Specification of James Buchanan : smoke-consuming apparatus applicable to boiler and other furnaces.

  • Buchanan, James.
Date:
1858
Catalogue details

Licence: Public Domain Mark

Credit: Specification of James Buchanan : smoke-consuming apparatus applicable to boiler and other furnaces. Source: Wellcome Collection.

    6/14 (page 4)
    Buchanan s Improvements in Smoke-consuming Apparatus. diately after firing, which is gradually diminished or lessened as the fuel is consumed, the latter allows air to pass freely at all times into the furnace; it prevents the bars from “ clinkering,” consequently the doors do not require to be opened for “ slicing,” which wastes fuel, and they can be so arranged that the fires in ocean-going steamers’ furnaces need not be burned down 5 when sponging or cleaning the flues at sea. But these my said improvements will be more clearly understood by reference to the accompanying Sheet of Drawings and the letters of reference thereon, in which Fig. 1 is a front elevation of a furnace door with my improvements attached; Fig. 2 is a section of a\ part of Fig, 1; Fig. 3 is a 10 section of an arrangement to do the same work as Fig. 2; Fig. 4 is a top view of Fig. 3; Fig. 5 is a plan view of a furnace bottom with my arrange¬ ment of bars; and Fig. 6 is a side elevation of my improved reciprocating or undulating bars. In Figs. 1 and 2 the same letters of reference are used to represent the 15 same parts in both views, a represents the furnace door frame; b, the slides, shewn shut; c, shews (broken off) the perforated plates or boxes for dis¬ tributing air, attached to the back of the furnace doors d. When the furnace doors are opened for adding fuel they move the lever e, which is attached to one of them. This lever opens a cock f supplied with water, and allows it 20 to flow into the cylinder or cistern a1; when sufficient water has run in to raise the float g to the top, the small arm h will shut the cock f\ the float g and spindle i being raised to the top, the balance lever j, j1, will be raised at the end marked^*1 and lowered at the other end; and as the slides b are connected to the lever j, j1, by the chains, links, or rods Jc, k, so the one will 25 be raised and the other lowered in the same proportion as the lever, and the space for the admission of air (namely, the furnace door apertures or boxes) will be opened. These slides work on the furnace doors’ hinge pins, and at the other end (or where necessary) on friction wheels. When the doors are shut after firing, the slides will begin to close (that, is, the one will be raised 30 and the other lowered) over the furnace door apertures or boxes in con¬ sequence of the water in the cylinder ax being reduced by running constantly off through the tap m; on this tap is a dial for regulating the quantity of water to be run from the cylinder, which is adjusted according to the state or pressure of the atmosphere and the quality of the fuel. If a large quantity 35 of air is required to cause proper combustion of the gases, a smaller quantity of water is allowed to run off; the float g therefore falls slower, and the slides b do not shut in so short a time as when a large quantity of water is allowed to flow through the tap m. The foregoing arrangement is intended for land