen Schalter betätigt, der beispielsweise eine Maschine stillsetzt.So far there are contact mats on the market that are made of rubber and in which a pressure hose is inserted. If a person enters this contact mat, the hose is compressed, a pressure wave is generated which actuates a switch which, for example, stops a machine.

Diese Kontaktmatten sind relativ vielteilig und arbeiten mit relativ großen Verzögerungen.These contact mats are relatively multi-part and work with relatively large delays.

Aufgabe der Erfindung ist deshalb die Schaffung einer baulich und funktionell einfachen Kontaktmatte, als die der bisherigen Bauweise.The object of the invention is therefore to create a structurally and functionally simple contact mat than that of the previous design.

Die Lösung der Aufgabe ergibt sich aus den Patentansprüchen.The solution to the problem arises from the patent claims.

Gemäß dem Grundgedanken der Erfindung sind zwei Platten 1,2 übereinander angeordnet, die beispielsweise durch Federn 3 in einem vorgegebenen Abstand voneinander gehalten sind. Auf die Gesamtfläche der Platten ist eine zweckent­ sprechende Anzahl von Federn 3 verteilt, so daß die beiden Platten parallel zueinander liegen. Der Abstand zwischen den Platten ist so bemessen, daß die beiden Kontakte 4,5 mehrerer Kontaktpaare einander nicht berühren, wenn die Platte unbelastet ist. Die Zahl der Kontaktpaare ist wieder zweckentsprechend gewählt, und die Kontaktpaare sind auf die Plattenfläche verteilt. Die Kontakte 4,5 sind in einem elektrischen Kreis eingeschaltet, der weiterhin eine Stromquelle, beispielsweise eine Batterie 6 und einen Signalgeber 7 einschließt.According to the basic idea of the invention, two plates 1, 2 are arranged one above the other, which are held at a predetermined distance from one another by springs 3, for example. One is appropriate for the total area of the plates speaking number of springs 3 distributed so that the two plates are parallel to each other. The distance between the plates is such that the two contacts 4.5 of several pairs of contacts do not touch each other when the plate is unloaded. The number of contact pairs is again chosen appropriately, and the contact pairs are distributed over the plate surface. The contacts 4, 5 are switched on in an electrical circuit which also includes a current source, for example a battery 6 and a signal generator 7.

Wird die Kontaktmatte belastet, so wird unter Kompression der Federn 3 der Abstand zwischen den Platten 1,2 zumindest örtlich soweit verändert, daß die Kontakte 4,5 einander berühren, der Stromkreis geschlossen wird und ein Signal mittels des Signalgebers 7 erzeugt wird. Das Signal kann zweckentsprechend weiterverarbeitet werden, beispielsweise eine Werkzeugmaschine stillsetzen, wenn eine Person in ihre Nähe kommt und dabei die Kontaktmatte betritt und deren Belastung bewirkt und so die Platten 1,2 zum Schließen von Kontakten einander nähert.If the contact mat is loaded, the distance between the plates 1, 2 is at least locally changed by compressing the springs 3 to such an extent that the contacts 4, 5 touch one another, the circuit is closed and a signal is generated by means of the signal generator 7. The signal can be processed appropriately, for example stopping a machine tool when a person comes close to him and thereby enters the contact mat and causes its load and thus brings the plates 1, 2 closer to one another to close contacts.

In der Praxis wird eine solche Kontaktmatte noch zu aufwendig sein, weshalb die Lösung gemäß Fig.2 als optimale erfindungsgemäße Lösung anzusehen ist.In practice, such a contact mat will still be too expensive, which is why the solution according to FIG. 2 is to be regarded as the optimal solution according to the invention.

Diese Kontaktmatte weist zwei identische Platten 8,9 auf, die aus einem elastischen Bahn- oder Folienmaterial, beispielsweise Natur- oder Kunstgummi bestehen, in das eine Vielzahl elektrisch leitender Partikel in weitestgehend gleichmäßiger Verteilung und einander leitend berührend eingebettet sind (Fig.2a). Die beiden Platten sind demzufolge in sich elastisch nachgiebig und haben über ihre gesamte Fläche hinweg eine gleichmäßige elektrische Leitfähigkeit. An grundsätz­lich beliebigen Stellen der Platten ist ein elektrisch leitender Draht 10,11 angeschlossen, under jeder Draht führt sur positiven bzw. negativen Anschlußklemme einer elektrischen Batterie 12. In diesen Stromkreis ist wiederum ein Signalgeber 13 eingeschlossen, dessen Funktion der des Signalgebers 7 von Fig.1 entspricht und dessen Aufbau dem Aufbau dieses Signalgebers entsprechen kann.This contact mat has two identical plates 8, 9, which consist of an elastic sheet or film material, for example natural or synthetic rubber, in which a large number of electrically conductive particles are embedded in a largely uniform distribution and in contact with one another (FIG. 2a). The two plates are therefore inherently resilient and have a uniform electrical conductivity over their entire surface. An electrically conductive wire 10, 11 is connected at basically any point on the plates, and each wire leads to the positive or negative connection terminal of an electric battery 12. In this circuit, a signal generator 13 is again included, the function of which is the signal generator 7 of FIG. 1 corresponds and the structure of which can correspond to the structure of this signal transmitter.

