Tube heat exchanger

Claim 1

IN A TUBULAR HEAT EXCHANGER, A CYLINDRICAL HOUSING FOR RECEIVING AND PASSING A HEATING FLUID THERETHROUGH; A PLURALITY OF CYLINDRICAL HELICES OF PROGRESSIVELY INCREASED DIAMETERS, SAID HELICES BEING EQUALLY SPACED FROM EACH OTHER AND NESTED WITHIN EACH OTHER AND CONCENTRICALLY DISPOSED WITHIN SAID HOUSING IN AXIAL ALIGNMENT THEREWITH FOR FLOW OF A SINGLE HEAT ABSORBING FLUID THERETHROUGH; EACH HELIX BEING FORMED OF A BAND OF PARALLELLY SPACED TUBES WOUND ABOUT AN IMAGINARY CYLINDER; THE NUMBER OF PARALLEL TUBES COMPRISING EACH BAND INCREASING IN ARITHMETICAL PROGRESSION BY A CONSTANT WHOLE NUMBER FROM THE INNERMOST HELIX TO THE OUTERMOST HELIX; THE PITCH, TUBE SPACING, AND LENGTH OF THE TUBES OF ONE HELIX AND THE AXIAL LENGTH THEREOF BEING EQUAL TO THE PITCH, TUBE SPACING, AND LENGTH OF TUBES AND AXIAL LENGTH OF ANY OTHER HELIX, AND THE DIAMETERS OF SAID HELICES BEING PROPORTIONAL TO THE RESPECTIVE NUMBER OF TUBES OF WHICH EACH HELIX IS FORMED, TO ACHIEVE UNIFORM COOLING AND FLOW LOSSES OF THE HEATING FLUID AS IT PASSES THROUGH SAID HOUSING AND UNIFORMLY EQUAL HEATING AND FLOW LOSSES OF THE HEAT ABSORBING FLUID AS IT PASSES THROUGH EACH OF SAID TUBES OF EACH OF SAID HELIXES, WHEREBY THE MOST ECONOMICAL USE IS MADE OF THE SPACE WITHIN SAID HOUSING.