AN IMPROVED CONSTRUCTION OF CHIMNEY POT
Year: 1868

page_text: LETTERS PATENT to Jesse Wheatley, of East Moulsey, in the County
of Surrey, Builder and House Agent, for the Invention of "AN
IMPROVED CONSTRUCTION OF CHIMNEY POT."
Sealed the 14th August 1868, and dated the 21st February 1868.*
PROVISIONAL SPECIFICATION left by the said Jesse Wheatley at
the Office of the Commissioners of Patents, with his Petition, on
the 21st February 1868.
I, JESSE WHEATLEY, of East Moulsey, in the County of Surrey,
Builder and House Agent, do hereby declare the nature of the said
Invention for "AN IMPROVED CONSTRUCTION OF CHIMNEY POT," to be as
follows:-
The object of this Invention is to construct a chimney pot that
will induce or create an up draught. in the chimney to which it is
applied in whatever direction the wind may blow. To this end I form
a square tube of sheet metal with parallel sides for the greater part
of its length, but terminating at bottom in a tapering enlargement
with a flanged foot. This tube I surround for the greater part of its
length with a circular tube of just sufficient diameter at its upper part

page_text: to receive the square tube. The circular tube at the level at which
the diameter of the square tube commences to increase is also increased
in diameter by giving it a conical extension downwards for a short
distance, beyond which it terminates in the form of hooded projections.
that overhang the several inclined faces of the square tube. The inner
and outer tubes are secured together by solder or otherwise at the points
of contact, and four vertical air channels are thus formed within the
chimney pot by the space enclosed between the inner and outer tubes.
When the wind blows against the exposed or uncovered portion of the
square tube the wind will pass up under the hood that overlies the
face presented thereto, and it will find an exit at the top of the chimney
pot. The heat of the struggling internal current of combustible gases
will also assist this action, and thus an efficient draught will be
maintained in the chimney whatever may be the direction of the wind.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Jesse Wheatley in the Great Seal Patent Office
on the 20th August 1868..
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JESSE
WHEATLEY, of East Moulsey, in the County of Surrey, Builder and
House Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-first day of February, in the
year of our Lord One thousand eight hundred and sixty-eight, in the
thirty-first year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Jesse Wheatley, Her special licence
that I, the said Jesse Wheatley, my executors, administrators, and
assigns, or such others as I, the said Jesse Wheatley, 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, excrcise, and vend;
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "AN IMPROVED CONSTRUCTION
OF CHIMNEY POT," upon the condition (amongst others) that I, the said
Jesse Wheatley, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should

page_text: 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 Jesse Wheatley, do hereby declare
the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the Drawing here-
unto annexed, and to the letters and figures marked thereon (that is
to say):-
The object of this Invention is to construct a chimney pot that will
induce or create an up draught in the chimney to which it is applied in
whatever direction the wind may blow. The manner of attaining this
end is shewn in the accompanying Drawing, where Fig. 1 shews the
improved chimney pot in side elevation; Fig. 2 is a central vertical
section of the same; and Fig. 3 is a plan or top view. The pot consists
of an internal square tube A. of sheet metal, with parallel sides for the
greater part of its length, but terminating at bottom in a tapering
enlargement with a flanged foot a; this tube is surrounded for the
greater part of its length with a circular metal tube B of just sufficient
diameter at its upper part to receive the square tube, as shown in the
plan view, Fig. 3. The circular tube at the level at which the diameter
of the square tube commences to increase is also increased in diameter
by giving it a conical extension downwards for a short distance, or to
the line b, b, beyond which it terminates in the form of hooded
projections B that overhang the several inclined faces of the square
tube A. The inner and outer tubes are secured together by solder or
otherwise at the lines and points of contact, and four vertical air
channels C are thus formed within the chimney pot by the space enclosed
between the inner and outer tubes A, B.
From the foregoing explanation it will be understood that when the
pot is set up in place the wind from whatever direction it blows will
strike against the exposed or uncovered portion of one side of the square
tube A, and passing up under the hood that overlies the side or inclined
face presented thereto, as shewn by the arrows, it will be led upwards
and find an exit at the top of the chimney pot. The heat of the
struggling internal current of combustible gases will also assist this
upward action of the wind, and thus an efficient draught will be

page_text: maintained in the chimney, whatever may be the direction of the
wind.
Having now set forth the nature of my Invention of "An Improved
Construction of Chimney Pot," and explained the manner of carrying
the same into effect, I wish it to be understood that under the above in t
part recited Letters Patent I claim, the means above described with
reference to the Drawing for inducing an up draught in chimneys.
In witness whereof, I, the said Jesse Wheatley, have hereunto
set my hand and seal, the Nineteenth day of August, in
the year of our Lord One thousand eight hundred and sixty- 1
eight.
Witness,
J. W. MOFFATT,
66, Chancery Lane..
JESSE WHEATLEY. (L.S.)