EP0542695A2 - Druckschalter mit einem handbetätigten Sicherheitsmikroschalter - Google Patents

Druckschalter mit einem handbetätigten Sicherheitsmikroschalter Download PDF

Info

Publication number
EP0542695A2
EP0542695A2 EP92830549A EP92830549A EP0542695A2 EP 0542695 A2 EP0542695 A2 EP 0542695A2 EP 92830549 A EP92830549 A EP 92830549A EP 92830549 A EP92830549 A EP 92830549A EP 0542695 A2 EP0542695 A2 EP 0542695A2
Authority
EP
European Patent Office
Prior art keywords
pressure switch
membrane
microswitch
reed
manually operated
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
EP92830549A
Other languages
English (en)
French (fr)
Other versions
EP0542695A3 (en
EP0542695B1 (de
Inventor
Ennio c/o MA-TER S.r.l. Omati
Marco c/o MA-TER S.r.l. Omati
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.)
MA-TER Srl
Original Assignee
MA-TER Srl
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 MA-TER Srl filed Critical MA-TER Srl
Publication of EP0542695A2 publication Critical patent/EP0542695A2/de
Publication of EP0542695A3 publication Critical patent/EP0542695A3/en
Application granted granted Critical
Publication of EP0542695B1 publication Critical patent/EP0542695B1/de
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
    • 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
    • H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm

