EP 0974991 A1 20000126 - Method to produce bimetallic contacts for electromagnet blocks for starter motors and relative bimetallic contacts
Title (en)
Method to produce bimetallic contacts for electromagnet blocks for starter motors and relative bimetallic contacts
Title (de)
Verfahren zur Herstellung von Bimetallkontakten für elektromagnetische Einheiten für Anlassmotoren
Title (fr)
Procédé de production de contacts bimétalliques pour unités électromagnétiques de moteurs de démarrage
Publication
Application
Priority
IT UD980131 A 19980721
Abstract (en)
Method to produce bimetallic contacts for electromagnet units in starter motors for internal combustion engines, the contacts including a head at least partly made of material with high electric conductivity and a shank at least partly made of material with high mechanical resistance, the method providing a first step wherein a bar is obtained made of material with high mechanical resistance (22), at one end of which a cavity (24) is made, the bar (22) being of a desired shape which does not directly resemble the final shape of the bimetallic contact, a second step wherein a cylinder (23) made of material with high electric conductivity is inserted inside the cavity (24), a third step wherein the bar (22) and the cylinder (23) are subjected to a heat treatment which causes a partial melting and mutual penetration of the two elements (22, 23) to form substantially a single body and a fourth step wherein the bar (22) with the cylinder (23) incorporated is subjected to a shaping step to obtain a desired final form of the bimetallic contact (10). <IMAGE>
IPC 1-7
IPC 8 full level
H01H 11/04 (2006.01); H01H 51/06 (2006.01)
CPC (source: EP)
H01H 11/041 (2013.01); H01H 51/065 (2013.01)
Citation (search report)
- [Y] EP 0059341 A1 19820908 - HITACHI LTD [JP]
- [Y] US 2755368 A 19560717 - WIRT JOHN R, et al
- [A] FR 2030944 A5 19701113 - BOSCH
- [A] DE 4119298 A1 19921217 - BOSCH GMBH ROBERT [DE]
- [A] CH 289818 A 19530331 - FR GHIELMETTI & CIE AG [CH]
- [A] US 2086221 A 19370706 - GWYN JR CHILDRESS B
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 99113121 A 19990707; IT UD980131 A 19980721