Partially cutaway model of a gas-bearing cryogenic turbo expander, and a complete miniature rotor for the turbine, by The British Oxygen Company Limited, England, 1974. Cryogenic Expansion Turbine from Gas Liquefier, 1974 1974
Early Collins type expansion engine used in helium liquefiers, by The British Oxygen Company Limited, England, 1970-75. Collins' Expansion Engine from Helium Liquefier, 1970-75 1970-1975