DE2304595A1 - ELECTRIC SWITCH - Google Patents

ELECTRIC SWITCH

Info

Publication number
DE2304595A1
DE2304595A1 DE2304595A DE2304595A DE2304595A1 DE 2304595 A1 DE2304595 A1 DE 2304595A1 DE 2304595 A DE2304595 A DE 2304595A DE 2304595 A DE2304595 A DE 2304595A DE 2304595 A1 DE2304595 A1 DE 2304595A1
Authority
DE
Germany
Prior art keywords
conductor
switch
insulating
sleeve
insulating element
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.)
Pending
Application number
DE2304595A
Other languages
German (de)
Inventor
Kenneth Leyland
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.)
Rists Wires and Cables Ltd
Original Assignee
Rists Wires and Cables Ltd
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 Rists Wires and Cables Ltd filed Critical Rists Wires and Cables Ltd
Publication of DE2304595A1 publication Critical patent/DE2304595A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/10—Contact cables, i.e. having conductors which may be brought into contact by distortion of the cable
    • H01B7/104—Contact cables, i.e. having conductors which may be brought into contact by distortion of the cable responsive to pressure
    • H01B7/106—Contact cables, i.e. having conductors which may be brought into contact by distortion of the cable responsive to pressure comprising concentric conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/029—Composite material comprising conducting material dispersed in an elastic support or binding material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Push-Button Switches (AREA)
  • Insulated Conductors (AREA)
  • Contacts (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Description

Rists Wires & Cables Limited, Lower Milehouse lane» Newcastleunder-Lyme« Staffordshire, EnglandRists Wires & Cables Limited, Lower Milehouse Lane "Newcastleunder-Lyme" Staffordshire, England

Elektrischer Schalter.Electric switch.

Die vorliegende Erfindung bezieht sich auf elektrische Schalter, wie sie z.B» als Melde- oder Warnschalter in Vorhöfen von Tankstellen, Benzinlagern oder dgl· verwendet werden. Diese Schalter haben üblicherweise die Form eines länglichen Rohres. Fährt ein Fahrzeug über derartige Rohrschalter, so verursacht der Druckanstieg im Rohr das Schließen eines Paares elektrischer Kontakte, wodurch ein elektrischer Warnkreis geschlossen wird, der beispielsweise eine Schelle oder ein anderes Warnsignal betätigt, um anzuzeigen, daß ein Fahrzeug in das Benzinlager eingefahren ist.The present invention relates to electrical switches, such as those used as signaling or warning switches in the forecourts of petrol stations, Gasoline bearings or the like can be used. These switches are usually in the form of an elongated tube. Drive in Vehicle via such pipe switches, the rise in pressure in the pipe causes a pair of electrical contacts to close, whereby an electrical warning circuit is closed, which for example activates a clamp or another warning signal, to indicate that a vehicle has entered the gasoline depot.

Diese bekannten Schalter sind in herstellungstechnischer Beziehung schwierig und weisen betriebstechnische Mangel auf. Die vorliegende Erfindung hat sich die Aufgabe gestellt, diese Mangel zu beseitigen.These known switches have a manufacturing relationship difficult and have operational deficiencies. The present Invention has set itself the task of eliminating this deficiency.

Diese Aufgabe löst die Erfindung durch einen elektrischen Schalter, welcher einen ersten länglichen und flexiblen Leiter aufweist, dem ein zweiter länglicher flexibler leiter zugeordnet ist, wobei die beiden Leiter längs ihrer gesamten Ausdehnung durch ein deformiafcares isolierendes Element voneinander getrennt sind, in das elektrisch leitende Partikel eingelagert sind, die beim Auftreten eines Druckes, welcher den Abstand zwischen erstem und zweitem Leiter vermindert, eine elektrisch leitende Ve rDindung zwischen den beiden Leiter herstellt.This object is achieved by the invention by an electrical switch which has a first elongated and flexible conductor to which a second elongated flexible conductor is assigned, the two conductors being separated from each other along their entire extension by a deformable insulating element, in the electrically conductive particle are incorporated, which produces between the two conductor upon the occurrence of a pressure, which reduces the distance between the first and second conductors, an electrically conductive V e r Di n dung.

