EP0190952A1 - Manokontakt mit zwei Schwellen - Google Patents

Manokontakt mit zwei Schwellen Download PDF

Info

Publication number
EP0190952A1
EP0190952A1 EP86400034A EP86400034A EP0190952A1 EP 0190952 A1 EP0190952 A1 EP 0190952A1 EP 86400034 A EP86400034 A EP 86400034A EP 86400034 A EP86400034 A EP 86400034A EP 0190952 A1 EP0190952 A1 EP 0190952A1
Authority
EP
European Patent Office
Prior art keywords
contact
pressure
pressure switch
cup
movable
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
EP86400034A
Other languages
English (en)
French (fr)
Other versions
EP0190952B1 (de
Inventor
Jacques Boulet
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.)
Jaeger SA
Original Assignee
Jaeger SA
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 Jaeger SA filed Critical Jaeger SA
Publication of EP0190952A1 publication Critical patent/EP0190952A1/de
Application granted granted Critical
Publication of EP0190952B1 publication Critical patent/EP0190952B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01H35/2657—Details with different switches operated at substantially different pressures

Definitions

  • the present invention relates to a pressure switch, such as those allowing the monitoring of a working pressure whose variations, beyond a predetermined threshold, must be reported, and more particularly a pressure switch with two thresholds.
  • Such devices are used to detect an abnormal drop in pressure, for example for the oil pressure of a motor vehicle oil pump, or to detect an abnormal increase in pressure, for example for enclosures containing gas at high pressure.
  • a warning light is then essential to avoid dangerous consequences created by such pressure variations beyond a single predetermined one.
  • Most of the existing devices only include a mobile contact member, but it is advantageous, for certain applications, to be able to have two detection thresholds, the first corresponding to a simple alert, the second corresponding to a dangerous threshold to be not exceed, and generally requiring a stop of operation.
  • the existing double threshold devices have a complicated structure, requiring the use of a large number of parts, and do not always have a high reliability, both mechanical and electrical.
  • a typical double threshold device is described in French patent No. 2,513,313, illustrating a pressure switch comprising an insulating housing carrying contact tabs, and a cavity of which allows a mobile insulating member supporting contact members to be accommodated, a conductive fixed cup, said cup being traversed by a pusher which is in contact with a membrane whose other face is subjected to the action of a pressure, and elastically deformable means tending to hold the contact members against the cup fixed conductive, said contact members cooperating with said cup to open or close an electrical circuit comprising said contact tabs, depending on the values of the pressure-acting on the membrane with respect to two predetermined thresholds.
  • the structure of this device is complicated, in particular for the conductive fixed cup which is in the form of a timpani, the bottom of which is pierced with several openings, and for the contact member associated with three branches.
  • the constituent elements are arranged on either side of the bottom of the timpani, which has the consequence first of all of complicating the structure and the functioning, and then of presenting extreme positions where one contact is closed while the other is open, which requires an external relay if you want to have two break contacts.
  • control and / or warning devices in particular for hydraulic lubrication or braking circuits, which are both reliable and precise. , and a competitive manufacturing cost.
  • the object of the invention is to propose a two-threshold pressure switch, allowing control and / or alert in the event of abnormal pressure variations, and which is of simple structure, and of lasting reliability and precision.
  • Another object of the invention is to allow use both for abnormal increases and abnormal decreases in pressure.
  • Another object of the invention is to have a pressure switch which can immediately replace an existing device, without complicated disassembly.
  • a two-threshold pressure switch comprising an insulating housing carrying contact tabs, and a cavity of which makes it possible to accommodate a movable insulating member supporting contact members, a fixed conductive cup, said cup being traversed by a pusher which is in contact with a membrane whose other face is subjected to the action of a pressure, and elastically deformable means tending to hold the contact members against the fixed conductive cup, said contact members cooperating with said cup to open or close an electrical circuit comprising said contact tabs, as a function of the values of the pressure acting on the membrane with respect to two predetermined thresholds, characterized in that the fixed conductive cup serves as a bottom for the cavity of the insulating housing, so that the movable insulating member , the contact members and the holding means are all arranged on the same side of said cup, and in that the insulating movable member is a sleeve externally carrying a first contact member and internally a second contact member, and having outer and inner stops
  • the first position corresponds to normal pressure
  • the second and third positions correspond to two predetermined thresholds for a pressure increase
  • the third position corresponds to normal pressure
  • the second and first positions correspond at two predetermined thresholds for a pressure drop.
  • the means for holding the contact members are advantageously coaxial springs, housed in the cavity of the insulating housing, said springs ensuring the electrical connection between a contact member and the associated contact tongue.
  • the sleeve constituting the insulating movable member may have externally and internally a longitudinal groove receiving a tab of the associated contact members, bent in the direction of the conductive fixed cup for a contact stop against said cup.
  • the sleeve directly on the end of the pusher; said end of the pusher extends inside the movable member to form a stop with a central protuberance of the insulating housing, said protrusion protruding from a wall of said housing traversed by the contact tabs, and passes through a bottom of the movable member, the inner face of which constitutes the stop for the contact member mounted inside said movable member, said contact member having a curved tab passing through said bottom.
  • the end of the pusher then serves as a guide for the spring holding the contact member inside the movable member against the bottom of said movable member.
