IMPROVEMENTS IN SETTING BOILERS."
Year: 1863

page_text: LETTERS PATENT to John Jewell, of Devoran, near Truro, in the County
of Cornwall, for the Invention of "IMPROVEMENTS IN SETTING BOILERS."
PROVISIONAL SPECIFICATION left by the said John Jewell at the Office
of the Commissioners of Patents, with his Petition, on the 28th July
1863.
1, JOHN JEWELL, of Devoran, near Truro, in the County of Cornwall, do
hereby declare the nature of the Invention for "IMPROVEMENTS IN SETTING
BOILERS," to be as follows:-
This Invention has for its object improvements in setting boilers. For
these purposes, in order to obtain more beneficial results in the consumption of
fuel, and at the same time to avoid the necessity for setting steam boilers in
brickwork or masonry where the outer surfaces of the boilers come in contact
with the lime contained in the mortar of the setting which is injurious to the
boiler, each boiler is at the parts which are below the water line therein formed
with an outer casing of iron plates rivetted together, and the space between the
outside of the boiler and the inside of the casing is divided by longitudinal
partitions, and thus a series of longitudinal flues are formed at each side of the
boiler. Exterior of such casing and flues, water tanks, or chambers are formed
wherein water is received and heated preparatory to its being supplied into the
boilers or used for other purposes. It is preferred in constructing flues to a

page_text: cylindrical boiler having an internal fire or furnace that there should be on each
side of the boiler three longitudinal flues constructed below the water line as
above explained. There should also be a central bottom flue, and the heat and
products of combustion from the internal fire or furnace having passed through
the boiler should then be divided and caused to pass through the two upper
longitudinal flues one on each side of the boiler, then back through the two
longitudinal flues immediately below, next they should be caused to return
through the two lowest of the longitudinal flues at the sides, and finally they
should be led into the bottom flue, which will conduct them to the stack or
chimney. By theso means the heat will not only be most advantageously
applied to the boiler, but also to the water tanks formed outside of the longi-
tudinal flues. When setting two or more cylindrical boilers side by side it is
preferred that the space or spaces between them should be formed into water
tanks, as before mentioned, in place of forming separate tanks to each boiler;
but each boiler may when desired have its separate water tanks constructed
outside of the longitudinal metal flues as above explained.
SPECIFICATION in pursuance of the conditions of the Letters Patent, file
by the said John Jewell in the Great Seal Patent Office on the 26th
January 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
JEWELL, of Devorau, near Truro, in the County of Cornwall, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of July, in the year of our Lord
thousand eight hundred and sixty-three, in the twenty-soventh year of Iler
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Jewell, Her special licence that I, the said John Jewell, my
executors, administrators, and assigns, or such others as I, the said John
Jewell, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during tho
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 "IMPROVEMENTS IN SETTING
BOILERS," upon the condition (amongst others) that I, the said John Jewell,
my executors or administrators, 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

page_text: 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 John Jewell, do hereby declare the
nature of the said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following state-
ment thereof, that is to say:-
This Invention bas for its object improvements in setting boilers. For
these purposes, in order to obtain more beneficial results in the consumption of
fuel, and at the same time to avoid the necessity for setting steam boilers in
brick work or masonry where the outer surfaces of the boilers come in contact
with the lime contained in the mortar of the setting which is injurious to the
boiler, each boiler is at the parts which are below the water line therein
formed with an outer casing of iron plates rivetted together, and the space
between the outside of the boiler and the inside of the casing is divided by
longitudinal partitions, and thus a series of longitudinal flues are formed at
each side of the boiler. Exterior of such casing and flues water tanks or
chambers are formed wherein water is received and heated preparatory to its
being supplied into the boilers or used for other purposes. It is preferred in
constructing flues to a cylindrical boiler having an internal fire or furnace that
there should be on each side of the boiler three longitudinal flues constructed
below the water line as above explained. There should also be a central
bottom flue, and the heat and products of combustion from the internal firo or
furnace having passed through the boiler should then be divided and caused to
pass through the two upper longitudinal flues one on each side of the boiler,
then back through the two longitudinal flues immediately below, next they
should be caused to return through the two lowest of the longitudinal flues at
the sides, and finally they should be led into the bottom flue, which will
conduct them to the stack or chimney. By these means the heat will not only
be most advantageously applied to the boiler but also to the water tanks
formed outside of the longitudinal flues. When setting two or more cylin-
drical boilers side by side it is preferred that the space or spaces between them
should be formed into water tanks, as before mentioned, in place of forming
separate tanks to each boiler, but each boiler may when desired have
its separate water tanks constructed outside of the longitudinal metal flues as
above explained.
And in order that my said Invention may be most fully understood
and readily carried into effect, I will proceed to describe the Drawings here-
unto annexed

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side view, partly in section, of a boiler with its setting and
flues arranged according to my Invention, and Figure 2 is an end view partly
in section of two boilers similarly arranged and with a water tank between
them.
a, a, are the boilers, they are supported on the standards b, b. On either
side are the flues c, c, d, d, and e, e, they are constructed in plate iron and
together form a casing for the parts of the boiler below the water line.
Figure 3 is a front view of a cast-iron plate or frame which is set flush with
the front of the boiler and it closes the several flues in front, it is, as is shown,
divided into several panels, each forming the end of one of the flues, and to
each panel there is a moveable stopper which is taken out when the flue is
cleaned; (Figure 1) is a chamber at the back of the boiler, the arrangement
of which is clearly shown at Figure 4. The flame and products of combustion
from the furnace at the front end of the tube a' within the boiler pass through
this tube to the back thereof and into the chamber f, they then return by the
uppermost fines c, c, on either side of the boiler to the front, when they descend
into the flues d, d, which lead them again to the back of the boiler where they
again descend into the flues e, e; and lastly, when at the front of the boiler they
enter the central flue 9 which passes along under the boiler and through the
standards b, b. This flue g leads the smoke and products of combustion into
the chimney h by which they escape; i, i, are water tanks exterior of the casing
and flues, and filling up the spaco between the boilers; these tanks are for
containing and heating the feed water.
In witness whereof, I, the said John Jewell, have hereunto set my
hand and seal, this Twenty-third day of January, in the year of our
Lord One thousand cight hundred and sixty-four.
JOHN JEWELL. (LS.)