Improvements in Apparatus for Mixing Gas and Air for Gas-furnaces.
Year: 1893

page_text: Date of Application, 25th Nov.. 1893
Complete Specification Left, 22nd Aug., 1894-Accepted, 22nd Sept.. 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Mixing Gas and Air for
Gas-furnaces.
We, GOTTFRIED AXDORFER, of 60 Gänsemarkt, Hamburg, Mechanical'
Engineer, and CHRISTIAN FRIEDRICH HEINRICH SASS, of 101 Langereihe,,
St. Georg, Hamburg, Merchant, both in the Empire of Germany, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to apparatus for mixing gas and air for gas-furnaces.
By means of the apparatus constructed according to our said invention such gas
and air can be more rapidly and intimately mixed than with the devices heretofore
employed. By reason of the uniform mixing of gas and air the occurrence of
pointed flames is completely obviated and a smokeless combustion ensured.
The improved apparatus comprises a mixing chamber arranged between the
combustion or igniting chamber and a number of gas and air inlet nozzles. The
lateral walls of the mixing chamber are provided with slots which correspond to.
the orifices of the said nozzles, which have also the form of slots. We arrange in
the mixing chamber a grate slide adapted to be adjusted by means of screws and
having bars which cover the slots in the aforesaid two walls more or less according
to the adjustment in order to regulate the quantity of gas or air which passes out
for the combustion.
As the gas and air on leaving the nozzles impinge against the bars of the slide
and against the opposite wall of the mixing chamber strong whirling movements
are produced in the latter so that the gas and air serving for the combustion will
become intimately mixed. The mixture then passes through the slots in the wall
of the mixing chamber into the combustion chamber, which for instance in the
case of steam boilers may form the front part of the furnace, the heating flame
spreading from the combustion chamber freely in the furnace. The mixture of
gas and air may be ignited in any suitable manner.
Owing to the uniform mixing of the gas and air and to the adjustment of the
slide covering a portion of the slots we obtain a very extensive and uniform
spreading of the flame. produced, thereby obviating the injurious pointed flames.
and effecting a complete utilization of the fuel, so that smoke will be entirely
absent from the products of combustion which finally escape and a considerable
saving of fuel will be realized. The preliminary heating of the air used for the
combustion may be effected according to circumstances.
Dated this 25th day of Naizamber 1903
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.
Improvements in Apparatus for Mixing Gas and Air for
Gas-furnaces.
We, GOTTFRIED AXDORFER of 60 Gänsemarkt, Hamburg, Mechanical
Engineer, and CHRISTIAN FRIEDRICH HEINRICH SASS of 101 Langereihe,
St. Georg, Hamburg, Merchant, both in the Empire of Germany, do hereby
declare the nature of this invention and in what manner the same is to be.
[Price 83 1

page_text: statement:-
Our invention relates to improvements in gas furnaces and more particularly to
the apparatus for mixing gas and air in gas-furnaces; the object of our invention
is however to afford a more rapid and intimate mixing of such gas and air than is
possible with the devices heretofore employed.
By reason of the uniform mixing of gas and air not only is the occurrence of
pointed (blow-pipe) flames completely obviated but a smokeless combustion is also
ensured.
We attain the said object by the mechanism illustrated in the accompanying
drawing, in which―
Figure 1 is a sectional side elevation of our improved gas and air mixing
apparatus ;
Figure 2 is a transverse section of the same, and
Figure 3 is a section taken at right angles to Figure 2.
Similar letters of reference indicate corresponding parts throughout the several
views.
The improved apparatus comprises a mixing chamber d arranged between the
combustion or igniting chamber a and the gas and air supply forming nozzles b
and c respectively. The lateral walls e and fof the mixing chamber are provided
with slots e and f¹ respectively, which correspond to the orifices of the said gas
and air inlet nozzles, which have also the form of slots. We arrange in the mixing
chamber d a grate slide g adapted to be adjusted by means of screws s and having
bars g' which cover the slots in the aforesaid walls e and f more or less according to
the adjustment, in order to regulate the quantity of gas and air which passes out
for combustion.
As the gas and air on leaving the nozzles impinge against the bars g' of the
slide and against the opposite wall of the mixing chamber d strong whirling
movements are produced in the latter so that the gas and air serving for the
combustion will become intimately mixed. The mixture then passes through the
slots in the wall of the mixing chamber into the combustion chamber a, which
for instance in the case of steam boilers may form the front part of the furnace,
the heating flame spreading from the combustion chamber freely in the furnace.
The mixture of gas and air may be ignited in any suitable manner.
Owing to the uniform mixing of the gas and air and to the adjustment of the
slide covering a portion of the slots, we obtain a very extensive and uniform
spreading of the flame produced, thereby obviating the injurious pointed or blow
pipe flames and effecting a complete utilization of the fuel, so that smoke will be
entirely absent from the products of combustion which finally escape and a
considerable saving of fuel will be realized. The preliminary heating of the air
used for the combustion may be effected according to circumstances.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. In combination, a combustion chamber, a mixing chamber provided with outlet
ports in its wall proximate to the combustion chamber and with separate gas and
air inlet ports in its opposite wall, said inlet ports being arranged diametrically
opposite the outlet ports, and intercepters as bars, interposed between the respective
ports, for the purpose set forth.
2. In combination, a combustion chamber, a mixing chamber provided with outlet
ports in its wall proximate to the combustion chamber and with separate gas and
air inlet ports in its opposite wall, said inlet ports being arranged diametrically
opposite said outlet ports, and intercepters, as bars interposed between and of less
width than that of said inlet and ontlet ports, for the purpose set forth.
3. In combination, a combustion chamber, a mixing chamber provided with outlet
ports in its wall proximate to the combustion chamber and with separate gas and

page_text: air inlet ports in its opposite wall, said inlet ports arranged diametrically opposite
said outlet ports, and intercepter bars interposed between and adjustable relatively
to said inlet and outlet ports, for the purpose set forth.
4. In combination, a combustion chamber a mixing chamber provided with outlet
ports in its wall proximate to said combustion chamber and with separate gas and
air inlet ports in its opposite wall said inlet ports arranged diametrically opposite
said outlet ports, an intercepter consisting of a grate having bars of less width than
that of the inlet and outlet ports, interposed between said ports for the purpose
set forth.
5. In combination, a combustion chamber, a mixing chamber provided with outlet
ports in its wall proximate to said combustion chamber and with separate gas and
air inlet ports in its opposite wall said inlet ports arranged diametrically opposite
said outlet ports, an intercepter consisting of an adjustable grate having bars of
less width than that of the inlet and outlet ports, interposed between said ports,
for the purpose set forth.
6. In combination, a combustion chamber, a narrow-mixing chamber provided
with outlet ports in its wall proximate to said combustion chamber and with
separate gas and air inlet ports in its opposite wall, said ports arranged
diametrically opposite each other and having the form of long slots or slits, and
an adjustable grate having bars of less width than that of the inlet and outlet ports
interposed between said parts, for the purpose set forth.
Dated this 22nd day of August 1901
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.