Abstract: A movable obturator provided with two flow orifices is placed between an abutment member and two nozzles for the admission of hot water and cold water. The obturator is capable of sliding over the nozzles and provided with a plastic shoe covered by a metallic shell on which the nozzles are applied in leak-tight manner. That face of the shell on which the nozzles are applied is covered with a coating of self-lubricating polymer.

Abstract: A boiler which is primarily designed for the central heating of apartments has two separable elements constituted by the boiler furnace and a heat exchanger. The heat exchanger of single-unit construction surmounts a completely open section of the boiler furnace and carries a gas or fuel-oil burner, the flame of which is directed away from the internal surface of the heat exchanger and follows a curved path within the combustion chamber. Except for the open section which carries the exchanger, the boiler furnace is completely surrounded by a jacket for the circulation of heat-transporting fluid.

Abstract: An enamel flux supplied by a sieve carried by an articulated support is discharged under gravity onto the edge of a displaceably mounted sanitary article such as a bath or wash-basin in such a manner as to form a projecting portion which is turned-down against the lateral surface of the edge by means of a jet of gas which is directed transversely by a positionally-adjustable nozzle.