DE612598C - Bimetal strips heated by direct current flow, especially for thermally controlled switches - Google Patents

Bimetal strips heated by direct current flow, especially for thermally controlled switches

Info

Publication number
DE612598C
DE612598C DENDAT612598D DE612598DD DE612598C DE 612598 C DE612598 C DE 612598C DE NDAT612598 D DENDAT612598 D DE NDAT612598D DE 612598D D DE612598D D DE 612598DD DE 612598 C DE612598 C DE 612598C
Authority
DE
Germany
Prior art keywords
direct current
current flow
controlled switches
thermally controlled
heated
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.)
Expired
Application number
DENDAT612598D
Other languages
German (de)
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens AG
Publication date
Application granted granted Critical
Publication of DE612598C publication Critical patent/DE612598C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element

Description

gesteuerte Schaltercontrolled switches

-Die Erfindung betrifft einen durch, unmittelbaren Stromdurchfluß beheizten Bimetallstreifen, wie er beispielsweise für thermische Anzeige-, Auslöse-, Verklinkungsvorrichtungen σ. dgl. in der Meß- und Schaltertechnik venvendet wird. Stehen für die Heizung eines solchen Streifens nur verhältnismäßig kleine Ströme zur Verfügung, so muß der Streifen meist mit einer besonderen Heizwicklung versehen werden, weil bei unmittelbarem Hindurchleiten des Stromes durch den Metallkörper des Bimetallstreifens die Stromwärme nicht ausreicht, um 'eine genügend starke Formänderung des Streifens liervorzurufen. Man könnte zwar durch entsprechende Querschnittsverringerung den Widerstand des Bimetallstreifens und damit die in ihm erzeugte Stromwärme erhöhen, die Feder wird aber dann mechanisch zu wenig widerstandsfähig. The invention relates to a bimetallic strip heated by direct current flow, such as, for example, for thermal display, release, latching devices σ. Like. Is used in measurement and switch technology. Stand for the heater Such a strip only has relatively small currents available, so the strip usually has to be equipped with a special heating coil are provided because when the current is passed directly through the metal body of the bimetallic strip, the current heat not enough to 'a sufficient strong change in shape of the strip. You could through appropriate Cross-sectional reduction increases the resistance of the bimetal strip and thus the electrical heat generated in it, the spring but then becomes mechanically insufficiently resistant.

Erfindungsgemäß wird die mechanische Widerstandsfähigkeit von Bimetallstreifen, die durch unmittelbaren Stromdurchfluß beheizt werden, durch Abwinkelung eines oder beider Längsränder, durch Eindrücken von Rillen oder durch ähnliche Profiländerungen ohne Querschnittsvergrößerung derart erhöht, daß ein solcher Bimetallstreifen eine genügende Steifigkeit zum Übertragen größerer Schalt- oder Stützkräfte erhält und trotzdem durch im Verhältnis zu seinem mechanischen Arbeitsvermögen kleine Ströme unmittelbar beheizt werden kann.According to the invention, the mechanical resistance of bimetal strips that be heated by direct current flow, by angling one or both of them Longitudinal edges, by indenting grooves or by similar profile changes without Cross-sectional enlargement so increased that such a bimetal strip a sufficient Stiffness to transfer larger switching or support forces is maintained and still through directly heated small currents in relation to its mechanical working capacity can be.

Eine besondere Heizwicklung kann daher erspart und der Schalter somit in seiner Herstellung vereinfacht und verbilligt werden. A special heating coil can therefore be saved and the switch can be saved Manufacturing can be simplified and cheaper.

Die Erfindung soll an Hand der beiliegenden Zeichnung näher erläutert werden.The invention will be explained in more detail with reference to the accompanying drawing.

Fig. r zeigt im Schema einen Schalter mit einer durch den Bimetallstreifen 2 verriegelten Schaltklinke 3. Sobald der Strom über einen bestimmten Wert ansteigt, biegt sich der Streifen im Sinne des eingezeichneten Pfeiles- durch, gibt die unter der Einwirkung der Spannwerksfeder 4 stehende Klinke 3 frei und.tuft dadurch in bekannter Weise die Auslösung des Schalters hervor.Fig. R shows in the scheme a switch with a locked by the bimetallic strip 2 Pawl 3. As soon as the current rises above a certain value, it bends the stripe through in the sense of the arrow indicates that under the action the tensioning mechanism spring 4 standing pawl 3 free und.tuft thereby triggering in a known manner of the switch.

Fig. 2 zeigt einen U-förmigen Bimetallstreifen, dem an den Enden 21, 22 der Heizstrom zugeführt wird; in seine Schenkel sind Rillen 23, 24 eingedrückt.Fig. 2 shows a U-shaped bimetal strip, which at the ends 21, 22 of the heating current is fed; Grooves 23, 24 are pressed into its legs.

Fig. 3 zeigt einen Querschnitt durch den einen Schenkel.Fig. 3 shows a cross section through one leg.

Claims (1)

Patentanspruch:Claim: Durch unmittelbaren Stromdurchfluß beheizter Bimetallstreifen, insbesondere für thermisch gesteuerte Schalter, dadurch gekennzeichnet, daß der Bimetallstreifen durch Abwinkelung eines oder beider Längsränder, durch Eindrücken von Rillen oder durch ähnliche Profiläiiderungen ohne Qucrschnittsvergrößerung derart verstärkt ist, daß er eine genügende Steifigkeit zum Übertragen größerer Schalt- oder Stützkräfte erhält und trotzdem durch im Verhältnis zu seinem mechanischen Arbeitsvermögen kleine Ströme unmittelbar beheizt werden kann.By direct current flow heated bimetal strip, in particular for thermally controlled switches, characterized in that that the bimetallic strip by bending one or both longitudinal edges, by pressing grooves or so reinforced by similar profile changes without enlarging the cross-section is that it has sufficient rigidity to transmit larger switching or Retains support forces and still through in relation to its mechanical work capacity small currents can be heated directly.
DENDAT612598D Bimetal strips heated by direct current flow, especially for thermally controlled switches Expired DE612598C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE612598T

Publications (1)

Publication Number Publication Date
DE612598C true DE612598C (en) 1935-04-29

Family

ID=6576418

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT612598D Expired DE612598C (en) Bimetal strips heated by direct current flow, especially for thermally controlled switches

Country Status (1)

Country Link
DE (1) DE612598C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968496C (en) * 1942-10-31 1958-02-27 Aeg Contactor or circuit breaker with contacts cushioned against fixed or movable contact carriers
DE1283414B (en) * 1963-10-19 1968-11-21 Alfred Eckerfeld Electric current switch with current display device, in particular for limiting the current of electrode heaters
EP0871194A1 (en) * 1997-04-09 1998-10-14 Hager Electro S.A. Machined bimetal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968496C (en) * 1942-10-31 1958-02-27 Aeg Contactor or circuit breaker with contacts cushioned against fixed or movable contact carriers
DE1283414B (en) * 1963-10-19 1968-11-21 Alfred Eckerfeld Electric current switch with current display device, in particular for limiting the current of electrode heaters
EP0871194A1 (en) * 1997-04-09 1998-10-14 Hager Electro S.A. Machined bimetal

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