AST HARDING STRE NEAR FLEET STREET
Year: 1839

page_text: LONDON:
PRINTED BY GEORGE E. EYRE AND WILLIAM SPOTTISWOODE,
PRINTERS TO THE QUEEN'S MOST EXCELLENT MAJESTY:
PUBLISHED AT THE QUEEN'S PRINTING OFFICE, EAST HARDING STRE
NEAR FLEET STREET.

page_text: HARPER AND WALKER'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
HARPER, of Cowper's Court, Cornhill, in the City of London, Patent Stove
Manufacturer, and THOMAS WALKER, of Birmingham, in the County of
Warwick, Machinist, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by
Letters Patent, under the Great Seal of Great Britain, bearing date at
Westminster, the Tenth day of May, in the second year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto us, the
said William Harper aud Thomas Walker, Her especial licence, full
power, sole privilege and authority, that we, the said William Harper and
Thomas Walker, our exors, adiñors, and assigns, or such others as wc, the said
William Harper and Thomas Walker, our exors, adiñiors, 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, our Invention of "IMPROVEMENTS IN STOVES AND GRATES;" in
which said Letters Patent is contained a proviso that we, the said William
Harper and Thomas Walker, or one of us, shall cause a particular description
of the nature of our said Invention, and in what manner the same is to be
performed, to be 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.
NOW KNOW YE, that in compliance with the said proviso, we, the said
William Harper and Thomas Walker, do hereby declare the nature of our

page_text: said Invention and the manner in which the same is to be performed, are fully
described and ascertained in and by the following statement thereof, reference
being had to the Drawing hereunto annexed, and to the figures and letters
marked thereon (that is to say) :-
Our Invention relates to a mode of applying a series of tubular flues to
stoves and grates, whereby the heated vapours or products from the stove or
grate are caused to ascend some of such tubular flues, and enter a common
chamber, and to descend down others; and, further, the external surfaces of
such series of tubular flues act as heating surfaces to the air in the apartment,
room, church, or other building, wherein such stove or grate is employed.
DESCRIPTION OF THE DRAWING.
Figure 1 is a view in elevation of a stove or grate constructed according to
our Invention. Figure 2 is a section of Figure 1, whereby the nature of the
internal arrangement of the parts will more readily be traced. Figure 3 is a
plan in section of the series or cluster of tubes constituting the flues. In each
of these Figures the same letters of reference indicate similar parts; a, a,
represents the lower portion of the stove or grate containing the fire-place.
This lower portion consists of a quadrangular chamber (or it may be of other
convenient Figures), the front, sides, and back of which are of iron; b being
the fire-place which contains the fuel, and we prefer the same to be lined with
fire brick; and we also prefer that there should be a space c between the fire-
place and the metal of the outer surfaces a, a, though this is not essential;
but it is desirable in order to cause the outer metal to be heated by the inter-
vention of the heated air contained in the space c surrounding the fire-place;
and if it be desired there may be openings from the external atmosphere into
the space c, and a suitable pipe or pipes to convey heated air from such space c
into another room or place. We would, however, here remark that the arrange-
ment and construction of the lower part of the stove or grate separately forms
no part of our Invention. From the upper part of the stove or grate a, a,
ascend a series of tubes d, d¹, the tubes d being ascending ways, and the
tubes being the descending ways through which the heated vapours pass to
the chimney; and by this means a very extended surface is heated, and becomes
the heating means of the atmospheric air in the room or place in which the
stove or grate is placed; for it will be seen that the atmospheric air can circu-
late amongst the tubes d, d', and become heated by the external surfaces thereof.
The series of tubes d, d', enter into a chamber e; consequently the vapours in
passing from the fire-place all ascend through the tubes & into the chamber e,
and from that chamber e such heated vapours pass down the tube d', and enter

page_text: the flue f, which may pass away at a point below the stove or grate, or at an
intermediate point, as is indicated by the dotted lines, or even higher up.
We would remark that the number of the tubes d, d¹, may be varied accord-
ing to their size, and the extent of heating apparatus desired to be obtained;
g is a door or frame in front of the fire-place, which is glazed with talc; and
h is a small door to remove the ashes; the doors 9 and h should fit as closely
as possible to admit little air; i, i, are air-ways by which the supply of air to
support combustion may be regulated; and it should be stated that when the
stove is a close stove or grate, as above described, all parts should be as air-
tight as possible to prevent air entering to support combustion, excepting at the
openings i, i.
The fuel is supplied to the fire-place through the tube or way j, which has
a cover k fitting into a circular groove or recess filled with sand; but what-
ever be the supply of fuel the ignition will not ascend into the tube ; if the
same be kept air-tight; and the fuel we prefer to burn is anthracite or stone
coal, or coke of bituminous coal.
Having thus described our Invention, we would have it understood what we
claim as our Invention is the mode herein described of applying a series of
tubular flues and chamber e to stoves or grates.
In witness whereof, we, the said William Harper and Thomas Walker,
have hereunto set our hands and scals, the Ninth day of November,
in the year of our Lord One thousand eight hundred and thirty-nine.
(L.S.) HARPER.
THOMAS (L.S.) WALKER.
AND BE IT REMEMBERED, that on the Ninth day of November, in the
year of our Lord 1839, the aforesaid William Harper and Thomas Walker
came before our said Lady the Queen in Her Chancery, and acknowledged the
Specification aforesaid, and all and every thing therein contained and specified,
in form above written. Aud also the Specification aforesaid was stamped
according to the tenor of the Statute made for that purpose.
Inrolled the Ninth day of November, in the year of our Lord One thou-
sand eight hundred and thirty-nine.