Jede Platte 8,9 ist auf der Innenseite, d.h. auf der der jeweils anderen Platte zugekehrten Seite mit einer Lochfolie 14,15 aus elektrisch nicht leitendem Material versehen. Außerdem sind die Platten zusammen mit der der jeweiligen Platte zugehörigen Lochfolie ringsum von einem Randprofil 16,17 eingefaßt.Each plate 8, 9 is provided on the inside, ie on the side facing the other plate, with a perforated film 14, 15 made of electrically non-conductive material. In addition, the plates, together with the perforated film associated with the respective plate, are surrounded all around by an edge profile 16, 17.

Ist die Kontaktmatte gemäß Fig.2 unbelastet, so sind die beiden Platten 8,9 durch die Folien 14,15 voneinander getrennt, der Stromkreis ist unterbrochen. Wird die Kontaktmatte z.B. durch eine darauf tretende Person belastet, so treten die Plattenteile im Bereich der Löcher 18 der Lochfolien durch diese Löcher hindurch und berühren sich einander in diesen Bereichen, so daß der Stromkreis geschlossen wird und der Signalgeber 13 ein in der vorbeschreibenen Weise weiterverarbeitbares Signal erzeugt. Die Lochfolien haben zweckmäßigerweise Löcher unterschiedlicher Durchmesser, es ist aber darauf zu achten, daß jeweils zwei Löcher beider Lochfolien ein Lochpaar bilden, dessen Löcher achsgleich angeordnet sind und gleichen Durchmesser haben.If the contact mat according to FIG. 2 is unloaded, the two plates 8, 9 are separated from one another by the foils 14, 15, the circuit is interrupted. If the contact mat is e.g. loaded by a person walking on it, the plate parts in the area of the holes 18 of the perforated foils pass through these holes and touch each other in these areas, so that the circuit is closed and the signal generator 13 generates a signal which can be further processed in the manner described above. The perforated films expediently have holes of different diameters, but care must be taken that two holes in each of the two perforated films form a pair of holes, the holes of which are arranged in the same axis and have the same diameter.

Es ist auf diese Weise eine extrem einfache preiswert herzustellende und betriebs­sichere Kontaktmatte mit großer Ansprechempfindlichkeit gegeben.In this way there is an extremely simple, inexpensive to manufacture and reliable contact mat with great responsiveness.

