IMPROVEMENTS IN REGULATING THE ADMISSION OF AIR INTO THE FURNACES
Year: 1863

page_text: LETTERS PATENT to John Goucher, of Worksop, in the County of
Nottingham, Ironfounder, Engineer, and Machinist, for the Invention of
"IMPROVEMENTS IN REGULATING THE ADMISSION OF AIR INTO THE FURNACES
Sealed the 4th August 1863, and dated the 9th February 1863.
PROVISIONAL SPECIFICATION left by the said John Goucher at the
Office of the Commissioners of Patents, with his Petition, on the
9th February 1863.
I, JOHN GOUCHER, of Worksop, in the County of Nottingham, Ironfounder,
Engineer, and Machinist, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN REGULATING THE ADMISSION OF AIR INTO THE FURNACES
OF STEAM BOILERS," to be as follows:-
My Invention consists in regulating the admission of air into the furnaces
of steam boilers by means of a spring or weighted piston acted upon directly
by steam from the boiler, and connected by a rod with the valve or damper in
the furnace door. According to the pressure of steam in the boiler so will the
valve or damper be more or less closed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Goucher in the Great Seal Patent Office on the
8th August 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
GOUCHER, of Worksop, in the County of Nottingham, Ironfounder, Engineer,
and Machinist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Ninth day of February, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Goucher, Her special licence, that I, the said John Goucher,
my executors, administrators, and assigns, or such others as I, the said
John Goucher, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times there-
after 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 REGULATING THE ADMISSION OF AIR INTO THE FURNACES OF
STEAM BOILERS," upon the condition (amongst others) that I, the said John
Goucher, 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 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 Goucher, do hereby declare
the nature of my said Invention, and in what manner' the same-is to be per-
formed, 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 :-
My Invention consists in regulating the admission of air into the furnaces
of steam boilers by means of a spring or weighted piston, acted upon directly
by steam from the boiler, and connected by a rod with a valve or damper in
the furnace door. According to the pressure of steam in the boiler so will the
valve or damper be more or less closed.
Figure 1 of the accompanying Drawings is an end view of a boiler furnace
fitted with a valve; according to my Invention, for regulating the admission of

page_text: air into the furnace; Figure 2 is a section of the same through the line C, D,
of Figure 1.
a is the valve fitted to the furnace door b, and connected by a rod c, fork d,
and cross head e, with a spring piston working in a cylinder g. Steam from
the boiler presses upon the under side of the piston f and the spring, which is
tempered to the ordinary working pressure of the boiler contracts; when the
ordinary working pressure is exceeded, the piston rod h presses upon and raises
the cross head e, and consequently the fork d, and rod c, and the valve a is
acted upon, so as to admit air through the furnace door. The greater the
pressure of steam in the boiler the more will the valve a be opened, and the
greater therefore will be the quantity of air admitted through the furnace
door; Figure 3 is an end view of a boiler furnace fitted with a damper a in
the furnace door instead of a valve, as last described; and Figure 4 is a
transverse section through the line A, B, of Figure 3. The action is the same
as in the arrangement represented in Figures 1 and 2, and similar letters refer
to corresponding parts.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim regulating the
admission of air into the furnaces of steam boilers by means of a spring or
weighted piston acted upon directly by steam from the boiler, and connected
by a rod with a valve or damper in the furnace door, substantially in manner
herein-before described and illustrated in the accompanying Drawings.
In witness whereof, I, the said John Goucher, have hereunto set my
hand and seal, this Seventh day of August, One thousand eight hundred
and sixty-three.
JOHN GOUCHER. (L.B.)