EP0082480A1 - Pressure switch - Google Patents

Pressure switch Download PDF

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Publication number
EP0082480A1
EP0082480A1 EP82111664A EP82111664A EP0082480A1 EP 0082480 A1 EP0082480 A1 EP 0082480A1 EP 82111664 A EP82111664 A EP 82111664A EP 82111664 A EP82111664 A EP 82111664A EP 0082480 A1 EP0082480 A1 EP 0082480A1
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EP
European Patent Office
Prior art keywords
pressure
contact arm
housing
contact
switch
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
EP82111664A
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German (de)
French (fr)
Other versions
EP0082480B1 (en
Inventor
René KÄGI
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.)
Elektro-Apparatebau Olten AG
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Elektro-Apparatebau Olten AG
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Priority to AT82111664T priority Critical patent/ATE15113T1/en
Publication of EP0082480A1 publication Critical patent/EP0082480A1/en
Application granted granted Critical
Publication of EP0082480B1 publication Critical patent/EP0082480B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow

Definitions

  • the present invention relates to a pressure switch, the resilient contact arm bends under the action of a pressure cushion acted upon by a response pressure and travels a working distance with a certain contact point and which is clamped at one point to the housing and at another point against an adjustable support is present.
  • Such a pressure switch is known from F-PS 2 213 572.
  • the adjustable support is designed as a screw which can be moved vertically against the contact arm in a nut thread fixed to the housing.
  • This device has the disadvantage that when using standard threads it is difficult to set the response pressure in a graduated and reproducible manner. In particular, it is difficult to arrange a mark on the screw and to connect it to a scale on the housing side in order to achieve rapid reproducibility of the response pressure.
  • DE-PS 470 106 in which the housing-side contact point is formed by a screw which can be adjusted vertically against the contact arm in a nut thread fixed to the housing.
  • the object of the present invention is to improve a pressure switch of the type mentioned at the outset in such a way that a more precise setting of the response pressure is possible while maintaining a small and, if desired, also flat housing construction.
  • this object is achieved in that the housing has a guide parallel to the contact arm and the support is mounted in a longitudinally displaceable manner in the guide.
  • the invention has the advantage that a finely graduated scale of the response pressures can be attached to the outside of the housing with a relatively large measurement mark spacing, which cooperates with a mark attached to the displaceable support.
  • the pressure pad consists of two foils joined together along the edges and is inserted between the bottom of the switch housing and the contact arm in a space-filling manner, even in the vented state. This enables a particularly small-volume and flat design, the size of the switch housing only having to exceed the length of the movable contact arm and its lifting height.
  • the pressure pad should point from the clamped end of the contact arm device against the free contact arm end extends beyond the guide, and that the contact surface facing the contact arm of the pressure pad extends from the clamped end of the contact arm towards the free end of the contact arm.
  • the largest possible surface area of the cushion acts against the deflectable part of the contact arm, without the latter experiencing a deflection which interferes with the switch process between the two supports.
  • the contact arm is clamped movably in the middle on two sides, its free ends each being under the action of the support on the one hand and under the action of a pressure pad on the other.
  • the pressure switch 1 illustrated in FIGS. 1 and 2 comprises an elongated square housing 2, in which extends a movable contact arm 3, which is resiliently clamped in the housing 2 at its connection end and merges outwards into a soldering lug 4.
  • the free end of the contact arm 3 here carries the double contact 5, which in the rest position shown bears against a break contact 6 with a given bias in the contact arm 3. This normally closed contact 6 goes out into a solder lug 7. If the contact arm 3 is raised, the double contact 5 comes into contact with a work contact 8, which goes out into a solder lug 9.
  • the pressure switch according to the invention which is designed as a changeover switch according to FIGS. 1 and 2, can also be designed as a normally open or normally closed contact switch by omitting the lower contact 6 or the upper contact 8.
  • a multiple contact arrangement can be easily implemented,
  • the pressure pad 10 can be connected to a pressure medium source (not shown) via a connection nipple 12 penetrating the housing base 11.
  • the pressure medium is usually air, but can also be a hydraulic medium.
  • the effective area of the pressure cushion 10 widens from the clamped end of the contact arm 3 to the free end of the contact arm and has an effective area of approximately approximate teardrop or pear-shaped shape, as is particularly shown in FIG. 3.
  • the movable contact arm 3 is supported near its deflection characteristic, thus avoiding uncontrolled deflection of the contact arm during its subsequent movement as a function of the pressure increase in the pressure cushion 10, which expands approximately wedge-shaped. This results in a particularly sensitive response characteristic, which makes it possible to use the pressure switch according to the invention in particular also in the transition area to the vacuum. Furthermore, the arrangement allows contact adhesives to be overcome without the movable contact arm 3 being able to bulge.
  • a slide 15 which is displaceably guided on the switch housing 2 in a longitudinal slot 13 along an adjustment scale 14, is supported on the inside via a pressure part 16 on the movable contact arm 3.
  • This pressure part 16 can be a curved spring element or a hinged stamp or the like.
  • the pressure switch according to the invention is able to meet all of the above requirements and is in particular robust, simple, sensitive to switching and of a small construction volume.
  • the pressure switch 1 according to the invention can also be assembled into a star-shaped or linear multiple switch, as is indicated in FIG. 1.
  • it can be expedient to design the individual housings of the pressure switches for plugging together or to provide a common housing for all pressure switches.
  • the pressure switch according to the invention comprises a clamped in the center of the switch housing 18 and movable towards two sides Contact arm 19, the free ends 20 and 21 of which are on the one hand under the action of a slide 22 or 23 and on the other hand under the action of a pressure pad 24 or 25.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

