IMPROVEMENTS IN COMPOUND ATMOSPHERIC FUNNELS FOR THE ECONOMICAL PRODUCTION OF HEAT FROM FUEL AND FOR VENTILATING PURPOSES
Year: 1882

page_text: LETTERS PATENT to Eugène Wery of 38 Thurloe Place South Kensington
in the County of Middlesex for an Invention of IMPROVEMENTS IN COMPOUND
ATMOSPHERIC FUNNELS FOR THE ECONOMICAL PRODUCTION OF HEAT FROM
FUEL AND FOR VENTILATING PURPOSES A communication to him from
abroad by Georges Eugène Wery of 4 Rue Rude Paris in the Republic of
France.
PROVISIONAL SPECIFICATION left by the said Eugène Wery at the Office
of the Commissioners of Patents on the 23rd September 1882.
EUGENE WERY, of 38 Thurloe Place, South Kensington in the County of
Middlesex. "IMPROVEMENTS IN COMPOUND ATMOSPHERIC FUNNELS FOR THE
ECONOMICAL PRODUCTION OF HEAT FROM FUEL AND FOR VENTILATING PURPOSES.
(A communication to me from abroad by Georges Eugène Wery of 4 Rue Rude,'
Paris in the Republic of France
This Invention relates to an improved atmospheric funnel peculiarly constructed
and combined with a jacket surrounding the funnel and having at its lower part
one or several openings for the natural introduction of cold air between the said
jacket and the funnel. The jacket which partly closes upon the funnel at top
gives time to the cold air to get heated by the radiation of the heating surface of
the funnel so that hot air penetrating with force and velocity through spiral
apertures into the funnel proper imparts a rotary action to the gases in course of
evolution from the furnace below in order to retard their velocity towards the exit
of the funnel or stack, namely in the proportion existing between the diameter of
a circle to its circumference that is to say, allowing more time (about one third) for
the combination of carbon and oxygen at high temperature in the furnace than
with ordinary plain funnels or stacks, thus realising a great saving in fuel owing
to a greater percentage of Carbonic acid gas being produced.
For the purposes of this Invention I take a metal pipe (of thin gauge) parallel
throughout its length. Upon the internal surface of the said pipe I construct what
I may term the thread of a screw or blades in a spiral form which I commence by

page_text: a slight inward projection or indentation at the lower part of the pipe at a distance
of about 4 inches from its lower end.
The said screw thread (or blades) protrudes inside the said pipe increasing in
size upwards gradually in uniform proportions so as at the top to project toward
the centre of the funnel about one sixth of its diameter the pitch of said screw
threads or blades being about three diameters of the said pipe.
These screw threads (or blades) have two faces that is to say, one face (the shorter
of the two) pointing towards the centre of the funnel placed parallel to a line
drawn through the centre and forming a right angle with the other face, which on
the other hand is much wider than the former face. The internal edges or angle
of the screw threads (or blades) are set in number according to the diameter of
the funnel.
Further, at the angle where the blades or threads of the screws meet an aperture
is cut from place to place four inches long leaving only intervals sufficient to
maintain the rigidity of the spiral blades said apertures starting from the
bottom of the screw threads (or blades) are about one sixteenth of an inch wide
and increasing upwards gradually to one eighth of an inch at the top but the whole
area of such aperture or apertures shall not be in the aggregate more than 7 per
cent of the clear area of the diameter of the funnel measured at the top of the
screw threads or blades.
Similar horizontal apertures are made under the top cover of the said screw
threads or blades and upon their larger face only and other similar apertures are
made also between the top edge of the cone of the jacket and the funnel but not
behind the screw threads or spiral blades where all escape of hot air must be
prevented.
.
The upper part of the funnel is continuous with the upper edge of the cone of the
jacket above mentioned and is of the same diameter as the lower part in which are
fitted the screw threads or spiral blades and of a length not less than fifteen feet
so as to obtain good results of economy as well as consumption of smoke. Metal
guides also of spiral shape should be placed between the jacket and the funnel just
above the shortest blade of the screw thread following the spiral direction of the
same so as to increase the distance traversed by the air and give it time to absorb
heat from the surface of the heated metal of the funnel. Apertures are made
through the funnel proper behind the spiral blades or screw threads by cutting the
metal through leaving merely enough to secure rigidity in-order to ensure & constant
current of air from the jacket into the spiral blades or screw threads.
.
By these means the rotary action of the gases is maintained during the operation
of the furnace.
For ventilating purposes the construction and action of the funnel are practically
the same.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Eugène Wery in the Great Seal Patent Office on the 21st March 1883..
EUGENE WERY of 38 Thurloe Place, South Kensington in the County of
Middlesex "IMPROVEMENTS IN COMPOUND ATMOSPHERIC FUNNELS FOR THE
ECONOMICAL PRODUCTION OF HEAT FROM FUEL AND FOR VENTILATING PURPOSES
(Communicated to me from abroad by Georges Eugène Wery of 4 Rue Rude,
Paris in the Republic of France.)
•
"
This Invention relates to an improved atmospheric funnel peculiarly constructed
and combined with a jacket surrounding the funnel and having at its lower part
one or several openings for the natural introduction of cold air between the said
jacket and the funnel.
The jacket which partly closes upon the funnel at top gives time to the cold air
to get heated by the radiation of the heating surface of the funnel so that hot air
penetrating with force and velocity through spiral apertures into the funnel proper
imparts a rotatory action to the gases in course of evolution from the furnace below
in order to either retard or increase their velocity towards the exit of the funnel or
stack, namely in the proportion existing between the diameter of a circle and its
circumference, that is to say, allowing in the former case more time (where
necessary) for the combination of carbon and oxygen at high temperature in the
furnace than with ordinary plain funnels or stacks, thus realising a great saving
in fuel owing to a greater percentage of Carbonic acid gas being produced.
For the purposes of this Invention which I clearly show in sectional elevation
at Figure 1, and sectional plan at Figure 2, I take a metal pipe A (of thin gauge)
parallel throughout its length. Upon the internal surface of the said pipe I
construct what I may term the thread of a screw, or blades B, B, in a spiral form
which I commence by a slight inward projection or indentation C at the lower
part of the pipe at a distance of about four inches from its lower end.
The said screw threads (or blades) B B protrude inside the said pipe A increasing
in size upwards gradually in uniform proportions so as at the top D to project
toward the centre of the funnel about one sixth of its diameter, the pitch of said
screw threads or blades B B being about three diameters of the said pipe.
These screw threads (or blades) B B have two faces E F that is to say, one
face E (the shorter of the two) pointing towards the centre of the funnel placed
parallel to a line drawn through the centre and forming a right angle with the
other face F which on the other hand is much wider than the former face.
The internal edges or angles of the screw threads (or blades) are set in number
according to the diameter of the funnel. Further; at the angle where the blades
or threads of the screws meet an aperture G is cut from place to place four inches
long leaving only intervals sufficient to maintain the rigidity of the spiral blades,
said apertures starting irom the bottom of the screw threads (or blades) are about
one sixteenth of an inch wide and increase upwards gradually to one eighth of an
inch at the top, but the whole area of such aperture or apertures is not in the
aggregate more than seven per cent of the clear area of the diameter of the funnel
measured at the top of the screw threads or blades. Similar apertures are made
also between the top edge of the cone I of the jacket J and the funnel A but not
behind the screw threads or spiral blades B B where all escape of air must be
prevented.
The upper part of the funnel A is continuous with the upper edge of the cone of
the jacket above mentioned and is at K of the same diameter as the lower part L
in which are fitted the screw threads or spiral blades and of a length not less than

