Abstract: Heating apparatus for producing both central heat and tap water, specifically adapted for trailers and similar mobile houses with small spaces is provided. The heat source is a burner combusting LP-gas. Heat cartridges for electric heating optionally provide a supplemental heat source. The burner operates in a cylindrical space consisting of a burner tube with a plurality radial flanges which conduct heat energy outwards to a ring-shaped space delimited by a second tube. A heat medium for central heating is contained in the ring-shaped space. A tube-shaped vessel for tap water surrounds the ring-shaped space. The tap water vessel, the second tube and the burner tube are respectively positioned inside each other.

Abstract: Device which serves to atomize a solid or liquid medium with the aid of a standing ultrasonic wave that is generated between two ultrasonic transmitters. This allows one to tune the standing ultrasonic wave automatically when the temperature of the medium or other process parameters should change.

Abstract: For a process for the manufacture of powders from molten materials by atomizing the melt to particles by means of fluid media and cooling the particles as they fall, a melting chamber (3) is provided which has a melting system (4) disposed in the melting chamber (3) and an atomizing tower (8) is provided which is associated with the atomizing system (9) and attached to the melting chamber (3). For the production of powders of finest particle size with high purity and uniformity, a plurality of nozzles (11, 12, . . .) which can be aimed in their holders at the molten stream, are used for projecting a low-boiling liquefied gas under a pressure of 50 to 700 bar against the molten stream (23) entering the atomizing tower (8).