VACUUM CIRCUIT INTERRUPTER CONTACTS AND SHIELDS

摘要

A powdered metallurgical procedure for forming copper-chromium contacts and copper-ferrous material shields for use in vacuum circuit interrupters. The copper chromium contacts include a specific copper-iron non-abutting section, and an abutting layer preferably of copper-chromium with a layer thickness that constitutes about 50% of the total thickness of the contact which constitutes the abutting section of the contact struc- ture. The shield for the contacts, are preferably formed of copper-ferrous material and "X" in which 1%-50% is ferrous material, and "X" = chromium 0% to 30% and ferrous material plus "X" is less than 60% of the total shield.