AN IMPROVED METHOD OF HEATING COPPERS, STILLS, AND BOILERS
Year: 1837

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
WALKER, of Allen Street, in the Parish of Lambeth, in the County of Surrey,
Oven Builder, send greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date
at Westminster, the Sixteenth day of February, in the seventh year of His reigu,
did, for Himself, His heirs and successors, give and grant unto me, the said
John Walker, His especial license that I, the said John Walker, my exors,
adiñors, and assigns, or such others as I, the said John Walker, my exors,
adñiors, 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 "AN IMPROVED METHOD OF
HEATING COPPERS, STILLS, AND BOILERS;" in which said Letters Patent is con-
tained a proviso obliging me, the said John Walker, by an instrument in
writing under my hand and seal, particularly to describe and ascertain the
nature of my said Invention, and in what manner the same is to be performed,
and to cause the same to be inrolled in His said Majesty's High Court of
Chancery within two calendar months next and immediately after the date of
the said recited Letters Patent, as in and by the same, reference being thereunto
had, will more fully and at large appear.

page_text: being had to the Drawing annexed, and to the figures and letters marked
thereon (that is to say) :-
DESCRIPTION OF THE DRAWING.
Figure 1 is a sectional side view of a boiler set with two flues, according to
my improved method, whereby I convey a more intense heat to the boiler from
a given quantity of coal than by the methods of heating boilers now in use, and
thus effect a great saving of fuel. A is the copper or boiler; B, the fire bars
of the furnace; C, C, the lower flue; D, D, the upper flue, and E the chimney.
The parts coloured red are my new flue bricks; those marked f are of the form
which I use for making the flue, and that marked g of the form which I use
for making the passages or channels through which the flame and heat are to
rise from one flue to the other. His the furnace door, and I, I, I, the ordinary
brick-work in which the furnace is set. Figure 2 is a plan of the lower flue
C, C, shewing the passages J, K, L, M, through which the heat and flame
pass and rise into the lower flue from the furnace, and as similar letters are
used to denote similar parts in all the Figures, no further description of this
Figure will be necessary. Figure 3 is a plan of the upper flue N, being the
passage or channel for the heat and flame to pass from the lower flue into the
upper flue, and O, the passage from the upper flue into the chimney. Figure 4
is a side view of one of my flue bricks, made of the best Stourbridge clay.
Figure 5 is a front view of two of my said flue bricks placed side by side, and
thus shewing the laps which form the close joints when they are built together
to form the flue; and Figures 6 and 7 are similar views of the passage or
channel brick made of the same materials.
Now whereas I claim as my Invention, first, the. arrangement of flues
and channels herein-before described, and, secondly, the channel or passage
brick, and forming the bricks of which the flue is to be built in such manner,
that when the flue is complete the top of the flue inside will be an arch of such
a form that, as the heat and flame rise to the top, they will be directed thence

page_text: against the copper or boiler, which arrangement of flues, passages, or channels,
forms of brick and construction of flues, constitute my said improved method of
heating coppers, stills, and boilers, to all of which it is of course equally appli-
cable; and such my Invention being to the best of my knowledge and belief
entirely new, and never before used within that part of His said Majesty's
United Kingdom of Great Britain and Ireland called England, His said
Dominion of Wales, or Town of Berwick upon Tweed, I do hereby declare
this to be my Specification of the same, and that I do verily believe this my
said Specification doth comply in all respects fully and without reserve or
disguise with the proviso in the said herein-before in part recited Letters
Patent contained. Wherefore I do hereby claim to maintain exclusive right
and privilege to my said Invention.
In witness whereof, I, the said John Walker, have hereunto set my
hand and seal, this Fifthteenth day of April, in the year of our Lord
One thousand eight hundred and thinte coron
Inrolled the Fifteenth day of April, in the year of our Lord One thousand
eight hundred and thirty-seven.