L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des

Bernard Manhes

Roger Prost

Francois Colomb

James E Nordman

Philippe Cardinne

Raymond Serve

The present invention relates to a method of and a cryogenic installation for distributing gases. From a storage tank at low pressure, successive portions of cryogenic liquid are withdrawn to an enclosure, which is isolated by closing a valve. After this, a further valve is opened, the effect of which is to cause the pressure in a receptacle to rise to the high distribution pressure and to allow the gas concerned to condense to a certain degree so that said enclosure is filled with liquid under pressure. The liquid evaporates partially at the periphery and is thus transferred to a heater and from there to a buffer container. The invention is applicable in particular to the distribution of oxygen, nitrogen and argon under pressure.

Distribution of gas under pressure

A Josephson junction comprises a cylindrical substrate having a flat end face disposed in a plane perpendicular to the axis of the cylinder. At least two bodies of superconducting material such as niobium, tantalum or vanadium are carried by the substrate and have boundary surfaces disposed in that plane. Insulating material and semiconductor material spaces apart the superconductors; and electrical supply means extend lengthwise of the cylinder to bring electric current to that plane. In one embodiment, the superconductors are disposed on opposite sides of the plane; while in another embodiment, they are all disposed on the same side of the plane.

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Grenoble, France

Bernard Manhes