1. Pressure operated switch with a housing (2; 18) on which an elastic contact arm (3; 20, 21) is fixed and whose movable part projects into the housing and comprises a contact (5) co-operating with a contact (5, 8) integral with the housing, the movable part between the fixing zone and the contacts (5, 6, 8) abutting at one side against an abutment (15, 16; 22, 23) adjustable from the outside of the housing and being acted upon from the other side, at least between the abutment and the contacts, by a pressure pad (10; 24, 25), characterised in that a guide (13) is provided which is fast with the housing and which extends along the movable part of the contact arm (3; 20, 21), and that the abutment (15, 16; 22, 23) is mounted to be displaceable in the guide (13) between the fixing zone and the contacts, without modifying the spacing between the contacts (5, 6, 8) when the abutment (15, 16; 22, 23) is displaced.

Description

Die vorliegende Erfindung bezieht sich auf einen Druckschalter, dessen federnder Kontaktarm unter der Wirkung eines von einem Ansprechdruck beaufschlagten Druck- kissens sich biegt und mit einer bestimmten Köntaktstelle einen Arbeitsweg zurücklegt und der an einer Stelle gehäusefest eingespannt ist und an einer anderen Stelle gegen ein verstellbares Auflager anliegt.The present invention relates to a pressure switch, the resilient contact arm bends under the action of a pressure cushion acted upon by a response pressure and travels a working distance with a certain contact point and which is clamped at one point to the housing and at another point against an adjustable support is present.

Ein derartiger Druckschalter ist aus der F-PS 2 213 572 bekannt. Zum Verstellen des Ansprechdruckes ist darin das verstellbare Auflager als Schraube ausgebildet, die in einem gehäusefesten Muttergewinde senkrecht gegen den Kontaktarm verschiebbar ist. Diese Vorrichtung hat den Nachteil, dass es bei der Verwendung von Normgewinden schwierig ist, den Ansprechdruck fein abgestuft und reproduzierbar einzustellen. Insbesondere ist es schwierig an der Schraube eine Marke anzuordnen und diese mit einer gehäuseseitigen Skala in Verbindung zu bringen, um eine rasche Reproduzierbarkeit des Ansprechdruckes zu erreichen.Such a pressure switch is known from F-PS 2 213 572. To adjust the response pressure, the adjustable support is designed as a screw which can be moved vertically against the contact arm in a nut thread fixed to the housing. This device has the disadvantage that when using standard threads it is difficult to set the response pressure in a graduated and reproducible manner. In particular, it is difficult to arrange a mark on the screw and to connect it to a scale on the housing side in order to achieve rapid reproducibility of the response pressure.

