Improvements in Bunsen Burners.
Year: 1896

page_text: Date of Application, 6th Oct., 1896-Accepted, 13th Feb., 1897
COMPLETE SPECIFICATION.
Improvements in Bunsen Burners.
I, SIDNEY MASON, of 13:0 Spruce Street, Philadelphia, in the County of
Philadelphia, and State of Pennsylvania, United States of America, Gentleman, 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:-
This invention relates to Bunsen burners.
In the use of mantles rendered incandescent by heat from. burners of the kind
referred to it is desirable in order to obtain the best results, as to illumination, and
essential for the life of the mantles, that the gas and air by which the same is rendered
incandescent shall not be allowed to impinge. upon or come in contact with one part
of the mantle with more force or in larger quantities than upon the other parts, and
that the strength of the flame shall be uniform throughout.
The object of the present invention is to provide a. Bunsen burner for the described'
purpose so constructed that gas may be admitted under the same pressure and in the
same direction in different quantities by a slight manipulation of the parts. Further
the object of the invention is to provide a Bunsen burner adapted for the specified use
which shall be composed of few parts easily assembled, and shall be cheap in
construction.
The invention consists of a Bunsen burner having therein a diaphragm provided
with a series of openings symmetrically arranged and an occluding plate having a
plurality of series of openings arranged correspondingly to the openings in the
diaphragm, whereby by rotating the plate any desired number of the openings in
each of the series may be caused to register with the respective openings in the
diaphragm to admit the desired quantity of gas, or the supply of gas may be entirely
shut off. Further, the invention consists of a Bunsen burner comprising a tube
having a slot extending from the bottom thereof a short distance upward, openings
extending from the sides of the slot, a diaphragm located adjacent to the openings,
and a rotating occluding plate having an extension, the extension being received by
the openings as the plate rotates. Further the invention consists of a Bunsen burner
comprising a tube having a slot extending from its lower end a short distance upward,
side openings extending from the slot, a thimble having its upward end formed by a
diaphragm having openings therein, a lug on the thimble entering the slot in the tube,
and a rotating occluding plate having an extension, the extension entering the
openings from the slot as the plate rotates. Further, the invention consists of a
Bunsen burner comprising a tube having a slot extending from its lower end a short
distance upward, side openings extending from the slot, a thimble having its upper
end formed by a diaphragm having openings therein, a lug on the thimble entering
the slot in the tube, a rotating occluding plate having an extension, and a cap inclosing
the lower end of the tube.
The invention is illustrated in the accompanying drawing, in which:
Fig. 1 is a side elevation of a Bunsen burner constructed in accordance with my
invention.
Fig. 2 is a side view, the air shutter being removed.
Fig. 3 is a central vertical section.
Fig. 4 is a perspective view of the thimble, the top of which forms a diaphragm in
the tube.
Fig. 5 is a perspective view of the occluding plate.

