Specification of Francis Lloyd : Furnace or fire-place.

  • Lloyd, Francis
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Francis Lloyd : Furnace or fire-place. Source: Wellcome Collection.

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    Lloyd's Improved Furnace or Fire-place, Qc. a wall in a circular form, about nine inches in thickness, and about three feet in height, and about twenty-two inches clear within, leaving an open space of about twenty inches in width in front, and opposite to which open space a par¬ tition Avail is raised across the said circular space with bricks to the whole height, and at about one third part of the diameter of the said circular space from the back part thereof; a proper fire grate is then laid on the remaining part, and extending in length from the front to the said partition wall. The space under the fire grate is the ash cave upon the said wall, and over the said fire grate I throw a common cast iron stove pot, of an hollow semi-globular form, but rather deeper than half a globe, and about two feet and six inches in diameter, having no opening in the top or sides but the fire door place. Within the said stove pot I make a partition of mettle to correspond with the said space between the space next the back part of the ash cave and the partition wall above mentioned in the said circular wall, or rather where good fire-bricks can be procured, I make the said division or partition by erecting the same therewith on the said first-mentioned partition; this partition is to be continued up the said stove pot to within about four inches of the top or crown of the same, the use of which is to give more activity to the fire; and the better to heat the said crown of the stove pot, a fire door place about eight inches wide (to which is put a fire door) is left in the part intended for the front part of the stove, which being done, this part is compleat. The situation is obvious, (that is to say,) the fire door will correspond with the opening in the ash cave (and the partitions with each other; about this circular wall and stove pot I erect a room about six feet square in the inside, they being in the centre. The walls of this room are raised six feet in height, from whence at the four corners I raise four pillars, about eight inches in height, upon which is placed a stone, iron, or other proper material, similar to what in common malt kilns are called spark stones or plates ; from the top of the said six foot walls and the bottom of the said pillars arches are sprung to abbut against the shell walls of the kiln at about fifteen inches below the under side of the kiln floor; the said arch being close and connected round the whole kiln, admits the heat from the spaces between the spark plate and the said square wall to diffuse itself only in the space between the said arches and the under side of the kiln floor; the draft from the stove pot is effected by means of a flue about twelve inches square communicating under the stove pot with the division before mentioned, and the space made by the partition in the first-mentioned circular wall separating the said space from the ash cave, and with a common chimney erected near any outside wall of the kiln. If it should be thought necessary, the said flue may be continued and conducted upon the said arch 15 20 2i 3Q 3*
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