Invention Grant
- Patent Title: Electric contact and breaker using the same
- Patent Title (中): 电接点和断路器使用相同
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Application No.: US10501960Application Date: 2003-01-15
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Publication No.: US06974923B2Publication Date: 2005-12-13
- Inventor: Noboru Uenishi , Norihito Goma
- Applicant: Noboru Uenishi , Norihito Goma
- Applicant Address: JP Osaka
- Assignee: Sumitomo Electric Industries, Ltd.
- Current Assignee: Sumitomo Electric Industries, Ltd.
- Current Assignee Address: JP Osaka
- Agency: McDermott Will & Emery LLP
- Priority: JP2002-011121 20020121
- International Application: PCT/JP03/00294 WO 20030115
- International Announcement: WO03/063191 WO 20030731
- Main IPC: C22C5/06
- IPC: C22C5/06 ; H01H1/023 ; H01H1/0237 ; H01H1/04 ; H01H73/04 ; H01H1/02

Abstract:
A high quality electrical contact that is made of a Cd free Ag alloy and can be applied to a breaker is provided.The electrical contact is made of an Ag alloy containing Sn and In each 1 to 9% by weight, and has a first layer as the surface layer and a second layer as an internal portion. The hardness of the first layer and the hardness of the second layer are equal to or more than 190 and equal to or less than 130, respectively, based on micro Vickers standard defined by JIS. The thickness of the first layer is within the range from 10 to 360 μm. In particular, the electrical contact has a high quality temperature characteristic as well as a high quality welding resistance characteristic.
Public/Granted literature
- US20050115812A1 Electric contact and breaker using the same Public/Granted day:2005-06-02
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