Abstract: The present invention provides a molten glass conveying apparatus comprising a channel (4) along which molten glass may flow, a roof structure (6) over the channel (4) and extending between the two sides thereof and at least one nozzle (28) in the roof structure (6) through which a heating fluid may be passed, wherein in use the direction of the output of the heating fluid from the nozzle (28) is substantially along the channel (4) whereby at least one side portion of the molten glass is heated.

Abstract: A self recuperative burner which can be fired with oil or gaseous fuel or both. The oil feed pipe is surrounded by a passage through which compressed air or fuel gas is conveyed to the burner head in such a way that it reduces the tendency for the oil to overheat. Additional cooling means are provided for the oil feed pipe. The burner has a burner head which is supported by a tubular part carried by a common wall between the combustion air supply passage and the combustion products exhaust passage, there being a sliding joint between the burner head and the tubular part which provides a circumferential series of arcuate gaps around the periphery of the burner head for the flow of combustion air between the burner head and the tubular part. The burner has an exhaust flue which is surrounded by a tubular part in which the combustion air inlet port is formed, the flue being cooled by incoming combustion air.

Abstract: A method of and means for changing the direction of flow of the products of combustion leaving a fuel fired burner. Located adjacent to the discharge end of a combustion chamber of the burner is a quarl or burner block having a convex surface defining a deflection path which follows closely said surface and along which the projected combustion products are caused to flow under the influence of surrounding gaseous pressures. The passage through the quarl in advance of the convex surface is restricted, for example by an encroachment of the convex surface into the passage and a deflector lip projecting into the passage opposite to said encroachment. The quarl may be inserted in the wall of a furnace at right angles thereto and without projecting therebeyond to direct the combustion products along the wall surface.