Improvements in Atmospheric Gas-burners.
Year: 1895

page_text: Date of Application, 14th June, 1895
Complete Specification Left, 10th Apr., 1896-Accepted, 13th June, 1896
Improvements in Atmospheric Gas-burners.
I, HERBERT EDMUND MOUL, of 68, Victoria Street, in the City of Westminster
and County of Middlesex, Engineer, do hereby declare the nature of this invention
to be as follows:-
The object of this invention is to produce an atmospheric gas-burner specially
adapted for use in incandescent gas-lighting, and whereby a very intense and well
shaped flame may be obtained.
In a burner constructed according to my improved method, the tube in which
the mixing of the gas with atmospheric air takes place is formed upon the principle
of the injector, its internal diameter, at a point opposite or immediately above the
gas orifice, being contracted; so that the jet of gas induces a relatively large
volume of air to enter the mixing tube. Between this point and the upper
extremity of the burner, the tube gradually expands. In most burners of this
class, the gas is burnt over the whole area of the burner-top; whereas, for my
purpose, the most suitable form of flame is that of a hollow cone. In order to
render the flame of this type, I place below the burner-top a deflector or body.
adapted to divert the gaseous mixture to the annular chamber which forms the
burner-top; whilst, with a view to supplying air to the interior of the hollow flame
and thus to intensify the heat, I provide a passage or passages which extend
through the outer and inner walls of the annular chamber and serve at the same.
time to support the deflector centrally. To prevent the flame striking back, the
mouth of the burner may be fitted with wire-gauze in the usual manner.
Improvements in Atmospheric Gas-burners.
I, HERBERT EDMUND MOUL, of 68, Victoria Street, in the City of Westminster
and County of Middlesex, Engineer, do hereby declare the nature of this invention
(a communication to me from Rudolf Langhaus, of 12 B, Elizabeth Strasse,
Berlin, in the German Empire, Electrical Engineer,) 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 this invention is to produce an atmospheric gas-burner specially
adapted for use in incandescent gas-lighting, and whereby a very intense and well
shaped flame may be obtained.
An atmospheric gas-burner embodying my invention is represented in the
accompanying drawings, whereof Fig. 1 is a vertical section and Figs. 2 and 3
are transverse sections taken on the lines x- and y-y respectively in Fig. 1.
In a burner constructed according to the improved method, the tube a, in which
the mixing of the gas with atmospheric air takes place, is formed upon the
Price 8d1

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principle of the injector, its internal diameter, at a point coincident with or
immediately above the gas-orifice b, being contracted; so that the jet of gas induces
a relatively large volume of air to enter the mixing chamber a¹. Between this
point of contraction and the upper extremity of the burner, the tube gradually
expands. In most burners of this class, the gas is burnt over the whole area of
the burner-top; whereas, for the present purpose, the most suitable form of flame
is that of a hollow coue. In order to render the flame of this type, a deflector or
body c is placed below the burner-top; the said deflector being adapted to divert
the gaseous mixture to the annular chamber a² of the burner-top; whilst, with a
view to supplying air to the interior of the hollow flame, and thus to intensify the
heat, a passage or passages d d is or are provided which extend through the outer
and inner walls of the annular chamber a² and serve at the same time to maintain
the deflector c in a central position. To prevent the flame striking back, the mouth
of the burner may be fitted with wire-gauze e in the usual manner; the burner
being also furnished with steatite rings ff.
The burner may be connected with the gas nozzle b in any convenient manner.
I am aware that deflectors, as also passages communicating with the external
air, have been used in connection with "Argand" burners. I am also aware that,
in order to obtain the greatest efficiency where a jet of fluid is employed to impart
momentum to another fluid, a gradually contracting and then gradually expanding
passage about and in front of the jet-orifice has been found advantageous.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I claim :-
"
In an atmospheric gas-burner, the combination, with a gradually contracting and
then gradually expanding tubular passage, arranged about and in front of the gas-
orifice and operating in conjunction therewith to produce an " injector-action
upon the surrounding air, of a deflector situated in the mouth of the burner,
and means for conducting air to the interior of the flame, the whole operating
substantially as set forth."
Dated this 10th dow of Anril 1906