Aus den vorstehenden Erläuterungen ergibt sich, daß in den Fig.1,2 und 2a der Zeichnung Querschnitte durch erfindungsgemäße Kontaktmatten schematisch dar­gestellt sind. In Fig.1 ist die erste erfindungsgemäße Ausführungsform dargestellt, wobei die einzelnen Teile in etwa gleichem Maßstab einander zugeordnet sind. dar, wobei jedoch die Abstände zwischen den Platten 8,9 einerseits und ihren Loch­folien 14,15 andererseits, sowie zwischen den Lochfolien 14,15 der Deutlichkeit halber größer dargestellt sind, als sie tatsächlich sein werden. Die Platten 8,9 einerseits und ihre Lochfolien 14,15 andererseits sowie die Lochfolien 14,15 liegen unmittelbar aufeinander. Der Abstand zwischen den Platten 8,9 in der "Ausschalt­stellung" entspricht der Summe der Dicken beider Lochfolien und der "Schaltweg" beider Platten 8,9 entspricht jeweils einer Lochfoliendicke, so daß in der "Einschaltstellung" die Platten 8,9 in den Bereichen der Löcher 18 in der Ebene aufeinandertreffen, in der die Lochfolien 14,15 aneinanderliegen, wobei dies nicht methematisch exakt erfolgen muß und ohne weiteres eine Platte durch die Löcher der ihr zugeordneten Lochfolie hindurch- und in die Löcher der anderen Lochfolie teilweise eintreten kann, in die dann die dieser Lochfolie zugehörige Platte entsprechend weniger weit eintritt. In Fig.2a ist ein Querschnitt durch eine der Platten 8,9 in größerem Maßstab gezeigt, um die Verteilung von elastischem Material 19 und elektrisch leitenden Partikeln 20 schematisiert darzustellen.It follows from the above explanations that cross-sections through contact mats according to the invention are shown schematically in FIGS. 1, 2 and 2 a of the drawing. 1 shows the first embodiment according to the invention, the individual parts being assigned to one another on approximately the same scale. represents, however, the distances between the plates 8.9 on the one hand and their perforated films 14,15 on the other hand, and between the perforated films 14,15 are shown greater than they will actually be for the sake of clarity. The plates 8.9 on the one hand and their perforated films 14.15 on the other hand and the perforated films 14.15 lie directly on top of one another. The distance between the plates 8.9 in the "switch-off position" corresponds to the sum of the thicknesses of both perforated foils and the "switching path" of both plates 8.9 corresponds to a perforated film thickness, so that in the "switch-on position" the plates 8.9 in the areas of the holes 18 meet in the plane in which the perforated foils 14, 15 abut one another, although this need not be done methematically exactly and a plate can easily pass through the holes of the perforated foil assigned to it and partially enter the holes of the other perforated foil, in the plate associated with this perforated film then enters correspondingly less far. 2a shows a cross section through one of the plates 8, 9 on a larger scale in order to show the distribution of elastic material 19 and electrically conductive particles 20 schematically.

Gegebenenfalls kann auf die Folien 14,15 verzichtet werden und statt dessen den einander zugekehrten Seiten der Platten 8,9 eine jeweils entsprechende Prägung zugeordnet sein. In diesem Fall fließt in dem Stromkreis stets ein Mindeststrom und die bei Belastung der Kontaktmatte eintretende Veränderung des Stromes durch das Aneinanderliegen der Platten auf einer größeren Fläche wird zur Betätigung des Signalgebers 13 verwendet.If necessary, the foils 14, 15 can be dispensed with and instead a corresponding embossing can be assigned to the mutually facing sides of the plates 8, 9. In this case, a minimum current and always flows in the circuit the change in the current which occurs when the contact mat is loaded due to the plates resting against one another over a larger area is used to actuate the signal generator 13.

Claims (9)