Der erste Leiter hat vorzugsweise die Form eines Drahtes, Kabels, Stabes oder dgl., während das isolierende Element die Form einerThe first conductor is preferably in the form of a wire, cable, Rod or the like. While the insulating member has the shape of a

— 2 —- 2 -

309832/0953309832/0953

Hülse auf wegist, innerhalb der sich der erste Leiter erstreckt · Der zweite Leiter kann die Form eines leitenden Litzengewebes haben, welche das isolierende Element umgibt.Sleeve within which the first conductor extends The second conductor can be in the form of a conductive braid which surrounds the insulating element.

Im allgemeinen wird der erfindungsgemäße elektrische Schalter außerdem mit einer flexiblen äußeren Schutzhülse versehen.In general, the electrical switch according to the invention is also provided with a flexible outer protective sleeve.

In der anliegenden Zeichnung ist das elektrische Warnsystem, welches einen erfindungsgemäßen Schalter verwendet, schematisch dargestellt.In the accompanying drawing, the electrical warning system using a switch according to the invention is schematic shown.

Der Schalter 11 weist bei dem veranschaulichten Ausführungsbeispiel als ersten elektrischen Leiter einen Kupferdraht 12 auf. Der Draht 12 wird von einer Isolierhülse 13 umgeben, welche aus einem elastisch deformierbaren Isoliermaterial besteht, in welchem elektrisch leitende Partikel in Abstand voneinander eingelagert sind. Beim Anlegen eines bestimmten Druckes auf die Isolierhülse werden die nebeneinanderliegenden leitenden Partikel miteinander in Berührung gebracht, wodurch der komprimierte Teil· bereich der Isolierhülse 13 !leitend wird. Der erste Leiter 12 erstreckt sich innerhalb der Isolierhülse 13, wobei das Isolierelement 13 eine Hülse bildet, die den Leiter 12 umgibt. Um die Isolierhülse 13 herum ist ein Kupferlitzengewebe 14 vorgesehen. Im nicht belastenden Zustand des isolierenden Elementes 13 dient dieses zur Isolierung des Kupferlitzengewebes 14 vom Kupferdraht 12- Sowohl der Kupferdraht 12 als auch das Gewebe 14 sind flexibel. Wenn das Element 13 an irgendeiner Stelle seiner Längsausdehnung so deformiert wird, daß ein Teil des Litzengewebes 14 sich dem Draht 12 nähert, so entsteht in dem komprimierten Bereich des Elementes 13 eine elektrische Leitfähigkeit, so daß zwischen dem Litzengewebe 14 und dem Draht 12 in diesem Bereich eine leitende Verbindung entsteht.The switch 11 has in the illustrated embodiment a copper wire 12 as the first electrical conductor. The wire 12 is surrounded by an insulating sleeve 13, which is made of an elastically deformable insulating material in which electrically conductive particles are embedded at a distance from one another. When applying a certain pressure to the insulating sleeve the adjacent conductive particles are brought into contact with each other, whereby the compressed part area of the insulating sleeve 13! is conductive. The first conductor 12 extends inside the insulating sleeve 13, the insulating element 13 forming a sleeve which surrounds the conductor 12. Around the insulating sleeve 13 around a copper braid 14 is provided. In the non-stressful state of the insulating element 13 is used this to isolate the copper braided fabric 14 from the copper wire 12- Both the copper wire 12 and the fabric 14 are flexible. If the element 13 at any point in its longitudinal extension is deformed so that a portion of the braided fabric 14 approaches the wire 12, so arises in the compressed area of the element 13 an electrical conductivity, so that between the braided fabric 14 and the wire 12 in this area a conductive connection is established.

