The annexed engraving is a vertical section of an improvement in kettles, invented by J. W. Hoard, of Providence, R. I., who has taken measures to secure a patent for the same. The improvement relates to making the kettle in such a manner that the heat, while the kettle is on the stove or furnace, will be applied to nearly the whole of the outside of the water. As kettles are commonly constructed, the heat is applied to only a small of the outside. Above the bottom, D, is a flange caston a kettle of hollow ware, brazed on a copper kettle, or soldered to a tin kettle. The kettle otherwise is the same as any in use. The space, /, is hollow and open, so as to let the heat ol the firepassup between theflange, D, and the outside of the kettle containing water. If the flange, D, is soldered, as in a tin kettle, the water will have to be kept at the horizontal line above the spout, but if it is of hollow ware (cast-iron) it need not be above the apex of the conical flange. If this kettle is placed on a stove opening, which is of a larger diameter than the bottom, it will readily be seen how the heat will pass up and circulate round a great outer portion of that part of the kettle containing the water, so as to boil the vessel much sooner. When such a kettle is placed on an open furnace, the same effect is produced, as the heat from the charcoal fire will be compressed, as it were, around the portion of the kettle containing the water. The flange, D, may be cast on a stove to effect the same object; this embraces the same principle, but is not shown in the engraving. More information respecting this improvement may be obtained by letter addressed to Mr. Hoard, at Providence.
This article was originally published with the title "Improvement in Making Kettles" in Scientific American 8, 37, 296 (May 1853)