Improvements in means for Preventing Down Draught in Flues, Chimneys, Ventilating Pipes, Lamp Ohimneys and the like.
Year: 1899

page_text: Date of Application, 9th Nov., 1899
Complete Specification Left, 9th Aug., 1900-Accepted, 15th Sept., 1900
PROVISIONAL SPECIFICATION.
Improvements in means for Preventing Down Draught in Flues,
Chimneys, Ventilating Pipes, Lamp Ohimneys and the like.
We, ALFRED ONION NEVILLE, of 247, Hammersmith Road, London, W.,
Clothier, and JAMES CARPENTER, of 102, High Road, Tooting, Gardener, do hereby
declare the nature of this invention to be as follows:-
This invention for improvements in means for preventing down draught, in
flues, chimneys, ventilating pipes, lamp chimneys and the like has for its object
to provide a simple means whereby the smoke of stoves due to down draught in
the flue or chimney is prevented in a very satisfactory and simple manner.
According to this invention as applied to an ordinary flue the upper end thereof
is instead of being provided with a cowl formed with a tapered or contracted end
and a short distance below the end portions are cut away and turned inwardly.
These cut away portions are of course inclined in an upward direction and act
as deflectors thus directing the current of air as it strikes down the flue outwardly
through the side openings. These openings are preferably about three in number
and arranged with the centre one ou the opposite side of the flue to the two others
the three deflectors being at different levels.
It will thus be seen that in the event of down draught occurring the air current
will be partially directed outwards by the upper deflector and will be practically
obviated altogether before the third and lowest deflector has been reached.
Instead of three deflectors any other number may of course be employed and
if desired the deflectors may be attached upon the interior of the flue instead of
being formed by the partially cut out portions.
In the case of chimneys the arrangement is practically the same but the
deflectors are formed by metal plates pivoted across the chimney and weighted
slightly so that they have a tendency to assume the requisite inclined position and
openings are formed in the side of the chimney adjacent.
By this arrangement the passage of a sweeps broom is permitted as it will push
the deflectors out of the way as it goes up. To further facilitate this the pivots
are arranged in V shapeu grooves so that the brush will force them to one side
and upwards thus giving more room for its passage. The operation of these
pivot deflectors is the same as with the fixed deflectors above described.
The flues and deflectors can be constructed in any suitable manner to suit special
requirements and can of course be made of any suitable materials.
This invention also acts to prevent down draught in ventilating pipes, sewer
ventilators, and in other circumstances where it is desired to prevent down draught
and in which it is possible to apply this invention.
This invention can also be applied to the chimneys or casings of gas and other
lamps for outdoor use, for preventing down draught.
Dated this 9th day of November. 1899.
GEO. H. RAYNER.
37, Chancery Lane, London.

page_text: Improvements in means for Preventing Down Draught in Flues,
Ohimneys, Ventilating Pipes, Lamp Chimneys and the like.
We, ALFRED ONION NEVILLE, Clothier, of 247, Hammersmith Road, London,
W., and JAMES CARPENTER, Gardener, of 102, High Road, Tooting, do hereby
declare the nature of this invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to means for preventing down draught in chimneys, ven-
tilating pipes and the like. and effects its object by means of a series of sloping
deflectors placed within the chimney or pipe and apertures by the side of these
deflectors.
The chimney or pipe is formed with two or more openings placed at opposite
sides and the deflectors are fitted immediately inside these openings in such a
manner that any down draught strikes the deflectors and is directed through the
openings instead of passing down the chimney. The deflectors may be fixed in
position or may be hinged and supported at the required angle, the latter
arrangement being specially intended for chimneys or flues to enable the soot to
be removed.
In order that this invention may be more clearly understood reference is had to
the accompanying sheet of drawings in which
Fig. is a vertical section of a chimney cowl constructed according to my
invention;
Fig. 2 is a sectional view on the linery Fig. 1 looking upwards; and
Figs. 3 and 4 are respectively a section and an elevation at right angles of a
chimney suitable for a gas stove.
Referring to Figs. 1 and 2 the stem A of the chimney cowl is provided with
the openings a placed at opposite sides opening the interior of the cowl to the
atmosphere. Immediately within these apertures the deflectors B are fitted
pivoted at b immediately below the apertures and resting upon the ledges a fitted
inside the cowl, these ledges extending upwardly at an angle to keep the deflectors
in the desired position.
To remove the soot from the deflectors we prefer to employ the vertical rod C
supported by the cross pieces c and having the small plate at its lower end. This
rod is prevented from dropping out by the pin which normally rests upon the
lower support and the rod C when struck by the brush or other implement is
raised and strikes the deflectors B shaking them and clearing off the accumulation
of soot. The upper end of the rod strikes against the small extension 6 upon the
top deflector and the pin engages with the bottom deflector when the rod is
raised.
It will he seen that any down draught strikes first upon the upper deflector and
the current of air is directed for the most part through the upper aperture a.
Any remaining down draught strikes upon the lower deflector and is directed
through the lower aperture so that it is practically stopped before descending into
the chimney. As the deflectors do not occupy the whole of the passage the ascend-
ing current of heated air and gases easily escapes.
In the arrangement shown in Figs. 3 and 4, the deflectors B' within the
chimney A are fixed behind the apertures, the arrangement however being other-
wise similar to that already described. The deflectors are shown as separately
fixed but may be stamped from the material of the chimney, the portion cut away
to form the apertures being bent back to the required angle.

page_text: The invention as applied to the other purposes mentioned is essentially similar
in construction to the arrangement shown in the drawings.
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) Means for preventing down draughts in chimneys and the like, consisting
of internal deflectors placed at an angle, and apertures in the walls immediately
above the lower sides of the deflectors which direct the down draught through
the apertures, substantially as herein described.
(2) Means for preventing down draught in chimneys in which hinged deflectors
and apertures are employed, constructed substantially as described and shown
in Figs. 1 and 2 of the accompanying drawings.
GEO. H. RAYNER.
37, Chancery Lane, London. Agent for the Applicants.