AN IMPROVED CONSTRUCTION OF CHIMNEY POT TO PREVENT DOWN DRAUGHTS
Year: 1885

page_text: We JOHN HORNE, Gentleman of Hallam Hall, Clevedon, and SAMUEL HOLLYMAN,
Painter and Decorator of Culmstock Cottage, Clevedon both in the County of
Somerset, do bereby declare the nature of our said invention for "AN IMPROVED
CONSTRUCTION OF CHIMNEY POT TO PREVENT DOWN DRAUGHTS" to be as follows:-
The object of this invention is to so construct chimney pots or tops that the
up draught in the chimney is improved and all draughts down the chimney
prevented.
For the purpose of our invention we form the upper cylindrical part of the pot
somewhat bulbous or pear shaped with the neck contracted and arranged to receive
a skeleton frame in metal which can be cemented in place.
The bulbous portion has a series of apertures.
· Above and to the skeleton frame we fit a kind of circular hood plain or corru-
gated with hollow branches or ribs leading from the interior vertical passage to the
outer air the hollow branches being curved downwards as is also the hood to serve
as a cover to the bulb and its perforations.
Between the hood and the bulb we arrange openings for the passage of smoke
from under the hood.
Cross bars of the skeleton frame serve as a stop to a sweeps brush and we
purpose making all the other part or parts of glazed earthenware to prevent
accumulation of soot and to allow of the rain and showers to keep the exterior
clean and bright.
H. GARDNER,
166, Fleet Street, London,
Agent for the said John Horne and
Samuel Hollyman.

page_text: Draughts.
We JOHN HORNE, Gentleman of Hallam Hall, Clevedon, and SAMUEL HOLLYMAN,
Painter and Decorator, of Culmstock Cottage, Clevedon, both in the County of
Somerset, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :—
The object of this invention, is to so construct chimney pots or tops, that the
up draught in the chimney is improved and all draughts down the chimney
prevented.
For the purpose of our invention, (which is represented on the annexed drawings)
we form the upper cylindrical part A (Figure 1) of the pot B somewhat bulbous,
or pear shape with the neck C, contracted and arranged to receive a skeleton
frame D in metal, which can be cemented in place.
The bulbous portion A has a series of apertures E, E. Above and to the
skeleton frame D we fit a-kind of circular hood F, plain or corrugated, with hollow
branches G, or ribs leading from the interior vertical passage H to the outer air,
the hollow branches being curved downwards, as is also the hood to serve as a
cover to the bulb and its perforations.
Between the hood and the bulb, we arrange openings I in the skeleton frame D
for the passage of smoke from under the hood.
Cross bars J at the lower part K (shown in Plan Figure 2) of the skeleton
frame D serve as a stop to a Sweep's brush, and we purpose making all the other
part, or parts of glazed earthenware to prevent accumulation of soot and to enable
the rain and showers to keep the exterior clean and bright.
Figure 3 is a perspective view of a chimney pot similar to that shown at
Figure 1, but having smaller apertures E. The arrows in full lines, represent the
passage of the air, those in broken lines, the passage of the smoke.
The umbrella shield F is an effectual cure for down draughts caused by wind
reflected from towers, higher parts of buildings, proximity of hills, &c.
We use circular counter sunk holes E, E, for compressing the wind as it enters.
from outside, so as to cause a rapid dispersion of the same inside the pot, and so
prevent it forming a descending column.
Figure 4 shows a chimney pot (constructed in earthenware glazed inside and out)
consisting of two parts, namely; the lower globe or bulbous part A. and the shield
which drops upon the top of the former and is fastened to it by mortar, cement, or
other fastenings and consists of a globular part, hollow, out of which four pipes,
spring preferably answering to the points of the compass. Thus, wind blowing
from the North enables the smoke to escape from the Eastern and Western divisions,
but especially through the pipe pointing to the South, and so on in the same manner
in other winds.
In Figure 5 a modification in which the pipes are omitted and a shield resting
on three, four, or more earthenware supports as shown, is employed.
The mouth is shaped to direct the wind from below, so as to prevent it from
descending the pot.

page_text: Figure 6 shows an adaptation of our invention to fit on an ordinary chimney
pot, the lower part of the shield surrounding the chimney pot, is fastened with
cement or mortar, or in any other suitable way.
Chimney pots constructed according to our invention, may be made in tin, iron,
zinc, or any other metal, but varied in size, and conformation to suit the taste or
position.
Figure 7 shows a modification suitable for construction in zinc.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is
1. In a chimney pot having an enlargement or chamber, the combination of an
umbrella like shield, with or without tubes and countersunk holes in said enlarge-
ment or chamber (substantially in the manner hereinbefore described and as shown
on the annexed drawings) for the purpose set forth.
2. The improved construction of chimney pot to prevent down draughts as
hereinbefore described and substantially as shown on the annexed drawings.
3. The arrangement of chimney top carrying a conical or similarly shaped shield
with or without tubes for the purpose of attachment to ordinary chimney pots
substantially as herein set forth and shown at Figure 6 of the annexed. drawings.
The 18th day of November 1885
H. GARDNER,
166, Fleet Street, London,
Agent for the said J. Horne and
S. Hollyman.