Improvements in Chimney-pots and in Apparatus connected therewith.
Year: 1889

page_text: Date of Application, 6th Dec., 1889
Complete Specification Left, 2nd Aug., 1890-Accepted, 4th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Chimney-pots and in Apparatus connected
therewith.
We, THOMAS MANN of 9 Church Street, Bricklayer, and JOHN MANN of 8 Merrick
Street, Bricklayer, both of Bolton in the County of Lancaster, do hereby declare the
nature of our said invention to be as follows:-
This invention relates to the construction of chimney pots and in apparatus connected
there with and has for its object that of preventing or minimising the nuisance arising
from smoky chimneys caused by down-draught. This we accomplish by providing
the sides of the upper portion of the chimney pot with openings or outlets for smoke.
The said openings or outlets are provided with hinged covers of suitable materials.
Each cover is connected to the one opposite by metallic rods in such a manner that
when at rest each opening or outlet is partly open. In case a strong wind is blowing
the hinged covers on the wind side of the chimney pot are closed by the pressure of
the same, and those on the opposite side they are connected to are opened sufficiently
wide to allow of the exit of smoke. The chimney pot is provided with a closed top,
fast or otherwise.
D
1
1000
EDMUND CHADWICK,
Agent.
COMPLETE SPECIFICATION.
Improvements in Chimney-pots and in Apparatus connected
therewith.
We, THOMAS MANN of 9 Church Street, Bricklayer, and JOHN MANN of 8 Merrick
Street, Bricklayer, both of Bolton in the County of Lancaster, do hereby declare
the nature of our said 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 the construction of chimney pots and in apparatus
connected therewith and has for its object that of preventing or minimising the
nuisance arising from smoky chimneys caused by down-draught. This we accomplish
by providing the sides of the upper portion of the chimney pot with openings or
outlets for smoke. The said openings or outlets are provided with hinged covers of
suitable materials. Each cover is connected to the one opposite by metallic rods in
such a manner that when at rest each opening or outlet is partly open. In case a
strong wind
blowing the hinged covers on the wind side of the chimney pot are
closed by the pressure of the same, and those on the opposite they are connected to
are opened sufficiently wide to allow of the exit of smoke. The chimney pot is
provided with a closed top, fast or otherwise.
DESCRIPTION OF DRAWINGS.

page_text: Fig. 6 is a part outside elevation of our invention applied to a square chimney
pot, and
Fig. 7 is a sectional plan through line C¹ D' in Fig. 6.
is
In all the figures the same letters are employed to indicate corresponding parts.
A is the chimney pot; B the openings or outlets for smoke; C the hinged covers;
D the connecting rods, and J the cap or cover to form a closed top. The upper end
of the chimney pot is provided with the lugs E to which are pivoted the hinged
covers by the pins or centres G. The inner side of each hinged cover
provided with the lug H to connect same with the opposite cover by means of the
connecting rod D. The rods D are placed so as to cross each other without contact.
The object of this invention is to prevent or minimise the nuisance arising from
smoky chimneys caused by down-draught, which is effected automatically by wind
pressure. When the latter operates sufficiently to close one of the hinged covers C
to the opening or outlet B as in Figs. 1, 2, 3, 5, 6, and 7 the one it is connected to
is opened sufficiently wide to allow of smoke being emitted through the opening or
outlet B it is fitted to work in conjunction with. In case of light wind pressure the
inged covers C are only partly closed; the amount of opening being determined by
.he former. In case wind pressure is nil the covers C, when hinged on the upper
side, will be at rest as shown in Fig. 4, thus leaving the openings or outlets B partly
open. The hinged covers are fitted with the india-rubber or other analogous
buffers I to minimise the noise caused by the flapping or closing of the covers
against the sides of the chimney pot.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
In combination with a chimney pot the use of the hinged covers C and the
connecting rods D for the purpose specified substantially as described.
Dated the 27th August 1890.
EDMUND CHADWICK,
Agent.