Das gleiche Problem zeigt sich bei der DE-PS 470 106 bei der die gehäuseseitige Kontaktstelle durch eine Schraube gebildet wird, welche in einem gehäusefesten Muttergewinde senkrecht gegen den Kontaktarm verstellt werden kann.The same problem is shown in DE-PS 470 106 in which the housing-side contact point is formed by a screw which can be adjusted vertically against the contact arm in a nut thread fixed to the housing.

Die vorliegende Erfindung stellt sich die Aufgabe, einen Druckschalter der eingangs erwähnten Art derart zu verbessern, dass unter Wahrung einer kleinen und gewünschtenfalls auch flachen Gehäusebauweise ein genaueres Einstellen des Ansprechdruckes möglich ist.The object of the present invention is to improve a pressure switch of the type mentioned at the outset in such a way that a more precise setting of the response pressure is possible while maintaining a small and, if desired, also flat housing construction.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass das Gehäuse parallel zum Kontaktarm eine Führung aufweist und das Auflager in der Führung längsverschiebbar gelagert ist.According to the invention, this object is achieved in that the housing has a guide parallel to the contact arm and the support is mounted in a longitudinally displaceable manner in the guide.

Die Erfindung hat den Vorteil, dass auf der Gehäuseaussenseite mit einem verhältnismässig grossen Messmarkenabstand eine fein gestufte Skala der Ansprechdrucke angebracht werden kann, welche mit einer am verschiebbaren Auflager angebrachten Marke zusammenwirkt.The invention has the advantage that a finely graduated scale of the response pressures can be attached to the outside of the housing with a relatively large measurement mark spacing, which cooperates with a mark attached to the displaceable support.

Vorzugsweise ist vorgesehen, dass das Druckkissen aus zwei entlang den Rändern miteinander verbundenen Folien besteht und zwischen dem Boden des Schaltergehäuses und dem Kontaktarm auch im entlüfteten Zustand raumfüllend eingelegt ist. Hierdurch wird eine besonders kleinvolumige und flache Bauweise möglich, wobei die Grösse des Schaltergehäuses nur gering die Länge des beweglichen Kontaktarmes und dessen Hubhöhe überschreiten muss.It is preferably provided that the pressure pad consists of two foils joined together along the edges and is inserted between the bottom of the switch housing and the contact arm in a space-filling manner, even in the vented state. This enables a particularly small-volume and flat design, the size of the switch housing only having to exceed the length of the movable contact arm and its lifting height.

Damit der Schalter bereits bei sehr geringem Druck anspricht, wird vorgeschlagen, dass sich das Druckkissen vom eingespannten Ende des Kontaktarmes in Richttung gegen das freie Kontaktarmende über die Führung hinaus erstreckt, und dass sich die dem Kontaktarm zugewandte Wirkungsfläche des Druckkissens vom eingespannten Ende des Kontaktarmes her zum freien Ende des Kontaktarmes hin erweitert. Dadurch wirkt immer eine möglichst grosse Fläche des Kissens gegen den auslenkbaren Teil des Kontaktarmes, ohne dass dieser zwischen den beiden Auflagern eine den Schaltervorgang beeinträchtigende Durchbiegung erfährt.So that the switch responds even at very low pressure, it is proposed that the pressure pad should point from the clamped end of the contact arm device against the free contact arm end extends beyond the guide, and that the contact surface facing the contact arm of the pressure pad extends from the clamped end of the contact arm towards the free end of the contact arm. As a result, the largest possible surface area of the cushion acts against the deflectable part of the contact arm, without the latter experiencing a deflection which interferes with the switch process between the two supports.

