DE345138C - - Google Patents

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Publication number
DE345138C
DE345138C DENDAT345138D DE345138DA DE345138C DE 345138 C DE345138 C DE 345138C DE NDAT345138 D DENDAT345138 D DE NDAT345138D DE 345138D A DE345138D A DE 345138DA DE 345138 C DE345138 C DE 345138C
Authority
DE
Germany
Prior art keywords
shaped
heating element
cutouts
heating
places
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.)
Active
Application number
DENDAT345138D
Other languages
German (de)
Publication of DE345138C publication Critical patent/DE345138C/de
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating

Landscapes

  • Surface Heating Bodies (AREA)

Description

Die vorliegende Erfindung betrifft eine besondere Ausführungsform einer elektrischen Heizvorrichtung nach Patent 329425 und besteht darin, daß man für die U-förmigen Heizelemente Metallbänder verwendet, die stellenweise durchbrochen sind. Es läßt sich dadurch ein Mehrfaches vom Widerstand des aus glattem Metallband hergestellten Heizelementes und gleichzeitig auch eine bessere Abkühlung desselben erzielen.The present invention relates to a particular embodiment of an electrical Heating device according to patent 329425 and consists in that one for the U-shaped Heating elements use metal strips that are perforated in places. It can be thereby a multiple of the resistance of the heating element made of smooth metal strip and at the same time achieve better cooling of the same.

Die Zeichnung zeigt eine beispielsweise Ausführung eines Heizelementes nach der vorliegenden Erfindung, und zwar in Abb. 1 den dazu verwendeten Metallstreifen a, aus dem Löcher b und an den Längsrändern in regelmäßigen Abständen Ausschnitte c gestanzt sind. Größe und Verteilung dieser Ausnehmungen werden so gewählt, daß das U-förmig gefaltete Band α in Abb. 2 die an den beiden Längsseiten des Heizelementes gleichmäßig verteilten Ausschnitte b und c erhält. Die Größe der sich dadurch ergebenden wellenförmigen Windungen kann durch Ändern des Abstandes der Ausnehmungen δ und c von einander und damit auch der Widerstand jedes einzelnen Heizelementes beliebig geändert werden, wie dies beispielsweise in den beiden Zeichnungshälften geschehen ist.The drawing shows an exemplary embodiment of a heating element according to the present invention, namely in Fig. 1 the metal strip a used for this purpose, from which holes b and cutouts c are punched at regular intervals on the longitudinal edges. The size and distribution of these recesses are chosen so that the U-shaped folded band α in Fig. 2 receives the cutouts b and c evenly distributed on the two long sides of the heating element. The size of the resulting wave-shaped windings can be changed as desired by changing the distance between the recesses δ and c and thus also the resistance of each individual heating element, as has happened, for example, in the two halves of the drawing.

Claims (2)

Patent- Ansprüche :Patent claims: 1. Elektrische Heizvorrichtung nach Patent 329425, dadurch gekennzeichnet, daß die U-förmigen Heizelemente aus stellenweise durchbrochenen Metallbändern hergestellt sind. ·1. Electric heating device according to patent 329425, characterized in that that the U-shaped heating elements are made of metal strips with openwork in places are made. · 2. Heizelement für elektrische Heizvorrichtungen nach Anspruch 1, gekennzeichnet durch Ausschnitte an seinen Längsrändern und dazwischenliegende Löcher von solcher Form und Anordnung, daß das U-förmig gefaltete Band abwechselnd von der offenen und der geschlossenen Längsseite ausgehende Einkerbungen erhält und wellenförmige Windungen bildet.2. Heating element for electrical heating devices according to claim 1, characterized by cutouts on its longitudinal edges and holes therebetween of such a shape and arrangement that the U-shaped folded band receives notches starting alternately from the open and the closed longitudinal side and forms undulating turns. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DENDAT345138D Active DE345138C (en)

Publications (1)

Publication Number Publication Date
DE345138C true DE345138C (en)

Family

ID=573600

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT345138D Active DE345138C (en)

Country Status (1)

Country Link
DE (1) DE345138C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570692A (en) * 1948-07-28 1951-10-09 Exmet Electrical Corp Expanded metal electrical resistance
US3383497A (en) * 1964-12-02 1968-05-14 Monsanto Co Electric resistance heaters
FR2309107A1 (en) * 1975-04-23 1976-11-19 Aichelin Fa J ELECTRIC HEATING ELEMENT BY RESISTANCE, IN PARTICULAR FOR INDUSTRIAL OVENS

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570692A (en) * 1948-07-28 1951-10-09 Exmet Electrical Corp Expanded metal electrical resistance
US3383497A (en) * 1964-12-02 1968-05-14 Monsanto Co Electric resistance heaters
FR2309107A1 (en) * 1975-04-23 1976-11-19 Aichelin Fa J ELECTRIC HEATING ELEMENT BY RESISTANCE, IN PARTICULAR FOR INDUSTRIAL OVENS

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