Improvements in or connected with tubular heat exchangers, such as economisers for steam boilers

摘要

445,132. Gilled tubes for heatexchangers. DODD, J., 57A, Boulevard Botanique, Brussels. Jan. 19, 1935, No. 1863. [Class 64 (iii)] Tubes for economizers, &c., and of substantially streamline cross - section are cast with intercommunicating passages 2, 3 and integral fins 4. The tubes may be assembled with bars 6, Fig. 5, between them.