Nach einer vorteilhaften Verwendung des erfindungsgemässen Schalters als Druckdifferenzschalter ist der Kontaktarm nach zwei Seiten hin beweglich in seiner Mitte eingespannt, wobei seine freien Enden je einerseits unter der Wirkung des Auflagers und anderseits unter der Wirkung eines Druckkissens stehen.According to an advantageous use of the switch according to the invention as a pressure differential switch, the contact arm is clamped movably in the middle on two sides, its free ends each being under the action of the support on the one hand and under the action of a pressure pad on the other.

Beispielsweise Ausführungsformen des Erfindungsgegenstandes sind nachfolgend anhand der Zeichnung näher erläutert. Es zeigen:

  • Fig. 1 einen erfindungsgemässen Druckschalter in schaubildartiger Darstellung,
  • Fig. 2 einen Druckschalter gemäss Fig. 1 im Längsschnitt,
  • Fig. 3 und 4 in Draufsicht und in Seitenansicht das Funktionsprinzip des Druchschalters gemäss den Fig. 1 und 2 und
  • Fig. 5 den erfindungsgemässen Druckschalter in Form eines Druckdifferenzschalters.
For example, embodiments of the subject matter of the invention are explained in more detail below with reference to the drawing. Show it:
  • 1 shows a pressure switch according to the invention in a diagram-like representation,
  • 2 shows a pressure switch according to FIG. 1 in longitudinal section,
  • 3 and 4 in plan view and in side view the functional principle of the pressure switch according to FIGS. 1 and 2 and
  • Fig. 5 shows the pressure switch according to the invention in the form of a pressure differential switch.

Der in den Fig. 1 und 2 veranschaulichte Druckschalter 1 umfasst ein längliches Vierkantgehäuse 2, in welchem sich ein beweglicher Kontaktarm 3 erstreckt, der an seinem Anschluss-Ende federnd im Gehäuse 2 eingespannt ist und nach aussen in eine Lötfahne 4 übergeht. Das freie Ende des Kontaktarmes 3 trägt hier den Doppelkontakt 5, der in der gezeigten Ruhelage an einem Ruhekontakt 6 mit einer gegebenen Vorspannung im Kontaktarm 3 anliegt. Dieser Ruhekontakt 6 geht nach aussen in eine Lötfahne 7 über.Wird der Kontaktarm 3 angehoben, so kommt der Doppelkontakt 5 mit einem Arbeitskontakt 8 in Berührung, der nach aussen in eine Lötfahne 9 übergeht.The pressure switch 1 illustrated in FIGS. 1 and 2 comprises an elongated square housing 2, in which extends a movable contact arm 3, which is resiliently clamped in the housing 2 at its connection end and merges outwards into a soldering lug 4. The free end of the contact arm 3 here carries the double contact 5, which in the rest position shown bears against a break contact 6 with a given bias in the contact arm 3. This normally closed contact 6 goes out into a solder lug 7. If the contact arm 3 is raised, the double contact 5 comes into contact with a work contact 8, which goes out into a solder lug 9.

Schon hier ist erkennbar, dass der erfindungsgemässe Druckschalter, der gemäss Fig. 1 und 2 als Umschalter ausgeführt ist, durch Weglassen des unteren Kontaktes 6 oder des oberen Kontaktes 8 auch als Arbeitskontakt- oder Ruhekontaktschalter ausgebildet sein kann. Ebenso ist eine Mehrfachkontaktanordnung ohne weiteres realisierbar,It can already be seen here that the pressure switch according to the invention, which is designed as a changeover switch according to FIGS. 1 and 2, can also be designed as a normally open or normally closed contact switch by omitting the lower contact 6 or the upper contact 8. Likewise, a multiple contact arrangement can be easily implemented,

