Hitachi, Ltd.

Akio Ohyama

Tatsuhiro Tani

Rokuro Kikuchi

Masaaki Ishiguri

A method of production of an electric contact including a contact base member of one metal and a contact member of another metal of hardness lower than that of the contact base member joined to the contact member at one end portion thereof, with the method comprising the steps of forming a blind hole at the one end portion of the contact base member and applying pressure simultaneously to the contact base member and the contact member after the contact member is inserted and filled in the blind hole, to thereby cause the metals of the two members undergo plastic deformation to join them together in intimate contact with each other.

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Katsuta, Japan

Akio Ohyama