Specification of Zachariah Barratt : apparatus for sweeping, ventilating and extinguishing fires in chimneys.

  • Barratt, Zachariah.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Zachariah Barratt : apparatus for sweeping, ventilating and extinguishing fires in chimneys. Source: Wellcome Collection.

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    Barratt's Impts. in Apparatus for Sweqpmg^ and VenMatmg^ Chwmey^ will prevent condensed air or damps from entering the flue ; when the brush is I worked up the plate ascends into upper tube on the top of brush.. I sometimes 1 fix three or four pieces of wire into the upper tube and to outside of bottom tube for the stedying of the condensing plate in descending and ascending, in which plate I make corresponding holes for the wire to pass through. I make 5 j a stock for brush of wood, about four inches and a half diameter, and about the same in height with the hedges rounded off, leaving a surface of about three inches diameter on top and bottom. I reduce the middle part of the stock to about three inches in diameter, and about one inch and a half in height, leaving the top and bottom of the stock projecting about one inch and a 10 quarter, the edges of the projections rounded off, into which I cut seven grooves, more or less, into which grooves I fix rollers or pulleys with iron or copper wire, made secure in grooves sunk in the projecting edges of the stock ; the rollers or pulleys are intended to ease the action of the brush in passing the angles in the chimney, likewise to prevent the stock of the brush breaking 15 or rubbing off the plaster or parging; in the middle part of the stock I make about twenty-four holes, more or less, with a centre or nose bit, in which I fix whalebone or bristles, with pitch and rosin, or copper wire; the whalebone to be of sufficient length to sweep the angles of common chimneys, say, about seven or eight inches long, but which may be lengthened to any sized flue. 20 In the centre of the stock I make a hole for wire of iron or copper to pass through with an eye or bow at each end to attach the cord or chain to, which cord or chain acts upon the pulley in the upper part of the upper tube for the purpose of working the brush down and up the chimney. The operation of sweeping or shutting up the flue can be performed by hand or windlass, with 25 cord or chain, or partly cord and partly chain; if performed by hand, I make a chimney board or frame, in the upper part of which I cut two circular holes of about six inches diameter, to which I attach two sleeves of leather or cloth, with gloves for the operator’s hands while working the brush down and up the chimney, by which means the soot is prevented entering the room , if perfoimed 30 by windlass, I attach an iron frame to the back of chimney board to support a spindle, on the end of which is fixed a vertical pinion wheel with cheeks, which frame must be varied according to the construction of the chimney or file- place. To fix the brush when a machine is first put up, the cord or chain which works the brush down and up the chimney must be put over the pulley 35 in upper tube, then through the holes in condensing plate, then pass through the weight that is to prevent the cord or chain coiling or twisting in descend¬ ing to the fire-place, then fasten the cord or chain, one end to the eye or bow at the top of the brush, the other end to eye or bow at the'‘bottom of