IMPROVEMENTS IN STEAM BOILERS
Year: 1853

page_text: PROVISIONAL SPECIFICATION left by the said Weston Grimshaw
at the Office of the Commissioners of Patents, with his Petition,
on the 25th October 1853.
4
1, WESTON GRIMSHAW, of Mossley, County Antrim, Ireland, do)
hereby declare the nature of my Invention for "IMPROVEMENTS IN STEAM
BOILERS to be as follows:-
This Invention has for its object the so arranging and combining.
steam boilers that the same fire and furnace may be einployed to boilers
generating steam of different pressures. For this purpose the portion
of the combined boilers in which the highest pressure of steam is
generated is that to which the furnace is constructed, and in place of the
heat and products of combustion passing from such first boiler to the

page_text: chimney, they are caused to pass through tubular flues formed through
the next boiler, the water spaces and chests of the two boilers being
separated; in fact, the two boilers are made independent, and are only
set or fixed together in order that the second steam boiler may derive
the heat passing from the same furnace, or the same furnaces where
more than one furnace is used, to the first steam boiler; by these means
an economy of superintendence and consumption of fuel will result.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Weston Grimshaw in the Great Seal Patent
Office on the 25th April 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, J,
WESTON GRIMSHAW, of Mossley, County Antrim, Ireland, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fifth day of October, in the year
of our Lord One thousand eight hundred and fifty-three, in the seven-
teenth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Weston Grimshaw, Her special licence that
I, the said Weston Grimshaw, my executors, administrators, and assigns,
or such others as I, the said Weston Grimshaw, my executors, admi-
nistrators, 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 "IMPROVEMENTS IN STEAM
BOILERS," upon the condition (amongst others) that I, the said Weston
Grimshaw, by an instrument in writing under my hand and seal, 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.

page_text: NOW KNOW YE, that I, the said Weston Grimshaw, do hereby
leclare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
n and by the following statement thereof (that is to say):
This Invention has for its object the so arranging and combining
steam boilers that the same fire and furnace may be employed to boilers
generating steam of different pressures. For this purpose the portion
of the combined boilers in which the highest pressure of steam is
generated is that to which the furnace is constructed, and in place of
the heat and products of combustion passing from such first boiler to
the chimney they are caused to pass through tubular flues formed
through the next boiler, the water spaces and chests of the two boilers
being separated; in fact, the two boilers are made independent, and
are only set or fixed together in order that the second steam boiler
may derive the heat passing from the same furnace, or the same
furnaces where more than one furnace is used, to the first steam boiler;
by these means an economy of superintendance and consumption of fuel
will result.
Having thus stated the nature of the Invention, I will proceed to
describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1, is a section of a steam boiler constructed according to my
Invention Figure 2, is a transverse section of the fore part of the
boiler; Figure 3, is a front view; Figure 4, is a plan in section;
Figure 5, is a back end view; and Figure 6, is a transverse section of
the hinder part of the boiler. By this arrangement or combination of
boilers it will be evident that by reason of there being two distinct
boilers so arranged as to come together and receive the heat from the
same fire, that steam of different pressures may be raised in the two
boilers, and thus offer a great convenience to manufacturers who require
one pressure of steam for one purpose, and another pressure of steam
for another purpose.

page_text: Having thus described the nature' of my said Invention, and the
manner of performing the same, I would state that I do not confine
myself to the precise form or arrangement shown in the Drawing; but
what I claim is, the combination herein described. "
In witness whereof, I, the said Weston Grimshaw, have here-
unto set my hand and seal, this Twenty-second day of April,
in the year of our Lord One thousand eight hundred and
fifty-four.
Witness,
SAMUEL PORTER.
WESTON GRIMSHAW. (L.S.)