Cool-down time of installation incorporating stirling cycle refrigerator

Claim 1

A RAPID COOL-DOWN SYSTEM FOR CRYOGENIC APPARATUS COMPRISING A COLD GAS REFRIGERATOR HAVING A WORKING MEDIUM, A SOURCE OF ELECTRIC CURRENT, A FIRST SOLENOID VALVE, A SECOND TEMPERATURE CONTROL SOLENOID VALVE, MEANS FOR OPERATING SAID SECOND TEMPERATURE CONTROL SOLENOID VALVE, A ONE-WAY VALVE, A FIRST ENCLOSURE FOR A VOLUME OF SAID WORKING MEDIUM, A PLURALITY OF LINES CONNECTING SAID FIRST SOLENOID VALVE, SECOND TEMPERATURE CONTROL SOLENOID VALVE, ONE-WAY VALVE AND FIRST ENCLOSURE TOGETHER, AND A TEMPERATURE CONTROL STORAGE VESSEL CONNECTED INTO SAID LINES BETWEEN SAID SECOND TEMPERATURE CONTROL SOLENOID VALVE AND SAID ONE-WAY VALVE, SAID FIRST ENCLOSURE STORING AN AMOUNT OF WORKING MEDIUM IN EXCESS OF THE AMOUNT NECESSARY TO CREATE THE REQUIRED PRESSURE FOR OPERATING SAID APPARATUS, SAID EXCESS AMOUNT OF WORKING MEDIUM BEING ADMITTED TO SAID APPARATUS UPON THE OPERATION OF SAID FIRST SOLENOID VALVE, AND SAID SECOND TEMPERATURE CONTROL SOLENOID VALVE BEING OPERATIVE AT A DETERMINED TIME TO PERMIT THE FLOW OF SAID EXCESS MEDIUM FROM SAID APPARATUS THROUGH SAID ONE-WAY VALVE INTO SAID FIRST ENCLOSURE.