AN IMPROVED BOILER FOR HEATING WATER FOR HEATING AND WARMING
Year: 1858

page_text: LETTERS PATENT to Edward Dench, of Chelsea, in the County of Mid-
dlesex, Hot House Builder, for the Invention of "AN IMPROVED BOILER
FOR HEATING WATER FOR HEATING AND WARMING."
Sealed the 2nd August 1858, and dated the 8th February 1858.
PROVISIONAL SPECIFICATION left by the said Edward Dench, at the
Office of the Commissioners of Patents, with his Petition, on the
8th February 1858.
I, EDWARD DENCH, of Chelsea, in the County of Middlesex, Hot House
Builder, do hereby declare the nature of the said Invention for "AN IMPROVED
BOILER FOR HEATING WATER FOR HEATING AND WARMING," to be as follows:-
I construct my boiler of two hollow sides which form water spaces, and
between them rivet or fix numerous tubes at the upper part, and again other
tubes at the bottom, through which the water circulates. Above and at right
angles to the last named set of tubes, I fix the bars upon which the fire is to
rest. I cause the flame and products of combustion after passing between the
upper set of cross tubes to descend and heat the outside of the water spaces.
A forked flue to receive the unconsumed products of combustion leads into a
chimney at the back of the boiler. When I construct the boiler of iron, then
I connect the side water spaces by two or more transverse water spaces, and
form the fire bars of hollow tubes which are fitted into these transverse water
spaces at right angles thereto.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Edward Dench in the Great Seal Patent Office on the
7th August 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
DENCH, of Chelsea, in the County of Middlesex, Hot House Builder, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of February, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Edward Dench, Her special licence that I, the said Edward Dench,
my executors, administrators, and assigns, or such others as I, the said
Edward Dench; my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands; and Isle of Man, an Invention for "AN IMPROVED
BOILER FOR HEATING WATER FOR HEATING AND WARMING," upon the condition
(amongst others) that I, the said Edward Dench, my executors or adminis-
trators, by an instrument.in writing. under my or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Edward Dench, do hereby declare the
nature of my said Invention, and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement
thereof, reference being had to the Drawings hereunto annexed, that is to
say:―
I construct my boiler, of which Figure 1 is a front view, shewing the case
in section; and Figure 2 is-a-cross-section of the-tubes through the line-x, x,
of Figure 1, of two hollow sides A, A, which form water spaces, and between
them rivet or fix numerous tubes B, B, at the upper part, and again other
tubes C, C, at the bottom, through which tubes the water circulates. Above
and at right angles to the last-named set of tubes I ordinarily fix the bars
D, D, upon which the fire is to rest. But when the boiler is to be heated by
the tubes are placed all the way down between the water spaces, leaving
only room enough to receive a hollow gridiron perforated with orifices for the
gas

page_text: gas jets or other gas burner. The boiler is entirely enclosed in a case E, E,
of cast iron, brickwork, or other suitable material. I cause the flame and
products of combustion, after passing between the upper set of cross tubes, to
pass over the water spaces, and descending, heat the outside of the water
spaces. A forked flue which receives the products of combustion leads from
the sides of the water spaces into a chimney at the back of the boiler, or I
connect a fluef to the top of the case as shewn in the Drawing. The water
is fed in through the pipes F, F, or otherwise circulates through the tubes,
and passes off through the pipes G, G, to various parts of conservatories or
other buildings to which the boiler may be applied. When I construct the
boiler of iron I connect the side water spaces by two or more transverse
water spaces, and form the fire bars of hollow tubes, which are fitted into
these transverse water spaces at right angles thereto.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim, the improved
boiler for heating water for heating and warming, herein-before described
and illustrated in the Drawings hereunto annexed.
In witness whereof, I, the said Edward Dench, have hereunto set my
hand and seal, this Seventh day of August, One thousand eight hun-
dred and fifty-eight.
EDWARD DENCH. (L.S.)