An Improved Chimney Cowl.
Year: 1896

page_text: ROVISIONAL
тот
An Improved Chimney Cowl.
We, WILLIAM HENRY BROWN, of The Cliff, Ipswich, in the County of Suffolk,
Architect and Surveyor, and JAMES GODDARD DRUNNING of the Cliff Building
Yard, Ipswich, aforesaid, Builders' Foreman, do hereby declare the nature of our
said invention to be as follows:-
The object of our invention is to construct an improved form of cowl for
chimneys and flues, by the use of which smoky chimnies will be more effectually
cured than hitherto.
According to our invention we construct the cowl so that it may turn upon its
centre by the action of the wind operating upon a suitable vane, as usual; but
instead of closing the back or windward end of the cowl, we fit therein or thereto
a conical tube, or frustum of a cone, open throughout, the largest end being towards
the current of air, and the smallest end extending, inside the cowl, to about, the
centre of the flue, and towards the open end of the cowl.
The effect of this arrangement is that the wind, travelling through the conical
tube, causes an induced current upwards in the flue and outwards from the cowl,
effectually securing an upward draught and preventing the possibility of a
downdraught.
A flange is fitted round the upper edge of the chimney pot or flue, to check any
draught which might otherwise arise between the foot of the cowl and the flue.
Dated 22nd October 1896.
GEO.
DOWNING,
8 Quality Court, London W.C., Agent.
We, WILLIAM HENRY BROWN, of The Cliff, Ipswich, in the County of Suffolk,
Architect and Surveyor, and JAMES GODDARD BRUNNING of the Cliff Building
Yard, Ipswich aforesaid, Builders' Foreman, 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:-
The object of our invention is to construct an improved form of cowl for
chimneys and flues, by the use of which smoky chimneys will be more effectually
cured than hitherto.
According to our invention we construct the cowl so that it may turn upon its
centre by the action of wind operating upon a suitable vane, as usual; but instead
of closing me back or windward end of the cowl, we fit therein or thereto a conical

page_text: tube, or frustum of a cone, open throughout, the largest end being towards the
current of air, and the smallest end, extending, inside the cowl, to about the centre
of the flue, and towards the open end of the cowl. The effect of this arrangement
is that the wind, travelling through, the conical tube, causes an induced current
upwards in the flue and outwards from the cowl, effectually securing an upward
draught and preventing the possibility of a downdraught.
A flange is fitted round the upper edge of the chimney pot or flue, to check any
draught which might otherwise arise between the foot of the cowl and the flue.
And in order that our said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which
similar letters of reference indicate corresponding parts.
Fig. 1 is an elevation and Fig. 2 a section of our invention.
a is the top of an ordinary chimney or flue, is the cowl having an ordinary
wind vane c secured thereto. d is a conical tube, open throughout, the largest end
being secured to the cowl and always retained towards the current of air by means
of the wind acting upon the vane. e is a pin upon which the cowl revolves, the
pin working in a socket f attached to a cross-bar g, integral with a collar fixed
to the top of the flue. k is a flange fitted to the flue, as shown, to check the inflow
of air between the hood of the cowl and the flue.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we, declare that what
we claim is:-
:
1. The improved construction of chimney cowls substantially as specified.
2. The combination, with a chimney top or flue, of a cowl b capable of rotating
upon a vertical axis by means of a wind' vane: an open ended tube d, in the form
of a frustum of a cone, fixed to the cowl; and an annular flange k, substantially as
and for the purposes herein before described and illustrated by the drawings.
Dated 5th July 1897.
GEO.
DOWNING,
8 Quality Court, London W.C., Agent.