Definitions

  • the present invention relates to a touch pressure switch including a manually operated safety switch.
  • pressure switches which include a metal membrane which, in order to provide a proper tightness, is hot sealed, circumferentially, about the annular edge of a cap.
  • the aim of the present invention is to overcome the above mentioned problems, by providing a touch pressure switch, including a manually operated safety microswitch, which allows a perfect tightness of the membrane without performing any hot sealing operations, so as not to undesirably change the resilient characteristics of the membrane, while providing a very high accuracy and evenness of operation.
  • a main object of the present invention is to provide such a touch pressure switch, in which the driving tappet assembly is directly formed on the membrane, without using additional elements susceptible to alter the membrane resiliency.
  • Yet another object of the present invention is to provide such a touch pressure switch the operation threshold values of which can be quickly and simply changed and which, accordingly, can be used in a very broad range of applications, while providing a very safe and reliable operation.
  • a touch pressure switch including a manually operated microswitch, characterized in that it comprises a bottom body defining a chamber communicating with a fluid to be controlled, and associated, through a blade or reed contact bearing ring element, with a top cap, said chamber being closed by a membrane provided with a sealing O-ring element and connected to a steel membrane, with a driving tappet assembly directly formed on this latter membrane and operating on a washer element, counterbiassed by a first counterbiassing spring and affecting at least a blade or reed-like contact, supported by said contact bearing ring element, a safety manually operated microswitch being moreover provided which cooperates with a pin element extending from said washer.
  • the touch pressure switch including a manually operated or re-armed microswitch, according to the present invention, which has been generally indicated at the reference number 1, comprises a bottom body 2, which, in its inside, defines a chamber 3 communicating with an inlet duct 4 in turn connected to a region therein a fluid the pressure of which is to be controlled is held.
  • a top cap 5 To the bottom body 2 there is coupled a top cap 5, through the interposition of a blade or reed contact bearing ring element 6, said cap being restrained, with respect to said bottom body 2, by means of an outer metal edged portion 7.
  • the chamber 3 is closed by a rubber membrane 10 which is provided, on its periphery, with an O-ring element 11 providing fluid tightness.
  • the rubber or silicone rubber membrane 10 is coupled to a metal membrane 12, in particular a stainless steel membrane, which is held in its set position by means of a safe ring element 13, arranged between the reed contact bearing ring element 6 and said membrane, so as to provide a perimetrical clamping force.
  • That same safety ring element 13, moreover, will prevent the membrane 12 from being deformed or broken, as the pressure switch must be adjusted by operating the dowel element 32.
  • the metal membrane 12 is provided, at a central portion thereof, with a driving tappet assembly 15, which is directly provided as a single piece with said membrane 12, for example by means of mechanical pressing operations, and axially operates on or affects a washer element 20 which is slidably guided inside the cap 5.
  • the washer element 20 is pushed or counterbiassed by a first counterbiassing spring 21, operating between said washer element and an adjusting screw 22, which latter rotatably engages in a threaded hole 23 formed in the cap.
  • a stem element 25 is provided, extending from the washer element and engaging in a guide hole 26, axially formed through said adjusting screw 22, and between this adjusting screw and the spring 21 a sliding element 27 is interposed.
  • the washer element 20 operates on the reed contacts 30 provided on the contact bearing discs 6 (see figures 1 and 2) and which has a C-shape configuration, therefrom a fixed contact 31 projects, which projects outwardly from the cap, whereas on the two resiliently movable arms 30a and 30b operate pin elements 35 provided on the washer 20 and engaging with said contacts.
  • the reed contacts are cut to a desired shape about a contact pad, so as to provide the reed element with a desired flexibility property, at the push point, and, moreover, they can be moved towards one another by means of screws.
  • the reed contacts 30a and 30b cooperate with respective fixed contacts, indicated at the reference number 36, which connect with outer fixed contacts 37 projecting from the cap.
  • a safety microswitch, indicated at 40 is moreover provided, preferably of the manually operated or rearmed type, which is coupled to the cap by means of a supporting plate 41 made for example of ryton, and being provided with a small lever 42 operating on the push-button 43 of the microswitch, and with which a pin element 44 engages which is connected to the washer.
  • a broad adjusting range that is a broad operation threshold range
  • for the safety microswitch which can be obtained by providing a slot through the small plate allowing a clockwise displacement or, if desired, this can be obtained by changing the operating position by means of a screw provided with a related counterbiassing spring.
  • the above disclosed arrangement allows to adjust at will, within very broad ranges, all of the pressure switch operating threshold values, by operating the adjusting screws 22 affecting the position of the reed contacts and that of the driving pin elements.
  • a touch pressure switch construction including a safety microswitch, which allows a perfect tightness to the fluid to be controlled, without using heat sealing operations and which, moreover, allows to change within very broad ranges, all of the calibrating values.
  • the subject pressure switch can be also provided with a working or operating microswitch.
  • the used materials provided that they are compatible to the intended use, as well as the contingent size and shapes can be any according to requirements.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Push-Button Switches (AREA)
  • Switches With Compound Operations (AREA)
EP92830549A 1991-11-15 1992-10-01 Druckschalter mit einem handbetätigten Sicherheitsmikroschalter Expired - Lifetime EP0542695B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI913049A IT1252296B (it) 1991-11-15 1991-11-15 Pressostato a sfioro, con microinterruttore di sicurezza a riarmo manuale
ITMI913049 1991-11-15

Publications (3)

Publication Number Publication Date
EP0542695A2 true EP0542695A2 (de) 1993-05-19
EP0542695A3 EP0542695A3 (en) 1993-07-28
EP0542695B1 EP0542695B1 (de) 1996-07-03

Family

ID=11361112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92830549A Expired - Lifetime EP0542695B1 (de) 1991-11-15 1992-10-01 Druckschalter mit einem handbetätigten Sicherheitsmikroschalter

Country Status (5)