Als Druckübertragungselement dient hier ein aus einer relativ dünnwandigen Folie gebildetes Druck- kissen 10, auf dem sich der bewegliche Kontaktarm 3 mit dem grösseren Teil seiner flächigen Ausdehnung in Wirkungsverbindung abstützt. Wie Fig. 2 deutlich zeigt, ist dabei das Druckkissen 10 zwischen dem Boden 11 des Schaltergehäuses 2 und dem beweglichen Kontaktarm 3 eingelegt. Das Druckkissen 10 ist über einen, den Gehäuseboden 11 durchdringenden Anschlussnippel 12 an eine Druckmediumquelle (nicht gezeigt) anschliessbar. Das Druckmedium ist in der Regel Luft, kann aber auch ein hydraulisches Medium sein.A pressure pad 10, formed from a relatively thin-walled film, serves as the pressure transmission element, on which the movable contact arm 3 is supported in operative connection with the greater part of its areal extension. 2 clearly shows the pressure pad 10 is inserted between the bottom 11 of the switch housing 2 and the movable contact arm 3. The pressure pad 10 can be connected to a pressure medium source (not shown) via a connection nipple 12 penetrating the housing base 11. The pressure medium is usually air, but can also be a hydraulic medium.

Von wesentlicher Bedeutung ist u.a., dass sich die Wirkungsfläche des Druck-Kissens 10 vom eingespannten Ende des Kontaktarmes 3 her zum freien Ende des Kontaktarmes hin erweitert und eine Wirkfläche von etwa angenähert tropfen- oder birnenförmigen Gestalt aufweist, wie dies insbesondere Fig. 3 zeigt.It is of essential importance, inter alia, that the effective area of the pressure cushion 10 widens from the clamped end of the contact arm 3 to the free end of the contact arm and has an effective area of approximately approximate teardrop or pear-shaped shape, as is particularly shown in FIG. 3.

Wie Fig. 4 deutlich macht, erfolgt damit eine Druckunterstützung des beweglichen Kontaktarmes 3 nahe dessen Auslenkungskennlinie, womit unkontrollierte Kontaktarmausbiegungen bei dessen Folgebewegung in Abhängigkeit der Druckzunahme im Druckkissen 10, welches sich dabei etwa keilförmig ausdehnt, vermieden werden. Dies ergibt eine besonders empfindliche Ansprechcharakteristik, was erlaubt, den erfindungsgemässen Druckschalter insbesondere auch im Uebergangsbereich zum Vacuum einzusetzten. Ferner gestattet die Anordnung die Ueberwindung von Kontaktklebern, ohne dass dabei der bewegliche Kontaktarm 3 ausbauchen kann.4 makes it clear that the movable contact arm 3 is supported near its deflection characteristic, thus avoiding uncontrolled deflection of the contact arm during its subsequent movement as a function of the pressure increase in the pressure cushion 10, which expands approximately wedge-shaped. This results in a particularly sensitive response characteristic, which makes it possible to use the pressure switch according to the invention in particular also in the transition area to the vacuum. Furthermore, the arrangement allows contact adhesives to be overcome without the movable contact arm 3 being able to bulge.

Zum Einstellen der Ansprechkraft des erfindungsgemässen Druckschalters 1 durch Veränderung der freien Bewegungslänge des beweglichen Kontaktarmes 3 dient ein am Schaltergehäuse 2 in einem Längsschlitz 13 entlang einer Einstellskala 14 verschiebbar geführter Schieber 15, der sich innenseitig über einen Druckteil 16 am beweglichen Kontaktarm 3 abstützt. Dieser Druckteil 16 kann ein gekrümmtes Federelement oder ein angelenkter Stempel oder dgl. sein.To adjust the response force of the pressure switch 1 according to the invention by changing the free movement length of the movable contact arm 3, a slide 15, which is displaceably guided on the switch housing 2 in a longitudinal slot 13 along an adjustment scale 14, is supported on the inside via a pressure part 16 on the movable contact arm 3. This pressure part 16 can be a curved spring element or a hinged stamp or the like.

