An Improved Chimney Cowl.
Year: 1894

page_text: PROVISIONAL SPECIFICATION.
An Improved Chimney Cowl.
I, EDWARD PEARSON of 26 Mehatable Road, Hackney, Gentleman, do hereby
declare the nature of this invention, to be as follows:-
My invention relates to an improved ventilating cowl for chimneys, which has for
its object to more effectually prevent down-draughts and smoky chimneys, and
also to afford the requisite facility for the passage of the sweeps brush through the
cowl in the operation of cleaning the chimney.
My improved ventilating cowl is mounted to rotate upon roller bearings external
of the chimney top or fixed base of the cowl, without the use of any internal spindle
and bearing as commonly used, which forms an obstacle to the passage of the
brush, and so prevents the cleaning of the cowl. This revolving part or head of
the cowl comprises the upright or body portion, and a nearly horizontal tubular
portion extending from the body portion in a slightly upwardly inclined direction.
This portion of the cowl is of considerable length relatively to its diameter,
and may be provided with a vane so that the exit mouth will always be presented
away from the wind.
It has an aperture for the admission of air which is always
presented directly towards the wind, and it has an internal longitudinal deflector or
partition by which it is divided for a portion of its length into separate passages for
the smoke and air the latter mingling with the former at the exit end, and thereby
producing an exhaustive effect by which the draught in the chimney is promoted.
The horizontal tubular and body portions of the cowl are connected by an easy bend
which allows of the passage of the brush without difficulty, the opening for the
admission of the air current being in the outer curve of the bend which is always
presented directly towards the wind.
Dated this 28th day of November 1894.
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.
I, EDWARD PEARSON, of 26, Mehatable Road, Hackney, Gentleman, 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 an improved ventilating cowl for chimneys, which has
for its object to more effectually prevent down-draughts and to cure smoky
chimneys, the cowl being specially constructed to afford the requisite facility for
the passage of the sweep's brush completely through the cowl in the operation of
cleaning the chimney.
My improved ventilating cowl is illustrated in the accompanying drawings,
forming part of this Specification, wherein
Figure 1 is a central longitudinal vertical section of the cowl

page_text: Figure 2 is a rear end elevation and Figure 3 a cross-section on line 1-1
Figure 1.
The same letters of reference indicate the same parts in all the figures.
The revolving part or head of the cowl comprises the upright or body portion A
and a nearly horizontal tubular portion B in one therewith and extending from the
body portion in a slightly upwardly inclined direction. The body portion A is
mounted to rotate about the chimney top or fixed base C of the cowl, without
the use of any internal spindle and bearing which, as commonly used, forms an
obstacle to the passage of the brush and so prevents the cleaning of the cowl.
With this object the body part is supported on rollers c mounted on the sides of
the fixed base C and has horizontal roliers a mounted in apertures in its side which
bear against the part C and take the overhanging strain. The portion B of
the cowl is of considerable length relatively to its diameter and is provided with a
vane so that the exit mouth will always be presented away from the wind, whilst
its opposite end, which is always presented directly towards the wind, is open for
the admission of air which, in passing through the part B, mingles with the smoke
and exerts an inductive action thereby producing an exhaustive effect by which
the draught in the chimney is promoted. The portions A and B of the cowl are
connected by an easy bend formed by a deflector D which allows of the passage of
the brush without difficulty, the opening for the admission of the air current
being over the curve of the bend which is always presented directly towards the
wind. Around the rear end of the main tubular part B there are fixed three air
pockets E which also present their open mouths directly to the wind, these pockets
being preferably curved in cross-section, tapering in the direction of their length,
and leading to apertures em the part B for the inlet of air to supplement the
action of that admitted over the deflector D. The front end of the part B may
be provided with a series of conical deflector rings F between which the wind
may enter in the form of inwardly directed converging curients by which the exit
of the smoke is facilitated.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declarc that what I
claim is :-
The herein described ventilating conl constructed with air inlets arranged
substantially as described and mounted to revolve upon external roller bearings,
substantially as specified.
Dated A nanet 51+1, 100
EDWARD PEARSON.