An Improved Chimney Pot, Cowl, or Ventilator.
Year: 1893

page_text: Date of Application, 13th Feb., 1893
Complete Specification Left, 13th Nov., 1893-Accepted, 16th Dec., 1893
PROVISIONAL SPECIFICATION.
An Improved Chimney Pot, Cowl, or Ventilator.
We, FRANK STOKES, and RICHMOND PINDER, trading as Stokes and Pinder
of 49 Upper Baker Street, Marylebone, Surveyors, and JOHN ASHER of
44 Devonshire Street, Lisson Grove, Marylebone, in the County of London,
Joiner, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to construct chimneys pots, cowls ventilators and
the like in such a manner as to prevent down draughts.
Now according to this invention we provide a suitable base for attaching the pot
cowl or ventilator to a chimney or other structure which base is formed conical at
its upper end. Outside the conical portion of the base are one or more frustums of
cones hereinafter called cones one above the other with a space between the base
and the lower cone and also between each cone. The cones are attached to each
other and to the base by spiral partitions which divide the space between base and
the cones into a number of spiral flues opening into the upper portion of the pot or
cowl the cones being preferably in the centre thereof.
The partitions are brought down below the bottoms of the cones so that the
wind blowing across the pot or cowl is deflected upwards through the flues in a
spiral direction and thus induces a current in the chimney stack shaft or building.
These chimney pots or cowls may be made of metal terra-cotta or other suitable
material.
Dated this 12th dow of Fohmuox 1902
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Chimney Pot, Cowl, or Ventilator.
We, FRANK STOKES, and RICHMOND PINDER, trading as Stokes and Pinder,
of 49 Upper Baker Street, Marylebone, Surveyors, and JOHN ASHER, of
44 Devonshire Street, Lisson Grove, Marylebone, in the County of London,
Joiner, 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 :-
The object of this invention is to construct chimney pots cowls ventilators and
the like in such a manner as to prevent down draughts.
Now according to this invention we provide a suitable base for attaching the pot
cowl or ventilator to a chimney or other structure which base is formed conical at
its upper end. Outside the conical portion of the base are one or more frustums of
cones hereinafter called cones one above the other with a space between the base
and the lower cone and also between each cone. The cones are attached to each
other and to the base by spiral partitions which divide the space between the base
and the cones into a number of spiral flues opening into the upper portion of the
pot or cowl the cones being preferably in the centre thereof.
The partitions are brought down below the bottoms of the cones so that the
wind blowing across the pot or cowl is deflected upwards through the flues in a
spiral direction and thus induces a current in the chimney stack shaft or building.
The chimney pots or cowls may be made of metal terra-cotta or other suitable
material.

page_text: And in order that our said invention may be fully understood we will proceed
to explain the same with reference to the accompanying sheet of drawings in
which:-
Figure 1 represents an elevation partly in section of a chimney cowl or ventilator
constructed according to this invention.
Figure 2 represents elevation of a cowl also constructed according to this inven-
tion but having two sets of spiral flues.
Figure 3 is a section of Figure 2.
The same letters denote the same parts in all the figures.
a is the base of the cowl formed with a flange as shewn to fit on to a chimney or
with any
other preparation to enable the same to be attached to a chimney venti-
lating shaft or building the upper end of the base a terminates in a frustum of a
cone b. Outside the cone 6 are one or more cones à to the outermost of which is
aattached the upper cylindrical portion d.
The cones care attached to each other and to the base b by spiral partitions f
preferably four in number and each partition preferably making one complete
convolution round the axis of the cowl.'
For the sake of clearness however the partitions are shewn in the drawing making.
half a turn only but to obtain the best result the partitions should be carried
completely round the cowl.
The spaces between the cones c c and also between the cone b and c is thus
divided into a series of spiral flues communicating with the interior of the cowl.
The partitions fare carried down below the bottom of the cones c so that the air
blowing across the cowl is deflected upwards through the spiral flues the ascending
current thus having a rotary motion imparted to it and a current is thereby
induced in the chimney stack shaft or building.
Chimney pots or cowls constructed according to this invention may be made of
metal terra-cotta or other suitable material.
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 :-
1. In chimney pots cowls and the like the combination of a base a terminating in
a cone 6 with one or more cones c the said cones being attached to cach other and
to the base by spiral partitions f all substantially as herein before specified and for
the purposes stated.
2. In a chimney pot or cowl constructed as hereinbefore specified forming the
space between the upper portion 6 of the base and the cones c into two or more
spiral flues by means of partitions f carried down below the bottom of the said
cones for the purpose stated.
3. The improved cowl chimney pot or ventilator consisting of a base a terminating
in a conical portion 6 one or more cones c connected to each other and to the base
by spiral partitions f carried down below the bottom of the cones c and a cylindrical
portion d attached to the cone call substantially as hereinbefore specified.
Dated this 13th day of November 1893.
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicants.