Improvements in Burners for Gas-lighting by Incandescence.
Year: 1898

page_text: Date of Application, 7th June, 1898-Accepted, 23rd July, 1898
COMPLETE SPECIFICATION
Improvements in Burners for Gas-lighting by Incandescence.
We, FERDINAND FRITZ, of Klein's Hotel, Finsbury Square, in the City of
London, Chemist, and The DAYLIGHT INCANDESCENT MANILE COMPANY LIMITED,
of 34, Palmerston Buildings, in the City of London, 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.―
Our invention relates to improvements in Bunsen or atmospheric gas-burners of
the kind or class employed in gas-lighting by incandescence.
In the burners heretofore generally employed for this purpose, the coal-gas
or other combustible gas is directed by means of a nozzle provided with a per-
forated plate into a mixing tube or chamber, which is in communication, through
lateral apertures, with the external air, and over which is placed the upper part
or head of the burner whence the mixture of air and gas issues and at the top
whereof it is ignited. Now it has been found, in practice, that the supply of air
to the burner in this arrangement is irregular, and the proper flow of the gas into
the mixing tube or chamber is liable to interference by external draughts or
currents of air, so as often to cause flickering of the light or even to cause the
flame to be extinguished
According to our said invention, in order to obviate these disadvantages, we
arrange the gas-delivery apertures of the nozzle of the burner within a short
tube terminating in a hollow truncated cone or other suitably-shaped piece which
is supported over the said nozzle so as to leave an annular space between these two
parts for the passage of a current of air which is admitted through lateral openings
in the said tube; and we form or fix on the mixing tube or chamber a second
hollow cone or bell into the base of which the first cone extends for a short
distance, a suitable annular space being left between the two cones for the
admission of a second current of air The said nozzle and the short tube and
inner cone form as it were a shortened incandescent gas-burner, while the mixing
tube and outer cone resemble the mixing tube or chamber of an oil-gas burner
In this manner we provide for the flow of concentre annular currents of air to
mix with the combustible gas, and thus ensure a very regular and efficient mixture
of the air with the combustible gas, and, by reason of the rapid rush of the air
into the annular spaces between the said cones or the like, the combustible gas
cannot escape or pass out except through the head of the burner.
In the accompanying drawing we have shown how our said invention may be
conveniently and advantageously carried into practice,
Figure 1 18 a side elevation, and
Figure 2 a vertical central section of the lower part of a burner constructed
according to our said invention.
18
18 the base of the burner whereby it is secured to the gas-supply pipe, and
which is provided with a conical top or nozzle a¹ having in the upper end thereof the
usual perforated plate 6 through which the combustible gas passes from the supply-
pipe into the mixing tube or chamber of the burner
b
Over the nozzle a¹ is mounted a short tube e terminating in a hollow truncated

page_text: cone c, which tube is secured in a ring or annular piece d screwed upon the
base a, and is provided with lateral openings for the admission of air.
An outer cone or belle is attached to the lower end of the mixing tube f, on
which tube the burner-head is to be placed in the usual way
The said outer cone
or bell e surrounds the upper part of the cone c¹ so as to leave an annular space of
suitable dimensions between them, and is supported on aims ¹ which are formed
on the ring d and are secured to the said cone oi belle by rivets or in any other
suitable manner.
By this arrangement, the air enters in separate concentric culents between
the inner cone c¹ and the nozzle a¹ and outer cone e respectively The au entering
between the nozzle a¹ and inner cone c¹ mixes with the combustible gas issuing
from the perforations in the plate b, and the gaseous mixture thus produced, on
18suing from the upper end of the cone c³, is mixed with a further quantity of air
entering through the annular space between the cones and e, and finally passes
up through the mixing tube f to the head of the burner By these means the
flow of the gas into the mixing tube or chamber is effectually protected against
interference by external draughts or currents of au Moreover, by bringing the
combustible gas into contact with separate annular currents of air, we are enabled
to ensure a very intimate mixture of the air with the said gas and thus obtain
perfect combustion.
It is obvious that the construction of our improved burner can be somewhat
modified without departing from the nature of our said invention, for example,
the said cones or equivalent devices can, if desired, be otherwise supported upon
the base a of the burner for the purpose above specified
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is -
First. In a Bunsen or atmospheric burner, the use of a hollow truncated cone
for preventing escape of the gas or disturbance of the flame by external air-currents,
substantially as herein before described
Second The improved Bunsen or atmospheric gas-burner constructed substan-
tially as herein before described with reference to the accompanying diawing, for
the purposes above specified
Dated the 7th - of Tu 1908
D YOUNG & Co,
11 & 12, Southampton Buildings, London, W.C,
Agents for the Applicants