Year: 1886

page_text: Date of Application, 1st July, 1886.
Complete Left, 1st Feb., 1887.
Complete Accepted, 1st Mar., 1887
Merchant, do hereby declare the nature of my invention to be as follows :-
The object of this invention is the construction of an improved chimney pot whereby
any passing current of wind is effectually prevented blowing down the chimney and so
interfering with the outlet of smoke.
In performing my invention I employ by preference a cylindrical shaft which at its
upper extremity opens into an enlargement of spherical form and provided with an
outlet at the top, of about the same diameter as the mouth of the shaft and with side
passages or openings, the outlets of which are situated a little below the mouth of
the shaft.
Above the spherical chamber so formed, I arrange a series of circular louvres or
cones of gradually decreasing size and so arranged one above another that the smaller
diameter of each adjoining one extends upwards for a given distance inside the larger
diameter of the one above it until the top one is reached, the outlet of which is of the
same diameter as the two outlets before mentioned.
In practice I find that this construction of improved chimney pot serves to cause
the currents of wind passing over the top and which have a tendency to blow
downwards, to be deflected outwards by some of the louvres or cones, and the outside
of which latter are so formed as to tend to assist in withdrawing any wind which may
so enter the upper part of the chimney pot.
I find also that the spherical enlargement before mentioned prevents any back
pressure interfering with the outlet of the smoke, for if a back pressure sets up
instead of retarding the outlet of the smoke the same is simply allowed to gather in
the enlargement and finds a ready escape therefrom through the side outlets.
This improved chimney pot may be constructed of earthenware, netal or other
suitable materials.
JOHN G. WILSON,
Agent for the Applicant.

page_text: I JOHN BENNISON of 36 City Road, Manchester, in the County of Lancaster, Marble
Merchant, do hereby declare the nature of my 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 the construction of an improved chimney pot whereby
any passing current of wind is effectually prevented blowing down the chimney and
so interfering with the outlet of smoke.
On the accompanying drawing Fig. 1. is an exterior view and Fig. 2. a transverse
sectional view of my improved chimney pot.
In performing my invention I employ by preference a cylindrical shaft a. which at
its upper extremity opens into an enlargement b. of spherical form by preference and
provided with an outlet c. at the top, of about the same diameter as the mouth d. of
the shaft a. and with side passages or openings d', the outlets e. of which are situated
a little below the mouth of the shaft.
Above the spherical chamber so formed, I arrange a series of circular louvres or
cones of gradually decreasing size and so arranged one above the other that the
smaller circumference of each adjoining one extends upwards for a given distance
inside the larger circumference of the one above it until the top one is reached, the
outlet of which is of the same diameter as the two outlets before mentioned.
In practise I find that this construction of improved chimney pot serves to cause the
currents of wind passing over the top and which have a tendency to blow downwards
to be deflected outwards by some of the louvres or cones ff. and the outside of which
latter are so formed as illustrated to tend to assist in withdrawing any wind which
may enter the upper part of the chimney pot.
I find also that the spherical enlargement b. prevents any back pressure interfering
with the outlet of the smoke, for if a back pressure sets up, instead of retarding the
outlet of the smoke, the smoke is simply allowed to gather in the enlargement and
finds a ready escape therefrom through the side outlets d.
This improved chimney pot may be constructed of earthenware, metal or other
suitable materials.
Having thus particularly described and ascertained the nature of my invention
and in what manner the same is to be performed, I declare that what I claim is :-
In the construction of an improved chimney pot, the combination and arrangement
of the cylindrical shaft, spherical chamber and annular louvres or cones all mounted
and operating substantially as and for the purposes hereinbefore described and
illustrated on the accompanying drawing.
JOHN G. WILSON,
Agent for the Applicant.