Abstract: A radiation receiver which includes a hollow body having an opening for the inlet of radiation, and a ceramic absorber arranged within the hollow body adapted to absorb the radiation energy received through the opening and to deliver it to a heat carrier medium in the form of thermal radiation.

Abstract: Swirl tube or chamber apparatus is provided for separating isotope or gas mixtures of a process gas having heavy and light gas fractions intermixed. This apparatus includes a swirl chamber having feed ports issuing tangentially thereinto for feeding processed gas to be effectively centrifuged in the swirl chamber. Extraction elements are provided for extracting the heavy gas fraction from the outer walls of the swirl chamber and for extracting the light gas fraction from the interior of the cylinder near the longitudinal axis thereof. The swirl chamber is a rotatably support chamber which is symmetrically configured with respect to its center. In particularly preferred embodiments, the process gas fed into the swirl chamber also serves to form a bearing cushion for the container, as well as for imparting driving forces to the container to rotate the same.

Abstract: An accumulator arrangement for the storage and release of braking energy, and for the braking and driving of a rotating shaft by means of a flywheel. The rotating shaft which is to be braked or driven, is connected to a drive or gear unit having 2.degree. of freedom; one output of which is coupled to the flywheel via an installation operable either as a generator or a motor, and whose other output is connected with a second installation operable as a generator or a motor, and the two installations are connected with each other for energy transmission, preferably through a buffer or shock absorbing device.