Insulated cold storage rooms or similar enclosures

Claim 1

IN COLD STORAGE APPARATUS OF THE CHARACTER DESCRIBED WITH THE INTERIOR THEREOF REFRIGERATED BY HEAT TRANSFER CONTACT WITH A COLD GAS AND HAVING SPACED APART INNER AND OUTER WALLS WITH HEAT-INSULATING MATERIAL DISPOSED THEREBETWEEN, SAID INNER WALLS HAVING HIGHER HEAT TRANSFERABILITY THAN SAID INSULATING MATERIAL, THE COMBINATION WHICH COMPRISES A SOURCE OF SAID COLD GAS, GAS-CIRCULATING GROOVES IN THE INNER SURFACE OF SAID INSULATING MATERIAL FORMING A NETWORK OF GAS-CIRCULATING PASSAGES EXTENDING THROUGHOUT SUBSTANTIALLY THE ENTIRE WALL AREA OF SAID APPARATUS BETWEEN SAID INNER WALLS AND SAID INSULATING MATERIAL, MEANS FOR INTRODUCING AND CIRCULATING AT LEAST A PORTION OF SAID COLD GAS THROUGH SAID GROOVES AND AROUND THE OUTSIDE OF SAID INNER WALLS AND IN HEAT-TRANSFER CONTACT WITH BOTH SAID INNER WALLS AND SAID INSULATING MATERIAL EFFECTING BOTH COOLING OF THE INTERIOR OF SAID COLD STORAGE APPARATUS AND REMOVAL OF MOISTURE FROM SAID INSULATING MATERIAL, SAID COLD GAS BEING MAINTAINED AT SUPERATMOSPHERIC PRESSURE IN SAID GROOVES FOR MINIMIZING LEAKAGE OF MOISTURE INTO SAID INSULATING MATERIAL FROM OUTSIDE SAID APPARATUS, AND MEANS FOR EXHAUSTING SAID GAS FROM SAID GROOVES TO THE ATMOSPHERE.