Abstract: A helium II phase separator reproducible in manufacture utilizes a thermo-mechanical effect and comprises a plurality of adjacent passage gaps of identical width which are provided in the walls of a cavity dipped into a bath of liquid helium, so that the gaseous helium can be taken off.

Abstract: A device for separating gas mixtures having different molecular weights iudes a cylindrical central body having longitudinal deflection channels formed in a circumferential surface with a plurality of elongate separating elements being grouped about the periphery of the central body with each of the separating elements being formed on the side of each separating element facing the central body with a pair of tapered legs defining therebetween a concave prismatic channel. Each of the tapered legs extends into a deflection channel of the central body and terminal edges of the legs operate to generate a nozzle effect.

Abstract: Apparatus for separating a gas mixture into components of different molecr weights includes two laterally spaced tubular members with a plurality of pairs of sections extending between the tubular members. The sections of each pair combine to form a flow passageway with the adjacent edges of the sections defining nozzles. The pairs of sections are arranged to form a cluster of star-shaped members. Each star-shaped member is formed of four pairs of sections with each pair extending perpendicularly to the adjacent pairs. Adjacent star members have a common pair of sections. At the junction point of the four pairs of sections in each star-shaped member, a separation space is provided into which the nozzles are directed.