Heat Exchanger with controls and blood pumps for "The Westminster Profound Hypothermia Unit" for cardiac surgery, developed by Charles Drew at Westminster Hospital, c.1960. Heat Exchanger for The Westminster Profound Hypothermia Unit, 1960s. 1959-1961
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
Sectioned example of a Hampson air liquefier, fitted with 2 mercury Fahrenheit thermometers by Negretti and Zambra, by The British Oxygen Company Limited., London, England, 1934. Hampson Air Liquefier by the British Oxygen Co. Ltd., 1934 1934