IMPROVEMENTS IN APPARATUS FOR HEATING AIR TO A HIGH TEMPERATURE FOR USE IN FUR- NACES AND FOR OTHER PURPOSES
Year: 1872

page_text: LETTERS PATENT to Benjamin Joseph Barnard Mills, of the Firm
of Harris and Mills, of 85, Southampton Buildings, in the County
of Middlesex, Patent Agent, for the Invention of "IMPROVEMENTS IN
APPARATUS FOR HEATING AIR TO A HIGH TEMPERATURE FOR USE IN FUR-
NACES AND FOR OTHER PURPOSES."-A Ccommunication from abroad by
Dieudonné Demeure, residing at Chatelet, in the Kingdom of
Belgium.
Sealed the 5th November 1872, and dated the 6th May 1872.
PROVISIONAL SPECIFICATION left by the said Benjamin Joseph
Barnard Mills at the Office of the Commissioners of Patents, with
his Petition, on the 6th May 1872.
I, BENJAMIN JOSEPH BARNARD MILLS, of the Firm of Harris and
Mills, of 85, Southampton Buildings, in the County of Middlesex,
Patent Agent, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN APPARATUS FOR HEATING ATR TO A HIGH TEMPERATURE FOR
USE IN FURNACES AND FOR OTHER PURPOSES," a communication to me from
abroad by Dieudonné Demeure, residing at Chatelet, in the Kingdom of
Belgium, to be as follows:-
The Invention consists in a novel combination of horizontal tubes
connected together by syphon tubes in such a way as to form an appa-

page_text: ratus with multitudinous circulation for heating air to a high tempera-
ture. The horizontal tubes are arranged on each side of a furnace. The
air enters at the end of the first tube, and passes through the syphon
tubes connected therewith to a second horizontal tube on the other side
of the furnace. To this second tube another series of syplion tubes are
connected, which syphon.tubes are also connected to a third horizontal.
tube lying alongside of the first horizontal tube, and extending from end
to end of the furnace. The air passes along this third tube through
other syphon tubes across the furnace to a fourth horizontal tube, whenco
it passes by other syphon tubes connected thereto to a fifth horizontal
tube, from which it issues to the tuyère of a furnace, or to other desired
destination..
In the arrangement described, the first, second, fourth, and fifth hori-
zontal tubes extend each only about half the length of the furnace,
whilst the third tube extends from end to end thereof, and the second,
third, and fourth tubes are closed at both ends, whilst the first and fifth
tubes are closed only at their inner ends, their outer ends being con-
nected, the one to the source of supply of cold air, the other to a tuyère
or to a tube or passage conducting the heated air to any desired place..
.
The first, third, and fifth tubes are by preference cast in two pieces,
each being again divided into two longitudinally by a division also cast
therein.
I
If desired other numbers of horizontal tubes and of syphon tubes may
SPECIFICATION in pursuance of the conditions of the Letters Patent, 25
filed by the said Benjamin Joseph Barnard Mills in the Great Seal
Patent Office on the 6th November 1872.
:
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
JOSEPH BARNARD MILLS, of the Firm of Harris and Mills, of 35,
Southampton Buildings, in the County of Middlesex, Patent Agent, 30
send greeting.
་
WHEREAS Her most Excellent Majesty Queen Victória, by Her
Letters Patent, bearing date the Sixth day of May, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
"

page_text: an
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Benjamin Joseph Barnard Mills, Her special
license that I, the said Benjamin Joseph Barnard Mills, my executors,
administrators, and assigns, or such others as I, the said Benjamin
Joseph Barnard Mills, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of
Great Britain and Ireland, the Ohannel Islands, and Isle of Man,
) Invention for "IMPROVEMENTS IN APPARATUS FOR HEATING AIR TO A HIGH
TEMPERATURE FOR USE IN FURNACES AND FOR OTHER PURPOSES," a communica-
tion to me from abroad by Dieudonné Demeure, residing at Chatelet,
in the Kingdom of Belgium, upon the condition (amongst others) that
I, the said Benjamin Joseph Barnard Mills, my executors or adminis-
5 trators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
) of the said Letters Patent.
NOW KNOW YE, that I, the said Benjamin Joseph Barnard Mills, do
hereby declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in
and by the following statement thereof; that is to say :-
The Invention consists in a novel combination of horizontal tubes con-
nected together by syphon tubes in such a way as to form an apparatus
with multitudinous circulation for heating air to a high temperature.
The horizontal tubes are arranged on each side of a furnace. The air
enters at the end of the first tube, and passes through the syphon tubes
connected therewith to a second horizontal tube on the other side of the
furnace. To this second tube another series of syphon tubes are con-
nected, which syphon tubes are also connected to a third horizontal tubo
lying alongside of the first horizontal tube and extending from end to
end of the furnace. The air passes along this third tube through other
syphon tubes across the furnace to a fourth horizontal tube, whence it
passes by other syphon tubes connected thereto to a fifth horizontal
tube, from which it issues to the tuyère of a furnace, or to other desired
destination.

