Abstract: A seal adapted to be mounted on an edge of an element such as, for example, a sheet metal panel or non-sliding glass of an automobile, and of the type comprising a sealing portion fixed to a channel or U-portion which can be engaged on the edge of the element, the seal comprising, at least one lip articulated to the channel and projecting into the interior of the channel, the lip having a portion for bearing elastically on a wall of the element, and of a profile in the form of an arc of a logarithmic spiral centered on a point of articulation of the lip on the channel, the sprial having a profile wherein the angle made by a radius vector of the spiral with the normal at the point of contact of the lip on the element is less than the angle of friction between the respective materials of the lip and the element.

Abstract: A wall element for furnaces useful in all types of metallurgical furnaces but particularly in electric arc steel refining furnaces is comprised of a metallic block defining a cooling circuit in the interior thereof and a lining of refractory bricks anchored firmly to the cooled metallic block. The metallic block carries anchoring lugs projecting from the internal face of the block, each lug consisting of a foot portion and a retaining portion, which is constituted by an enlarged end of the foot portion opposite the internal face. Each refractory brick has a face adjacent the internal face of the metallic block and defining a recessed portion of a cross section matching that of a corresponding one of the anchoring lugs.