Specification of William Brunton : fire grates, &c.

  • Brunton, William.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Brunton : fire grates, &c. Source: Wellcome Collection.

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    JBruntons Improvements in Fire Grates, §c. its greatest height, the air ring projecting downwards will enter the sand sufficiently to prevent the admission of air between the air ring and the said sand trough; when the grate is lowered the sand trough leaves the air ring, and the grate descends into a circular chamber of fire brick formed by a wall which is built perpendicularly from the level of the air ring upwards, having an 5 insterstice round the brick ring of one inch and half. I at the same time retard the combustion of the coal upon the grate by closing the opening of the ash pit by doors attached thereto, and thus prevent the free admission of atmo¬ spheric air. In that part of the furnace which is above the level of the brick ring, I fix a fire door of the usual construction, for the purpose of cleaning and 10 lighting the fire, and also at a convenient place near to the said door, and in the direction of a tangent of a radius of nine inches from the centre of the grate, an opening is formed through the brickwork of the side of the furnace, of suitable dimensions for the introduction of the coal, as hereafter described. Connected with the said opening and extending in the same direction beyond 15 the brickwork of the furnace, I fix an oblong close box or case of wrought or cast iron (which I call the shovel box), of sufficient dimensions to receive the shovel with its wheels (as hereafter described), and having suitable openings with doors thereon in its sides for the purpose of examining or oiling the wheels of the shovel. In the top of the said shovel box and in the direction of its 20 length, I make a hole or opening, the length of which is equal to half the diameter of the grate, and its width about five inches (this I call the feeding hole); over the said feeding hole is placed a box, which I call the fire feeder, or for brevity, the feeder, which is made large enough to contain a supply of coal sufficient for one or more hours; this fire feeder is in shape similar to the 25 hopper of a corn mill, excepting that the bottom is made oblong, its length being equal to half the diameter of the grate, and its width about nine inches; the aperture through which the coal passes from the fire feeder is on one of its sides and close to the bottom, and this aperture is adjusted to the size of the pieces of coal used by means of a sliding shutter, raised or lowered as occasion 30 may require, say, varying from two to five inches. The bottom of the fire fender is an iron plate, about twelve inches wider than the lower orifice thereof, and inclines downward about one in six towards the side on which is the aperture for discharging the coal and in the same direction ; it has a reciprocating motion upon a pivot fixed at that end of the bottom of the fire feeder which is next 35 the grate (that is, the pivot is nearly or directly over the end of the feeding hole next the grate), by which reciprocating motion the coal resting upon the bottom of the fire feeder, that (is on the said iron plate which has the said reciprocating motion) is passed through the aforesaid opening in the side of the