EP 0178796 B1 19891102 - MANUFACTURE OF VACUUM INTERRUPTER CONTACTS
Title (en)
MANUFACTURE OF VACUUM INTERRUPTER CONTACTS
Publication
Application
Priority
GB 8426009 A 19841015
Abstract (en)
[origin: EP0178796A2] 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
IPC 8 full level
H01H 1/02 (2006.01); H01H 33/66 (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