Abstract: A device for contactless, vertically downwards continuous casting of metals in an electromagnetic alternating field, has an inductor and an electrically conductive, non-ferromagnetic screen that tapers downwards and features at a vertical distance 9 from this screen an electrically conductive, non-ferromagnetic counter screen that tapers upwards, the distance 9 between the said screen and counter screen being at least 2 mm, at most equal of the height of the inductor and in a continuous process which employs this device the circulation of the melt in the molten head of the ingot is reduced at least in the steady-state phase of casting. The process is particularly suitable for continuous casting aluminum alloys having a magnesium content of at least 2%.

Abstract: A piezo-electric resonator comprises a rectangular piezo-electric bar moud interiorly of a frame formed of a multi-layered insulating material. The frame is impermeably enclosed by two cover members. The frame comprises a fastening arrangement including a suspension formed of thin conductors attached to the bar and arranged along one or more lines in the plane of one face of the bar. The thin suspension conductors are fixed to the face of the bar along nodal lines and are elbowed at least once on each side of the bar. The layered frame has a special construction.

Abstract: This invention provides a support arrangement for suspending a piezo-elecc resonator which by providing a frame with cut out portions in its interior enables a resonator provided with suspension conductors to be placed in position by simple translation or rotation without in any way distorting the suspending conductors. Accordingly, the invention is well adapted to modern mass production methods.