AN IMPROVEMENT IN CERTAIN DESCRIPTIONS OF STOVES
Year: 1845

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
Сooк, of King Street, Golden Square, in the County of Middlesex, Coach
Maker, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Thirty-first day of July, in the ninth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
William Cook, His especial licence that I, the said William Cook, my exors,
adñiors, and assigns, or such others as I, the said William Cook, my exors,
adiiors, 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, and in all Her said Majesty's Colonies and
Plantations abroad, and also in the Islands of Guernsey, Jersey, Alderney,
Sark, and Man, my Invention of "AN IMPROVEMENT IN CERTAIN DESCRIPTIONS OF
STOVES;" in which said Letters Patent is contained a proviso, obliging me, the
said William Cook, 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
enrolled in Her said Majesty's High Court of Chancery within six calendar
months next and immediately after the date of the said in part recited Letters
Patent, as in and by the same, reference being thereunto had, will more fully
and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
William Cook, do hereby declare the nature of my said Invention to consist in
an improved apparatus for regulating the admisson of air to the stove for the
purposes of combustion, at the same time that provision is made to prevent
that admission of air being too much increased by the improper admission of
air through the ash-pit door.
And in further compliance with the said proviso, I, the said William Cook, do
hereby describe the manner in which my said Invention is to be performed, by
the following statement thereof, reference being had to the Drawings annexed,
and to the figures and letters marked thereon, similar letters being used to
denote similar parts wherever they occur.
.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side view of a stove of the description for which my Invention
is intended. A is the air door or valve; B is the case covering the expansive
regulating bar, which bar is shewn at Figure 2 on a larger scale. It will be
seen that this bar H is made of two metals, brass and iron, in the usual way;
but it is made thicker at one end than the other, which causes it to act more
powerfully than when it is of equal thickness from end to end, without
diminishing its extent of action or curvature. The screw C moves loosely
through the apertures D and E in the case B, and passes through the worm
of a female screw cut to fit it in the end of the bar H at G; and by this
arrangement it will be seen that as the bar contracts into a curve, or expands
into a straight line, the screw C with the swivel I at the end of it is depressed
or elevated, and the air door A is so arranged as to be opened or closed as this
swivel rises or falls. The air door is hung in the usual way on a horizontal
axis; across the centre to the upper half of it is fixed one end of the small rod
J, in eyes, in which it turns loosely, while the other end of the rod is fixed on a
pin joint to the side of the stove at F. On this rod slides the adjusting weight
K, and both are held up by the small chain L, which leads from the rod J to
the swivel I. S is a spiral spring attached to the chain L, which yields to
and acts in conjunction with the adjusting weight K;
from which arrangement
it follows that when the regulating bar H raises the swivel the air door shuts,
and when it depresses it the air door opens, while the adjusting weight K, the
spring S, and the regulating screw C, enable the most minute and accurate
adjustment of the apparatus to be made. Figure 6 is a vertical application of
the bar H, shewing how (in case of very minute regulation not being required)
the rod J, the adjusting weight K, the spring S, the pivot F, the chain L
and the link I, as denoted in Figure 1, may all be dispensed with, and the

page_text: regulating screw C made to act upon the air door A by pressing against the arm
of the bent lever P, P; but the value of these arrangements would be com-
paratively small if some plan were not adopted for preventing the improper
and generally accidental admission of an excess of air to the stove through the
ash-pit door, and which generally occurs when the fresh fuel is thrown upon
the fire through the fire door, and when the ash-pit door is generally opened
to increase the draft till the fuel burns up a little, when the stove door is
generally shut; but the ash-pit door is frequently carelessly or ignorantly left
open. The fact is, that in order to make the air door and draft regulator act
effectually, there ought always to be a corresponding action secured between the
stove door and the ash-pit door, so that each may be open and shut at the same
time. In order to secure this I connect them together, as shewn at Figure 1,
by the bar M, N being the ordinary stove door for feeding the fire, and O
the ash-pit door for raking out the ashes. Figures 3 and 4 show front views
of the doors in different positions; Figure 3, when open; and Figure 4, when
shut; and Figure 5 shows the bar M curved, and the doors shut; but it is
evident that there may be various means adopted of making these two doors
act together, so that they shall always open and shut simultaneously, which
will prevent any disturbance of the action of the air-admission regulating
apparatus.
Having now described the nature of my said Invention, and the manner
in which the same is to be performed, I hereby claim the following parts as
new and as constituting together my said Invention (that is to say):-
The particular form of the bar H, thicker at one end than the other, the
adjusting screw C passing through it and the case, in manner aforesaid.
The application of the adjusting weight K sliding on the rod J to the air
door A, and the connecting of the fire door with the ash-pit door in such
manner, or so arranging them as one door, or otherwise, that the closing of
the fire door closes also the ash-pit door, and that the door of the ash-pit
cannot be opened without at the same time opening the fire door, by which
means air is caused to pass over the top of the fire and into the chimney at
the same time that air is admitted below the fire at the ash pit, thereby pre-
venting that excess of heat which occurs when the fire door is shut and the
ash-pit door left open, and which counteracts the proper regulation of the
fire by the air door, and is thus liable to put out of order all self-acting
regulators.
And such my Invention being, to the best of my knowledge and belief,
entirely new, and never before used within that part of Her said Majesty's
United Kingdom of Great Britain and Ireland called England, Her said

page_text: Dominion of Wales, or Town of Berwick upon Tweed, nor in any of Her
said Majesty's Colonies and Plantations abroad, nor in the Islands of Guernsey,
Jersey, Alderney, Sark, or Man, I do hereby declare this to be my Specifi
cation 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
hereby claim to maintain exclusive right and privilege to my said Invention.
In witness whereof, I, the said William Cook, have hereunto set my
hand and seal, this Twenty-sixth day of January, in the year of our
Lord One thousand eight hundred and forty-six.
AND BE IT REMEMBERED, that on the Twenty-sixth day of January,
in the year of our Lord 1846, the aforesaid William Cook came before our said
Lady the Queen in Her Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained and specified, in form above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.
ane to zoof or as fiancee so hop venire Lquest one pers
thousand eight hundred and forty-six.