page_text: and
Fig. 6 is a side view of the cap by which the lower end of the tube is inclosed,
Fig. 7 is a fragmentary sectional view showing the means of attaching the
occluding plate.
In the drawing A represents a Bunsen tube, provided near its lower end with a
series of air openings a. One of the air openings is extended entirely to the bottom
of the tube and it is provided with side openings a' a¹ for the reception of a part to
be described hereinafter. The tube A is provided with a circumferential projection a 2
designed for the support of the air shutter. B represents a thimble which is
cylindrical in form and of a diameter corresponding to the inner diameter of the
lower end of the tube A. This thimble is introduced into the lower end of the tube
and its upward movement is limited by a rim b, at its lower end. The upper end of
the thimble is closed by a plate b2 in which are openings 63 of any desired number,
preferably three. These openings are symmetrically arranged and may be of any
convenient size. Attached to the upper face of the diaphragm is an occluding plate.C
which is attached to the diaphragm by a screw c, and a nut c passing through the
diaphragm and the plate. Interposed between the nut and the inner face of the
diaphragm is a spring washer c2 which by its resiliency, when the parts are in place
exerts a pressure to retain the diaphragm and the plate in close contact thus preventing
escape of gas between them. The occluding plate is provided with an extension C
which may if desired extend directly outward, or as shown in the drawing, first
outward, then downward and then again outward forming a handle for grasping in
rotating the occluding plate on the diaphragm. The occluding plate is provided with
a plurality of series of small openings c 3 which are arranged on the plate in positions
corresponding to the position of the openings in the diaphragm, there being in the
occluding plate a space between each series of openings corresponding to the length
of the openings in the diaphragm, thus permitting the turning of the occluding plate
to cause the minimum or maximum number of openings in euch series to register
with the respective openings in the diaphragm, or to entirely close the openings in
the diaphragm.
I prefer the utilization of the illustrated arrangement of series of small openings
in the occluding plate, for the reason that I have shown conclusively by experiment
and use that this arrangement in connection with the described diaphragm accomplishes
the purpose of my invention which is mainly to direct into the tube currents of gas
flowing upward in a straight line and in uniform quantity from the respective series
of openings. By providing as I do in this construction a single cut off face in the
diaphragm for each series of small openings in the occluding plate, I overcome the
difficulty incident to the use of an occluding face for each opening as are commonly
employed in gas cut-offs. When in the use of a cut-off plate, a hole is partially
closed by the plate the gas flowing through the openings is diverted to a greater or
less degree. By my described arrangement it will be seen that it is possible to have
this deflection in only one of the members of each of the series of openings. Again
it will be clear that when in the use of my burner the first opening is uncovered
allowing the passage therethrough of a direct upward flow of gas, and the next
opening in the series is partially uncovered, whatever deflection in the current passing
through the second hole may take place, will he corrected by coming into contact
with the current flowing through the first hole and resulting in causing the entire
amount of gas passing to proceed upward in a straight line.
The size of the separate openings in the occluding plate are preferably such that
the exposure of one opening in each series will not be sufficient for the ordinary
purposes of the burner, and that therefore at no time will there be only one opening
in each series partially opened, thereby affecting a diversion of the flow of gas
during the use of the burner.
In order that the thimble may be quickly and accurately seated in the tube it is
provided with a lug b4 of a width corresponding to the width of the air opening which
is extended to the bottom of the tube, and is of a thickness corresponding to the
thickness of the metal of the tube. The occluding plate is so mounted upon the

page_text: diaphragm that when the projection from the same is in line with the lug b4 the entire-
number of openings in each series register with the corresponding openings in the
diaphragm and therefore in assembling the parts they are placed in this position and
introduced into the tube. The projection from the occluding plate is in line with the
openings extending from one side of the air openings and therefore the complete.
turning of the plate is permitted. The lower portion of the tube A is screw threaded
and is designed to fit into a base D by which the tube is surrounded and the parts.
retained in position. The lower end of the base D is internally screw threaded and
is of a size to fit on an ordinary gas burner. The diaphragm and occluding plate are
arranged opposite the lower end of the air inlet openings and therefore the thorough
mixing of the gas as it enters the tube with air is insured.
The regulation of the quantity of air admitted to the tube is accomplished by
means of the air shutter e, provided at the lower end of the air chamber E, surrounding
the tube A.
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. A Bunson burner having therein a diaphragm provided with a series of openings
symmetrically arranged, and an occluding plate having a plurality of series of
openings arranged correspondingly to the openings in the diaphragm, whereby by
rotating the plate any desired number of the openings in each of the series may be
caused to register with the respective openings in the diaphragm to admit the desired
quantity of gas or the supply of gas may be entirely shut off, substantially as-
described.
2. A Bunsen burner comprising a tube having a slot extending from the bottom.
thereof a short distance upward, openings extending from the sides of the slot, a
diaphragm located adjacent to the openings, and a rotating occluding plate having an
extension, the extension being received by the openings, as the plate rotates,.
substantially as described.
3. A Bunsen burner comprising a tube having a slot extending from its lower end
a short distance upward, side openings extending from the slot, a thimble having its.
upward end formed by a diaphragm having openings therein, a lug on the thimble-
entering the slot in the tube, and a rotating occluding plate having an extension,.
substantially as described.
4. A Bunsen burner comprising a tube having a slot extending from its lower end
a short distance upward, side openings extending from the slot, a thimble having its.
upper end formed by a diaphragm having openings therein, a lug on the thimble
entering the slot in the tube, a rotating occluding plate having an extension, and a
cap inclosing the lower end of the tube, substantially as described.
Dated this 6th day of October 1896.
BOULT & WADE,
Agents for the Applicant.