Frishauf, Holtz, Goodman, Langer & Chick
Direct current arc furnace
 A DC arc furnace according to the invention has a bottom electrode, which comprises a plurality of contact pins each having an end to be brought into contact with an object and to supply arc-forming current thereto, a current base electrically connected to the other end of each of the contact pins for distributing current from a power supply to the contact pins, and a cooling device for cooling the current base with the use of cooling water. 
NKK Corporation Tokyo Steel M.F.G. Co., Ltd.
F Y F H C
F27D Y02P F27B H05B C21C
additional additional inventional inventional inventional
Toshimichi Yoshimi Hiroyuki Hidefumi
Maki Kawazu Yamashita Nakashima