Patent GB-346699-A (GB)
Title: An improved method of and means for continuously manufacturing building bricks and the like
IPC: F27B9/14
Filed: 1930-01-08
Abstract: 346,699. Brick &c. kilns; conveyers; valves. FANTA, F., 14, Queen Victoria Street, London. Jan. 8, 1930, No. 755. [Class 51 (ii).] Bricks and like goods are conveyed separately, or in groups of separated units through drying, preheating and burning zones in counter current to the heating-gases, and the heat of the burnt bricks is utilized for heating the incoming bricks by radiation. In the kiln shown, comprising drying, preheating, burning and cooling sections A .. D, respectively, the goods are carried on wheeled trays 1, which are propelled by endless chains such as 11, 12, 25, 26, having prongs 21 engaging with the swivel pins of the trays. In the drying zone the trays are first elevated on an inclined track 4 to the top of the chamber, and then descend gradually along a zig-zag course, from the end of which they are taken by an elevator 9 and passed to the preheating chamber B, having horizontal tracks for the trays. At the lower end of this chamber the trays pass to the burning chamber C, in which they move along vertical paths, and they are finally fed at C<11> to an horizontal cooling-track 30, extending beneath the chambers B, C, and through the lower part of the chamber A. Transfer of the trays between the conveyers at the entrance and exit of the chamber B, and between the tracks 7, 9, is effected along inclined rails, and at these points scotching devices, operated by cams on-the sprocket wheels of the endless chains, are provided for delaying the movement of a tray until the preceding one has been sufficiently advanced by the chains. The chambers B, C are double walled, and the swivel pins of the trays pass through slots in the inner walls so that the driving-chains can be fitted in the interspace, and there kept cool by a current of air which'may be used for secondary combustion. The driving chain at the two sides of these chambers are synchronized by external cross shafts. The heating of the chamber C is effected by burners W, X delivering into hollow perforated baffles T, and the heating-gases are caused to follow a tortuous course through the chambers C, B in succession by interdigitation of the baffles T, m. Additional burners are provided in the chamber B, and when desired the chambers B, C may be isolated for independent heating by doors P, the conveying mechanism then being stopped. Multiple-way valves.-The gas and air supplies to the burners are controlled simultaneously by a valve consisting of a casing 39, Fig. 8, having inlet and outlet ports 42, 43 for gas, and 46, 47 for air, the port 46 being fitted with a control slide 48. A chambered slide member 50 provides connections between the respective inlet and outlet ports, and is pressed into contact with the ported wall of the casing by springs 53 bearing against a sliding plate 51. Fluid-acticated valves.-The gas and air pressures are controlled automatically by the pressure difference on the opposite sides of an apertured partition 57, Fig. 7, acting on a valve 64 through water sealed bells 60, a lever 62 and link 63.