Abstract: A device to produce alternating electric current of high frequency for power consumers such as fluorescent lamps, which includes the means of supplying a DC voltage nearly twice the size of the peak voltage of the alternating voltage input--with negligible loss of power--to the remainder of the circuit and thus reducing the intrinsic power consumption of the device as well as making it possible to supply the said power consumer such as the fluorescent lamp with a higher start voltage as well as a higher voltage in operation.

Abstract: A device to produce alternating electric current of high frequency for power consumers such as fluorescent tubes comprises a transformer with a winding connected in series with an output terminal and active electronic components controlling the output current, said active components being controlled by electric voltages produced by inductive feed back. Magnetic saturation is utilized to modify the induction relationship in such way that the active components cyclically change the direction of the output current. According to the invention the feedback takes place in two magnetic cores, each core being equipped with at least one further electric magnetization winding designated a command winding, as electric current is fed through the command windings whereby magnetic saturation of the magnetic cores is controlled.

Abstract: A cushion or pillow for use by making upholstered furniture comprises a generally block- or plate-shaped foam core (2) and a fibrous stuffing material (6) which surrounds the core. The stuffing material (6) includes at least one layer or web of a cable fiber material, the layer being dimensioned and retained to completely enclose the core. The long and generally uniformly oriented cable fibers or filaments are retained and the stuffing material does not include free or loose fibers. Accordingly, it is not necessary to make specific demands with respect to the tightness of cover fabrics, since there are no loose fibers which are able to penetrate the cover. The fact that the long fibers or filaments are continuous has also the effect that the fibers or filaments are not able to lump or become firmly bonded together and, thereby, the cushion can be cleaned by usual washing and drying.