178 81 Blackwell, J. and Alcock, T. for &c. - 183 24 24 - 144 - - Roberts, S. for his improvements - Page 24 233 258 199 74 257 187 85 149 69 255 307 310 205 305 Witty, R. for his improvements 247 gas - 248 Witty, R. for his improvements THE London JOURNAL OF ARTS AND SCIENCES. No. XLIII. [SECOND SERIES.] Recent Patents. TO WILLIAM CHURCH, of Haywood House, Bordsley Green, near Birmingham, in the county of Warwick, Esq. for his having invented or discovered certain improvements in apparatus applicable to propelling boats, and driving machinery by the agency of steam; parts of which improvements are also applicable to the purposes of evaporation.-[Sealed 29th November, 1830.] THE Patentee has arranged these improvements under the five following heads: 1st, the construction of furnaces for heating boilers, whereby a more perfect combustion of the fuel is obtained; 2nd, in the apparatus employed in supplying boilers with water; 3rd, in the construction of boilers; 4th, in the construction of steam VOL. VIII. SECOND SERIES. B engines properly so called; and 5thly, in the application of apparatus for recovering the heat that has been employed in generating steam or vapour, and thus economising fuel in all purposes of evaporation, the particulars of which will be understood by reference to the drawings. "Plate I. fig. 1, is an isometrical representation of a furnace attached to a boiler; A, A, is the outside or case, containing water and steam; the internal construction of the furnace will be best understood by reference to the vertical section, fig. 2, which is taken through the middle. 66 In this figure it will be perceived, that the coals represented as resting upon the fire bars G, G, were introduced down through a conical tube z, situated at the top of the furnace. The ash pit being closed, and the air for supporting combustion being conveyed in through the annular blast orifice Y, Y, the smoke is driven down among the ignited fuel, and the gases of combustion pass off through the fire flue in or under the boiler. Opposite to the fire flue is a small door н, carefully fitted to make it air tight; this door furnishes the means of removing cinders, and cleansing the flue; the door of the ash pit is also made air tight. By a careful inspection of the figures, the form and construction of the furnace will be apparent. "The apparatus for supplying the boiler with water is shown on the left hand in fig. 2, situated in the enlarged end of the feed pipe 1, which is nicely bored to receive it; J, is a cylinder, which is perforated longitudinally with four holes, as shewn in the plan fig. 3, two of these holes are seen at a, a, fig. 2, coinciding one with the lower end of the steam pipe b, and the other with the water pipe c; a disc of metal perforated with one hole at d, is |