AN IMPROVED DAMPER FOR CHIMNIES AND FLUES
Year: 1859

page_text: LETTERS PATENT to John Moore, of No. 46, New Road, Woolwich, in
the County of Kent, Ironmonger, for the Invention of "AN IMPROVED
DAMPER FOR CHIMNIES AND FLUES."
Sealed the 1st June 1860, and dated the 2nd December 1859.
PROVISIONAL SPECIFICATION left by the said John Moore, at the
Office of the Commissioners of Patents, with his Petition, on the
2nd December 1859.
I, JOHN MOORE, of No. 46, New Road, Woolwich, in the County of Kent,
Ironmonger, do hereby declare the nature of the said Invention for "AN
IMPROVED DAMPER FOR CHIMNIES AND FLUES," to be as follows:-
I form a casing of iron or other suitable material. This casing consists of
two cones; and I carry the slopes of the cones upwards and downwards until
they meet the sides of the chimney, into the brickwork of which I fix the
casing by a flange or shoulder. I leave a small interstice between the apex
or point of each cone; in this interstice I cause a damper or valve to work
horizontally across the chimney or flue. This damper or valve is bisected, and
each half is attached to cog slides. To the upper cone of the casing I affix
two spindles or rollers, having cog wheels at each end thereof, which cog
wheels work in the cog slides, and thus propel the damper or valve. One
end of each of these spindles I pass through the brickwork of the chimney to
the front of the fire-place over the mantelpiece, and attach a handle to them'

page_text: by which the damper or valve may be readily adjusted to any required point,
in case of smoke or downdraught, or totally closed in case of fire in the
chimney.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Moore, in the Great Seal Patent Office on the
2nd June 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, JOHN
MOORE, of No. 46, New Road, Woolwich, in the County of Kent, Iron-
monger, sends greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of December, in the year of our Lord
One thousand eight hundred and fifty-nine, in the twenty-third year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me
the said John Moore, Her special licence that I, the said John Moore,
my executors, administrators, and assigns, or such others as I, the said
John Moore, 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
DAMPER FOR CHIMNEYS AND FLUES," upon the condition (amongst others) that
I, the said John Moore, my executors or administrators, by an instrument
in writing under my or their or one of their hands and seals, should par-
ticularly 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 Moore, 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:-
I form a casing of iron or other suitable material. This casing consists of
two cones; and I carry the slopes of the cones upwards and downwards until
they meet the sides of the chimney, into the brickwork of which I fix the
casing by a flange or shoulder. I leave a small interstice between the apex
or point of each cone; in this interstice I cause a damper or valve to work

page_text: horizontally across the chimney or flue. This damper or valve is bisected, and
each half is attached to cog slides. To the upper cone of the casing I affix
two spindles or rollers, having cog wheels at each end thereof, which cog
wheels work in the cog slides, and thus propel the damper or valve. One end
of each of these spindles I pass through the brickwork of the chimney to the
front of the fire-place over the mantelpiece, and attach a handle to them, by
which the damper or valve may be readily adjusted to any required point,
in case of smoke or downdraught, or totally closed in case of fire in the
chimney.
Figure 1 of the Drawing annexed represents a front elevation of a chimney,
and the mode in which my Invention is fixed in the brickwork thereof;
Figure 2 is a side view of the casing, shewing a side view of the spindle and
damper; Figure 3 is a sectional elevation of the casing, with the dampers
closed, shewing also the horizontal cog slides and the spindles; and Figure 4
is a similar view to Figure 3, with the dampers open.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare what I claim is, the use
of horizontal cog slides and wheels, for the purpose of governing the bisected
dampers or valves, by which means I obtain a great nicety of adjustment of
the said dampers, for the purpose of preventing smoke in all cases of up or
down draughts.
In witness whereof, I, the said John Moore, have hereunto set my
hand and seal, this First day of June, in the year of our Lord One
thousand eight hundred and sixty.
5
Witness,
SAMUEL NYE,
42, Castle Street,
Holborn.
JOHN MOORE. (L.S.)