Improvements in and connected with Burners for Incandescent Gas Lighting.
Year: 1898

page_text: Date of Application, 29th Jan., 1898-Accepted, 26th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in and connected with Burners for Incandescent
Gas Lighting.
I, JOSEPH BLASCO DE LÉRY, of 58, Pine Street, New York, in the County and
State of New York, in the United States of America, Gentleman, 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 incandescent gas burners and consists in an improved
construction of the tufts or bunches of the incandescent material described in the
Specification of my previous Letters Patent No. 9940 dated the 21st day of April 1897.
As described in the specification referred to, the incandescent material is supported
upon a ring, it being formed of sheets or layers bunched and secured together along
one edge, to be in supporting contact, while at the other edge the layers are
separated to admit the heat of the flame and furnish as large a surface as possible
for incandesence. In the use of this device I have discovered that it is necessary to
form these tufts of the incandescent material in a definite manner with a view to
opening the lower edges and forming them into a series of open ended cones or caps
similar in shape to the well known hood or mantle for single burners, and the chief
object of the present invention is to fold or adjust the incandescent material in such
a manner as to produce open or partially open ended cones into which the gas flame
may rise.
In the accompanying drawing, to which I will now refer ;
Fig. 1 is a plan of the blank sheet or layer of incandescent material before it is
folded.
Fig. 2 is a perspective view after the first folding.
Fig. 3 is a perspective view after the second folding.
Fig. 4 is a perspective view of the finished tuft ready to go to its place in the
burner, and
Fig. 5 shows a series of tufts arranged in place above the gas outlets.
A sheet of ordinary fabric a, impregnated with the oxide of a rare earth or other
suitable incandescing material, of oblong or similar rectangular shape, is folded, first,
inward along both of the longer edges until the two outer edges nearly meet
along the centre line of the strip. The strip is then folded transversely at the
middle to bring the folded edges together, as shewn at Figure 3. The sheet thus
folded may then be saddled over a short tube or spool 6 and securely tied or bound
in place thereon by threads c. This binding causes the free ends to open out and
assume a conical shape, as shewn in Fig. 4, with the apexes of the cones at the
binding of thread. Each of these cones is similar in shape to an ordinary hood or
mantle except that it will be much smaller and at its upper part it will rest against
its mate or mates, one thereby furnishing a support for the other which sustains
them against jars and vibrations. The group of cones or tufts thus formed may be
used singly or with others, the latter being preferable; it may be supported upon a
horizontal rod e in contact with others as shown, with gas outlets f arranged directly
below them so that the flames therefrom will extend upward into the cones and so
bring to incandescence the entire cone from its base to the apex, but in whatever
manner the groups or cones may be supported, whether singly or in a group with

page_text: others, as in Fig. 5, the connecting together of a plurality of cones at their apexes
for the purpose of mutual support, still remains a prominent feature of the
invention.
The particular number and kind of folds given to the sheet are not absolutely
essential to obtain the conical formation; for instance, the longer edges might be
folded two or three times or even curled, and produce substantially the same results.
As stated, the folded sheet assumes the conical shape by the mere binding of the
thread, but this can be aided or improved by using a conical mandril. Obviously it
is not essential to saddle the folded sheet over a short tube, as described, since the
binding at the fold will accomplish what is desired without it and furthermore, it
may be desired to support the tuft in other ways.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In an incandescent burner, a plurality of conical mantles secured together at i
their apexes for mutual support, in combination with a gas outlet arranged to direct
its flame or flames into said cones, constructed and arranged substantially as
herein before described and as illustrated by the accompanying drawings.
2. In an incandescent burner, a plurality of conical mantles each constructed from
a single piece of fabric and secured together at their apexes for mutual support, in
combination with a gas outlet arranged to direct its flame or flames into said cones,
constructed and arranged substantially as described, and as illustrated by the
accompanying drawings.
3. In an incandescent burner, a mantle or the like consisting of a single sheet of
incandescing material substantially rectangular in shape having two opposite sides 2
folded towards each other and again folded transversely so that the other two edges
will be brought together, and provided with a binding thread or device adjacent to
the transverse fold, substantially as and for the purpose set forth, and as illustrated
by the accompanying drawings.
4. In an incandescent burner, a mantle or the like consisting of a single sheet of a
incandescing material substantially rectangular in shape having two opposite sides
folded towards each other, in combination with a support over which the folded
material is saddled and a binding device for holding the material on the support and
opening the free edges of the material, substantially as described, and as illustrated
by the accompanying drawings.
Dated this 28th day of January AD 1808
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