Improvements in Chimney Pots.
Year: 1896

page_text: Date of Application, 19th Sept., 1896-Accepted, 14th Nov., 1896
Improvements in Chimney Pots.
I, MICHEL STRÜDEL, of Bühl, near Gebweiler, in the Province of Alsace,
German Empire, Mechanician, do hereby declare the nature of my invention and
in what manner the same is performed to be particularly described and ascertained
in and by the following statement:-
The present invention relates to chimney pots and consists in constructing the
same with lateral flaps or wings adapted to open and close automatically according
to the direction of the wind.
And in order to render the present specification more easily intelligible reference
is had to the accompanying drawing in which similar letters of reference denote
similar parts throughout the several views:
Fig. 1 is a side elevation and
Fig. 2 a vertical section through a chimney constructed according to the
present invention.
The cap or hood which is applied to the ordinary brick work chimney, is of the
ordinary construction exteriorly having a conical cap g and it may be fixed in the
chimney by means of a screw spindle c which passes through a cross piece a at
the lower part of the hood and is provided at its lower end with gripper wings 6 the
ends of which engage with, or enter slightly into the brickwork and tend to spread
further apart and engage more firmly in the brickwork when the nut of the screw
bolt is tightened against the cross piece a as will be evident from the drawing and
thus prevent the hood from being dislodged. The hood is advantageously
rectangular in horizontal section and provided with four side flaps or wings a
arranged in the direction of the four winds and adapted to open or close corre-
sponding openings in the hood, through which the smoke may escape. The spaces
at the sides of the flaps when the same are opened are closed by lateral angular
flaps or webs d' to preveut sideward draught. Each opposite pair of flaps d d are
coupled by thin rigid bars f pivoted thereto and of such length that when the flaps
are not moved by the wind the same will stand open to about the extent of
10 centimetres as shown at Figure 2. Thus the north and south flaps and those at
the east and west are coupled. The hinges of the flaps are covered by a protecting
strip i to retain the same in good condition. If there is no wind at all the smoke
can escape through the 10 centimetre opening described and under the cap g in
the ordinary manner. If on the other hand the wind is strong from any quarter,
it will close the flap d against which it presses and by means of the rods f open
the opposite flap correspondingly wider, thus drawing by suction the smoke through
the opening at opposite side to that against which the wing presses. Jf the wind
comes from above all the flaps will retain their normal position and the smoke will
escape underneath the same."
Having now particularly described and ascertained the nature of my invention
and in what manner the same is performed I declare that what I claim is :-
A 'hood for chimneys, characterised by the arrangement of horizontally hinged
flaps d having lateral side plates d¹ and protecting plates i for the hinges, said flaps
being arranged in the direction of the four winds as specified, a cap to said hood
and. rods f to couple the opposite flaps so that when one flap is closed by the

page_text: pressure of the wind the opposite one will be opened correspondingly wider
substantially as described.
Dated this 19th day of September 1896.
BOULT & WADE,
Agents for the Applicant..