DE836128C - Spark plug with chrome coated electrode - Google Patents
Spark plug with chrome coated electrodeInfo
- Publication number
- DE836128C DE836128C DER3202A DER0003202A DE836128C DE 836128 C DE836128 C DE 836128C DE R3202 A DER3202 A DE R3202A DE R0003202 A DER0003202 A DE R0003202A DE 836128 C DE836128 C DE 836128C
- Authority
- DE
- Germany
- Prior art keywords
- chrome
- spark plug
- coated electrode
- chrome coated
- electrode
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/39—Selection of materials for electrodes
Description
Zündkerze mit Chrommantelelektrode Um bei Zündkerzen, z. B. solchen für Motorfahrzeuge, zu vermeiden, daß die Elektroden bei den hohen Betriebstemperaturen und solchen Brennstoffen, welche einen schädlichen chemischen Angriff hervorbringen können, in kurzer Zeit unbrauchbar gemacht werden, wurde im Patent 802 736 schon vorgeschlagen, statt aus chromlialtigen Legierungen bestehender Elektroden solche zu verwenden, die aus einem besser wärmeleitenden Metall als Chrom bestehen und die mit einem Mantel aus Chrom überzogen sind, der beispiels-%@eise auf galvanischem Weg auf den Elektroden angebracht ist. Damit wurde zwar der schädliche Angriff auf die Elektrodenfläche vermieden, aber es hat sich herausgestellt, daß bei dem häufigen schroffen Temperaturwechsel der Chrommantel eich von der Elektrode ablöst, eine Erscheinung, die sehr nachteilig ist.Spark plug with chrome coated electrode. B. such for motor vehicles, to avoid leaving the electrodes at the high operating temperatures and those fuels which cause harmful chemical attack can be made unusable in a short time, was already mentioned in patent 802 736 proposed, instead of electrodes consisting of chromium-like alloys to use, which consist of a better heat conducting metal than chrome and which are coated with a coat of chrome, the example -% @ iron on galvanic Way is attached to the electrodes. This ended the harmful attack on the electrode area avoided, but it has been found that with the frequent abrupt change in temperature, the chrome coating is detached from the electrode, a Appearance which is very disadvantageous.
Gemäß der neuen zusätzlichen Erfindung ist es gelungen, das Ablösen der Chromschicht .mit voller Sicherheit zu vermeiden, und zwar dadurch, daß nicht ein besonderer Chrommantel aufgebracht wird, sondern eine Chromlegierung angewandt wird, die bei entsprechender Erhitzung, zweckmäßig etwa iooo°, an der Berührungsstelle mit dem Elektrodenkörper in diesen hineindiffundiert, und zwar derart, daß der Chromgehalt nahe der ()berfläclte wesentlich höher bleibt als weiter nach innen zu.According to the new additional invention, the detachment has succeeded the chrome layer. to avoid with complete certainty, namely that not a special chrome jacket is applied, but a chrome alloy is used becomes useful when heated appropriately about iooo °, diffuses into the electrode body at the point of contact with the latter, and in such a way that the chromium content near the () surface remains significantly higher than further inwards.
Auf diese Weise wird eine Verankerung der stark chromhaltigen Außenschicht mit dem zweckmäßig aus besser wärmeleitendem Metall, z. B. Nickel, bestehenden Elektrodenkern erzielt, der ein Loslösen der stark chromhaltigen äußeren Schicht unmöglich macht.In this way, the outer layer, which contains a lot of chromium, is anchored with the appropriate of better heat conductive metal, z. B. nickel, existing electrode core achieved, which makes detachment of the heavily chromium-containing outer layer impossible.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER3202A DE836128C (en) | 1950-08-01 | 1950-08-01 | Spark plug with chrome coated electrode |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER3202A DE836128C (en) | 1950-08-01 | 1950-08-01 | Spark plug with chrome coated electrode |
Publications (1)
Publication Number | Publication Date |
---|---|
DE836128C true DE836128C (en) | 1952-04-10 |
Family
ID=7396268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER3202A Expired DE836128C (en) | 1950-08-01 | 1950-08-01 | Spark plug with chrome coated electrode |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE836128C (en) |
-
1950
- 1950-08-01 DE DER3202A patent/DE836128C/en not_active Expired
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