  • the pressure switch shown comprises an insulating boot 1 intended to be fixed, preferably by crimping, to a metal body 2 (generally hexagonal, having a threaded end), the central bore 3 of which allows a working pressure shown diagrammatically by the arrow 4.
  • the boot 1 has at one end, in known manner, two open housings allowing the insertion of lugs for the electrical connection with two flat contact tabs 5, 6, with a partition wall 7.
  • the tabs 5, 6 pass through a wall 8 of the housing 1; on each side of this wall, each tab has a conventional portion for connection from the outside of the housing, and a portion, in the form of which we will return later, inside a cavity 9 opening out at the other end of said housing and making it possible to house the movable contact members of the pressure switch.
  • a conductive cup 10 serving as the bottom of the cavity 9, and being traversed in its center by a pusher 11 made of insulating material.
  • This pusher 11 is in contact with a membrane 12 whose peripheral edge is pinched between an edge of the cup 10 and a sealing washer-13, the assembly being housed in a corresponding bore of the metal body 2, and being crimped on said body for a good seal; the other face of the membrane 12 is therefore subjected to the working pressure.
  • the conductive cup 10, in electrical connection with the metal body 2 has a conventional bowl shape, which ensures the maintenance of the membrane 12, and prevents pinching thereof, whatever the position of the pusher 11 relative at the bottom of said cup.
  • the pressure switch also includes a movable insulating member 14, housed in the cavity 9 of the housing 1 and mounted directly on the end of the pusher 11 by its bottom 15; the movable member 14 can be held by gluing, or by the combination of a stop and the effect of a spring as illustrated.
  • This movable member 1-4 has the shape of a sleeve, and it supports two contact members 16, 17, slidably mounted.
  • the contact member 16 mounted on the outside of the sleeve 14 has the shape of a washer provided with a lug 18 (initially projecting inward when the washer is cut out), bent in the direction of the conductive cup 10 for a contact stop against said cup; the tab 18 is received in a longitudinal groove 19 of the sleeve 14, which ensures good guidance, without jamming, of the contact member 16.
  • the contact member 17, mounted inside the sleeve 14, has the shape of a washer provided with a tab 20 (protruding initially towards the outside when the washer is cut), curved like the tab 18 in the direction of the conductive cup 10 for a contact stop against said cup; the tab 20 is received in a similar manner in a longitudinal groove 21 of the sleeve 14, and passes through the bottom 15 of the sleeve through a corresponding opening which in fact directly extends said groove 21.
  • the holding means here are coaxial springs, 22 for the internal contact member 17, and 23 for the external contact member 16, which also fulfill an electrical function in addition to their mechanical function, which consists in ensuring the connection connection between a contact member and the associated contact tab.
  • the spring 23 applies the contact member 16, that is to say in fact the tab 18, against the conductive cup 10, while at its other end, it bears against a folded ring 24, of the contact tab 6 this spring is here held in position by a slightly conical wall of the cavity 9.
  • a shim (not shown) catching up with the thickness of the ring 24, or provide an almost complete wide ring forming an overall support for the lower turn.
  • the spring 22 applies the contact member 17, that is to say in fact the lug 20, against the conductive cup 10, while at its other end, it rests against a folded ring 25 of the contact tongue 5; this spring is here held in position by the end of the pusher 11 and by a central protrusion 26 projecting from the wall 8 of the housing. It should be noted that this protuberance 26 forms an extreme stop for the pusher 11, which is better than a simple stop for the washer of the pusher 11 against the bottom of the cup 10.
  • the stop means are advantageously carried by the sleeve 14 itself: here, the bottom 15 forms the internal stop associated with the contact member 17, while a flange 27 (complete or partial) forms the external stop associated with the contact member 16. It goes without saying that to have two thresholds, the stops must correspond to a different axial stroke.
  • the fixed conductive cup serves as a bottom for the cavity of the insulating housing, so that the movable insulating member 14, the contact members 16, 17, and the springs 22, 23 are all arranged on the same side of said cup, which can thus be produced very simply, for example by stamping.
  • This makes it possible to obtain a particularly simple overall structure, with lasting reliability (low risk of jamming, zero risk of crushing a contact in the event of sudden overpressure), and good accuracy (the working section of the membrane remains that of the adjacent end of the pusher, so that a lower spring stiffness is possible).
  • the position illustrated in the single figure is a rest position, occupied by the pressure switch in the absence of pressure.
  • the nominal pressure (arrow 4)
  • the insulating plunger 11 is placed in the vicinity from the bottom of the conductive cup 10 (or against this bottom), so that the stops 15 and 27 keep the tabs 20 and 18 of the associated contact members distant from the opposite face of the cup 10: the associated electrical circuits are therefore open.
  • the applied pressure decreases, the combined action of the springs 22, 23, causes a displacement of the sleeve 14 in the direction of the cup 10: this thus reaches a first threshold for which only the tab 18 is in contact abutment against said cup.
  • the pressure switch of the invention naturally works in both directions. If one is in fact interested in pressure variations in the direction of an overpressure, then the illustrated rest position becomes the position at nominal pressure. If the pressure increases, the sleeve 14 is moved away against the action of the springs 22, 23, until the tab 20 no longer abuts against the cup 10 by the action of the associated stop 15: it is the first threshold. If the pressure increases further, the stop 27 will act on the contact member 16, and the associated tab 18 will also no longer abut against said cup: this is the second threshold.
  • the invention is not limited to the embodiment which has just been described, but encompasses any variant using equivalent means.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Push-Button Switches (AREA)
EP86400034A 1985-01-11 1986-01-09 Manokontakt mit zwei Schwellen Expired EP0190952B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8500376 1985-01-11
FR8500376A FR2576145B1 (fr) 1985-01-11 1985-01-11 Mano-contact a deux seuils