Country Link
EP (1) EP0542695B1 (de)
AT (1) ATE140101T1 (de)
DE (1) DE69211955T2 (de)
ES (1) ES2091447T3 (de)
IT (1) IT1252296B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1012560A3 (nl) * 1999-03-18 2000-12-05 Stuvex Internat N V Druksensor.
CN102222586A (zh) * 2011-06-23 2011-10-19 邱凌众 一种即热式电热水龙头
CN102810431A (zh) * 2011-06-01 2012-12-05 瑞士富巴自动化控制股份有限公司 差压开关
CN104048081A (zh) * 2014-05-29 2014-09-17 湖北三江航天红峰控制有限公司 一种天然气安全阀
CN104362038A (zh) * 2014-10-29 2015-02-18 余姚市嘉荣电子电器有限公司 风压开关
WO2015158640A1 (en) * 2014-04-14 2015-10-22 Ma-Ter S.R.L. Device for signalling the presence of pressure inside a plant, duct or space in general
CN117912875A (zh) * 2024-03-19 2024-04-19 创景传感工业(惠州)有限公司 一种座椅占位微动开关

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017213245B4 (de) * 2017-08-01 2021-02-04 Siemens Aktiengesellschaft Schalter, insbesondere Niederspannungs-Leistungsschalter, mit einer Signalisierung der Abnutzung seiner Kontaktauflagen und Einrichtung zur Signalisierung der Abnutzung
DE102019212681B4 (de) * 2019-08-23 2021-03-25 Inelta Sensorsysteme Gmbh & Co. Kg Membrandruckschalter und Verfahren zur Einstellung eines Schaltpunktes eines Membrandruckschalters

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1543230A (fr) * 1900-01-01 Perfectionnements aux dispositifs de réglage thermique à sécurité incorporée
DE1147651B (de) * 1960-06-04 1963-04-25 Bosch Gmbh Robert Durch ein Druckmittel betaetigbarer elektrischer Biegehautschalter
GB1217480A (en) * 1968-06-18 1970-12-31 Patinvest Electric pressure-controlled snap switch
FR2121794A1 (de) * 1971-01-12 1972-08-25 Danfoss As
US3898405A (en) * 1974-01-11 1975-08-05 Ernesto Juan Weber Diaphragm pressure switch with balance plate and adjustable springs
EP0058409A2 (de) * 1981-02-12 1982-08-25 Eaton S.A.M. Druckbetätigte elektrische Schaltvorrichtung
EP0265391A2 (de) * 1986-10-20 1988-04-27 SICEB S.p.A. Dreistufiger Regler für Kraftfahrzeugklimaanlagen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1543230A (fr) * 1900-01-01 Perfectionnements aux dispositifs de réglage thermique à sécurité incorporée
DE1147651B (de) * 1960-06-04 1963-04-25 Bosch Gmbh Robert Durch ein Druckmittel betaetigbarer elektrischer Biegehautschalter
GB1217480A (en) * 1968-06-18 1970-12-31 Patinvest Electric pressure-controlled snap switch
FR2121794A1 (de) * 1971-01-12 1972-08-25 Danfoss As
US3898405A (en) * 1974-01-11 1975-08-05 Ernesto Juan Weber Diaphragm pressure switch with balance plate and adjustable springs
EP0058409A2 (de) * 1981-02-12 1982-08-25 Eaton S.A.M. Druckbetätigte elektrische Schaltvorrichtung
EP0265391A2 (de) * 1986-10-20 1988-04-27 SICEB S.p.A. Dreistufiger Regler für Kraftfahrzeugklimaanlagen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1012560A3 (nl) * 1999-03-18 2000-12-05 Stuvex Internat N V Druksensor.
CN102810431A (zh) * 2011-06-01 2012-12-05 瑞士富巴自动化控制股份有限公司 差压开关
CN102810431B (zh) * 2011-06-01 2016-08-24 瑞士富巴自动化控制股份有限公司 差压开关
CN102222586A (zh) * 2011-06-23 2011-10-19 邱凌众 一种即热式电热水龙头
CN102222586B (zh) * 2011-06-23 2014-05-14 邱凌众 一种即热式电热水龙头
WO2015158640A1 (en) * 2014-04-14 2015-10-22 Ma-Ter S.R.L. Device for signalling the presence of pressure inside a plant, duct or space in general
CN104048081A (zh) * 2014-05-29 2014-09-17 湖北三江航天红峰控制有限公司 一种天然气安全阀
CN104362038A (zh) * 2014-10-29 2015-02-18 余姚市嘉荣电子电器有限公司 风压开关
CN117912875A (zh) * 2024-03-19 2024-04-19 创景传感工业(惠州)有限公司 一种座椅占位微动开关

Also Published As

Publication number Publication date
DE69211955D1 (de) 1996-08-08
EP0542695A3 (en) 1993-07-28
EP0542695B1 (de) 1996-07-03
ATE140101T1 (de) 1996-07-15
ES2091447T3 (es) 1996-11-01
IT1252296B (it) 1995-06-08
ITMI913049A0 (it) 1991-11-15
ITMI913049A1 (it) 1993-05-15
DE69211955T2 (de) 1997-02-27

Similar Documents

Publication Publication Date Title
US2636093A (en) Pressure switch
US4091249A (en) Pressure sensitive electrical switch having a snap element
US3516279A (en) Method for adjusting a pressure operated switch utilizing the nonlinear properties of a biasing means
EP0542695B1 (de) Druckschalter mit einem handbetätigten Sicherheitsmikroschalter
US4900883A (en) Fluid-operated compound switch
US4794214A (en) Fluid pressure responsive electrical switch
US2934618A (en) Fluid pressure responsive switch
US5471022A (en) Pneumatic acutated switch
GB1524686A (en) Temperature responsive swotching device
US2720564A (en) Fluid pressure responsive switch
US6346681B1 (en) Pressure switch
US5369233A (en) Safety pressure sensor, in particular for microswitches
US4317971A (en) Adjustable pressure and vacuum limit switch valve
US4104495A (en) Pressure switch and actuating means responsive to low pressure
US4891479A (en) Control actuator and switch
US5548266A (en) Thermostat construction
US3293394A (en) Temperature responsive control device with snap acting switch
CN107610974B (zh) 一种风压开关
US3182149A (en) Pressure-operated control having means for adjusting the actuating pressures of a plurality of control switches
US3274362A (en) Adjustable fluid pressure operated electric switch
US3366760A (en) Pressure switch assembly
GB1464637A (en) Pressure switch
US4048455A (en) Pressure switch with plural axes pivoted conduction plate
EP0542696B1 (de) Druckschalter mit einem handbetätigten Sicherheitsmikroschalter
US5661274A (en) Precision double-pole single-throw switch assembly

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: A2

Designated state(s): AT CH DE ES FR GB LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RHK1 Main classification (correction)

Ipc: H01H 35/34

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH DE ES FR GB LI NL SE

17P Request for examination filed

Effective date: 19931123

17Q First examination report despatched

Effective date: 19951108

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB LI NL SE

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

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960703

Ref country code: AT

Effective date: 19960703

REF Corresponds to:

Ref document number: 140101

Country of ref document: AT

Date of ref document: 19960715

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69211955

Country of ref document: DE

Date of ref document: 19960808

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

Ref country code: SE

Effective date: 19961003

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: CABINET ROLAND NITHARDT CONSEILS EN PROPRIETE INDU

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2091447

Country of ref document: ES

Kind code of ref document: T3

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970924

Year of fee payment: 6

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

Ref country code: DE

Payment date: 19970927

Year of fee payment: 6

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

Ref country code: ES

Payment date: 19971015

Year of fee payment: 6

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

Ref country code: FR

Payment date: 19971031

Year of fee payment: 6

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

Ref country code: CH

Payment date: 19980129

Year of fee payment: 6

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

Ref country code: GB

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

Effective date: 19981001

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

Ref country code: ES

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

Effective date: 19981002

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

Ref country code: LI

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

Effective date: 19981031

Ref country code: CH

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

Effective date: 19981031

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

Effective date: 19981001

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: 19990630

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: DE

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

Effective date: 19990803

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19991113