IMPROVEMENTS IN SUPPLYING AIR POR PROMOTING AND SUPPORTING THE COM- BUSTION OF FIRE IN CLOSE STOVES AND FURNACES, AND ECONOMIZING FUEL THEREIN
Year: 1838

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE.
HARRISON, of Carlton House Terrace, in the Parish of Saint Martins in the
Fields, Surveyor, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent, under the Great Seal of Great Britain, bearing date at West-
minster, the Seventeenth day of October, in the second year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto me, the said George
Harrison, Her especial license, full power, sole privilege and authority, that I,
the said George Harrison, my exors, adññors, and assigns, or such others as I, the
said George Harrison, my exors, adñors, or assigns, should at any time agree
with, and no others, from time to time and at all times during the term of years
therein expressed; should and lawfully might make, use, exercise, and vend,
within England, Wales, and the Town of Berwick upon Tweed, my Invention
of "IMPROVEMENTS IN SUPPLYING AIR POR PROMOTING AND SUPPORTING THE COM-
BUSTION OF FIRE IN CLOSE STOVES AND FURNACES, AND ECONOMIZING FUEL THEREIN,":
in which said Letters Patent is contained a proviso that I, the said George
Harrison, shall cause a particular description of the nature of my said Inven-.
tion, and in what manner the same is to be performed to inrolled in Her
said Majesty's High Court of Chancery within six calendar months next and
immediately after the date of the said in part recited Letters Patent, as in
and by the same, reference being thereunto had, will more fully and at large
appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, 1, the said
George Harrison, do hereby declare that the nature of my Invention, and the
manner in which the same is to be performed, are fully described and ascer-
tained in and by the following statement thereof, reference being had to the
Drawings hereunto annexed, and to the figures and letters marked thereon,
(that is to say):-
First, there are spaces for air made in the two sides of the stove, as shewn in
the transverse section, Figure 1. In these spaces, beginning at A, B, air con-
ductors are adapted for introducing the external air through the apertures of
a three quarters of an inch iron pipe, bent and conducted, as shewn by the
Drawing, from the upper part of the fire-place, and carried downwards close
underneath the fire bars, as shewn at C, D, for the admission of air entering
in at A, B.
Secondly, two three quarters of an inch air conducting pipes are fixed to the
front of the apparatus, stove, or fire enclosure, as at E, F, in Figure 3, and
adapted to enter into the fire at G, H, as shewn by the transverse section,
Figure 1, and the longitudinal section, Figure 2; a slide is fixed to the front in
order to have the means of opening or shutting these last-mentioned air con-
ducting pipes for the purpose of checking the supply of air to the fire through
them when the intensity of the heat is great; the air apertures at G, H, are
five sixths less than at their entrance E, F, in stoves, and three sixths less in
furnaces, for the latter the apertures should be widened at the mouth in order to
spread the air that is admitted through the apertures G, H, into the fire. For
furnaces the air conducting pipes may be placed wholly in front, in case it
might not be convenient to adapt them to the sides, so that they are adapted at
the level of the top of the fire, and conducted to close underneath the bars of
the grate holding the fire, where the air then circulates and passes through it;
these spaces are to be made and varied in proportion to the size of the fire-
place, allowing equal to inch spaces or apertures at A, B, C, D, and at E, F,
Figures 2 and 3, for every six inches cubical contents of fire-place.
Thirdly, the door should be perforated with small apertures, as shewn in the
elevation, Figure 3, M, N, three sixteenths of an inch in diameter, which may
be varied also according to the size of the fire-place, reckoning from the cubical
contents of fire-place stated in my first and second claim.
Fourthly, an inch air pipe, as shewn at K, L, Figures 1 and 2, is to be
constructed at the back of the fire for the same proportion of fire-places. The
within-mentioned applications of the apertures for supplying air to the fire are
to be used with closed ash pits or drawers. The useful purposes to which these
improvements are applicable are to cause a great saving in all sorts of fuel,

page_text: more especially that description of fuel where the gascous products consist
chiefly of carbon, such as in the anthracite or coke, and for the purpose of
causing the fire to burn more regularly, and for more effectually supporting
combustion, without that combustion being too rapid, with a view to economize
the fuel, as before mentioned, and render the air more effective by which the
combustion is supported.
In witness whereof, I, the said George Harrison, have hereunto set my
hand and seal, this Fifteenth day of April, One thousand eight hundred
and thirty-nine