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DE568512C - Resistance wire provided with a metallic protective layer for electrical heating elements - Google Patents

Resistance wire provided with a metallic protective layer for electrical heating elements

Info

Publication number
DE568512C
DE568512C DES86506D DES0086506D DE568512C DE 568512 C DE568512 C DE 568512C DE S86506 D DES86506 D DE S86506D DE S0086506 D DES0086506 D DE S0086506D DE 568512 C DE568512 C DE 568512C
Authority
DE
Germany
Prior art keywords
protective layer
resistance wire
heating elements
electrical heating
wire provided
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
DES86506D
Other languages
German (de)
Inventor
Dr Hans Gerdien
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 Corp
Original Assignee
Siemens Schuckertwerke AG
Siemens Corp
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 Siemens Schuckertwerke AG, Siemens Corp filed Critical Siemens Schuckertwerke AG
Priority to DES86506D priority Critical patent/DE568512C/en
Application granted granted Critical
Publication of DE568512C publication Critical patent/DE568512C/en
Expired 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

  • Resistance Heating (AREA)

Description

Mit einer metallischen Schutzschicht versehener Widerstandsdraht für elektrische Heizkörper als 'Material für Widerstandsdrähte von elektrischen Heizkörpern benutzt man meist ehernlisch widerstandsfähige 'Materialien. Auch ist vorgeschlagen worden, besondere Schutzschichten anzuwenden. Bei metallischen Schutzschichten hat sich jedoch vielfach ergeben, daß nach einer bestimmten Zeit trotz der Schutzschicht eine 0vdation der Widerstandsdrähte eintritt. Die vorliegende Erfindung fußt auf der Erkenntnis, daß hieran die Bildung von Mischkristallen zwischen dem -Material der Schutzschicht und seiner Unterlage schuld ist. Die Schutzschicht diffundiert allmählich in den Widerstandsdraht hinein, so daß nach einer bestimmten Zeit der Widerstandsdraht den Einwirkungen des Luftsauerstoffs ausgesetzt ist. Gemäß der Erfindung wird daher die Schutzschicht aus einem Material hergestellt, das mit seiner Unterlage keine 'Mischkristalle bildet. Da man in der Wahl der Materialien vielfach beschränkt ist, so verwendet man zweckmäßig Zwischenüberzüge, die mit der Schutzschicht keine Mischkristalle bilden. Will man beispielsweise die Widerstandsfähigkeit von Widerstandsdrähten, die aus einer Legiertuivon Chrom und Nickel bestehen, noch «-eiter erhöhen, so versieht man sie gemäß der Erfindung erst mit einem dünnen Kupferüberzug und dann mit einem Chromüberzug. Der Kupferüberzug verhindert, daß das Chrom allmählich in den Widerstandsdraht hinein wandert. Auch zum Schutze von Eisendrähten empfiehlt es sich, Z-%viscliv nscliicliten aus Kupfer anzuwenden.Resistance wire provided with a metallic protective layer for electric radiators as a material for resistance wires in electric radiators one uses mostly hard-wearing materials. It is also suggested have been to apply special protective layers. With metallic protective layers however, it often turns out that after a certain time despite the protective layer an evolution of the resistance wires occurs. The present invention is based on the knowledge that this leads to the formation of mixed crystals between the material the protective layer and its base is to blame. The protective layer diffuses gradually into the resistance wire, so that after a certain time the Resistance wire is exposed to the effects of atmospheric oxygen. According to the Invention, therefore, the protective layer is made of a material with its Base does not form mixed crystals. Since you have a lot of choices in the choice of materials is limited, it is useful to use intermediate coats with the protective layer do not form mixed crystals. For example, if you want the resilience of Resistance wires, which consist of an alloy of chromium and nickel, still «-conductors increase, they are provided according to the invention with a thin copper coating and then with a chrome plating. The copper plating prevents the chrome from gradually increasing migrates into the resistance wire. Also recommended for protecting iron wires it is advisable to use Z% viscliv nscliiclites made of copper.

Claims (1)

PATE \TA\SPRÜCHE: r. Mit einer metallischen #,cliutzsrliiclit versehener Widerstandsdraht für elektrische Heizkörper. dadurch gekennzeichnet, dah die Schutzschicht aus einem Material besteht, das mit seiner Unterlage keine#'IischkristaIle bildet. =. Widerstandsdraht nach Anspruch i, dadurch gekennzeichnet, daß zwischen dem ' Widerstaadsdralit und der Schutzschicht eine besondere Zwischenschicht an-eordnet ist. die mit dein -Material der Schutzschicht keine 1Iixhkristalle bildet. Widerstandsdraht nach Anspruch i oder =. dadurch gekennzeichnet, daß bei der @c-r@tellun@r von Chromiil>ürzügeu als `chutz:riiiclit eine Zwischenschicht aus Kupfer vernend et wird.PATE \ TA \ PROVERBS: r. With a metallic #, cliutzsrliiclit provided Resistance wire for electric radiators. characterized by the protective layer consists of a material that does not form any Iishcristals with its base. =. Resistance wire according to claim i, characterized in that between the ' Widerstaadsdralit and the protective layer a special intermediate layer is. which does not form any mixed crystals with the material of the protective layer. Resistance wire according to claim i or =. characterized in that at the @ c-r @ tellun @ r of Chromiil> ürzugtu as protection: riiiclit an intermediate layer of copper is used.
DES86506D 1928-07-07 1928-07-07 Resistance wire provided with a metallic protective layer for electrical heating elements Expired DE568512C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES86506D DE568512C (en) 1928-07-07 1928-07-07 Resistance wire provided with a metallic protective layer for electrical heating elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES86506D DE568512C (en) 1928-07-07 1928-07-07 Resistance wire provided with a metallic protective layer for electrical heating elements

Publications (1)

Publication Number Publication Date
DE568512C true DE568512C (en) 1933-01-20

Family

ID=7513078

Family Applications (1)

Application Number Title Priority Date Filing Date
DES86506D Expired DE568512C (en) 1928-07-07 1928-07-07 Resistance wire provided with a metallic protective layer for electrical heating elements

Country Status (1)

Country Link
DE (1) DE568512C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4304251A (en) * 1977-11-19 1981-12-08 Schaedel Hermann Double seat valve with leak control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4304251A (en) * 1977-11-19 1981-12-08 Schaedel Hermann Double seat valve with leak control

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