EP0069861A2 - Thermostat pour appareils à chauffage électrique - Google Patents

Thermostat pour appareils à chauffage électrique Download PDF

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Publication number
EP0069861A2
EP0069861A2 EP82104987A EP82104987A EP0069861A2 EP 0069861 A2 EP0069861 A2 EP 0069861A2 EP 82104987 A EP82104987 A EP 82104987A EP 82104987 A EP82104987 A EP 82104987A EP 0069861 A2 EP0069861 A2 EP 0069861A2
Authority
EP
European Patent Office
Prior art keywords
contact spring
temperature switch
contact
disc
bimetallic disc
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.)
Withdrawn
Application number
EP82104987A
Other languages
German (de)
English (en)
Other versions
EP0069861A3 (fr
Inventor
Walter Hollweck
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.)
INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Original Assignee
INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
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 INTER CONTROL Hermann Koehler Electrik GmbH and Co KG filed Critical INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Publication of EP0069861A2 publication Critical patent/EP0069861A2/fr
Publication of EP0069861A3 publication Critical patent/EP0069861A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • H01H2037/5481—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting the bimetallic snap element being mounted on the contact spring

Definitions

  • the invention relates to a temperature switch for monitoring electrically heated devices, with an insulating support on which a contact spring is fastened on one side, which carries a contact at its free end with which it interacts with a mating contact which is also fixedly arranged on the insulating body, electrical connections, and with a bimetal disc, which is in operative connection with the contact spring, so that the contacts are opened or closed when a predetermined temperature is reached.
  • a temperature switch in which a contact spring is attached on one side to an insulating body, which carries at its free end a contact which cooperates with a counter contact fixedly arranged on the insulating body.
  • a contact spring is attached on one side to an insulating body, which carries at its free end a contact which cooperates with a counter contact fixedly arranged on the insulating body.
  • One or more bimetal disks are operatively connected to this contact spring, the bimetal disks having a hole in their center, which is used for concentric mounting on the contact spring.
  • the disadvantage of this design is the limited durability of the bimetallic discs, since the number of possible switching operations is reduced through the center hole. As the switching frequency increases, there is a risk that cracks will appear in the bimetallic disc starting from the center hole, which will lower the original stress state of the disc, resulting in a perfect snap characteristic is no longer guaranteed. This would also affect the switching behavior of the contacts. h, with such bimetallic discs, a momentary opening and closing of the contacts would no longer be possible.
  • OS 29 04 341 proposes to design the contact spring so that the bimetallic disc can be arranged ben without a center hole on the contact spring.
  • the contact spring has an embossed curvature in its center and resilient tabs on its two longitudinal sides, which are firmly connected to the contact spring at one end and angled at their free ends. Both resilient tabs have a slight pre-bend in the same direction as the impressed curvature in the center of the contact spring.
  • the bimetallic disc is held on the one hand by L-shaped tabs which are made out of the contact spring and on the other hand by the resilient tabs located on the long sides.
  • the invention therefore proposes to improve the temperature switch of the type described above to such an extent that a secure holding of the bimetallic disc on the contact spring is ensured, even if the temperature switch is influenced by external mechanical action.
  • the contact spring preferably has an angled extension on its two longitudinal edges, preferably in the middle, which serves to limit the side of the bimetallic disc arranged on the contact spring.
  • the bimetallic disc is arranged on the contact spring in such a way that it is held on the one hand by L-shaped tabs which are made out of the contact spring and on the other hand according to the invention by the angled extensions located on the longitudinal edges of the contact spring.
  • closed longitudinal slots are incorporated in the region of the longitudinal edges of the contact spring, as a result of which the angled extensions are resiliently bent outwards when the bimetal disc is attached to the contact spring, without the entire contact spring being bent.
  • the extension snaps over the edge of the bimetal disc so that it is fixed captively.
  • the L-shaped flaps which are made out of the contact spring, are bent obliquely upwards with the legs directed towards the center, so that the opening width between the leg ends and the contact spring thereby increased ensures that the bimetallic disc is inserted quickly.
  • This design of the contact spring is particularly advantageous because the easy assembly of the bimetallic disc enables automatic production to work more smoothly.
  • Tilting of the bimetallic disc is no longer possible due to the flat shape of the contact spring.
  • the bimetallic disc When the bimetallic disc is heated, it is supported with its edge zone on the L-shaped tabs and with its center on an embossed bulge in the center of the contact spring.
  • the contact spring necessarily follows the curvature of the bimetallic disc, so that the contacts are opened.
  • the angled extensions on the longitudinal edges of the contact spring are dimensioned such that in the switched state the edge of the bimetallic disc is lower than the end of the extensions.
  • a contact spring 3 is fastened on one side to the insulating body 1 by means of a rivet 2.
  • the contact spring 3 has a contact 4 at its free end, wel cher interacts with a mating contact 5 also fastened on the insulating body 1.
  • the contact spring 3 is biased towards the counter contact 5.
  • the mating contact 5 is simultaneously formed as a contact rivet by means of which the electrical connection 6 is held on the insulating body 1.
  • the second electrical connection is also fastened by means of the rivet 2.
  • the bimetallic disc 8 is arranged on the contact spring 3 in such a way that it is held on the one hand by L-shaped tabs 9 and 10 issued from the contact spring 3 and on the other hand by the angled extensions 11 and 12 located on the longitudinal edges of the contact spring 3.
  • closed slots 13 and 14 are arranged in the contact spring 3 on their longitudinal edges.
  • the angled extensions 11 and 12 on the contact spring 3 in particular prevent lateral displacement of the bimetal disc 8 in its two switching positions, since the edge zone 18 of the bimetal disc 8 is lower than the end 15, 16 of the extensions 11 and 12.
  • the legs 19 and 20 of the L-shaped tabs 9 and 10 directed towards the center are bent obliquely upwards, so that the opening width thereby increased between the leg ends 21 and 22 and the contact spring 3 ensures rapid insertion of the bimetal disk 8.
  • the bimetallic disc 8 If the bimetallic disc 8 is heated, its direction of curvature changes momentarily. It is supported with its center on the embossed curvature 17 in the center of the contact spring 3 and with its edge zone 18 on the L-shaped tabs 9 and 10 of the contact spring 3. The contact spring 3 thereby forcibly follows the curvature of the bimetallic disc 8, so that the contacts 4 and 5 are opened.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
EP82104987A 1981-07-15 1982-06-08 Thermostat pour appareils à chauffage électrique Withdrawn EP0069861A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3127852 1981-07-15
DE8120660U DE8120660U1 (de) 1981-07-15 1981-07-15 Temperaturschalter für elektrisch beheizte Geräte
DE19813127852 DE3127852A1 (de) 1981-07-15 1981-07-15 Temperaturschalter fuer elektrisch beheizte geraete

