Specification of David Evans : apparatus for sweeping and regulating draught in chimneys.

  • David Evans
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of David Evans : apparatus for sweeping and regulating draught in chimneys. Source: Wellcome Collection.

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    Evans Improvements in Sweeping and Cleansing Chimneys, apparatus as in use. Figure 3, a detached plan view of a brush to be employed in sweeping chimnies. Figure 4, a vertical section of the same. Figure 5, a detached front view of a metal chimney pot. Figure 5* an ho metrical view of a chimney stack, with improved metal pots. Figures 6, 7, 8, represent 5 detached parts of the apparatus. In Figure 1, a, a, represents the inside of a chimney, at the top of which a chimney pot 5, 5, of metal or other suitable material, is securely fixed; at the upper part of this metal pot a hook c is made fast, for the purpose of carrying a pulley d, which is suspended therefrom by an eye e (see detached Figures 6 and 7); over this pulley a wire rope or 10 chain/,/, is passed, the ends of which are furnished with hooks, which are passed over hooks 4 and 5 fixed to the brickwork at each side of and at a convenient distance above the fire grate or stove, so as to remain suspended in the chimney, when it is not required to use the other parts of the apparatus, in the employment of which the operation of cleansing chimnies is conducted in 15 manner following :—Metal hooks (similar to that shewn at detached Figure 8) being attached to the ends of a hempen rope g, (which for durability I prefer being of similar construction to that known as Patent “sash line,”) the operator connects it to one end of the wire rope/ by the hook fixed thereto, when by pulling the other end of the wire rope in the direction of the arrow’s 20 flight, the hempen rope will be passed over the pulley d, the operator con¬ tinuing to pull until he has brought the entire length of the wire rope down the chimney, and disconnecting the ropes, proceeds next to connect the brush h to the rope <7, by passing the hook fixed thereto through an eye 3, fixed to the brush, as shewn, and subsequently passing the other end of the rope through 25 the centre of the brush (which is constructed with a hole through it for that purpose (see detached Figures 3 and 4), connects it to the under side of the brush in manner as before. This comprises the whole of the apparatus, the action of which is as follows :—The operator having introduced the brush into the chimney, imparts to the same an upward motion by pulling the cord 1; but 30 in order that the brush as it advances may be more effectual in the removal of the soot, it will be found necessary to pull the cord 2 slightly, which will impart to the brush a rocking or vibrating motion, thereby rendering it very effective, particularly at the angles or bends of the chimney, which require more than the ordinary motion of the brush to remove the accumulation of 35 soot at these parts; the operator having worked the brush a sufficient time according to his judgment, traverses the brush downwards, and disconnecting the same from the rope g, proceeds to replace or suspend the wire rope / in the chimney; to effect which, similar means are employed to those for passing the cord over the pulley. This being done, and the ends of the wire rope or