An Improvement in Bunsen Burners.
Year: 1888

page_text: Date of Application, 17th Apr., 1888
Complete Specification Left, 10th Sept., 1888
Complete Specification Accepted, 12th Oct., 1888
An Improvement in Bunsen Burners.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the County
of Middlesex, Fellow of the Institute of Patent Agents, do hereby declare the nature
of this invention to be as follows:-
This invention relates to a construction of Bunsen burners in such a manner as to
produce a circular flame with internal, as well as external, air supply.
The gas entering at the bottom passes vertically through several small holes in a
thin plate into a cavity which air enters through lateral apertures. From this cavity
the gas and air ascend a tube which expands at its upper end to a diameter equal to
that of the desired flame. This expansion of the tube is covered by wire gauze
which serves to mix the gas and air and distribute the mixture uniformly.
The mixture then ascends an annular passage formed between an external tube
and an internal tube which is closed at its lower end and tapers to a larger diameter
at its upper end. To the lower end of this taper tube there are several inlets for
air from outside the outer tube, these inlets being formed by short tubes crossing the
annular passage between the two tubes.
At the upper end of the tubes the mixture of gas and air issues from the annular
mouth between them, and this mixture being ignited, the circular flame receives air
not only from the outside but also from the internal tapered tube.
ABEL & IMRAY,
Agents for the Applicant.

page_text: I OLIVER IMRAY of No. 28 Southampton Buildings Chancery Lane in the County
of Middlesex Fellow of the Institute of Patent Agents 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:-
This invention relates to a construction of Bunsen burner in such a manner as to
produce a circular flame with internal, as well as external, air supply as I will describe
referring to the accompanying drawings. Fig. 1 is an elevation Fig. 2 a vertical
section, and Fig. 3 a sectional plan on X X of Fig. 1 shewing a burner according to
this invention.
The gas, entering at the bottom G, passes vertically through several small_holes in
a thin plate g into a cavity A which air enters through lateral apertures a. From the
cavity A the gas and air ascend a tube T which expands at its upper end to a diameter
equal to that of the desired flame. This expansion of the tube is covered by wire
gauze W which serves to mix the gas and air and distribute the mixture uniformly
through the enlarged part B of the tube.
The mixture then ascends an annular passage C formed between the external
tube B and an internal tube or thimble D which is closed at its lower end and tapers
to a larger diameter at its upper end.
To the lower part of the thimble D there lead several inlets e for air from outside
the outer tube B, these inlets being formed by short tubes crossing the annular
passage C.
At F the upper end of the tubes the mixture of gas and air issues from the annular
mouth between them, and this mixture being ignited forms a circular flame which
receives air not only from the outside but also from the interior of the thimble D to
which the air is admitted by the inlets e.
The upper part of the tube B and of the thimble D may be of metal as shewn. It
is generally however preferable to make those parts which are next the flame of
steatite or such like material.
Having now particularly described and ascertained the nature of this Inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is:
A Bunsen burner arranged to give a circular flame with internal as well as
external air supply, substantially as described and illustrated by the drawings.
TAL: 10th day of Santamben 1000
ABEL & IMRAY,
Agents for the Applicant.