Patent GB-190228055-A (GB)
Title: Improvements in the Fireplaces of Cooking and Heating Ranges.
Inventor: CARTWRIGHT JOSEPH JOHN
Filed: 1902-12-19
Granted: 1903-12-10
Abstract: 28,055. Cartwright, J. J. Dec. 19. Cooking stoves and ranges; grates; flues.- The relative size of the fire space with reference to the ovens in cooking-ranges is reduced, and the space so recovered is converted into air shafts H, which supply heated air to the fire. Arrangements are made for dividing the fire of a cooking or heating stove or range into one or more independent fires, and for adjusting the height of these fires relatively to certain flues in the surrounding walls of the boilers and ovens. By preference, one horizontal perforated diaphragm G, which may also be covered by a removable arched perforated bottom j', Fig. 3, for further restricting the fire space in front, is bolted, or otherwise secured, to perforated side walls E, Fig. 12, or to a flat horizontal plate N, Fig. 8, some distance below, which may be supported on its underside by raising and lowering gear. Immediately below the perforated diaphragm is a pivoted draught regulator L having side wings, which almost cuts off the draught when closed, and when a plate, Fig. 2, is hung, or hinged, so as to close the perforations in the plate J, Fig. 11, which forms the front of the fireplace. The ashpan M may close the bottom of the fireplace, or be supported by the bottom plate, and it may be attached to the perforated front plate, or slide through it. The sides and back of the fireplace are formed by plates B, D of iron, steel, or other fire-resisting material, and may extend from the top of the range to the bottom, excepting certain portions which are cut away opposite flues. The side plates D may be perforated and the space between these plates and the oven filled with fireclay ; or the plates D may not be perforated, in which case the space between them and the oven is not filled with fireclay but forms a flue, down which the hot gases from the fire pass. These gases pass round the ovens in either direction, as shown by arrows in Fig. 12, to the flues 0, Q, which unite with the boiler flue to form a common chimney, Fig. 11. Inside the side plates are fixed perforated wall plates E, which are bent over, or have a horizontal portion at the top which is level with the top of the oven, and from air shafts H open at the bottom. The raising and lowering gear, two forms of which are shown in Figs. 8 and 10, moves the whole of the perforated diaphragm, horizontal plate, and pan and shield up and down the shaft formed by the perforated inner wall plates and the front and back plates. The material round the perforations may be raised, crater like, on its inner side as described in Specification No. 20,617, A.D. 1902. The Provisional Specification also describes a fireplace which is divided by two horizontal, flat, perforated diaphragms into two fire spaces, which may be used together or independently. These diaphragms, which are supported at the corners by bolts, extend from the front nearly to the back. The top plate, which slopes downwards and rearwards, suddenly dips down on to the middle diaphragm. When only one fire is used, the ashpan is placed on the lowest diaphragm, but removed to the bottom plate when both spaces are employed. The space under the bottom plate, and the portion where the ashpan is used, are protected by a double perforated plate. The bottom plate and its superstructure may be adjusted in height by any suitable devices, such as those indicated above. In some cases the upper fire space is divided by a hollow vertical perforated wall, passing from front to back.