IMPROVEMENTS IN APPARATUS FOR BURNING GAS TO PRODUCE HEAT
Year: 1872

page_text: LETTERS PATENT to John Wallace, of 16, Grove Villas, Grove Street
Road, S.E., for the Invention of "IMPROVEMENTS IN APPARATUS FOR
BURNING GAS TO PRODUCE HEAT."
Sealed the 14th May 1872, and dated the 29th February 1872.
PROVISIONAL SPECIFICATION left by the said John Wallace at the
Office of the Commissioners of Patents, with his Petition, on the
29th February 1872.
I, JOHN WALLACE, of 16, Grove Villas, Grove Street Road, S.E., do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
APPARATUS FOR BURNING GAS TO PRODUCE HEAT," to be as follows:
This Invention has for its object improvements in apparatus for
burning gas to produce heat. For this purpose I employ a short
cylinder or drum, and in the top or cover of the drum I fix a number of
short burner tubes. The lower ends of these tubes are covered with a

page_text: piece of wire gauze enclosed within the drum. There is a passage
formed into the drum at the side in a tangential direction, and the
entrance to the passage is coned. In front of it another cone or cones
are fixed, and beyond is a nozzle or jet through which gas is caused to
issue. The axes of the cones and nozzle are all in the same straight
line, and the gas issuing from the nozzle enters the wider end of the
first cone, drawing air in with it, and the mixed stream of air and gas
enters the next cone, drawing in a further quantity of air, and so on for
as many cones as may be employed. I generally use two cones in
front of the conical entrance into the drum. In this way the gas is
thoroughly mixed with air when it enters the drum. The current
entering the drum tangentially eddies around it, and so maintains
an equal supply to the burner tubes all around the top. When the gas
is ignited at the burner tubes, fine green flames are obtained.
When a single flame burner is required, I employ a tube like that of
an ordinary Bunsen burner, but entirely open at the lower end, and by
preference coned. The gas jet is fixed below the open end of the tube
and springs from a short pipe at right angles to it. This pipe passes
through an eye in a foot which supports the burner, and a nut tightens
the eye upon the pipe. This arrangement admits of the burner being
inclined to any desired angle.

page_text: «
assigns, or such others as I, the said John Wallace, 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
Channel Islands, and Isle of Man, an Invention for IMPROVEMENTS IN
APPARATUS FOR BURNING GAS TO PRODUCE HEAT," upon the condition
(amongst others) that I, the said John Wallace, my executors or
administrators, 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 John Wallace, 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:
This Invention has for its object improvements in apparatus for
burning gas to produce heat. For this purpose I employ a short
cylinder or drum, and in the top or cover of the drum I fix a number of
short burner tubes. The lower ends of these tubes are covered with a
piece of wire gauze enclosed within the drum.
There is a passage
formed into the drum at the side in a tangential direction, and the
entrance to the passage is coned. In front of it another cone or cones
are fixed, and beyond is a nozzle or jet through which gas is caused to
issue. The axes of the cones and nozzle are all in the same straight
line, and the gas issuing from the nozzle enters the wider end of the
first cone, drawing air in with it, and the mixed stream of air and gas
enters the next cone, drawing in a further quantity of air, and so on for
as many cones as may be employed. I generally use two cones in
front of the conical entrance into the drum. In this way the gas is
thoroughly mixed with air when it enters the drum. The current
entering the drum tangentially eddies around it and so maintains an
equal supply to the burner tubes all around the top.
When the gas is
ignited at the burner tubes, fine green flames are obtained.

page_text: When a single flame burner is required, I employ a tube like that of
an ordinary Bunsen burner, but entirely open at the lower end, and by
preference coned. The gas jet is fixed below the open end of the tube
and springs from a short pipe at right angles to it. This pipe passes
through an eye in a foot which supports the burner, and a nut tightens
the eye upon the pipe. This arrangement admits of the burner being
inclined to any desired angle.
Figure 1 represents an elevation, and Figure 2 a plan of a compound
burner for burning gas mixed with air.
It consists of a closed chamber e, upon which are fixed the burners
ff. Below the burners and within the chamber is a diaphragm of
wire gauze.
A gas jet a and short conical tubes b, c, d, are arranged on
one axis and attached to the case e, so that gas passing through them
enters the case e at a tangent to its circumference. Gas issuing from
the jet a draws with it into the chamber e a supply of air through the
openings between a and b, b, and c, c, and d sufficient to ensure com-
plete combustion at the top of the burners f, where it burns with a
flame having a green inner cone. The peculiarities of this arrangement
are the succession of detached conical tubes, the mixing chamber
separated from the burner by wire gauze, and the introduction of the
air and gas at a tangent into the mixing chamber.
Figure 3 represents a side and Figure 4 an end elevation of a single
burner. It consists of a tube b, with, by preference, a slightly conical
mouth at the bottom. Beneath this tube a gas jet a is fixed, and this
jet is attached to a stand c so as to incline to any angle between the
horizontal and vertical positions. The tube e carrying the jet a passes
through an eye bolt d, by which it can be fixed at the angle or position
required for working. The peculiarities of this arrangement are the
open-mouthed burner tube with the gas jet below it, and the arrange-
ment by which the burner tube may be set to any desired inclination.

page_text: What I claim is the construction of apparatus to produce heat, sub-
stantially as described.
In witness whereof, I, the said John Wallace, have hereunto set
my hand and seal, this Twenty-third day of August, in the
year of our Lord One thousand eight hundred and seventy-
two.
JOHN WALLACE. (L.S.)