Aus dem Vorbeschriebenen geht hervor, dass der erfindungsgemässe Druckschalter alle vorgenannten Anforderungen zu erfüllen vermag und insbesondere robust, einfach, schaltempfindlich und von geringem Bauvolumen ist.It is apparent from the above that the pressure switch according to the invention is able to meet all of the above requirements and is in particular robust, simple, sensitive to switching and of a small construction volume.

Zudem lässt sich der erfindungsgemässe Druckschalter 1 auch zu einem sternförmigen oder linearen Mehrfachschalter zusammenbauen, wie dies in Fig. 1 angedeutet ist. Hierfür kann es zweckmässig sein, die Einzelgehäuse der Druckschalter zum Zusammenstecken auszugestalten oder für alle Druckschalter ein gemeinsames Gehäuse vorzusehen.In addition, the pressure switch 1 according to the invention can also be assembled into a star-shaped or linear multiple switch, as is indicated in FIG. 1. For this purpose, it can be expedient to design the individual housings of the pressure switches for plugging together or to provide a common housing for all pressure switches.

Weiter ist es möglich, den erfindungsgemässen Druckschalter als Druckdifferenzschalter 17 auszubilden, wie dies Fig. 5 mehr im Einzelnen zeigt. Hierfür umfasst der Schalter 17 einen im Schaltergehäuse 18 mittig eingespannten, nach zwei Seiten hin beweglichen Kontaktarm 19, dessen freien Enden 20 und 21 je einerseits unter der Wirkung eines Schiebers 22 bzw. 23 und anderseits unter der Wirkung eines Druckkissens 24 bzw. 25 stehen.It is also possible to design the pressure switch according to the invention as a pressure differential switch 17, as shown in more detail in FIG. 5. For this purpose, the switch 17 comprises a clamped in the center of the switch housing 18 and movable towards two sides Contact arm 19, the free ends 20 and 21 of which are on the one hand under the action of a slide 22 or 23 and on the other hand under the action of a pressure pad 24 or 25.

Es ist bei dieser Anordnung natürlich möglich, die beiden Schieber 22 und 23 geeignet miteinander zu verbinden (nicht gezeigt), um eine symmetrische Ansprechempfindlichkeitsveränderung für beide Druckseiten zu erreichen.With this arrangement it is of course possible to suitably connect the two slides 22 and 23 to one another (not shown) in order to achieve a symmetrical change in sensitivity for both pressure sides.

Claims (4)

