Improvements in Apparatus for Mixing Gas and Air Supplying Incandescence Burners.
Year: 1895

page_text: Date of Application, 23rd July, 1895-Accepted, 19th Oct.. 1895
JUMI LEIM
SPECIFICATION.
Improvements in Apparatus for Mixing Gas and Air Supplying
Incandescence Burners.
I, LOUIS DENAYROUZE, of 70 Boulevard Victor-Hugo, Neuilly, (Seine) France,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
In
my former Specifications No. 7722 of 1895 and others I have described means
of mixing the gas and air supplying burners of the Bunsen kind for incandescence
gas lighting; my present invention relates to means of working the mixer in the
form of a fan rapidly revolving in a chamber to which gas and air are admitted, and
from which they pass intimately mixed to the burner, as I shall describe referring
to the accompanying drawings.
Fig. 1 is a front view partly sectional and Fig. 2 is a vertical section shewing
apparatus according to my invention driven by clockwork;
Fig. 3 is a vertical section and Fig. 4 a sectional plan of the mixing apparatus
driven by the current of gas supplied.
Referring first to Figs. 1 and 2, the gas passes by the conduit A' to a chamber F
whence it passes by openings formed in the partition g around the air inlet tubes f
to the mixing chamber G in which revolves the mixing fan H drawing in air while
the gas enters with it. The fan is driven from a spring barrel B¹ a wheel C¹ on
which drives a pinion D¹ on an axis E¹ which carries a worm wheel F¹. This drives
a worm G¹ on an axis H' carrying another worm wheel I' which drives the worm J₁
on the axis of the fan H. This axis revolves on spring points m, and the fan
revolving with great velocity thoroughly mixes the gas and air and drives the
mixture into the burner tube I over which is the mantle J.
As the barrel B' revolves the spring tends to become weaker and would therefore
drive the fan H more slowly, but I provide against this by winding up the spring as
it unwinds in the following manner.
On the barrel to which the one end of the spring is attached I fix a ratchet
wheel L' with which engages a spring pawl lever M' terminating in a piece N¹
which, when the pawl enters a space between the teeth of L' makes a contact
with P by which an electrical current is transmitted to a solenoid or electromagnet
coil Q. When the pawl is raised by a tooth of L' the contact of N₁ and P' is
broken. On the axis of the barrel to which the other end of the spring is attached
1 fix another ratchet wheel K' similar to L' and I provide a lever T¹ connected to
an armature S' and carrying a pawl U. Whenever the magnet R' is excited it
attracts S¹ raising the pawl U₁ and thus moving K¹ a tooth to compensate for the
wheel turning a tooth. Thus as the spring unwinds turning L₁, the wheel K¹
winds it up.
For starting the apparatus the burner is provided with a gas cock by the opening
of which a brake (not shewn) is released and an electric current is switched in.
When the cock is closed the brake is put on stopping the mechanism and switching
off the current. For the solenoid or electromagnet may be substituted any
equivalent organ worked by any accessible motor, steam, compressed air, vacuum,
spring motor, gas, oil, water or other motor. The winding apparatus may in some
cases be dispensed with, care being taken to wind up the spring at sufficiently short.
intervals.

page_text: When the gas has sufficient pressure it may be applied to drive the mixer as
shewn in Figs. 3 and 4.
The fan H is fitted to turn freely in the casing G, its axis being preferably
pivotted on jewels. Holes V₁ V¹ near the centre of the casing admit air, while the
gas enters through adjustable nozzles X'X' in jets which act on the vanes of H
causing it to revolve, drawing in air, mixing it with the gas and propelling the
mixture up the burner tube I. When air somewhat compressed is available it may
be sent through the nozzles X'X' the gas entering by central apertures.
As the pressure of the mixture issuing from the burner should be as low as
possible, the utilisation of the gas pressure in driving the mixer has the advantage
of producing the necessary reduction of pressure at the burner. In cases where the
service gas has not sufficient pressure, an exhauster may be employed to raise the
pressure, or air somewhat compressed, as mentioned above may be applied to drive
the mixer.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination of a gas and air mixer for an incandescence burner with a
spring motor so arranged as to produce an intimate mixture of the gas and air with
a small expenditure of power, maintained regularly for a long period.
2. The combination of the gas and air mixer for an incandescence burner with a
compensating mechanism which accumulates the small power employed and serves
it out with perfect regularity to the gear which drives the mixer.
3. The utilisation of the gas pressure to work the gas and air mixer substantially
as described.
4. The burner apparatus substantially as described with reference to the accom-
panying drawings.
Dated this 23rd day of July 1895.
ABEL & IMRAY,
Agents for the Applicant.