Improvements in Gas Burners.
Year: 1892

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by HUGH KENNEDY, of Sharpsburg, Pennsylvania,
United States of America, Blast Furnace Engineer.]
Improvements in Gas Burners.
I JAMES JOHNSON of 4 Clayton Square Liverpool in the County of Lancaster
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:-
Fig. 1 shows my improved burner in side elevation partly in vertical section on
the line I-I of Fig. 2.
Fig. 2 is a front view thercof; and
Fig. 3 is a side elevation on a smaller scale, showing a modified construction of
the mechanism for moving the burner valve.
My improved burner has been devised especially for burning blast furnace gases
in the furnaces of steam boilers, &c. Such gases are difficult to burn with economy
and good results, but by means of my improvements I am enabled to utilize their
heating qualities to the best advantage.
My invention also affords means by which the burner may be used as an efficient
device for regulating the supply of gas or if need be cutting it off altogether.
In the drawing 2 represents the combustion-chamber of a boiler furnace. The
gas from the furnace is derived from a pipe or conduit 3 the mouth of which is
faced by a plate 4 having a port or opening registering with the conduit. The
burner consists of a goose-neck pipe 5, whose delivery end is elongated in width
horizontally and is relatively narrow in vertical dimension. This pipe when in
operation enters partially a hole 6 formed in the wall of the combustion chamber,
and the hole is larger in dimension than the end of the pipe so that a considerable
vacant space is left around the latter through which the entering gas, expanding in
the opening, induces a supply of air into the furnace. The pipe 5 is carried by a
valve plate 7, which is set on the plate 4 and is movable thereon by means of a
lever 8 or other appliance. This lever S is connected with the pipe 5 by a link 9
and is provided at the bottom with a crossbar 10, adapted to engage notches in
fixed side bars 11. By pulling on the lever and when necessary shifting the cross-
bar 10 from one set of opposite notches to the next, the burner pipe and its
supporting plate may be moved as desired. In the modification shown in Figure 3
the lever is pivoted to a stationary pivot 12, and the link 9 is notched and its
notches are adapted to engage and to be shifted on a pin 13 on the lever to afford
it a greater range of action as in Fig. 1. By operating this lever as above
described, the plate 7 may be moved so that the end of the pipe shall register with
the conduit 3, and shall be adapted to receive gas therefrom, or it may be moved
back so as to disconnect the pipe from the conduit and to close the conduit by
covering it with the plate 7 and to cut off the supply of gas to the burner.
When the parts are in the position shown in Figure 1, the gas passes through
the burner pipe and through the opening 6 into the combustion chamber 2, and
being delivered from a small hole in the pipe it expands in the opening 6 and
thereby induces with strong suction a supply of air as indicated by the arrows b
The size of the opening 6 is so proportioned to the size of the delivery opening
the burner that a proper amount of air shall be induced to mingle with the gas to
cause the best result in combustion. The proportional size illustrated in the drawing
is proper to cause the entrance of sufficient volume of air to burn the gas without
any other air inlet. This is desirable because it causes the combustion to begin at
the very front of the combustion-chamber and thus supplies greater and more
rapidly acting heat to the boiler. The gas enters in a wide narrow sheet, so that it

page_text: mingles at once with the air and produces the most effective combustion, and when
ignited the wide flame passes under the boiler and affords thereto a maximum of
heat. By moving the plate 7 back on its seat as above indicated, the gas opening
may be partially or entirely cut off and the size of the flame thus regulated as may
be desired.
Divers modifications in the form and relative arrangement of the parts of the
mechanism may be made by the skilled mechanic without varying from the invention
as stated in the following claims, each of which states an item of invention
unqualified by peculiar limitations expressed in the other. Thus it will be under-
stood that I intend to claim broadly the burner having a discharge end of the shape
indicated, whether it be set on a movable valve plate or not.
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 :-
―:
First. In combination a gas-blast producing apparatus, a delivery pipe leading
therefrom of substantially as large area as the burner to which it leads, an open-
mouthed burner at the termination of the delivery pipe, wide in one dimension and
relatively thin transversely, a furnace into which said burner leads, and an air-inlet
space around the burner; substantially as and for the purposes described.
Second. The combination with a gas burner and valve-plate attached thereto, of
a shifting lever having a movable pivotal connection, as described.
Dated the 29th day of February 1892.