Der durch den Draht 12, das Isolierelement 13 und das Litzengewebe 14 gebildete Schalter kann irgendeine gewünschte Längsaus-The through the wire 12, the insulating element 13 and the braided fabric 14 switch can have any desired lengthwise

- 3 3 09832/0958- 3 3 09832/0958

dehnung aufweisen und kann z.B. auf Trommeln aufgewickelt werden. Insbesondere ist der Schalter geeignet für Verkehrszählungen und Verkehrslenkungen oder als Warnsystem, bei welchem der Schalter in seiner Längsausdehnung quer zu dem Weg eines Fahrzeuges ausgelegt wird. Sobald das Fahrzeug über den Schalter fährt, wird ein elektrischer Kreis geschlossen, so daß der Schalter beispiels weise zur Steuerung der Vorrichtung 15 dienen kann, die als Schelle oder Summer eines Warnsystems ausgebildet ist. In Monitorsystemen kann beispielsweise der erfindungsgemäße Schalter die Funktion eines Zählers haben.stretch and can be wound onto drums, for example. In particular, the switch is suitable for traffic counts and traffic control or as a warning system in which the switch designed in its longitudinal extent transversely to the path of a vehicle will. As soon as the vehicle drives over the switch, an electrical circuit is closed so that the switch is for example way to control the device 15 can be used as Bell or buzzer of a warning system is designed. In monitor systems, for example, the switch according to the invention have the function of a counter.

Wenn dies zweckmäßig ist, kann das äußere Idtzengewebe 14- durch eine flexible Außenhülse aus isolierendem Material geschützt werden, welche beispielsweise aus einem Polyvinylchlorid bestehen kann. Es versteht sich von selber, daß der Drahtleiter 12 auch dusch ein Kupferlitzenkabel oder dgpL. ersetzt werden kann.If this is appropriate, the outer Idtzenstoff 14- can through a flexible outer sleeve made of insulating material are protected, which for example consist of a polyvinyl chloride can. It goes without saying that the wire conductor 12 can also be a stranded copper cable or dgpL. can be replaced.

AnsprücheExpectations

309832/0958309832/0958

Claims (3)

A η s ρ · r ü c heA η s ρ · r ü c he \1), Elektrischer Schalter, insbesondere für Warnsysteme, bei denen der Schalter durch Druckeinwirkung betätigt wird, dadurch gekennzeichnet, daß der Schalter einen ersten flexiblen länglichen Leiter (12) aufweist, der mittels eines elastisch deformierbaren isolierenden Elementes (13) von einem zweiten länglichen deformierbaren Heiter (1A-) getrennt ist, daß in das isolierende Element (13) elektrisch leitende Partikel so eingelagert sind, daß beim Zusammendrücken des isolierenden Elementes (13) in einer Richtung, in der der Abstand zwischen dem ersten und dem zweiten Heiter vermindert wird, eine leitende Verbindung zwischen beiden Leitern (12, 14-) entsteht.\ 1), electrical switch, in particular for alarm systems, in which the switch is actuated by D r uckeinwirkung, characterized in that the switch comprises a first flexible elongate conductor (12) of a means of an elastically deformable insulating member (13) from second elongated deformable heater (1A-) is separated that in the insulating element (13) electrically conductive particles are embedded so that when compressing the insulating element (13) in a direction in which the distance between the first and the second heater is reduced, a conductive connection between the two conductors (12, 14-) is created. 2) Elektrischer Schalter nach Anspruch■ 1,t dadurch gekennzeichnet, daß der erste Leiter (12) die Form eines; Drahtes oder Kabels hat, während das isolierende Element (13) sich in Form einer Hülse um den ersten Leiter (12) herum erstreckt und daß der zweite Leiter (14) als Litzengewebe ausgebildet ist, welches die Isolierhülse (13) umgibt, ■ "2) Electrical switch according to claim ■ 1, t characterized in that the first conductor (12) has the shape of a; Has wire or cable, while the insulating element (13) extends in the form of a sleeve around the first conductor (12) and that the second conductor (14) is designed as a braided fabric which surrounds the insulating sleeve (13). 3) Schalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Schalter (11) mit einer flexiblen äußeren Schutzhülse versehen ist.3) Switch according to claim 1 or 2, characterized in that the switch (11) is provided with a flexible outer protective sleeve. 3 0 9 8 3 2/09583 0 9 8 3 2/0958
DE2304595A 1972-02-04 1973-01-31 ELECTRIC SWITCH Pending DE2304595A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB527672A GB1406486A (en) 1972-02-04 1972-02-04 Electrical switches

