Improvements in Acetylene Gas Burners.
Year: 1899

page_text: Date of Application, 21st Mar., 1899-Accepted, 13th Jan., 1900
COMPLETE SPECIFICATION.
Improvements in Acetylene Gas Burners.
I, EDWARD JAMES DOLAN, of 3615, Warren 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 follow-
ing statement:-
The invention has for its objects, among others, the provision of a burner by
the use of which I can produce a flat flame having great illuminating power, the
flame being absolutely smokeless; another object of the invention is to provide
for the mixing of the gas with a suitable quantity of air to insure perfect com-
bustion and also to cool the lower gas tip and prevent combustion taking place
thereon.
I employ a tip having a slot preferably of peculiar construction as to its
dimensions and above this I arrange a cap having a combustion slot of greater
area than the lower tip, with provision for the introduction of air at a point
intermediate the two slots. The invention is as applicable to a burner with a
plurality of slots as it is to a burner having a single slot.
Other objects and advantages of the invention will hereinafter appear and the
novel features thereof will be specifically defined in the appended claims.
The invention is clearly illustrated in the accompanying drawings, which, with
the letters of reference marked thereon, form a part of this specification, and in
which;
Fig. 1 is a central vertical section through the line 1, 1 of Fig. 2.
Fig. 2 is an elevation of one of my improved burners.
Fig. 3 is a plan view of the burner.
Fig. 4 is a vertical section through a slightly modified form of burner.
Figure 5 is a plan of the cap removed.
Fig. 6 is a plan of the burner shown in Fig. 4, of which the cap seen in Fig. 5
is a part.
Fig. 7, is a central vertical section through the burner seen in Figure 4, with
the cap raised from the tip.
Fig. 8 is a perspective view of the form of cap shown in Figs. 1, 2 and 3.
detached.
Fig. 9 is a perspective view of the form of the lower tip shown in Figs. 1, 2
and 3, removed.
Fig. 10 is a central vertical section through the lower tip on the line 10-10
Fig. 1 thereof.
Reference now being had to the details of the drawings, A designates the usual
metal barrel or body portion of the burner.
B, in Figure 1, is the lower tip, formed preferably of lava. This tip is by pre-
ference of the following peculiar construction:-the slot b thereof should be of
not more than fourteen one-thousandths of an inch in width, the depth of the
slot must be less than thirty one-thousandths of an inch and the radius of the
slot must in no case exceed the three sixteenths of an inch. It will be under-
[Price 8d 1

