Global Patent Index - EP 0178796 A2

EP 0178796 A2 19860423 - Manufacture of vacuum interrupter contacts.

Title (en)

Manufacture of vacuum interrupter contacts.

Title (de)

Herstellung von Vakuumschalterkontakten.

Title (fr)

Fabrication de contacts d'interrupteurs à vide.

Publication

EP 0178796 A2 19860423 (EN)

Application

EP 85306634 A 19850918

Priority

GB 8426009 A 19841015

Abstract (en)

A method of manufacturing vacuum interrupter contacts by mixing powdered copper with powdered chromium and less than 0.25% powdered bismuth, cold pressing the mixture up to more than 90% of theoretical maximum density, sintering under vacuum, and then cold coining the contact up to more than 97% of theoretical maximum density. The bismuth may in some cases be replaced by lead, tellurium, thallium, antimony, tungsten or a mixture thereof.

IPC 1-7

H01H 1/02; H01H 33/66

IPC 8 full level

H01H 33/66 (2006.01); H01H 1/02 (2006.01)

CPC (source: EP)

H01H 1/0206 (2013.01)

Designated contracting state (EPC)

DE NL

DOCDB simple family (publication)

EP 0178796 A2 19860423; EP 0178796 A3 19870527; EP 0178796 B1 19891102; DE 3574074 D1 19891207; GB 2166161 A 19860430; GB 2166161 B 19880824; GB 8426009 D0 19841121; GB 8521984 D0 19851009; IN 164807 B 19890603; JP S6196621 A 19860515

DOCDB simple family (application)

EP 85306634 A 19850918; DE 3574074 T 19850918; GB 8426009 A 19841015; GB 8521984 A 19850904; IN 705DE1985 A 19850828; JP 21899885 A 19851001