Refrigerating and air conditioning apparatus

Claim 1

REFRIGERATION APPARATUS FOR UTILIZING THE LATENT HEAT OF VAPORIZATION OF A VOLATILE, NORMALLY LIQUID FUEL TO EFFECT COOLING COMPRISING: (A) AN ELONGATED, GENERALLY TUBULAR COOLING COIL HAVING FIRST AND SECOND CLOSED ENDS; (B) A REFRIGERANT INTAKE COIL OF SMALLER DIAMETER AND LESSER LENGTH THAN SAID FIRST COIL PASSING INTO SAID FIRST COIL ADJACENT THE FIRST END THEREOF AND EXTENDING THROUGH A MAJOR PORTION OF THE LENGTH OF SAID FIRST COIL, SAID REFRIGERANT INTAKE COIL HAVING ITS END OUTSIDE SAID FIRST COIL CONNECTED TO A SOURCE OF SAID VOLATILE, NORMALLY LIQUID FUEL; (C) A SOURCE OF VACUUM CONNECTED TO THE FIRST END OF SAID COOLING COIL; (D) A TUBULAR CONDUIT OF SMALLER DIAMETER THAN SAID COOLING COIL PASSING INTO THE SECOND END OF SAID COOLING COIL AND TERMINATING WITH ITS END INSIDE SAID COOLING COIL IN SPACED RELATION TO THE END OF SAID REFRIGERANT INTAKE COIL IN SAID COOLING COIL; AND (E) VALVE MEANS CONNECTED TO THE END OF SAID TUBULAR CONDUIT OUTSIDE SAID COOLING COIL FOR ADJUSTING THE AMOUNT OF AIR DRAWN INTO SAID COOLING COIL THROUGH SAID TUBULAR CONDUIT BY SAID SOURCE OF VACUUM.