page_text: stood that the slot is are shaped and that the term "radius of the slot" defines
the distance from the centre from which the arc is struck to the circumference
of the said arc. The slot communicates with a chamber C, with which the pas-
sages D communicate, as clearly shown in Fig. 10.
This tip, which I term the gas tip," and the slot thereof the "gas-slot," is
placed within the outer end of the part A in the usual manner.
E is the cap or seat for the flame. Its construction will be best understood
from Fig. 8. It comprises a ring portion e which is designed to embrace the
tip B as clearly shown in Figs. 1 and 2, and the arms or connections F which
join the ring to the top portion f which is preferably of the form shown and
which is provided with the arc shaped slot G which is in line with the slot of the
lower tip, but is considerably larger as clearly seen in Figs. 2 and 3. By means
of the arms F the top of the cap is raised or elevated a short distance above the
top of the lower tip and thus an air chamber or space H is provided between the
upper end of the slot of the lower tip and the under side of the slot of the cap
so that the air may be fed or introduced at a point intermediate the two slots.
This serves not only to produce a perfect smokeless flame but also to keep the
lower tip cool and prevent combustion taking place thereon.
It may be well to here mention that in constructing the tip shown in Fig. 10
in section, it is only necessary to bore the hole transversely through the tip to
form the chamber and the vertical passages bored from the under side or base of
tip to unite with the said chamber as shown. The end or ends of the transverse
opening are afterwards plugged as indicated in Fig. 10. It is however evident
that the invention is in no wise restricted to this particular form of lower tip
and that other forms may be employed.
In Figs. 4, 5, 6 and 7, I have shown how the invention may be applied to a
burner so as to increase the illuminating power of the burner by increasing the
number of flames on one tip or burner. Here the same principle is involved.
The slots in the lower tip are of the same character excepting that the tip instead
of being provided with a single slot is, in this instance shown as having four, all
of which are lettered I; these all communicate with the chamber J from which
lead the vertical passages K. As the base of the tip is necessarily increased in
size the upper end of the metal barrel or body A is provided with a horizontal
extension to receive it, as seen in Figs. 4 and 7.
a,
The cap L is of a shape conforming to that of the lower tip and is designed to
embrace the same, as shown in. Fig. 4, being provided with the arched portion
in which are the arc-shaped slots M corresponding in number and position to the
slots I of the lower tip. The base m of the cap fits within the depression N of
the lower tip as is seen in Fig. 4, and the said base is joined to the upper portion
of the cap by the arms or connections n, as best seen in Figs. 4 and 7, thus
leaving the air chamber or space 0 for the introduction of air to the space
between the slots of the lower tip and the cap, as will be readily understood.
It is evident that more or less slots may be provided in the lower tip and the
cap, so as to provide more or less flames on the one tip, as may be desired.
It is also evident that the form of tip and cap shown in Figs. 4, 5, 6, and 7,
may be made of such size as not to require an extension on the upper end of the
barrel or body, the tip being made to fit within the upper end of the ordinary
barrel or body. These and other modifications in detail I should consider within
the scope of my invention and they could be made without departing from the
spirit of the invention or sacrificing any of its advantages.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
1 claim is:-
1. The herein described method of burning acetylene gas by a smokeless flame,
which consists in introducing air at a point intermediate the egress of the gas
and the point of combustion, as set forth.

page_text: 2. The herein described method of burning acetylene gas in a flat, smokeless
flame, which consists in allowing the gas to flow through a restricted passage,
feeding air to the same before it arrives at the point of combustion, and igniting
the gas at a seat above the point of egress of the same, as set forth.
3. An acetylene gas burner comprising a tip with a gas slot and a cap with a
combustion seat, as set forth.
4. An acetylene gas burner comprising a tip with a gas slot and a cap with a
combustion seat and an air chamber below the same, as and for the purpose
specified.
5. An acetylene gas burner comprising a tip with a gas slot and an independent
cap having a slot in vertical alignment therewith and of greater area, as set
forth.
6. An acetylene gas burner comprising a tip with contracted slot, and a cap
separate from said tip and having a slot in vertical alignment with the slot of the
tip, and an air chamber beneath said slot, as and for the
purpose described.
7. An acetylene gas burner comprising a tip with gas slot, and a cap with com-
bustion slot, with an intervening space and means for introducing air to said
space, as and for the purpose specified.
8. An acetylene gas burner comprising a tip and a cap independent thereof
each having a slot in vertical alignment with each other, the slot in the cap being
of greater area than that of the tip, as set forth.
9. An acetylene gas burner comprising a tip with a gas slot of substantially
the dimensions hereinbefore specified, and a cap separate from the tip and having
a slot of greater dimensions than that of the tip, substantially as specified.
10. The herein described method of burning acetylene gas in a flat smokeless
flame, which consists in allowing the gas to How through a contracted passage
and igniting the gas at a point above the upper end of the said passage, as set
forth.
11. The herein described method of burning acetylene gas in a flat smokeless
flame, which consists in allowing the gas to flow through a contracted passage
and igniting the same upon a seat beyond the said passage, and supplying air
thereto, as set forth.
12. A burner for acetylene gas, comprising a tip with a contracted passage
and a seat above the same of greater dimensions than the passage of the tip.
13. A burner for acetylene gas, comprising a restricted passage and an enlarged
seat for combustion of the gas, as set forth.
14. A gas tip of the dimensions described, in combination with a gas chamber
intersecting at right angles the gas outlet, said chamber being of greater length
than width.
15. A burner for acetylene gas, comprising a tip with a contracted passage and
a cap with a seat and an air chamber whereby the air is introduced into the space
between the said passage and seat, as set forth.
Dated this 21st day of March 1899.
BOULT & WADE,
Agents for the Applicant.