Space simulating apparatus and method

Claim 1

A SPACE SIMULATIN VESSEL COMPRISING IN COMBIANTION AN OUTER SKIN, AN INNER SKIN INSULATED THEREFROM AND ENCLOSING AN EVACUABLE VOLUME, MEANS ASSOCIATED WITH THE INNER SKIN FOR COOLING SAID SKIN WITH A FIRST CRYOGEN TO A UNIFORM TEMPERATURE OF ABOUT 70* TO 120*K., A CHECKERWORK SYSTEM OF CRYOGENICALLY COOLED PLATES ADJACENT TO BUT SPACED APART FROM SAID INNER SKIN, A SHIELD FOR EACH OF SAID PLATES PROVIDED INTERIORLY THEREOF, MEANS ASSICIATED WITH SAID SHIELD FOR COOLING SAID SHIELD BY MEANS OF SAID FIRST CRYOGEN, MEANS FOR CIRCULATING A SECOND CRYOGEN THROUGH SAID CHECKERWORK SYSTEM OF PLATES TO COOL SAID PLATES TO A TEMPERATURE OF THE ORDER OF 20*K., MEANS FOR EVACUATING THE VOLUMNE ENCLOSED BY SAID INNER SKIN, AND MEANS FOR FLOODING AT LEAST A PORTION OF SAID ENDLOSED VOLUME WITH RADIATION, SAID INNER SKIN, SAID PLATES AND SAID SHIELDS BEING MADE OF METAL AND FINISHED SO THAT THE INTERIOR-FACING SURFACES OF SAID INNER SKIN AND SAID SHIELDS ARE BLACKENED AND THE EXERIOR-FACING SURFACES OF SAID SHIELDS AND ALL THE SURFACES OF SAID PLATES ARE BRIGHT FINISHED.