Improvements in Burners for Incandescence Oil Lamps.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Burners for Incandescence Oil Lamps.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, Chancery
Lane, in the County of London, Chartered Patent Agent, do hereby declare the
nature of this invention (as communicated to me from abroad by Herren Kuhnt
and Deissler, of Alexander Strasse 38, Berlin, in the Empire of Germany) to be
as follows:
This invention relates to an improved construction of burners for incandescence
oil lamps, which I will describe with reference to the accompanying drawing,
in which Fig. 1 shews a vertical section of the lamp, Fig. 2 a plan, with the
glass and gallery removed, Fig. 3 a sectional plan at C D Fig. 1, Fig. 4 a cross
section at A B and Fig. 5 is a separate view of the top part of the air supply
tube.
The burner has the usual two caps surrounding the wick, of which the outer
one carries the incandescence mantle, while the inner one effects the throttling
of the flame for producing the requisite blue flame in the known manner.
The present invention relates to an improved construction of the central air
supply tube, within the wick tube, and its flame spreading flange and head. The
object of this tube and head is the same as in the existing construction, namely
to effect an intimate mixture of the combustible vapours with the central supply
of air, and to cause such mixture to strike in an outward direction above the
spreader, so as to produce a perfect blue flame without odour.
The improved means for attaining these objects consist firstly in constructing
the upper part or head of the air tube of a conical or tapering form as shewn
instead of making it cylindrical and of the same diameter as the part below the
spreading flange n¹, as heretofore.
By this means a more advantageous effect of the air currents issuing through
the perforations upon the flame is produced, while the solid imperforated top
plate n causes an effectual outward spreading of the flame, so as to produce a
bright incandescence of the mantle on the outer cap. Secondly, the part of the
air tube below the spreading flange n¹ is not formed with small round holes or
perforations as heretofore, but is provided with helically or obliquely arranged
slots, as shewn at n³ Fig. 5. By this means the air and vapour in passing through
have a circular eddying motion imparted to them whereby a greater uniformity in
the character of the flame round the wick is insured.
The main advantage of the above described improved construction is that the flame
remains of a uniform character from the commencement, and when once adjusted
it does not subsequently black or soot when the lamp becomes hot, so as to require
re-adjustment. By this means a perfectly uniform action is attained, producing a
bright incandescence of the mantle.
ABEL & IMRAY,
Agents for the Applicant.

page_text: improvements in Burners for incandescence on Lamps.
I, OLIVER IMRAY, of Birkbeck Bank Chambers, Southampton Buildings, Chancery
Lane, in the County of London, Chartered Patent Agent, do hereby declare the
nature of this invention (as communicated to me from abroad by Herren Kuhnt
& Deissler, of Alexander Strasse, 38, Berlin, in the Empire of Germany), and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to an improved construction of burners for incandescence
oil lamps, which I will describe with reference to the accompanying drawing
in which Fig. 1 shews a vertical section of the lamp, Fig. 2 a plan with the
glass and gallery removed, Fig. 3 a sectional plan at C D Fig. 1, Fig. 4 a cross
section at A B and Fig. 5 is a separate view of the top part of the air supply
tube.
As in the construction described in the specification to my application for a
patent No. 1180398 the burner has two caps surrounding the wick of which the
outer one carries the incandescence mantel, while the inner one effects the thrott-
ling of the flame for producing the requisite bluc flame in the known manner;
these caps are in the present case preferably made with cylindrical upper ends
as hereinafter described.
The present invention relates more particularly to an improved construction of
the central air supply tube, within the wick tube, and its flame spreading flange
and head. The object of this tube and head is the same as that of the construction
described in the specification to my said application No. 118038 namely to effect
an intimate mixture of the combustible vapours with the central supply of air,
and to cause such mixture to strike in an outward direction above the spreader, so
as to produce a perfect blue flame without odour.
According to the present invention the air supply tube e fitted within the
inner wick tube a has its upper end extending above the wick tube enlarged
so as to form firstly a flame spreading flange f, and above this a conical or
tapering head e³, of which the flat top e is imperforate while the conical surface
has perforations 7, the bottom of the head is of the same diameter as the spreading
flange while the upper end is reduced to a diameter less than that of the part
below the flange f.
The part of the tube e below the spreading flange f is provided with helically
or obliquely formed slotted holes i. The two caps c d (of which the outer one d
serves to support the incandescence mantle) are preferably formed with their upper
ends cylindrical instead of with an inward curvative as heretofore.
By the above, described construction of the burner a more advantageous effect
of the air currents 3 issuing through the perforations of the conical head upon the
flame is produced while the flat imperforate top causes an effectual outward spread-
ing of the flame, so as to produce a bright incandescence of the mantle. Also, by
making the holes i of a slotted helical form the air and oil vapours in passing
through have a circular eddying motion imparted to them whereby a greater
uniformity in the character of the flame round the wick is insured.
In addition to the air currents 2 and 3 passing through the above described
perforations of the air tube e air currents 4 pass through the annular space between
the wick tube a' and the inner cap c, also air currents 5 pass through holes in cap c
and rise through the space between the two caps and d while other air currents 6
pass through holes in the gallery below the glass and rise between the latter
and the incandescence mantle.
The action of the several above described air currents is to produce several

page_text: different combustions, the currents 2 effect a first combustion on the inner edge of
the wick, and the unburnt vapours produced by the heat pass partly upward
between the cap c and the spreading flange f and partly they pass inwards through
the slots i in order to issue again together with air through the holes of the
conical head e. On issuing, the mixture enters into combustion which is sup-
ported by the air currents 4 and 5 so as to effect complete combustion; the before
mentioned unburnt vapours passing up between c and f also mix and enter into
combustion with the air currents 4 and combine with the flame above the
flange f.
The air currents 6 on the other hand pass between the mantle and the lamp
glass for preventing the outward bulging of the former against the latter.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is:-
:-
1. A burner for incandescence oil lamps having a central air supply tube such
as e with flame spreading flange f forming part of the enlarged perforated conical
or tapering head e3 with imperforate top e, helical slotted air holes i being formed
below the flange f substantially as and for the purposes herein described.
2. In a burner for an incandescence oil lamp the combination of the wick
tube a a', two caps c da central air tube e having a flame spreading flange f
above the wick, a conical or tapering perforated, head e extending upward from
the flange f and slotted helical air holes i-formed in the sides of the tube e below
the flange f substantially as described.
Dated this 16th day of February 1899.