Improvements in Chimney Cowls.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Chimney Cowls.
WILLIAM EDMUND Cox 23 Ashbrook Road Upper Holloway London N.
Plumber do hereby declare the nature of this invention to be as follows:-
My invention is constructed as follows with an outside straight pipe and an inside
straight pipe of smaller diameter having a fixed or movable double cone on top of
the small pipe inside of the outside pipe it is composed of iron or zinc and earthen-
ware and can be fixed in brickwork or on a chimney pot in the ordinary way.
Dated this 2nd day of November 1896.
WILLIAM EDMUND Cox 23 Ashbrook Road Upper Holloway London Plumber
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:-
My invention relates to improvements in or connected with chimney cowls or
ventilators and the like. In accordance with this invention means are provided
in connection with chimney pots by which down draught is prevented and the
annoyance and inconvenience so frequently experienced by smoke being forced
into the room by a downward current of air through the chimney are entirely
obviated.
My said invention can also be applied for the purpose of ventilating sewers,
houses, drains, and buildings. The means provided are simple in construction,
inexpensive to manufacture, and most effective in action, whilst when it is required
to sweep the chimney no obstruction is caused to the passage of the sweep's
brush, and in order that my invention may be fully understood I will now proceed to
describe same.
With reference to the accompanying drawing of which Figure 1 is a sectional
elevation, Figure 2 a side elevation of the exterior of the chimney cowl or ventilator,
aud Figure 3 a plan of same.
Now according to my invention I have attached to and placed around the
chimney pot (C) a cylinder or tube (A) of any suitable metal or material, slightly
larger in its internal diameter than the outside of the chimney pot (C), a cylinder
or tube (A) extends in an upward direction to a suitable height above the chimney
pot (C) to which chimney pot (C) the cylinder or tube (A) is connected by the
brackets (D) which holds the cylinder or tube (A) in position. In the said cylinder
or tube (A) I arrange and place a circular double cone (B) coming to a point
from the centre in an upward and downward direction for the purpose as aforesaid

page_text: of preventing any down draught and at the same time creating a strong upward
current which acts as a pump for the extraction of all smoke or foul gases.
The diameter of the said cone (13) is such that it is of sufficient size to cover the
diameter of the chimney pot (C) space being left around the centre of the cone (B)
inside the cylinder or tube (A) to permit of the upward passage of the smoke from
the chimney. The double cone (B) may be a fixture within the cylinder or tabe (A),
or it may be made to rise and fall on a sliding rod (F) attached to cone (B) and
guided by the three rods (E) as shewn on the drawing, if required to be moved for
cleaning purposes. The cowl or ventilator can be made any size or shape. The
cone (B) is raised above the top of the cylinder or tube (A) by the aid of the
-sweep's brush, and returns to its proper position as the brush descends.
Having now particularly described the nature of my said invention and in what
manner the same performs its work, I declare that what I claim is the improvement
in and relating to chimney cowls and ventilators as and for the purpose herein before
described and shewn on drawing.
The arrangement and construction of the cylinder or tube (A) around the top of
the chimney pot (C) with the double cone (B) therein, either fixed or portable, as
hereinbefore described and shewn.
Dated this 5th day of February 1897.
WILLIAM EDMUND COX.