Improvements in and connected with Chimney Pots.
Year: 1896

page_text: Date of Application, 12th Sept., 1896-Accepted, 17th Oct., 1896
COMPLETE SPECIFICATION.
Improvements in and connected with Chimney Pots.
J, STEPHEN JOHN CAIRNS, of 76 Kew Road, Birkdale, Southport, in the
County of Lancaster, Gardener, 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 :-
This invention relates to improvements in and connected with chimney pots, the
object being to provide means whereby a constant current of air is created and
caused to ascend the chimney and thereby the smoke prevented from descending
and entering rooms.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is an elevation, Fig. 2 a plan and Fig. 3 a longitudinal section of my
improved chimney pot.
Fig. 4 shows the same at a reduced scale applied to a building and
Fig. 5 is a longitudinal section of a modification of my invention.
In carrying out my invention and referring to Figs. 1, 2 & 3, my improved
chimney pot consists of a pipe a slightly conical and having a coned upper end a¹,
surrounded by louvres b, b, the mouth of which coned end projects above the
upper louvre 6 sufficiently to prevent the air which passes through the louvres
entering the pipe a and impeding the up current.
Inside the pipe a I form a long windledge or deflector c extending from near the
bottom to near the top of the said pipe. In the side of the pipe a from which the
said windledge or deflector springs, I form openings d, d', the upper ones having
small inwardly projecting windledges e, which deflector and windledges c & e serve
to guide the air current passing through the openings d, d' upwards, whilst the
latter permit the down current of air to escape before entering the chimney.
In order to render the current of air existing in rooms more effective as up
current in the chimney I fix my improved chimney pot in such a manner, that the
openings d, d', are on the same side as the front of the fireplace f, see Fig. 4,
which produces a better suction than would be the case when fixed at a right
angle thereto.
In very bad cases of smoky chimneys I employ an additional deflector or wind-
ledge in connection with openings d2 in the stack g of the chimney. Such
deflector or windledge c¹ I preferably form on a frame and the opening d³ by
means of air bricks.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim, is-
1st. A chimney pot having a pipe a with conical upper end a¹ surrounded by
louvres b, 6' the mouth of which conical end extends a distance above the upper
louvre b', all substantially as and for the purpose set forth.
2nd. A chimney pot constructed as specified in the preceding claim, having
deflectors or windledges c & e and openings d, d', respectively, the deflector or
windledge e reaching from near the bottom to near the top of the pipe a, all
substantially as aud for the purpose set forth.

page_text: 3rd. A chimney pot constructed as specified in the preceding claims, so fixed that
the openings d, d, in the pipe a are on the same side as the front of the fire place,
all substantially as and for the purpose set forth.
4th. The combination of a chimney pot constructed and fixed as specified in the
preceding claims with a chimney stack having a deflector or windledge c' in
connection with openings d, all substantially as and for the purpose set forth.
Dated this 11th day of September 1896.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.