Abstract: A sealed connection for a sleeve and jacket for protecting a molybdenum electrode mounted through the wall of an electric glass furnace. Around the electrode in the wall is a stainless steel sleeve coated on the inside with a fused alumina and having an outwardly extending flange at its outer end which engages the outer wall or shoulder in the aperture in the wall through which the electrode extends. The flange has an axially outwardly extending rib of V-shaped radial cross-section which seats and centers in an annular V-shaped groove around the inner end of a water jacket that surrounds the electrode outside the furnace. Refractory sealing gaskets are placed between the flange and the wall of the furnace and in the cooperating grooves and ribs of the sleeve and water jacket. The sealed cylindrical annular space around the electrode between it and the sleeve and the jacket is filled with nitrogen to prevent oxidation of the molybdenum electrode.

Abstract: A container between the output of a melting furnace wherein the molten mass is also refined, such as for glass, and the ducts to a plurality of forming machines comprising a larger first zone and a plurality of smaller second zones corresponding to each forming machine, in which container the molten mass is controlled in temperature above and below its liquid level as it flows through the first and second zone toward a forming machine so that the cross-sectional area of the molten mass at the outlet duct from each second zone has substantially a uniform temperature.

Abstract: An electric furnace having four equal length and height sidewalls at right angles to each other, and a bottom with an outlet trough under the center of one of said sidewalls. All of the rod electrodes for this furnace project horizontally inwardly from corner areas of the sidewalls usually perpendicularly to each sidewall equally spaced from the corner, but they may be angled less than about 20.degree. toward the corner. For shallow furnaces having relatively low sidewalls only one or two electrodes at each corner area are required, all of which electrodes are located in the same horizontal plane. However, for deeper furnaces, two or more parallel horizontal planes of electrodes are provided which planes are equally vertically spaced less than the distance of the top electrode to the top of the furnace and the bottom electrode to the bottom of the furnace. Each of the electrodes are mounted in insulation blocks which extend inwardly from the inner surface of the furnace and surround each electrode.