1. Kontaktmatte, die bei einer Änderung des Abstandes zwischen ihrer unteren Abstützfläche und ihrer oberen Deckfläche einen nach außen übertragbaren Schaltimpuls auslöst, dadurch gekennzeichnet, daß zwischen unterer Abstütz­fläche und oberer Deckfläche eine Anzahl elektrischer Schalter (4,5;20) ange­ordnet sind, die auf Abstandsänderungen der beiden Flächen gleichsinnig ansprechen und in einen eine Stromquelle (6;12) und einen Impulsgeber (7;13) einschließenden Stromkreis eingeschaltet sind.1. Contact mat, which triggers an externally transferable switching pulse when the distance between its lower support surface and its upper cover surface changes, characterized in that a number of electrical switches (4,5; 20) are arranged between the lower support surface and the upper cover surface respond in the same direction to changes in the distance between the two surfaces and are switched on in a circuit including a current source (6; 12) and a pulse generator (7; 13). 2. Kontaktmatte nach Anspruch 1, dadurch gekennzeichnet, daß die Schal­ter (4,5;20) bei einer Abstandsverringerung zwischen Abstützfläche und Deck­fläche schließen.2. Contact mat according to claim 1, characterized in that the switches (4,5; 20) close when the distance between the support surface and the top surface is reduced. 3. Kontaktmatte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine Veilzahl von Schaltern (4,5;20) in zumindest annähernd gleichmäßiger Verteilung auf die Fläche der Kontaktmatte vorgesehen ist.3. Contact mat according to claim 1 or 2, characterized in that a number of switches (4,5; 20) is provided in at least approximately uniform distribution on the surface of the contact mat. 4. Kontaktmatte nach Anspruch 3, dadurch gekennzeichnet, daß zwei Platten (8,9) aus elastischem Material übereinanderliegen, in die in weitgehend gleichmäßiger Verteilung eine große Anzahl von Partikeln (20) aus elektrisch leitendem Material eingebetten sind, wobei die beiden Platten aus Gemischen aus elastischem Material (19) und elektrisch leitenden Partiklen (20) als die beiden Teile eines Schalters in einen Stromkreis eingeschaltet sind, der desweiteren eine Stromquelle (12) und einen Impulsgeber (13) aufweist und die unbelastet einen vorgegebenen Abstand voneinander haben (offene Schalterstellung), belastet dagegen soweit einander angenähert sind, daß ein den Stromfluß ermöglichender Kontakt besteht (geschlossene Schalterstellung).4. Contact mat according to claim 3, characterized in that two plates (8,9) of elastic material lie one above the other, in which a large number of particles (20) of electrically conductive material are embedded in a largely uniform distribution, the two plates made of mixtures Made of elastic material (19) and electrically conductive particles (20) as the two parts of a switch are switched into a circuit which also has a current source (12) and a pulse generator (13) and which are unloaded and have a predetermined distance from one another (open switch position ), on the other hand, are so close to each other that there is a contact that allows the current to flow (closed switch position). 5. Kontaktmatte nach Anspruch 4, gekennzeichnet durch ein Gitterwerk (14,15) aus elektrisch nicht leitendem Material zwischen beiden Platten (8,9).5. Contact mat according to claim 4, characterized by a latticework (14, 15) made of electrically non-conductive material between the two plates (8, 9). 6. Kontaktmatte nach Anspruch 5, dadurch gekennzeichnet, daß das Gitterwerk eine gelochte, biegbare Folie (14,15) ist.6. Contact mat according to claim 5, characterized in that the latticework is a perforated, bendable film (14, 15). 7. Kontaktmatte nach Anspruch 6, dadurch gekennzeichnet, daß je eine von zwei gleichen Folien (14,15) den einander zugekehrten Flächen der beiden Plat­ten (8,9) derart zugeordnet ist, daß die Löcher (18) beider Folien achsgleich übereinander liegen.7. Contact mat according to claim 6, characterized in that one of two identical foils (14, 15) is assigned to the mutually facing surfaces of the two plates (8, 9) in such a way that the holes (18) of both foils lie axially one above the other. 8. Kontaktmatte nach Anspruch 7, dadurch gekennzeichnet, daß jede Folie Löcher (18) verschiedener Durchmesser aufweist, jedoch Löcher beider Folien mit gleichem Durchmesser paarweise einander zugeordnet sind.8. Contact mat according to claim 7, characterized in that each film has holes (18) of different diameters, but holes of both films with the same diameter are assigned to one another in pairs. 9. Kontaktmatte nach Anspruch 4, dadurch gekennzeichnet, daß die einander zugekehrten Flächen der beiden Platten Leisten oder gitterförmig ausgebildet sind, wobei die beiden Platten mit den Gittern bzw. Leisten aufeinander liegen.9. Contact mat according to claim 4, characterized in that the mutually facing surfaces of the two plates are strips or lattice-shaped, the two plates with the grids or strips lying on one another.
EP86110883A 1985-08-07 1986-08-06 Contact mat Expired - Lifetime EP0212454B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86110883T ATE58258T1 (en) 1985-08-07 1986-08-06 CONTACT MAT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3528382 1985-08-07
DE19853528382 DE3528382A1 (en) 1985-08-07 1985-08-07 CONTACT MAT

Publications (2)

Publication Number Publication Date
EP0212454A1 true EP0212454A1 (en) 1987-03-04
EP0212454B1 EP0212454B1 (en) 1990-11-07

Family

ID=6277961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110883A Expired - Lifetime EP0212454B1 (en) 1985-08-07 1986-08-06 Contact mat

Country Status (3)

Country Link
EP (1) EP0212454B1 (en)
AT (1) ATE58258T1 (en)
DE (2) DE3528382A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293734A1 (en) * 1987-06-02 1988-12-07 LEDA Logarithmic Electrical Devices for Automation S.r.l. Two-dimensional electric conductor designed to function as an electric switch
EP1146528A2 (en) * 2000-04-14 2001-10-17 Karlheinz Beckhausen Electrical switch mat with device for static current monitoring

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29702383U1 (en) * 1997-02-12 1998-06-04 Giersiepen Gira Gmbh Electrical switch contact mat

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE232464C (en) *
CH497777A (en) * 1968-01-08 1970-10-15 Ver Baubeschlag Gretsch Co Contact mat
DE2101193A1 (en) * 1971-01-12 1972-08-03 Ver Baubeschlag Gretsch Co Contact mat
DE2138919A1 (en) * 1971-08-04 1973-02-15 Ver Baubeschlag Gretsch Co CONTACT MAT
BE844836A (en) * 1976-08-03 1976-12-01 ELECTRICAL SWITCH SYSTEM
US4105899A (en) * 1977-01-12 1978-08-08 Velosa Joseph M Safety mat switch for machine tools and their like
DE2148760B2 (en) * 1971-09-30 1978-08-17 Siemens Ag, 1000 Berlin Und 8000 Muenchen Floor mounted safety switch for X=ray diagnostic appts. - has tread plate supported by springs on mounting plate and contact sets is edge regions
EP0109159A1 (en) * 1982-09-30 1984-05-23 Minnesota Mining And Manufacturing Company Pressure sensitive switchmats

