Abstract: In this panel-type radiator a pair of panels are disposed in adjacent, side-by-side relationship, and each is made of two thin dished sheets of steel. Adjacent sheets of the adjacent panels are each provided with a thin-walled embossment of generally truncated conical form having a central opening extending through its outer end. Each embossment also comprises a radially-extending flange surrounding the opening and an annular portion of rounded cross-section joining the flange and the generally conical portion of the embossment. The flanges are disposed in juxtaposition with the openings generally aligned, thus providing externally of the flanges a groove of generally V-shaped cross-section between the annular portions of the embossments. A deposit of silicon bronze forms a brazed joint between the embossments, and this deposit comprises an annular filet of silicon bronze disposed in the V-shaped groove and a film of silicon bronze between the juxtaposed flanges.

Abstract: This panel-type radiator for extracting heat from liquid flowing therethrough comprises a panel through which the liquid flows in a downward direction. The panel is made from two dished metal sheets having aligned vertically-extending embossments welded together along a vertically-extending zone and providing spaced vertically-extending flow channels on opposite sides of the vertically extending zone. The portions of the sheets defining the walls of said channels are provided with vertically-spaced embossments arranged on each sheet in a generally herringbone pattern, with the individual embossments extending transversely of the vertically-extending zone via a path that slopes upwardly as the vertically-extending zone is approached.