IMPROVEMENT IN CHIMNEY TOPS OR 17753 1 7+ 15797
Year: 1882

page_text: I f
LETTERS PATENT to George Kent, a Retired Chief Engineer Royal Navy
of 332 Fratton Road Buckland in the Parish of Portsea and County, of
Southampton for an invention of "IMPROVEMENT IN CHIMNEY TOPS OR
17753
1 7+
15797
+
f
13.
PROVISIONAL SPECIFICATION left by the said George Kent at the Office
of the Commissioners of Patents on the 22nd March 1882.
:
..
GEORGE KENT a retired Chief Engineer Royal Navy of 332 Fratton Road
Buckland in the Parish of Portsea and County of Southampton IMPROVEMENT
OF CHIMNEY TOPS OR VENTILATORS FOR THE PREVENTION OF SMOKY CHIMNEYS
ܙܐ.
* .*
"
This Invention relates to an improved top or Ventilator for Chimneys or shafts with
the object of preventing down draught, of increasing the ventilating power by the
force of the wind and to render their action independent of the direction of the wind.
Our Invention consists of the application of a series of frustra of cones surrounded by
an envelope, guard, or casing, so placed that any draught caused by the action of
the wind shall be converted into a current upward or downward outside of the
central shaft of the Chimney or stack to which it may be applied. This improved
Chimney consists of, A taper tube in continuation of the ordinary Chimney or
Stack with an inverted frustrum of a cone fixed a little below the opening of "the
upper end thereof, combined with a series of Conical frustra closed in by a cap or
cover above so arranged as to admit of a free egress of the smoke and heated gases
passing up the Chimney the whole of these cones being surrounded by a casing,
cylindrical or other shaped, so as to prevent the direct action of the wind upon 'the
mouths or openings between the cones and still of sufficient distance to permit of
the free escape of all gases passing through the Chimney the lower end of this
casing being protected also by an inverted cone or disc. The Invention by means
of this arrangement prevents any return of smoke down the Chimney the lower or
inverted cone or cones in the event of any upward action of the wind giving an
outward and upward direction to the escaping gases and the cover or cap and the
upper cones giving a downward and outward direction' in any other case!!
'
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page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Kent in the Great Seal Patent Office on the 14th September
1882.
GEORGE KENT, a retired Chief Engineer Royal Navy, of 332 Fratton Road,
in the parish of Portsea county of Southampton IMPROVEMENT OF CHIMNEY
TOPS OR VENTILATORS FOR THE PREVENTION OF SMOKY CHIMNIES.
My Invention relates to an improved top or ventilator for chimnies or shafts,
with the object of preventing downdraughts of increasing the ventilating power by
the force of the wind and to render their action independant of the direction of the
wind. My Invention consists of the application of a series of frustra of cones
surrounded by an envelope, guard or casing, so placed that any draught caused by
the action of the wind shall be converted by this arrangement into a current
upward or downward outside of the central shaft of the chimney or stack to which
it may be applied-In order that my said Invention may be fully understood and
its nature particularly described and ascertained I shall now proceed to describe it,
refering to the annexed Sheet of Drawings, in which the same letters of referenco
indicate the corresponding parts in the several figures. Figure 1 of the annexed
drawings represents a side-elevation Figure 2. a vertical section on the line C D.
Figure
a plan for an ordinary flue of fourteen inches in length by nine inches
deliniated, one quarter the full sise. The material of which I propose to construct
these pots or ventilators may be sheet zinc, galvanized iron or any of the materials
used for this purpose. My Invention consists of a tapered tube in continuation of
the ordinary chimney or stack, as deliniated in annexed "Sheet of Drawings" and
marked A. thereon, with an inverted frustrum of a cone, fixed at a certain distance
below the upper end thereof; marked " in Figure 2 of annexed Sheet of
Drawings, combined with a series of conical frustra marked respectively "b"
and "c" in the annexed "Sheet of Drawings" closed in by a cap or cover;
marked "d." in the said Sheet, so arranged as to permit of a free egress of the
smoke and heated gasses passing up the chimney.
a
The whole of these conical frustra and the lower portion of the cap or cover,
being surrounded by a casing, marked B, in the annexed "Sheet of Drawings,'
which casing may be made cylindrical or other shaped so as to prevent the direct
action of the wind upon the mouths or openings between the outer edges of the
cones and still at a sufficient distance therefrom to permit of the free escape of all
gasses passing through the chimney; in exceptional cases, the lower end of this
casing may be protected by a disk or conical frustrum. The lower or inverted
frustrum is fitted to the tapered shaft and secured by being soldered thereto; the
upper frustra, the cap or cover and the casing are supported and held in position
by four equidistantly placed stays or distance picces as shewn in Figure 2 in
annexed "Sheet of Drawings" (marked s) these stays may be either soldered or
riveted solid or tubular.
My Invention, by means of the arrangement herein before described prevents
any down draught or return of smoke in the chimney; the lower or.inverted cone,
in the event of any upward action of the wind, giving an outward and upward
_direction to the escaping gasses, shewn by the arrows on the right-hand side of
Figure 2 in the annexed "Sheet of Drawings" and the cover or cap and the upper
conical frustra giving a downward and outward direction in any other case; as
shewn by the arrows on the left hand side of the same figure.
At the same time the upcast of the chimney is materially increased by the
induced outward current in all cases and its ventilating power thereby increased
independant of the direction of the wind.

page_text: Having thus particularly described and ascertained the nature of my Invention
and the manner in which it may be used or carried into effect, as well as having
deliniated it in the annexed "Sheet of Drawings "-I would observe, that what I
consider novel and original and therefore claim as the Invention secured to me by
the hereinbefore in part recited Letters Patent is,―
In the formation of chimney tops or ventilators the combination of a series of
conical frustra erect and inverted, a conical cap or cover to the same with a
protecting casing or envelope for them substancially in the manner and for the
purpose herein before described and ascertained and as deliniated in the annexed
"Sheet of Drawings.
In witness whereof I, the said George Kent, have to this my specification
set my hand and seal, this eleventh day of September, in the Year of
our Lord One thousand eight hundred and eighty two.
GEORGE KENT. (L.S.)