Contact piece made of tungsten provided with a...

Details Contact piece made of tungsten provided with a... Contact piece made of tungsten provided with a...

2004-04-19

2008-03-04

Friedhofer, Michael A (Department: 2832)

Electricity: circuit makers and breakers

Electric switch details

Contact

C200S268000, C200S269000, C029S622000

Reexamination Certificate

active

07339127

ABSTRACT:
A contact piece is formed by a tungsten overlay soldered onto a support, wherein at least portions of the solder layer and optionally of the support are covered by a layer of a less noble metal than tungsten. The corrosion resistance of the tungsten overlay is considerably improved.

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Albert Keil, “Eine spezifische Korrosionserscheinung an Wokfram-Kontakten,” Werkstoffe und Korrosion 7, pp. 263-265, (1952).
C.L. Meyer, “Korrosionserscheinungen an Unterbrecherkontakten,” Elektropost 7, pp. 93-95, (1954).

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