Fuji Electric Co., Ltd.

Tokuriki Honten Co., Ltd.

Mitsuo Sunaga

Akihiro Takahashi

Takashi Nara

Hiroshi Hikita

Shigemasa Saito

Hisaji Shinohara

Kiyoshi Sekiguchi

Seiji Imamura

Mamoru Akimoto

Sadao Sato

Kazuo Kondo

An electric contact with a base metal used as a switch wherein the non-welded peripheral portion of the contact is prevented from bow-like bending and from peeling off. The electric contact with a base metal having a contact promoting shape is formed by die forging of a contact material joined to the base metal by resistance welding. The composite contact material is prepared by coating the core material of Ag-oxide contact material with non-oxide contact material. The side of the material in contact with the base metal is of non-oxide contact material. The contact material may be pressed to fill a groove preformed in the base metal, welded to protrusions preformed in the base metal, welded to the bottom of a cut preformed in the base metal, or welded to bottoms of recesses preformed in the base metal.

Electric contact with base metal

The method of bonding silver-based contact is disclosed. A silver-based contact is brought into contact with a support, at least the surface of which is made of a cupreous material, with a pressure of less than 1 kgf/cm.sup.2 exerted therebetween. The contact and support are heated in a non-oxidizing atmosphere at a temperature of more than 700.degree. C.

Method for bonding silver-based contact

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Kanagawa, Japan

Mitsuo Sunaga