Publications (2)

Publication Number Publication Date
EP0069861A2 true EP0069861A2 (fr) 1983-01-19
EP0069861A3 EP0069861A3 (fr) 1984-10-17

Family

ID=25794583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104987A Withdrawn EP0069861A3 (fr) 1981-07-15 1982-06-08 Thermostat pour appareils à chauffage électrique

Country Status (3)

Country Link
US (1) US4445107A (fr)
EP (1) EP0069861A3 (fr)
DE (2) DE8120660U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703826A1 (de) * 1987-02-07 1988-08-18 Limitor Ag Elektrischer thermobimetallschalter
EP4539082A1 (fr) * 2023-10-10 2025-04-16 Marcel P. Hofsaess Mécanisme de commutation dépendant de la température et interrupteur dépendant de la température doté d'un tel mécanisme de commutation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139091C2 (de) * 1991-11-28 2002-02-07 Hofsaes Geb Zeitz Temperaturschalter in einem dichten Gehäuse
JP3787482B2 (ja) * 2000-04-17 2006-06-21 ウチヤ・サーモスタット株式会社 サーマルプロテクタ
DE112006002712B4 (de) * 2005-10-14 2011-10-27 Uchiya Thermostat Co., Ltd. Temperaturschalter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT292102B (de) * 1969-12-09 1971-08-10 Electrovac Hacht & Huber Fabri Thermischer Schalter und Verfahren zu dessen Herstellung
JPS5074173A (fr) * 1973-11-06 1975-06-18
DE2613767A1 (de) * 1976-03-31 1977-10-13 Thermostat & Schaltgeraetebau Temperaturregler
FR2426326A1 (fr) * 1978-05-17 1979-12-14 Inter Control Koehler Hermann Thermostat pour appareils chauffes electriquement
DE7814776U1 (de) * 1978-05-17 1982-07-08 Inter Control Hermann Köhler Elektrik GmbH & Co KG, 8500 Nürnberg Temperaturschalter für elektrisch beheizte Geräte
DE2904341C2 (de) * 1979-02-06 1984-01-12 Inter Control Hermann Köhler Elektrik GmbH & Co KG, 8500 Nürnberg Temperaturschalter für elektrisch beheizte Geräte
DE2831198C2 (de) * 1978-07-15 1982-11-04 Limitor AG, 8022 Zürich Bimetalltemperaturschalter
DE3104827A1 (de) * 1981-02-11 1982-08-19 Limitor AG, 8022 Zürich "bimetalltemperaturschalter"

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703826A1 (de) * 1987-02-07 1988-08-18 Limitor Ag Elektrischer thermobimetallschalter
EP4539082A1 (fr) * 2023-10-10 2025-04-16 Marcel P. Hofsaess Mécanisme de commutation dépendant de la température et interrupteur dépendant de la température doté d'un tel mécanisme de commutation

Also Published As

Publication number Publication date
DE3127852A1 (de) 1983-02-03
DE8120660U1 (de) 1990-08-16
EP0069861A3 (fr) 1984-10-17
DE3127852C2 (fr) 1989-09-28
US4445107A (en) 1984-04-24

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Withdrawal date: 19850622

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HOLLWECK, WALTER