Improvements in Incandescent Gas Burners.
Year: 1897

page_text: Date of Application, 6th Apr., 1897-Accepted, 15th May, 1897
COMPLETE SPECIFICATION.
Improvements in Incandescent Gas Burners.
I, DANIEL MEYER, of 15bis, Boulevard St. Denis, Paris, in the Republic of France,
Chemist, 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, and accompanying drawing, that is to say :-
This invention has for its object an improved burner for incandescent lamps, which
consists more particularly in a novel method of construction and arrangement of the
incandescent "mantle," in which strings of beads made of material capable of the
required incandescence are used, such mantles not being liable to breakage as in
the mantles ordinarily used.
By the mixture of suitable chemical substances of the well-known kinds, a compact
incandescent material is obtained which is dried and hardened and formed into
particles of any suitable shape, such as spheres, cubes, cylinders, pyramids; or in
clusters or bunches like grapes, tulips, and the like, of any suitable dimensions from
about 1 millimêtre.
The particles or grains thus produced, are traversed centrally or at one side by one
or more metallic or other suitable wires or threads, by which strings or rows of
them are formed.
The several strings or rows may be combined either one above the other, or side by
side, that is to say, horizontally or vertically-to form the mantle.
Or the incandescent grains may be arranged in zigzag form, alternate squares,
or the like.
Or, in some cases, the metallic or other wires connecting them may be omitted, the
grains being then connected or attached together by suitable means, before being
finally mounted upon the burner.
The accompanying drawing is in illustration of my invention.
Figure 1 is a side view of an incandescent burner made according to my
invention.
Figure 2 is a plan shewing the arrangement of the incandescent material.
Figure 3 is a side view, partly in section, of the metallic support or frame.
Figure 4 is a detailed view, shewing the method of attaching the strings of
incandescent beads.
Figure 5 shows a modified arrangement of the incandescent grains.
Figure 6 is a side view of the Bunsen burner used, and Figure 7 is a horizontal
section through the line 1-1, in Figure 6.
Round a metal ring a are arranged a number (twelve for instance) of hooks bat
equal distances apart, and upon this ring a is also provided a bracket c in which a stem d
carrying a ring or top e is fixed at the required height by a screw.
The rows or strings consist each of nine (in the drawing) beads or particles
of the incandescent material, five rows of larger ones and four rows of smaller
ones being shown, threaded upon a double wire of metal or other suitable material
forming a loop at one end (g, Figure 4). To form the mantle the loops g are
fitted over the hooks b, and the other ends of the wire are then fastened round the
upper ring e.
The gallery is supported directly upon the shoulder i of the Bunsen burner,
which is provided, at the part below the gallery, with four openings j, which I make
as high as possible instead of the limited height ordinarily used.

page_text: These openings are fitted inside with wire gauze, and in the lower part of the Bunsen
burner is screwed at a gas jet communicating with the gas supply pipe, an I pierced
with five small holes for the passage of the gas.
The object of this arrangement is to allow the admission to the burner of a much
larger volume of air than is the case in ordinary burners of the kind.
The burner thus made is much stronger and more durable than all heretofore
existing forms of incandescent burner.
Moreover, it wears away much less easily, and may be used for many years without
requiring any repair.
It can be readily carried about without injury, and it can be easily used and lighted
in the ordinary way.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
-claim is :-
1. The improved unbreakable burner, consisting of strings of beads or particles
formed of incandescent material threaded upon a double wire which forms a loop at
one end and arranged round the flame of the burner, substantially as described and
illustrated.
2. In the incandescent gas burner described and claimed in Claim 1, the use of
incandescent material obtained by mixing suitable chemical products so as to obtain
after grinding a compact material which is dried and hat dened and formed into beads,
grains, or particles, of any suitable shape, which are arranged in strings round the
burner horizontally or vertically, or are formed into groups of any suitable form,
substantially as described and illustrated.
3. In the incandescent burner of the kind described and claimed in Claim 1, the
method of fixing the strings of beads, grains, or particles, by engaging the loop in
the wire upon which they are strung, upon hooks arranged round a metal ring, the
wires at the other ends of the chains being fixed upon a ring of smaller diameter
carried at a sufficient height above the lower ring, by a vertical adjustable stem
carried by the latter, substantially as described and illustrated.
4. In incandescent burners of the kinds claimed in Claims 1, 2, and 3, the use of a
Bunsen burner, with a gas jet, to which air is supplied by four openings of greater
height than those heretofore used, the openings being fitted inside with wire gauze,
-substantially as described and illustrated.
Dated this 5th day of Anril 1897
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.