Publications (1)

Publication Number Publication Date
DE2304595A1 true DE2304595A1 (en) 1973-08-09

Family

ID=9793052

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2304595A Pending DE2304595A1 (en) 1972-02-04 1973-01-31 ELECTRIC SWITCH

Country Status (8)

Country Link
US (1) US3794790A (en)
JP (1) JPS4888480A (en)
AU (1) AU476731B2 (en)
DE (1) DE2304595A1 (en)
ES (1) ES411247A1 (en)
FR (1) FR2170084B1 (en)
GB (1) GB1406486A (en)
IT (1) IT977692B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216446A1 (en) * 1982-05-03 1983-11-03 Fa. Andreas Stihl, 7050 Waiblingen SAFETY DEVICE ON A PORTABLE, MOTOR-DRIVEN HAND DEVICE
DE3418589A1 (en) * 1984-05-18 1985-11-21 Hoermann Kg Antrieb Steuertec Monitoring strip for accident protection of a motor-driven gate leaf, door leaf or the like
DE3809960A1 (en) * 1988-03-24 1989-10-05 Bosch Gmbh Robert PINCH PROTECTION SENSOR
DE102011014201B3 (en) * 2011-03-16 2012-08-09 Rehau Ag + Co. Medical tubing for preventing unwanted chewing movements of patient while sleeping, has contacting regions that contact to allow current flow for driving electrical device so that electrical device is vibrated, during chewing motion
DE102012001150A1 (en) * 2012-01-21 2013-07-25 Audi Ag Power cable for connecting power supply with electric motor in e.g. electric car, has portion formed such that contact is produced between electric conductor and ground conductor by action of high pressure on surface of power cable