page_text: fifteen feet so as to obtain good results of economy as well as consumption of
smoke.
Metal guides M. M. also of spiral shape are placed between the jacket J and the
funnel A just above the shortest blade of the screw thread following the spiral
direction of the same so as to increase the distance traversed by the air and give it
time to absorb heat from the surface of the heated metal of the funnel.
Apertures may be made through the funnel proper behind the spiral blades or
screw threads by cutting the metal through leaving merely enough to secure
rigidity in order to ensure a constant current of air through the openings N N at
the lower part of the jacket into the spiral blades or screw threads. By these
means the rotatory action of the gases is maintained during the operation of the
furnace.
For ventilating purposes the construction and action of the funnel are practically
the same but for some special purposes the spiral may be reversed the broad end
being placed at the bottom but all other details being the same.
Figure 3 is a sectional elevation of a similar funnel but capable of being raised
and lowered to decrease or increase the space between the top edge of it and that
of the cone I to stop the passage of air through from the jacket to the interior of
the funnel A and so increase the rotatory action, or to lower it to determine
the quantity of air passing through, or to stop its passage through said space
entirely and so increase the rotatory action. This raising and lowering is effected
by the parbuckle P, Figure 4, which can be turned to cause the funnel A. to ride
. up or down the inclines Q formed on the base plate R; the turning of the
parbuckle P drawing or pushing the funnel round accordingly to suit the closing or
opening operation.
This modified construction or arrangement of funnel has an extra outer jacket S
closed at the bottom but provided with perforations T near the top for the passage
of air to the space between itself and the jacket J; this being partially suspended
from the cone I and partially by supports at the lower part, a clearance being
otherwise left at the lower part for the air which has become heated in the space U
to pass under the edge V into the space W to feed the spiral blades B B of the
funnel. These spiral blades are identical with those described with reference to
Figures 1 and 2.
Having now described the nature of the said Invention and in what manner the
same is to be performed I declare that I claim :
The construction of funnels A with internal spiral blades B B of increasing or
decreasing area upwards constructed and arranged in the manner set forth, and
surrounded by one or more jackets J, S, as described for the purposes explained
also means of regulating the draught by controlling the admission of air into the
funnel substantially as described.
In witness whereof I the said Eugène Wery have hereunto set my hand and
seal this thirteenth day of March in the year of our Lord One thousand
eight hundred and eighty three.
Signed sealed and delivered by the above
named Eugène Wery in the presence of
H. MULLINGER
38, Avenue Friedland,
Paris.
-
Coachman.
EUGENE WERY (L.S.)