page_text: In the arrangement described, the first, second, fourth, and fifth
horizontal tubes extend each only about half the length of the furnace,
whilst the third tube extends from end to end thereof, and the second,
third, and fourth tubes are closed at both ends, whilst the first and
fifth tubes are closed only at their inner ends, their outer ends being i
connected, the one to the source of supply of cold air, the other to a
tuyère, or to a tube or passage conducting the heated air to any desired
place. The first, third, and fifth tubes are by preference cast in two
pieces, each being again divided into two longitudinally by a division
also cast therein. If desired other numbers of horizontal tubes and of 1
syphon tubes may be used to form a greater or less extended system
of circulation for heating air.
And in order that the said Invention may be more clearly understood
and readily carried into effect, I will proceed, aided by the accompanying
Drawings, more fully to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section on the line 3, 4, 5, 6, 7, and 8 of.
Figure 2; Figure 2 is a cross section on the line 1, 2, of Figure 3; and
Figure 3 is a horizontal section of apparatus for heating air, constructed
according to the Invention.
In the apparatus, the subject of the present Invention, the cold air
coming from the pan enters the compartment A of the horizontal tube B,
which is divided into two parts longitudinally by an interior partition C
cast with the tube B. At the upper part of this tube B and communi-
cating with the compartment A are six junctions a¹, a", a", a", a", a", '
in which are fixed the vertical parts of six syphons D; the other vertical
parts of these syphons are fixed in six junctions d', d", d, d", d", d",
on the top of the horizontal tube E. Upon the same tube E are also
seven junctions e', e", e™, e", e", e", e™, in which are fixed the vertical
parts of seven syphons F, the other vertical parts of the said syphons F
being fixed in seven junctions f³‚ƒ¨‚ƒ¨‚ƒ¨‚ƒ',ƒ",ƒ™, in communi-
cation with the compartment H of the tube B. The end of the compart-
ment A is closed by an end piece G cast on the tube B; the end of the
compartment H at the end opposite to that at which the cold air enters
open and not closed, and the tube E is closed at its two ends.
is
II
From the foregoing it will be seen that the cold air entering at A
passes first by the junctions a into the syphons D, that it descends into

page_text: :
the tube E by the junctions d, again rises through the junctions e into
the syphons F, then again descends through the junctions finto the
second compartment H of the tube B.. The air already heated by these
two first circulations in the syphons D and F can then be superheated
by an analogous arrangement in a second series of syphons, as follows:-
The heated air arriving in the tube H continues its course in the first
compartment J of the horizontal tube K with which it communicates,
this tube K being like the tube B divided longitudinally by an interior
partition L cast in one with it. At the upper part of this tube K over
the compartment J are fixed eight junctions j, j", j'', j", j',
,,, in which are fixed the first vertical portions of eight
syphons M; the other vertical parts of these syphons are fixed in eight
sockets or junctions, m³, m³, m³, m", m", m", m™, m™, on the top of
the horizontal tube N. Upon the same horizontal tube N are also fixed
5 nine sockets or junctions o³, o", o™, o", 0º, 'o™, o™, i, o, in which
are fixed the first vertical parts of other syphons P, the second vertical
parts of which are fixed in their turn in nine sockets or junctions
p', p", p"; p", p', p", p™"'; p™™, p, communicating with the second
compartment Q of the tube K. The tube N is closed at its two ends;
the end R of the tube K is closed by an end piece or cover cast in one-
with the, said, tube K. The end S of the compartment Q next to the
end piece G is closed, whilst the other end T is open.
It will be seen that the air having first circulated in the two first
series of syphons D and F is conducted in a heated state into the com-.
3partment J, from thence by the syphons M it is conducted into the
tube N, from whence it again passes and circulates in the syphons P,
from which it passes into the compartment Q, and thence issues in a
superheated state to the tuyères of blast furnaces, or it may be applied to
any other desired purpose. It therefore results that in following these
O numerous circulations through the syphons D, F, M, and P; the cold air
entering at A leaves the apparatus at T in a superheated state. The
number of these circulations may be further augmented by the addition
of one or of several compartments or of series of syphons arranged in a
similar manner to those above described, that is to say, that instead of
5 the superheated air passing away directly to the tuyères by the orifice T
it may be again conducted into other tubes and syphons, as above
described, before being used: U are the furnaces which may be heated
by oil, coke, or other kind of solid or gaseous fuel; Vare the flues for
_the_escape_of the products of combustion.-

page_text: :
The adjuncts of the apparatus, such as furnaces, flues, walls, and other
parts, are arranged as heretofore, and form no part of the present Inven-
tion, which consists only in the peculiar arrangement of horizontal tubes
and syphons forming numerous circulations for the air in the apparatus,
in manner substantially as herein shown and described.
In witness whereof, I, the said Benjamin Joseph Barnard Mills,
have hereunto set my hand and seal, this Sixth day of
November, in the year of our Lord One thousand eight hundred
and seventy-two.