Specification of James Pycroft : fire grates.

  • Pycroft, James.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Specification of James Pycroft : fire grates. Source: Wellcome Collection.

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    Pycroft's Improvements in Fire Grates. My Invention consists in a particular arrangement and construction of grates or fireplaces, whereby much of the heat heretofore lost is made available in heating a quantity of air either from the room in which the fire is contained, or from an inlet from the outer atmosphere; and such heated air may pass into and warm the same room in which the fire is contained, or ^ be conveyed to other rooms, as may be desired; and in order to carry my Invention into effect, I construct the sides, top, and part of the back of the grate or fireplace hollow, with proper inlets and outlets for the air to such hollow chambers. Description of the Drawing. 10 Figure 1 represents a front view of a grate or fireplace constructed accord¬ ing to my Invention; Figure 2, a side section thereof; and Figure 3, a section taken at the dotted line in Figure 1. In each of these Figures a is the fire¬ place for the fuel; 5, b, are the registers or inlets for the cold air when such air is derived from the room, c, c, are outlets for the air when it has become 15 heated by passing into the hollow chambers (d, d,) formed at the sides, back, and top of the grates or fireplaces. (e) is the flue, which is shewn as being of a rectangular form, but other forms may be used. This flue, it will be seen, stands back from the fire. The fire being brought as forward as possible, with a view to throwing as much heat as can be into the room, yet as such bringing 20 forward of the fire would tend to cause the smoke to enter the room in place of going up the chimney, and in order to prevent this I use a shield or cover, which which will descend and cover the upper part of the fire, and at the same time acts as a blower to excite the fire. (/) is the front part of the cover, which is hinged to the upper part of the grate or stove, on the inner 25 side of which the part (g) slides, so as to elongate the cover or shield when the same is drawn outwards for the purpose of covering the fire, as is shewn by the dotted lines in Figure '2. This part (g) has slits cut in it, and also pins or studds formed on the inner side of the part (/), which permits of its being drawn down, but is retained in any position by means of a screw pin on the 30 top of the of the shield and rack affixed on the side of the part (/), as shewn in the Drawing. When the fire is lighted, and fresh coal put on, the cover or shield f g, should be drawn down, so as to cover the upper part of the fire, and thus will the black smoke be directed up the chimney, and when the coal has burned up the cover or shield may be slided up, and be placed level 35 with the surface of the back of the stove, and only leave a small space for the smoke to pass to the chimney; and it will be evident, that so long as a fire is in the grate or fireplace the air which is contained in the hollow chambers