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE232464C (en) *
CH497777A (en) * 1968-01-08 1970-10-15 Ver Baubeschlag Gretsch Co Contact mat
DE2101193A1 (en) * 1971-01-12 1972-08-03 Ver Baubeschlag Gretsch Co Contact mat
DE2138919A1 (en) * 1971-08-04 1973-02-15 Ver Baubeschlag Gretsch Co CONTACT MAT
DE2148760B2 (en) * 1971-09-30 1978-08-17 Siemens Ag, 1000 Berlin Und 8000 Muenchen Floor mounted safety switch for X=ray diagnostic appts. - has tread plate supported by springs on mounting plate and contact sets is edge regions
BE844836A (en) * 1976-08-03 1976-12-01 ELECTRICAL SWITCH SYSTEM
US4105899A (en) * 1977-01-12 1978-08-08 Velosa Joseph M Safety mat switch for machine tools and their like
EP0109159A1 (en) * 1982-09-30 1984-05-23 Minnesota Mining And Manufacturing Company Pressure sensitive switchmats

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293734A1 (en) * 1987-06-02 1988-12-07 LEDA Logarithmic Electrical Devices for Automation S.r.l. Two-dimensional electric conductor designed to function as an electric switch
US4876419A (en) * 1987-06-02 1989-10-24 Leda Logarithmic Electrical Devices For Automation S.R.L. Two-dimensional electric conductor designed to function as an electric switch
EP1146528A2 (en) * 2000-04-14 2001-10-17 Karlheinz Beckhausen Electrical switch mat with device for static current monitoring
EP1146528A3 (en) * 2000-04-14 2004-04-28 Karlheinz Beckhausen Electrical switch mat with device for static current monitoring

Also Published As

Publication number Publication date
EP0212454B1 (en) 1990-11-07
DE3675461D1 (en) 1990-12-13
DE3528382A1 (en) 1987-02-12
ATE58258T1 (en) 1990-11-15

Similar Documents

Publication Publication Date Title
DE2922276C2 (en) counter
DE3015634C2 (en) Push button switch with a display panel
DE2451546C3 (en) Keypad
DE3601363A1 (en) ELECTRICAL SWITCHING ELEMENT
DE19750103A1 (en) Electrical ribbon cable connection device e.g. for installing in vehicle steering system
DE2323413A1 (en) NUCLEAR BATTERY
WO1999066766A1 (en) Electrical resistor heating element
EP0568755B1 (en) Contact device
DE102012100404B4 (en) collision protection
DE3701749A1 (en) ELECTRICAL SWITCHING DEVICE
DE2244438A1 (en) ELECTRIC KEYBOARD FOR OFFICE MACHINES
DE3533719A1 (en) Switch arrangement having a plurality of control elements
EP0212454A1 (en) Contact mat
DE2338746C2 (en) Push button switch
EP0462295A1 (en) Medical device for diagnostic and therapeutic purposes
EP0210973A1 (en) Push button key board
DE10014698B4 (en) Full-length switch and method of making the same
EP0395784B1 (en) Electrical switch mat
DE3006592C2 (en)
DE3839134C1 (en)
DE19604128C1 (en) Circuit arrangement with two contact surfaces e.g. for switch- mat or switch-plate
DE3431347C2 (en)
DE2758851A1 (en) CONTROL DEVICE FOR A SWITCHING ARRANGEMENT AND SWITCHING MATRIX USING THIS CONTROL DEVICE
DE3830604C2 (en)
DE2924993C2 (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19870827

17Q First examination report despatched

Effective date: 19890126

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19901107

Ref country code: SE

Effective date: 19901107

Ref country code: BE

Effective date: 19901107

Ref country code: NL

Effective date: 19901107

REF Corresponds to:

Ref document number: 58258

Country of ref document: AT

Date of ref document: 19901115

Kind code of ref document: T

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3675461

Country of ref document: DE

Date of ref document: 19901213

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19910806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19910831

Ref country code: LI

Effective date: 19910831

Ref country code: CH

Effective date: 19910831

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940725

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940829

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940901

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950806

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950806

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST