EP0168378A2 - Interrupteur thermique avec un détecteur de température formé par un disque bimétallique à action brusque - Google Patents

Interrupteur thermique avec un détecteur de température formé par un disque bimétallique à action brusque Download PDF

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Publication number
EP0168378A2
EP0168378A2 EP85890128A EP85890128A EP0168378A2 EP 0168378 A2 EP0168378 A2 EP 0168378A2 EP 85890128 A EP85890128 A EP 85890128A EP 85890128 A EP85890128 A EP 85890128A EP 0168378 A2 EP0168378 A2 EP 0168378A2
Authority
EP
European Patent Office
Prior art keywords
contact
leaf spring
thermal switch
snap
bimetallic snap
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
EP85890128A
Other languages
German (de)
English (en)
Other versions
EP0168378A3 (en
EP0168378B1 (fr
Inventor
Helmut Dipl.-Ing. Bayer
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.)
Electrovac AG
Original Assignee
Electrovac AG
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 Electrovac AG filed Critical Electrovac AG
Publication of EP0168378A2 publication Critical patent/EP0168378A2/fr
Publication of EP0168378A3 publication Critical patent/EP0168378A3/de
Application granted granted Critical
Publication of EP0168378B1 publication Critical patent/EP0168378B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5409—Bistable switches; Resetting means

Definitions

  • the invention relates to a thermal switch with a temperature sensor formed from a bimetallic snap disk, which cooperates with a contact system which has at least one movable contact-carrying or forming contact carrier, wherein the movable contact rests under spring force on at least one fixed contact.
  • a thermal switch is already known.
  • This essentially consists of a bimetallic snap disk arranged on the bottom of a housing, which interacts with a contact system via a vertical, cylindrical transmission element.
  • This contact system consists of a contact bridge and two connecting lugs, the inwardly facing ends of which form two fixed contacts which are connected to one another in the idle state by the contact bridge forming the movable contacts.
  • This contact bridge is pressed against the terminal lug by a hairpin-shaped leaf spring.
  • the leaf spring forms together with the contact bridge the contact carrier carrying the movable contacts, against the end face of which, under the spring force of a further leaf spring, presses a locking member designed as a cylinder.
  • the object of the present invention is to provide a thermal switch of the type described at the outset, which has a particularly simple and reliable construction.
  • This object is achieved in that the contact carrier is designed as a leaf spring that can be pretensioned perpendicular to the snap direction of the thermobimetal snap disk.
  • Another advantageous embodiment of the invention is characterized in that a fixing lug is fastened to the switch housing in the region of the free end of the leaf spring.
  • this nose anchorage in the normal state there is a complete separation of the leaf spring and the bimetallic snap disk, so that no preload forces are transferred from one part to the other or no frictional forces that may affect the functionality, which normally influence the snap temperatures of the would cause bimetallic snap disk.
  • leaf spring is 1-shaped and is attached to the switch housing with one leg, the broad side of the leaf spring being parallel to the snap direction of the bimetallic snap disk.
  • a further advantageous embodiment of the invention consists in that an insulation body and a contact piece are arranged on the side of the leaf spring facing away from the thermobimetal snap disk.
  • FIG. 1 shows a greatly enlarged plan view of a thermal switch designed according to the invention
  • FIG. 2 shows a section along line II-II of FIG. 1
  • a concave thermobimetal snap disk 3 is arranged, which according to the full lines in FIG. 2 is at rest.
  • an I-shaped leaf spring 5 is fastened to the vertical side wall 6 of the switch housing 1 by riveting, soldering, welding or the like.
  • the leaf spring 5 is under prestress and presses in the direction of arrow 7 onto a fixing lug 8 fastened to the switch housing base. This increases in cross-section in the direction of the leaf spring 5 in the form of a ramp.
  • an extension 9 is provided, on which a cylindrical insulation body 10 is attached.
  • an electrically conductive contact piece 11 which bears against two fixed mating contacts 12 and 12 'and thus establishes the passage of current through the mating contact 12 - contact piece 11 and the mating contact 12'.
  • the contacts 12 and 12 ' which rest on the electrically conductive contact piece 11 in the rest state are shown with dashed lines.
  • the curved trained T begins hermobimetallschnappulation 3 continues to heat and to snap upwardly into the position shown in Figure 2 dashed position.
  • This snap movement causes the free end of the leaf spring 5 to be raised above the height of the fixing lug 8, so that the leaf spring will move with its free end over the fixing lug 8 into the rest position shown in broken lines in FIG.
  • the contact piece 11 connected to the spring is moved away from the contacts 12, so that the power supply to the device is interrupted.
  • the restoration of the power supply is particularly easy to carry out in the design of a thermal switch according to the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
EP85890128A 1984-06-15 1985-06-12 Interrupteur thermique avec un détecteur de température formé par un disque bimétallique à action brusque Expired - Lifetime EP0168378B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1966/84 1984-06-15
AT0196684A AT386489B (de) 1984-06-15 1984-06-15 Thermischer schalter mit einem aus einer thermobimetallschnappscheibe gebildeten temperaturfuehler

Publications (3)

Publication Number Publication Date
EP0168378A2 true EP0168378A2 (fr) 1986-01-15
EP0168378A3 EP0168378A3 (en) 1988-07-27
EP0168378B1 EP0168378B1 (fr) 1991-10-23

Family

ID=3524905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85890128A Expired - Lifetime EP0168378B1 (fr) 1984-06-15 1985-06-12 Interrupteur thermique avec un détecteur de température formé par un disque bimétallique à action brusque

Country Status (4)

Country Link
US (1) US4646054A (fr)
EP (1) EP0168378B1 (fr)
AT (1) AT386489B (fr)
DE (1) DE3584481D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259569A1 (de) * 2002-12-19 2004-07-01 Hilti Ag Elektrohandwerkzeugmaschine mit kontaktlosem elektrischen Handschalter
US7766006B1 (en) * 2007-03-09 2010-08-03 Coprecitec, S.L. Dual fuel vent free gas heater
DE102019128367B4 (de) 2019-10-21 2021-06-10 Marcel P. HOFSAESS Temperaturabhängiger schalter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR972785A (fr) * 1941-04-23 1951-02-02 Electro App S A Dispositif thermostatique
US2889430A (en) * 1957-01-11 1959-06-02 Smith Webster Deroyce Thermostats
US3246107A (en) * 1963-11-04 1966-04-12 United Carr Inc Non-resetting thermally responsive switch
DE1413910A1 (de) * 1961-01-07 1969-10-09 Nikolaus Laing Temperaturschutzschalter
AT374619B (de) * 1981-03-05 1984-05-10 Electrovac Thermischer schalter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1513323C3 (de) * 1965-10-15 1974-01-31 Ellenberger & Poensgen Gmbh, 8503 Altdorf Druckknopfbetätigter thermischer Überstromschalter
US4092623A (en) * 1976-07-21 1978-05-30 Mechanical Products Circuit breaker
AT354140B (de) * 1976-07-23 1979-12-27 Electrovac Thermischer schalter
DE2739928C3 (de) * 1977-09-05 1980-11-06 Norbert 5275 Bergneustadt Weiner Temperaturabhängig arbeitender elektrischer Schalter in Flachbauweise
AT383696B (de) * 1982-03-03 1987-08-10 Electrovac Thermischer schalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR972785A (fr) * 1941-04-23 1951-02-02 Electro App S A Dispositif thermostatique
US2889430A (en) * 1957-01-11 1959-06-02 Smith Webster Deroyce Thermostats
DE1413910A1 (de) * 1961-01-07 1969-10-09 Nikolaus Laing Temperaturschutzschalter
US3246107A (en) * 1963-11-04 1966-04-12 United Carr Inc Non-resetting thermally responsive switch
AT374619B (de) * 1981-03-05 1984-05-10 Electrovac Thermischer schalter

Also Published As

Publication number Publication date
DE3584481D1 (de) 1991-11-28
AT386489B (de) 1988-08-25
EP0168378A3 (en) 1988-07-27
ATA196684A (de) 1988-01-15
EP0168378B1 (fr) 1991-10-23
US4646054A (en) 1987-02-24

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