Improvements in Incandescent Gas Burners.
Year: 1899

page_text: Date of Application, 10th June, 1899-Accepted, 26th Aug.,
1899
COMPLETE SPECIFICATION.
Improvements in Incandescent Gas Burners.
I, JOSEPH BLASCO DE LÉRY, of No. 5, Dey Street, in the City, County and
State of New York, U.S.A., Gentleman, do hereby declare the nature of my
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 improvements in burners for incandescent gas lights.
More especially it relates to improvements in processes of forming the incan-
descible fabric into tassels, and to the tassel as a new article of manufacture.
This invention is particularly, although not exclusively, applicable to the
manufacture of tassels for incandescent gas lights. As heretofore made the
coils of said tassels have been open at the bottom, whereas, in the present inven-
tion, the tassels are formed of coiled loops in such a manner that the bend of
the loop forms the bottom of the tassel, and this construction materially reduces
the liability of disintegration at that part of the tassel, without diminishing the
incandescence when the tassel is heated by a gas flame.
The various steps in my improved process and the article of manufacture
thereby produced are illustrated in the accompanying drawings, whereof
Fig.
is a broken perspective view of a flattened loop, from which the strips
for the improved element are cut;
Fig. 2 is a broken perspective view of the curled strips, and
Fig. 3 is a section thereof on the line 3-3;
Fig. 4 is a longitudinal elevation of the curled strip turned outside in, and
Fig. 5 is a section on the line 5-5 thereof;
Figs. 6 and 7 are respectively an elevation and a section of a simple form of
tassel made with a relatively short loop:
Figs. 8 and 9 are respectively an elevation and a section of the preferred form
of tassel made with a relatively longer loop:
Figs. 10 and 11 are respectively an elevation and a section of a modified form
of tassel made from the longer loop;
Fig. 12 is a perspective view of a gas burner and assembled tassels.
A piece of combustible fabric, saturated with a suitable solution, is rolled so as
to curl the edges, to form coils or tubes, and I prefer to use for this purpose a
stocking a, such as is employed in the manufacture of incandescent mantles.
This stocking, which is long enough for a number of tassels, is cut into strips b,
(Fig. 1). These strips bare next stretched in the direction of the diameter of the
original stocking by inserting the fingers in the ends and drawing out the strip,
(Fig. 2), or in any other suitable manner. This stretching both sets the mesh,
whereby the subsequent shrinkage, when the tassels are burnt out, is diminished,
and also causes the edges c, c of the strips to curl or roll, first outwardly, then
inwardly, forming tubes or coils as seen in Figs. 2 and 3. Thus, whether I roll
the edges of the flat strips or of the loop, I produce a coil or tube, and I prefer to
turn the loop, (if such were used), outside in, (Fig. 4), whereby the curled edges
assume the position of Fig. 5. If I started with a flat strip, I sew the ends
together to form a loop, and preferably with the curled edges inward. In this
case the loop can be stretched after the ends are sewed.

page_text: The material is now ready to be made into tassels, of which Figs. 6 to 11
illustrate several varieties.
The single tassel, Fig. 6, is formed by placing any suitable cyclet d through
one end of the loop, and sewing the fabric, with properly saturated thread, around
the eyelet at e. The folds of this tassel are arranged as shown in Fig. 7, and
such tassel will preferably be formed from relatively short loops.
To form the double tassel of Fig. 8, the curled loop Fig. 4, is bent at the middle,
and the ends of the loop turned upward till they meet. The meeting ends are then
Eewed with saturated thread at f, an eyelet d is passed through the loop below the
sewing, and all the layers of fabric are then sewed together under the eyelet at g.
The folds of this tassel are arranged substantially as shown in Fig. 9.
Yet another double tassel can be formed by bending the middle of the loop,
Fig. 4, around the eyelet d, as in Fig. 10, and sewing through all the layers
beneath the eyelet as at h. The folds of this tassel are arranged as seen in
Fig. 11.
In all the modifications of the tassels, it will be observed that a number of
layers of looped fabric are firmly in contact at one end, thereby increasing the
strength and durability of the tassel after it is burnt out, but that said loops are
relatively separated at the other end which will be adjacent to the flame, so as to
be readily raised to high incandescence.
In use, a number of these tassels are arranged on the radial arms of a wheel k,
which is carried by the standard of a bunsen burner m, so that each tassel is
adjacent to a gas escape orifice n in the burner head. When the gas is ignited,
the combustible fabric is consumed and the solution of the earths is converted into
a skeleton of mineral oxide of the exact configuration of the fabric.
While the process hereinbefore set forth is peculiarly adapted to making tassels,
it is not limited thereto.
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. The process of preparing fabric for incandescent elements hereinbefore
described, and consisting in first curling the edges of incandescible fabric and
forming a loop of the curled fabric.
2. The process of forming incandescent elements from combustible fabric
herein before described, and consisting in first stretching a loop of suitable incan-
descible fabric, whereby the edges of the loop are curled, then turning the loop
outside in, so as to bring the curled edges inward and adjacent, and finally
forming an eye with the folds of the loop superimposed and sewing said folds
together at the eye.
3. As a new article of manufacture in the art of lighting, a loop of com-
bustible fabric having curled edges, substantially as and for the purposes
described.
4. As a new article of manufacture, a loop of combustible fabric having curled
inner edges, substantially as described.
5. An incandescent element consisting of a loop of combustible fabric having
curled inward edges, and provided with an eyelet, substantially as described.
T
1
10
1
n
1000
DAY, DAVIES & HUNT,
Chartered Patent Agents, 321, High Holborn, London, W.C.,
Agents for the Applicant.