IMPROVEMENTS IN CHIMNEY TOPS AND VENTILATORS
Year: 1886

page_text: Date of Application, 19th Nov., 1886.
Complete Left, 28th Dec., 1886.
Complete Accepted, 28th Jan., 1887.
We, WILLIAM GEORGE SUDBURY Ironmonger and WILLIAM SPREADBUREY Fitter,
both of New Malden in the County of Surrey do hereby declare the nature of our
invention for IMPROVEMENTS IN CHIMNEY TOPS AND VENTILATORS to be as follows:-
Our invention consists in constructing Chimney Tops and Ventilators, with a Spiral
Flange on their inside, or a Spiral inward bulge on their outside, so that the escape.
of smoke and vitiated gases is assisted by a constant spiral up current, thereby
preventing down draughts.
The Flange on the inside of the Chimney Top, starts from the base and ascends in a
spiral shape to the Top, and stands out only sufficient to create, the spiral up current,
but not sufficient to obstruct the Sweep's Brush which can operate in a precisely
similar manner as in an ordinary plain Chimney Top.
The inward bulge on the outside of the Chimney Top starts from the base, and also
ascends in a spiral shape to the Top.
The Ventilator which may be of like formation to either of the two Forms of the
Chimney Top before mentioned, produces a spiral up draught thereby assisting the
escape of foul and unhealthy gases.
Sometimes we fix an ornamental Top to both Chimney Top and Ventilator.
The said Chimney Top and Ventilator may be made in any suitable material.
JOHN P. O'DONNELL,
Cambridge Villa, Cambridge Road,
New Malden, Surrey,
Agent for the said Applicants.

page_text: Improvements in Chimney Tops and Ventilators.
We, WILLIAM GEORGE SUDBURY, Ironmonger and WILLIAM SPREADBUREY, Fitter,
both of New Malden in the County of Surrey 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 :-
Our invention consists in constructing Chimney Tops and Ventilators with internal
Flanges or external inward bulges; or both so that the escape of smoke and vitiated
gases, may be assisted by a constant Spiral up current thereby preventing down
draughts.
The internal Flanges start from the base, and ascend in a spiral form to the Top,
and stand out only sufficient to create the spiral up current, but not sufficient to
obstruct the Sweep's Brush which can operate in a precisely similar manner as in an
ordinary plain Chimney Top. This form of our Chimney Top and Ventilator obviates
the necessity of external wind to assist the escape of smoke and gases.
Tho external inward bulges, also start from the base, and ascend in a Spiral Form
to the Top. The Bulges, approaching nearer to the centre of the Chimney Top and
Ventilator than the circumference, practically act as internal Flanges, so that smoke
and gases are assisted by a constant spiral up current on the inside and a spiral up
current on the outside.
In order that our said invention may be readily understood and carried into effect,
we will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section of that form of our invention which is constructed
with interval Flanges only.
Figure 2 is a plan on Top of Figure 1.
Figure 3 is an elevation of that form of our invention which is constructed with
external inward Bulges.
Figure 4 is a plan on Top of Figure 3, the top E being removed.
Figure 5 is a vertical section of Figure 3, the top E being removed.
Figure 6 shews one of the many easily devisable forms of ornamental Tops that
may be added when necessary to our Chimney Top and Ventilator.
In Figure 1 as described the Flanges A, A' ascend from the base B in a Spiral
form to the Top D.
It will be observed on reference to Figures 2 and 4 that sufficient space is allowed
in the centre of our Chimney Top and Ventilator for the free and easy passage of the
Sweep's Brush.
We have shewn on the accompanying Drawings as aforesaid a simple and perfectly
plain form of this our improved Chimney Top and Ventilator but it is sufficiently
obvious at the same time that we do in no wise limit ourselves to the form or to the
outward shape of the said Chimney Top and Ventilator or of the several flanges and
bulges thereof; or to the methods and details of constructing and fitting the same, for

page_text: cach Chimney Top and Ventilator can be made of such a form and shape and so
ornamented or otherwise treated, and the parts of the said Chimney Top and Ventilator
can be constructed and fitted in such a manner as may be found convenient or
desirable or suitable to any particular case and for any purposes of ventilation
whatever.
The said Chimney Top and Ventilator may be made in any suitable material.
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
1st. In Chimney Tops and in any form of Ventilators whatever; the internal
Flanges, arranged substantially for the purposes herein described and as shewn in
Figure 1.
2nd. In Chimney Tops and in any form of Ventilators whatever, the external inward
Bulges, arranged substantially, for the purposes herein described and as shewn in
Figures 3 and 5.
3rd. In Chimney Tops and Ventilators the combination of either of the Forms of
the Tops E and H with either of the forms of our invention as represented in
Figures 1 and 3.
JOHN P. O'DONNELL,
Cambridge Villa, Cambridge Road,
New Malden, Surrey,
Agent for the said Applicants.