Publications (2)

Publication Number Publication Date
EP0190952A1 true EP0190952A1 (de) 1986-08-13
EP0190952B1 EP0190952B1 (de) 1989-05-17

Family

ID=9315193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400034A Expired EP0190952B1 (de) 1985-01-11 1986-01-09 Manokontakt mit zwei Schwellen

Country Status (5)

Country Link
US (1) US4647739A (de)
EP (1) EP0190952B1 (de)
DE (1) DE3663419D1 (de)
ES (1) ES8702671A1 (de)
FR (1) FR2576145B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101259453B1 (ko) * 2008-08-08 2013-04-29 퀄컴 인코포레이티드 무선 네트워크들에서 측정 갭들을 처리하기 위한 방법 및 장치

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597257B1 (fr) * 1986-04-15 1988-08-05 Jaeger Mano-contact a deux seuils inverses
IT214256Z2 (it) * 1988-04-13 1990-04-24 Turatti Mario Trasmettitore elettrico di pressione dell olio di lubrificazione di un motore a combustione interna
DE10034876C1 (de) * 2000-07-18 2002-02-28 Siemens Ag Kraftfahrzeug-Steuergerät mit integriertem Druckschalter
US6608266B2 (en) * 2001-12-18 2003-08-19 Eaton Corporation Pressure switch with annular electrodes method of making same
US7732722B1 (en) * 2009-02-24 2010-06-08 Honeywell International Inc. Hermetically sealed pressure switch with composite actuation mechanism
CN102436968B (zh) * 2011-09-28 2015-02-18 芜湖市安芜汽车制动元件有限公司 气压信号灯开关

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064094A (en) * 1959-09-28 1962-11-13 American Radiator & Standard Pressure switch for washing machine tub level control
US3121145A (en) * 1960-06-13 1964-02-11 Acf Ind Inc Fluid pressure operated switch
FR2107788A5 (de) * 1970-09-18 1972-05-05 Lucas Industries Ltd
GB1304085A (de) * 1970-09-01 1973-01-24
GB1440756A (en) * 1972-07-26 1976-06-23 Lucas Electrical Ltd Fluid pressure operated switch
FR2513313A1 (fr) * 1981-09-22 1983-03-25 Turatti Mario Transmetteur electrique de pression, utilisable pour commander des signaleurs electriques de la pression d'huile dans le circuit de lubrification de moteurs a combustion interne
FR2521341A1 (fr) * 1982-02-08 1983-08-12 Jaeger Contacteur manometrique pour vehicules automobiles et procede de realisation du support isolant des elements conducteurs pour celui-ci

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343974A (en) * 1979-05-29 1982-08-10 Hi-Stat Manufacturing Company, Inc. Multi-circuit electrical switch
US4591677A (en) * 1985-02-07 1986-05-27 Tgk Company, Limited Three-function pressure switch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064094A (en) * 1959-09-28 1962-11-13 American Radiator & Standard Pressure switch for washing machine tub level control
US3121145A (en) * 1960-06-13 1964-02-11 Acf Ind Inc Fluid pressure operated switch
GB1304085A (de) * 1970-09-01 1973-01-24
FR2107788A5 (de) * 1970-09-18 1972-05-05 Lucas Industries Ltd
GB1440756A (en) * 1972-07-26 1976-06-23 Lucas Electrical Ltd Fluid pressure operated switch
FR2513313A1 (fr) * 1981-09-22 1983-03-25 Turatti Mario Transmetteur electrique de pression, utilisable pour commander des signaleurs electriques de la pression d'huile dans le circuit de lubrification de moteurs a combustion interne
FR2521341A1 (fr) * 1982-02-08 1983-08-12 Jaeger Contacteur manometrique pour vehicules automobiles et procede de realisation du support isolant des elements conducteurs pour celui-ci

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101259453B1 (ko) * 2008-08-08 2013-04-29 퀄컴 인코포레이티드 무선 네트워크들에서 측정 갭들을 처리하기 위한 방법 및 장치

Also Published As

Publication number Publication date
FR2576145B1 (fr) 1987-04-03
EP0190952B1 (de) 1989-05-17
ES551406A0 (es) 1987-01-01
DE3663419D1 (en) 1989-06-22
US4647739A (en) 1987-03-03
FR2576145A1 (fr) 1986-07-18
ES8702671A1 (es) 1987-01-01

Similar Documents

Publication Publication Date Title
FR2588413A1 (fr) Interrupteur etanche a bouton-poussoir
EP0595698A1 (de) Anlassrelais für die Brennkraftmaschine eines Kraftfahrzeugs
EP0190952B1 (de) Manokontakt mit zwei Schwellen
EP0456781B1 (de) Verstopfungsindikator
EP1042155B1 (de) Kugelgelenk für eine kraftfahrzeuglenkung
EP0412444B1 (de) Elektrischer Verbinder und Vorrichtung, die einen elektrischen Verbinder und einen gemeinsamen Kontakt einschliesst
FR2566172A1 (fr) Interrupteur manometrique perfectionne
EP0194179B1 (de) Selbsteinstellbarer Bowdenzug mit elektrischem Taster zur Funktionsanzeige
EP0540398B1 (de) Verbindungsbaugruppe vom Typ Schaltungsschleife
EP0244290B1 (de) Druckschalter mit zwei entgegengesetzten Schwellwerten
EP0773573A1 (de) Sicherungseinsatz mit Ansprechanzeiger
EP0854539A1 (de) Elektrische schaltungs vorrichtung
EP0302770B1 (de) Thermokontakte mit Schnappscheibe
FR2800506A1 (fr) Dispositif d'amplification du deplacement d'un bouton de manoeuvre d'un interrupteur
BE1012574A6 (fr) Systeme de transmission comprenant un dispositif de detection de rupture de la courroie de transmission, en particulier de la courroie de transmission entre le vilebrequin et l'arbre a cames d'un moteur.
WO2001075335A1 (fr) Disposition d'assemblage de cames sur un arbre de commande commun
FR2587418A1 (fr) Dispositif de commutation electrohydraulique
FR2607328A1 (fr) Fiche coaxiale male de type n
FR2521341A1 (fr) Contacteur manometrique pour vehicules automobiles et procede de realisation du support isolant des elements conducteurs pour celui-ci
EP0777918B1 (de) Schalter für hochfrequenzsignale
EP1213730B1 (de) Verbesserungen für elektrische Schaltvorrichtungen
WO1999020483A1 (fr) Bouton de commande, notamment pour tableau de bord de vehicule automobile
FR2478301A1 (fr) Perfectionnements aux detecteurs de devers de securite pour engins mobiles de travaux publics et applications analogues
FR2869965A1 (fr) Ensemble de roulement et joint homocinetique correspondant
FR3066312A1 (fr) Contacteur de demarreur comprenant un dispositif d'etancheite, et demarreur comprenant un tel contacteur

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): DE FR IT

17P Request for examination filed

Effective date: 19861117

17Q First examination report despatched

Effective date: 19880208

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 3663419

Country of ref document: DE

Date of ref document: 19890622

ITF It: translation for a ep patent filed
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
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19960120

Year of fee payment: 11

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

Ref country code: DE

Effective date: 19971001

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

Ref country code: FR

Payment date: 19971231

Year of fee payment: 13

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

Ref country code: FR

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

Effective date: 19990930

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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 NON-PAYMENT OF DUE FEES

Effective date: 20050109