Abstract: A device is described, which, according to one exemplary embodiment, includes a carrier which has a through opening along a longitudinal axis, and at least one soft magnetic strip wound around the carrier to form a toroidal strip core. The strip is wound directly onto the carrier so that there is no play between the toroidal strip core and the carrier. The carrier can thus serve as part of the housing of the toroidal strip core.

Abstract: The invention relates to a magnetic assembly comprising a magnetic core made of a soft magnetic material and a housing which surrounds the magnetic core on all sides and has two housing parts connected to one another. The connected housing parts have an overlapping region all around the magnetic core, within which one of the housing parts has a ridge all around the edge and the other housing part has a corresponding groove all around the edge, in which the rib interlockingly engages.

Abstract: An electronic flash unit for photographic purposes, in which there is a first thyristor in series with the flash tube, and a second thyristor which, in series with a quenching capacitor, is in parallel with the first thyristor. The first thyristor is quenched at the appropriate time, by quenching current from the quenching capacitor, and after the first thyristor has been rendered non-conductive, the second capacitor is also rendered non-conductive by forced commutation. The arrangement shortens the recovery time of the apparatus, as compared with prior art apparatus of this same general type, to such an extent that the flash apparatus may be used with a motion picture camera as well as a still camera, to produce one or more flashes during each shutter-open cycle of the motion picture camera.