Improvements relating to Incandescent Gas Light Burners.
Year: 1896

page_text: Date of Application, 30th June, 1896-Accepted, 8th Aug., 1896
Improvements relating to Incandescent Gas Light Burners.
A communication from СоMPAGNIE D'INSTALLATION POUR L'ECLAIRAGE ET
CHAUFFAGE PAR LE GAZ, of Bâle, Republic of Switzerland.
LE:
I, ALFRED JULIUS BOULT of 111 Hatton Garden in the County of Middlesex,
Chartered Patent Agent, 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 :-
The object of the invention forming the subject of the present application is to
produce a more advantageous arrangement, than those known at present, in order to
obtain a more perfect mixture of air and gas and therefore a more economical light.
and of greater intensity for the same consumption of gas.
The improvements consist on the one hand, in the construction of the mixing.
chamber formed as a straight cylinder, in one piece from top to bottom, that is having
no reduced or widened parts on the cylindrical circumference. The part of the
burner constituting the gallery supports the glass chimney; and the Bunsen tube
proper, has here, contrary to the custom adopted hitherto, the shape of an "Argand"
burner. The result is that the parts are wider and inore spacious and the diameter of
the mixing chamber is larger. The object of such arrangement is to draw up or
admit as much air as possible but at the same time, by placing in the mixing chamber.
several resistances or obstacles in the way of the rising gaseous column, to obtain an
extreme division and also a thorough mixing in the mixing chamber. A peculiarity.
in, the arrangement of said obstacles consists in the alternate arrangement of an
obstacle or resistance in the shape of a very fine metal tissue or fabric causing an
extreme division, and followed by a resistance having the shape of a false bottom with
crossed openings which produce partial compression.
I will call the first partition "the soft resistance" and the second partition "the
hard resistance."
It is clear that by suitable arrangement it becomes possible to modify or soften the.
ascending gaseous current on its passage to the flame, to such an extent as will be
found advantageous for obtaining a soft and powerful flame, without noise or danger
of explosion or of return of the flame.
Another improvement relates to the support or holder for the stem carrying the-
mantle.
The improvements are illustrated in Figs. 1-9 in elevation and section.
Figs. 1 and 2 are an elevation and plan of the tube comprising the first compart-
ment of the mixing-chamber and the nozzle D through which the gas enters. The
air enters through the holes a', made in the cylindrical wall a, having the shape of
longitudinal inclined slots. Fig. 3 is a section of this compartment wherein is shown
the inserted fine metallic fabric or tissue a producing the first division of the ascending
gaseous column.
0.
It will be seen in Figs. 2 and 3 that the top of the compartment is cut in the shape
of a star, the radial slots a³ allowing the passage of the rising gaseous column.
Figs. 4 and 5 are an elevation and plan of the gallery B. Fig. 6 shows a vertical
section of said gallery mounted on the compartment A just described. The gallery B
consists of the perforated lower part 6' for admission of outer air to the flame, of the
upper part 6 on which rests the glass chimney and of a central tube forming a second
compartment of the mixing chamber.

page_text: This tube 6 fitting closely the tube a of the first compartment has in its upper part
a fine tissue or fabric & and is closed by a cut crown & having the shape of a star and
provided at the circumference with radial cuts 6 and two sheaths or sleeves 65 for
supporting two branches c¹ of the spring-armed holder C of the mantle stem or
support.
The gaseous mixture escaping from a³ rises and collects in the second compartment,
from which it strikes against the "soft resistance" 63, is again divided and then
escapes through the central apertures 6 and circumferential ones 6°.
The arrows clearly indicate the passage of the gas, air and of the mixture of
the two.
Figs. 7 and 8 are horizontal sections through the holder for the mantle stem in the
part that is to say at the beginning of the fork, seen from the top and from under-
neath and Fig. 9 shows a section through the branches c¹ of the fork. By examining
these figures it will be seen that said support C for the mantle stem is arranged so as
to form a spring in all directions so that it presses against the sheaths of the crown
and pinches the stem of the mantle pin or support.
Having now particularly described and ascertained the nature of this said inven-
tion as communicated to me by my foreign correspondents and in what manner the
same is to be performed, I declare that what I claim is :-
The improvements, substantially described herein before and illustrated in the
accompanying drawing, characterized by,
1. The special arrangement of the mixing chamber forming a straight cylindrical
chamber without reduced or widened parts, and its division into two superposed
compartments, divided by perforated partitions forming alternately a "soft" and a
"hard" resistance to the ascension of the gaseous mixture, in order to produce an
extreme division and thorough mixture of the gas and air.
2. The special arrangement of the partitions, one of which is of fine metallic tissue
or fabric and forms the "soft" resistance and the other of sheet metal cut out in the
shape of a star and with radial cuts, & forms the "hard" resistance, in order to freely
draw up or admit a large volume of air at the entrance of mixing chamber and to
oppose afterwards to the ascending current of gaseous mixture suitable resistances for
establishing the most favourable conditions of formation of the mixture.
3. The special arrangement of inclined cuts or slots instead of holes on the
cylindrical surface forming the casing of the first compartment in combination with
the new form of the gallery similar to that of an Argand burner.
4. The special arrangement of the support for the mantle stem, having a forked
end, the branches of which form a spring in order to firmly engage in the sheaths
arranged in the crown of the burner, the upper part of the support also forming
a spring for grasping the stem carrying the mantle.
Dated this 30th day of June 1896.
BOULT & WADE,
Agents for the Applicant.