Heat exchangers

Claim 1

A HEAT EXCHANGER COMPRISING A PLURALITY OF HEAT EXCHANGER ELEMENTS EACH HEAT EXCHANGER ELEMENT COMPRISING TWO SPACED PARALLEL WALLS HAVING SMOOTH MARGINAL PORTIONS TO PERMIT ADJACENT ELEMENTS TO BE ASSEMBLED IN PERIPHERALLY SEALED DISPOSITION AND HAVING A PLURALITY OF APERTURES IN THE FACES THEREOF WITHIN SAID MARGINAL PORTIONS, A CORRESPONDING PLURALITY OF TUBULAR MEMBERS HAVING A LENGTH SUBSTANTIALLY EQUAL TO THE DISTANCE BETWEEN THE OUTER FACES OF SAID PARALLEL WALLS, THE ENDS OF EACH OF SAID TUBULAR MEMBERS BEING SECURED IN FLUID-TIGHT RELATIONSHIP TO THE PERIPHERY OF EACH OF SAID APERTURES, WHEREBY THE OUTER FACES OF SAID PARALLEL WALLS HAVE FLUSH SMOOTH FACES, SAID ELEMENTS BEING ASSEMBLED SUCH THAT THE TUBULAR MEMBERS OF ADJACENT ELEMENTS ARE NOT AXIALLY ALIGNED WHEREBY SINUOUS FLOW PATHS ARE PROVIDED, CLAMP MEANS TO HOLD SAID EXCHANGER ELEMENTS IN MUTUALLY SPACED PARALLEL ORDER WITH CHAMBERS BETWEEN ADJACENT ELEMENTS DEFINED BY THE OUTER FACES OF THE MUTUALLY FACING PARALLEL WALLS OF EXCHANGER ELEMENTS, MEANS TO CIRCULATE A FIRST FLUID THROUGH SAID HEAT EXCHANGER TO FLOW IN SUCCESSION THROUGH ALL SAID TUBULAR MEMBERS AND CHAMBERS IN SAID SUCCESSIVE SINUOUS PATHS, AND MEANS TO CIRCULATE A SECOND FLUID THROUGH THE INTERIOR OF SAID EXCHANGER ELEMENTS CAUSING SAID SECOND FLUID TO FLOW WITHIN ALL ELEMENTS BETWEEN THE PARALLEL WALLS THEREOF AND AROUND THE TUBULAR MEMBERS INTERCONNECTING SAID WALLS TO PROVIDE FOR EXCHANGE OF HEAT THROUGH THE EXCHANGER ELEMENT STRUCTURES BETWEEN THE TWO SAID FLUIDS RESPECTIVELY.