Improvements in Chimney Pots.
Year: 1897

page_text: PROVIDIONAL
Improvements in Chimney Pots.
I, WILLIAM SMITII, of 139A North End, Croydon, in the County of Surrey,
Builder, do hereby declare the nature of this invention to be as follows:--
At or near the top of the chimney pot I form it with an angular extension for
the purpose of causing any descending wind impinging upon the lower of the
two angular inner faces of the extensions to be deflected therefrom in an upward
direction and thus prevent what is called downdraught. I may also provide
In some cases I. provide
another such angular extension immediately below it.
at the bottom of the extension a narrow lip projecting upward in a slanting
direction and intended to prevent a heavy gust of wind from being partly pro-
jected down below the extension or extensions.
.
CL
1907
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents..
Improvements in Chimney Pots.
I, WILLIAM SMITII, of 83. London Road, but late of 139A North End, Croydon,
in the County of Surrey, Builder, 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; -
My invention relates to improvements in chimney pots and has for objects to
prevent what is called down draught and to improve the draught.
Figure 1 of the accompanying sheet of drawings illustrates in sectional elevation
the simplest form of chimney pot constructed according to my invention.
Figures 2 to 10 inclusive are similar views of modified forms of construction.
Referring more particularly to Figure 1 it will be seen that at or near the top
of the chimney pot I form it with an angular extension that is to say, at the top of
the chimney pot the walls thereof are made partly conical for a short distance
as at a and also in the form of part of an inverted cone as at b. The object of
making the upper part of the chimney in this fashion is to cause any descending
wind which would impinge upon the angular inner wall or faces b of the extension
to be deflected therefrom in an upward direction and the wind which impinges
on the outside of the wall or faces a will be deflected upwards and so by inducing
the column of air or products of combustion produce a better draught than
would be obtained with a chimney pot of ordinary construction. It is therefor.

page_text: evident that the down-draught will be obviated or at least greatly prevented by
means of the wall or faces 6 and the updraught upwards considerably improved
by reason of the action of the wind on the outside of the wall or faces a.
I may also as shown in Figure 2 provide another such angular extension a¹ b¹
immediately below the said extension a b.
In some cases I provide at the bottom of the wall or faces b a narrow lip cas
shown in Figure 3 projecting upwards in a slanting direction which is intended
to still further minimise the downdraught by preventing the wind as much as
possible from passing below the extension a b.
Figure 4 is the same as described with reference to Figure 2 except that it
is provided with the lip c.
Figure 5 is the same as described with reference to Figure 4 except that there
is an additional lip c¹.
Figure 6 is the same as Figure 1 except that there is a vertical or approximately
vertical extension d above the angular wall or faces a and with the same exception
Figure 7 is like Figure 2. Figure 8 is like Figure 3, Figure 9 is like Figure 4
and Figure 10 is like Figure 5.
The chimney pots and their angular faces a b or a¹ bor both extensions d
and lips may be made of any suitable cross section to conform with require-
ments and it is evident that they may be made of metal earthenware or the like. 2
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is:
1. A chimney pot provided with an extension having slanting walls or faces a
and substantially as described and shown.
2. A chimney pot provided with an extension or extensions each of which has
slanting walls or faces substantially as described and shown.
3. A chimney pot provided with an extension or extensions one or more of
which has or have slanting walls or faces and a projecting lip or lips c substan-
tially as described and shown.
4. The constructions of Chimney pots shown on the drawings.
Dated this Ninth day of November 1897.
2
3
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.