Abstract: Without exception, the iron sheets of the stator teeth of electric motors are up to now produced by stamping. The invention relates to electric motors in which the stack of iron sheets of the stator is largely composed of rectangular metal sheet strips cut from a strip.

Abstract: Shaftless centrifugal pumps have particularly advantageous running characteristics when installed vertically. But in order to make it possible for the delivery stream also to run vertically, the pipe connectors form bends, the ends of which can be integrated into a vertical pipeline.

Abstract: Latent heat storage means having, fusible at a pre-determined temperature, a mass which is traversed by heat exchanger surfaces and which fills a container jointly with the heat exchanger, characterized in that the container is constructed as a cylindrical vessel while the heat exchangers are formed from elongated strips wound spirally about a vertical axis.

Abstract: A warm water storage system for supplying warm water to a network with water under pressure characterized in that the storage is pressureless and takes place in a ventilated container, and that between the take-off region of the container and the warm water supply network is incorporated a booster pump.

Abstract: An absorber element for the absorption of solar energy, which serves also as a heat exchanger for ambient air and forms the skin of a roof, wherein the outside facing surface of the element is substantially identical in appearance with that of a conventional roof covered with tiles or slates, and wherein the absorber element is along two margins provided with overlap regions for smooth joining of the element with conventional tiles or slates.

Abstract: Jet stream device consisting of a submersible electrical motor, a pump, a housing, an outlet nozzle and fixing means, in which the motor drives the impeller of an axial pump, located in a necked-down portion of the casing and wherein the smallest cross-section of said necked-down portion coincides approximately with the cross-section of the outlet nozzle, which is positioned behind the necked-down portion and wherein furthermore motor, pump impeller, necked-down portion and outlet nozzle are surrounded by a housing whose width coincides approximately with the width of the outlet nozzle.

Abstract: A transparent double pane construction for use as a building panel where at least one pane is made of a transparent organic material spaced from the other panel. The panel made of the organic material has a surface made up of a hydrophilic material.

Abstract: A heat pump having a rotatable casing and impeller. The pump includes a liquid heat exchanger and an air heat exchanger both connected to the casing so as to form a rotatable unit therewith. A magnetically active rotor is magnetically coupled to the inpeller to provide a drive force for the pump. Rotation of the impeller causes the casing and heat exchanger to also rotate under the influence of reaction forces.