Improvements in Atmospheric Burners.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Atmospheric Burners.
WARREN BODEN SMITH, of 66, College Street, Chelsea, S.W., Engineer, do
hereby declare the nature of this invention to be as follows;-
The object of the first part of my invention is to impart to gas or gas and air
in a burner a centrifugal or revolving action without checking considerably the
flow of the mixed gases. This I accomplish by supplying air so that it is deli-
vered in a circulating condition or so that it strikes the column of gas or gas
and air tangentally which may be done by means of spiral or suitable slots or
suitable air guides in the burner or both. The object of the second part of my
invention is to make an atmospheric burner as short as is conveniently possible
and yet to give a mixture of gas and air sufficient time to become intimately
mixed or to more intimately mix the gas and air in the burner (1) by causing
the mixed gases to travel horizontally as well as vertically in the burner (2) by
using three parallel tubes of about equal size and causing the whole of the mixed
gases to pass through each of the tubes (3) by enclosing the first burner tube or
part in a second tube divided into two or more compartments the gases being
caused to descend one or more of the compartments and to reascend by the
remainder.
Dated this Twenty-second day of Anril 1898.
Improvements in Atmospheric Burners.
WARREN BODEN SMITH, of 66, College Street, Chelsea, S.W., Engineer, 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 follow-
ing statement:-
-
In Patent 21340-1895-Figure 8 an atmospheric gas burner is shown in
which the horizontal movement of the gases in changing from the descending
to the re-ascending compartments is little except radial.
My invention is an atmospheric gas burner, the upper part having what is
practically two principal tubes, one inside the other, the space between these
two tubes being formed into compartments by means of partitions extending from
the outer to the inner tube (or nearly so), whereby gas and air after ascending
together the inner tube descend one or more of these compartments and re-ascend
by the remainder; or an atmospheric gas burner in which gas and air after
ascending together the compartment most central descend by one or more com-
Price Sd1

page_text: partments in the burner and then the bulk of the gases in changing from the
descending to the re-ascending compartments move in a direction not radial to
the vertical axis of the most central compartment, but in such a direction as to
thereby encompass or partly encompass the most central compartment. The
way I prefer to carry this into effect is as follows:-
I construct the upper part of my burner with two concentric tubes and form, by
partitions extending from the inner to the outer tube alternate descending and
re-ascending compartments round the inner tube. I prefer the partitions enclos-
ing the descending compartments to form parallels but do not limit myself-
See Figs. 1, 2 and 3. If the number of the compartments be four, the partitions
and canopy may be formed by a single strip of metal bent like an inverted U,
touching the outer tube with its two principal edges or nearly so and touching
(or nearly so) the inner tube at parts parallel to its two edges-see Fig. 1, which
is a plan section of Fig. 1 or Fig. 1" at CD. Fig. 1 is a vertical view of Fig. 1,
and is a short form of the burner with half the outer tube removed exposing
the outside of the inner tube T which does not extend to the bottom of the
burner and the air is admitted through slots in the outer tube, two of which are
shown GG. In Fig. 1" the inner tube T extends below the outer tube-the
outside, also in this fig., of the inner tube is shown.
One or more bars, or lips, (see WWW) placed above each re-ascending com-
partment is sufficient to redistribute the mixed gases to the outlet of the burner
which may be reduced or enlarged to suit mantle and covered by a suitable top
to prevent lighting back. The mantle may be supported at the axis of, or out-
side, the burner. At Figs. 1, or 2, or 3, the combined gases (gas and air), after
ascending the central tube (or compartment) I, are divided and descend com-
partments marked J and reascend those marked K. At Fig. 1 the portions of
the gases that descend at J and J are also divided part of J gases meeting part
of Jat K and the other parts meeting in K'. At Fig. 1" the whole of the por-
tion descending at J reascends at K and likewise the portion at J at K. I
prefer not to limit myself to either one of these variations or to the number of the
descending or reascending compartments or to the length of the inner or outer
tubes.
In atmospheric gas burners moveable fans or fixed spiral blades or guides have
been used which impart to gas and air a revolving action. This is liable to check
the flow of the mixed gases more than is desirable. The object of the other
part of my invention is to impart to a current of gas, or gas and air, in an atmo-
spheric gas burner a centrifugal or revolving action with as little check to the
gases as conveniently possible. This I attain by allowing air, drawn in, to reach
the column of gas, or gas and air, in a revolving condition or practically so.
This revolving condition I obtain either by admitting the air through spiral-
like slots in the burner or by means of guides direct the air so that it strikes
the column of gas, or gas and air, tangentially, or otherwise than in a line with
the radii of the axis of the burner. Fig. 6 is a section plan of a burner showing
air guides EEEE; GGGG are air inlets. By "spiral-like slots I mean
slots having one or more sides like a spiral-see Figs. 4, and 5, at GGGGG.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is :-
1. An atmospheric gas burner with compartments in which gas and air after
ascending together its most central compartment descend one or more compart-
ments and then the bulk of the gas and air is compelled to move more or less
horizontally (but not radially) and in such a direction as to encompass or partly
encompass the central tube and then re-ascend to the top of the burner, substan-
tially as within described.
2. An atmospheric gas burner with two principal tubes, one inside the other
with descending and re-ascending compartments, formed between the two prin-

page_text: cipal tubes by means of partitions extending from the outer to the inner tubes
or nearly so, substantially as within described.
3. The upper part of an atmospheric gas burner constructed substantially as
within described.
4. An atmospheric gas burner supplied with air in one or more of the way's
substantially as within described.
Dated this Nineteenth day of January 1899.