| (19) |
 |
|
(11) |
EP 1 109 188 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
16.04.2003 Bulletin 2003/16 |
| (43) |
Date of publication A2: |
|
20.06.2001 Bulletin 2001/25 |
| (22) |
Date of filing: 12.12.2000 |
|
| (51) |
International Patent Classification (IPC)7: H01H 50/16 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
14.12.1999 ES 9902729
|
| (71) |
Applicant: GE Power Controls Iberica, S.L. |
|
08225 Terrassa, Barcelona (ES) |
|
| (72) |
Inventors: |
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- Mediavilla Telleria, Jose Fernando
28034 Madrid (ES)
- Gomez Martin, Javier
45005 Toldeda (ES)
|
| (74) |
Representative: Pedder, James Cuthbert |
|
GE London Patent Operation, Essex House, 12/13 Essex Street
London WC2R 3AA
London WC2R 3AA (GB) |
|
| |
|
| (54) |
A treatment for lengthening the life of electromagnetic relays |
(57) A treatment for lengthening the life of electromagnetic relays is characterized by
the determining magnetic elements of the contacts in the relay being surface-hardened
by means of the incorporation of a fine TiN (titanium nitride) base covering coat.