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

Jacques Broche

Roger Prost

A method and apparatus for generating low temperatures, of the type which employs two regenerators whose hot ends are connected via changeover valves alternately to the input and output of a compressor and cooler assembly and whose cold ends are connected by a constricted passage which form a cold source. In accordance with the invention, the changeover valves are controlled by means which are subject to a reference pressure.

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Echirolles, France

Jacques Broche