1. Druckschalter, dessen federnder Kontaktarm (3) unter der Wirkung eines von einem Ansprechdruck beaufschlagten Druckkissens (10) sich biegt und mit einer bestimmten Kontaktstelle (5) einen Arbeitsweg zurücklegt und der an einer Stelle gehäusefest eingespannt ist und an einer anderen Stelle gegen ein verstellbares Auflager (15, 16) anliegt, dadurch gekennzeichnet, dass das Gehäuse (2) parallel zum Kontaktarm (3) eine Führung (13) aufweist, und das Auflager (15, 16) in der Führung (13) längsverschiebbar gelagert ist.1. Pressure switch, the resilient contact arm (3) bends under the action of a pressure pad (10) acted upon by a response pressure and travels a working distance with a certain contact point (5) and which is clamped in place at one point and against another at another point adjustable support (15, 16), characterized in that the housing (2) has a guide (13) parallel to the contact arm (3), and the support (15, 16) is mounted in the guide (13) so as to be longitudinally displaceable. 2. Druckschalter nach Anspruch 1, dadurch gekennzeichnet, dass das Druckkissen (10) aus zwei entlang den Rändern miteinander verbundenen Folien besteht und zwischen dem Boden (11) des Schaltergehäuses (2) und dem Kontaktarm (3) raumfüllend eingelegt ist.2. Pressure switch according to claim 1, characterized in that the pressure pad (10) consists of two films connected to one another along the edges and is inserted between the bottom (11) of the switch housing (2) and the contact arm (3) to fill the space. 3. Druckschalter nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass sich das Druckkissen (10) vom eingespannten Ende des Kontaktarmes in Richtung gegen das freie Kontaktarmende über die Führung (13) hinaus erstreckt und dass sich die dem Kontaktarm zugewandte Wirkungsfläche des Druckkissens (10) vom eingespannten Ende des Kontaktarmes (3) her zum freien Ende des Kontaktarmes hin erweitert.3. Pressure switch according to claims 1 or 2, characterized in that the pressure pad (10) extends from the clamped end of the contact arm towards the free contact arm end via the guide (13) and that the contact surface facing the contact arm of the pressure pad ( 10) from one tensioned end of the contact arm (3) forth towards the free end of the contact arm. 4. Verwendung des Druckschalters nach Anspruch 1 . als Druckdifferenzschalter (17) gekennzeichnet durch einen mittig eingespannten, nach zwei Seiten hin beweglichen Kontaktarm (19), dessen freie Enden (20 und 21) je einerseits unter der Wirkung des Auflagers (22 bzw. 23) und anderseits unter der Wirkung eines Druckkissens (24 bzw. 25) stehen.4. Use of the pressure switch according to claim 1. characterized as a pressure differential switch (17) by a contact arm (19) clamped in the middle and movable to two sides, the free ends (20 and 21) of which on the one hand under the action of the support (22 or 23) and on the other hand under the action of a pressure cushion ( 24 or 25).
EP82111664A 1981-12-21 1982-12-15 Pressure switch Expired EP0082480B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82111664T ATE15113T1 (en) 1981-12-21 1982-12-15 PRESSURE SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH8154/81 1981-12-21
CH8154/81A CH655199A5 (en) 1981-12-21 1981-12-21 PRESSURE SWITCH.

Publications (2)

Publication Number Publication Date
EP0082480A1 true EP0082480A1 (en) 1983-06-29
EP0082480B1 EP0082480B1 (en) 1985-08-21

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EP82111664A Expired EP0082480B1 (en) 1981-12-21 1982-12-15 Pressure switch

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EP (1) EP0082480B1 (en)
AT (1) ATE15113T1 (en)
CH (1) CH655199A5 (en)
DE (1) DE3265666D1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE470106C (en) * 1927-04-29 1929-01-05 Valentin L Fey Electric horn that closes the contact with compressed air
US2602350A (en) * 1949-12-21 1952-07-08 Barber Colman Co Condition responsive instrument
FR1601303A (en) * 1968-06-17 1970-08-17
LU68027A1 (en) * 1972-07-18 1973-09-26
FR2213572A1 (en) * 1973-01-04 1974-08-02 Guma Steven
FR2339903A1 (en) * 1976-01-30 1977-08-26 Ranco Inc DIFFERENTIAL PRESSURE SENSITIVE CONTROL DEVICE
FR2401504A1 (en) * 1977-08-27 1979-03-23 Bosch Siemens Hausgeraete ELECTRIC PRESSURE SWITCH

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE470106C (en) * 1927-04-29 1929-01-05 Valentin L Fey Electric horn that closes the contact with compressed air
US2602350A (en) * 1949-12-21 1952-07-08 Barber Colman Co Condition responsive instrument
FR1601303A (en) * 1968-06-17 1970-08-17
LU68027A1 (en) * 1972-07-18 1973-09-26
FR2213572A1 (en) * 1973-01-04 1974-08-02 Guma Steven
FR2339903A1 (en) * 1976-01-30 1977-08-26 Ranco Inc DIFFERENTIAL PRESSURE SENSITIVE CONTROL DEVICE
FR2401504A1 (en) * 1977-08-27 1979-03-23 Bosch Siemens Hausgeraete ELECTRIC PRESSURE SWITCH

Also Published As

Publication number Publication date
ATE15113T1 (en) 1985-09-15
EP0082480B1 (en) 1985-08-21
DE3265666D1 (en) 1985-09-26
CH655199A5 (en) 1986-03-27

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