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1509031A (en) * 1975-04-09 1978-04-26 Peachey G Pressure actuated continuous electrical switch
DE2720252A1 (en) * 1976-05-31 1977-12-22 Bekaert Sa Nv COMPOSITE FENCE WIRE AND FENCE WITH SUCH WIRE
JPS5724456Y2 (en) * 1977-09-09 1982-05-27
DE2744860A1 (en) * 1977-10-05 1979-04-12 Heist Ernst COAXIAL ELECTRIC LONG SWITCH (MESSAGE QUEUE)
FR2475804A1 (en) * 1980-02-12 1981-08-14 Lewiner Jacques IMPROVEMENTS ON COMPOSITE SHEETS CONSTITUTING ELECTROMECHANICAL TRANSDUCERS AND TRANSDUCERS EQUIPPED WITH SUCH SHEETS
DK145809C (en) * 1980-04-17 1983-08-29 Sven Karl Lennart Goof ELECTRICAL CONTACT OR SWITCH DEVICE AND PROCEDURES FOR THE MANUFACTURING OF SUCH A
GB2132426A (en) * 1982-12-23 1984-07-04 Raychem Ltd Conductive-polymer circuit interruptor
JPS6022725U (en) * 1983-07-25 1985-02-16 株式会社　信明産業 pressure sensitive switch wire
US4839480A (en) * 1986-11-05 1989-06-13 The Gates Rubber Company Vehicle sensing device
GB2198237A (en) * 1986-11-17 1988-06-08 John Wilfrid Finch Tactile force sensor
GB2224400B (en) * 1988-09-14 1992-07-08 Gates Rubber Co Electrical sensing element
DE4042496C2 (en) * 1989-04-28 1996-03-07 Riken Kk Safety closure system for automatic door or window
US5051672A (en) * 1989-04-28 1991-09-24 Kabushiki Kaisha Riken Automatic window/door system
US4935699A (en) * 1989-05-15 1990-06-19 Westinghouse Electric Corp. Means to detect and locate pinching and chafing of conduits
GB0011829D0 (en) * 2000-05-18 2000-07-05 Lussey David Flexible switching devices
GB0113905D0 (en) 2001-06-07 2001-08-01 Peratech Ltd Analytical device
US6724195B2 (en) * 2002-03-29 2004-04-20 Jerome R. Lurtz Contact sensor
US20030184309A1 (en) * 2002-03-29 2003-10-02 Lurtz Jerome R. Sensor for measuring changes in ambient conditions
US10260968B2 (en) 2013-03-15 2019-04-16 Nano Composite Products, Inc. Polymeric foam deformation gauge
BR112015022879B8 (en) 2013-03-15 2022-08-30 Univ Brigham Young APPARATUS COMPRISING A UNIFORM COMPOSITE FOAM AND METHOD FOR MEASURING COMPRESSION TENSION USING SUCH APPARATUS
US9857246B2 (en) 2014-09-17 2018-01-02 Sensable Technologies, Llc Sensing system including a sensing membrane
US10405779B2 (en) 2015-01-07 2019-09-10 Nano Composite Products, Inc. Shoe-based analysis system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305717A (en) * 1939-10-23 1942-12-22 Bell Oidric Joseph La Circuit controlling means
US2445660A (en) * 1945-08-17 1948-07-20 Elevator Supplies Co Inc Electric treadle
US3321592A (en) * 1966-07-21 1967-05-23 Miller Bros Safety closure edge
US3509296A (en) * 1967-10-23 1970-04-28 Ncr Co Resilient variable-conductivity circuit controlling means
US3710050A (en) * 1970-09-14 1973-01-09 A Richards Electronic pressure sensitive switch

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3216446A1 (en) * 1982-05-03 1983-11-03 Fa. Andreas Stihl, 7050 Waiblingen SAFETY DEVICE ON A PORTABLE, MOTOR-DRIVEN HAND DEVICE
DE3418589A1 (en) * 1984-05-18 1985-11-21 Hoermann Kg Antrieb Steuertec Monitoring strip for accident protection of a motor-driven gate leaf, door leaf or the like
DE3809960A1 (en) * 1988-03-24 1989-10-05 Bosch Gmbh Robert PINCH PROTECTION SENSOR
DE102011014201B3 (en) * 2011-03-16 2012-08-09 Rehau Ag + Co. Medical tubing for preventing unwanted chewing movements of patient while sleeping, has contacting regions that contact to allow current flow for driving electrical device so that electrical device is vibrated, during chewing motion
DE102012001150A1 (en) * 2012-01-21 2013-07-25 Audi Ag Power cable for connecting power supply with electric motor in e.g. electric car, has portion formed such that contact is produced between electric conductor and ground conductor by action of high pressure on surface of power cable
DE102012001150B4 (en) 2012-01-21 2018-10-18 Audi Ag Device with battery, electric motor and an electric cable connecting the battery and the electric motor

Also Published As

Publication number Publication date
FR2170084B1 (en) 1976-11-05
JPS4888480A (en) 1973-11-20
AU5139673A (en) 1974-07-25
AU476731B2 (en) 1976-09-30
GB1406486A (en) 1975-09-17
IT977692B (en) 1974-09-20
US3794790A (en) 1974-02-26
FR2170084A1 (en) 1973-09-14
ES411247A1 (en) 1976-02-01

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