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Патент USA US2121948

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June 28,1938.
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I
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A. BOVRLAND
7
‘2,121,948’
BURNER
Filed May 11, 1935
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ATTOR/Vfy
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Patented June28, "1938
~
2,121,943.
PATENT omen
‘ UNITED STATES
, } 2.121.948
wanna
~
" ,‘Carl A. Box-land, Chicago, 111., assignorto West- '
.ern Electric Company, Incorporated, New York,
N. >Y., a corporation or New York
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,
Application May 11, 1935, Serial No. 20.919
'1 Claims. (curse-11c)
‘
the series is'slightly longer thanthe ori?ce II ‘
This invention relates to a burner, and more
and oi considerably smaller cross-section and
In some industrial plants gas is purchased at each succeedingori?ce of each series is relatively
a price based on a maximum demand for a given longer than the preceding one, the longest ori
, 5 period and when an amount 01 gas equal to the ?ce 01 each series being the one adjacent the 5
particularly to a piloted gas‘burner.
I ‘
‘ ?xed maximum demand has been consumed, gas
periphery.
will emit gas at a‘ considerably higher velocity 10
than the outer ori?ces adjacent the periphery
‘10 different rate of ?ame propagation than the pur
chased gas, and will therefore not burn e?ec
,
~ and the velocity oi gas emitted from the inter
‘An object oi‘the present invention is to provide
an e?’ective and ei?cient burner having va wide
is range of utility.
In accordance with one embodiment of the
invention a burner is- provided having a main
?ame ori?ce ‘surrounded by a plurality of auxil
iary ?ame ori?ces from which gas issues at a
‘20 rate increasing with‘ their proximity to the main
?ame.
.
_~
.
,
_
,Qther objects and advantages will appear as
‘ , Bthe description proceeds.
A complete understanding 0! the invention
.25 may be had by referring to the following descrip
tion taken in conjunction with the accompanying
drawing,in which
> a
a
‘ Fig. 1 is a longitudinal section or a burner noz
" . zle. embodying the invention;
‘ e0 ‘ Fig. 2 is an end view or the burner nozzle
in Fig. 1;
‘Fig. 3 is a longitudinal section of a modi?ed
. form ‘or burner nozzle;
x
v t
'
I
Fig. 4 is an end view or a burner nozzle shown‘
,35-inFig.3;\
_
equal cross-section. However, the inner ori?ce
price. The generated gas, however, may-have a
. tively in some typeset burners.
.
Figs. 1 and 2 the auxiliary ori?ces I! are all or
premiumv price ‘ above the ‘maximum ‘ demand
'
I
v In the embodiment of the invention'shown in
may; be‘ generated at the plant to'avoid paying a
'
Fig. 5 is a longitudinal section or a further
modi?cation of the invention;
vening ori?ces will progressively decrease from
the inner ori?ce to the outer ori?ce oi each series.
when the main ?ame is burned from the ori?ce l5.
IS the position of the ?ame‘ will vary with the
velocity of the gas and the rate of ?ame propa
gation of the gas used. That is, with one type
of gas the ?ame I 4 may extend from its tip to '
the point where the gas issues from the ori?ce II, 20
while with a gas of a lower rate of ?ame ‘propa
gation the ?ame Il may not begin until ‘some
point spaced from the ori?ce it.‘ when the
?ame does not extend down to the ori?ce II. there
is danger that the ?ame may leave the nozzle. 25
completely andv be extinguished. To prevent such
a contingency the auxiliary ?ame ori?ces are
provided. Since the gas issues more slowly
through the‘ auxiliary ori?ces the ?ame even of
the inner ori?ce or each series may extend down 30'
to the end oi the ori?ce, and even though a gas
of a slow rate or ?ame propagation is passed
through the auxiiiary'ori?ces at a high rate, the
?ames or the outer ori?ces at least will always
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begin from immediately at the end of the ori?ce 35
_ so that there is no danger at any time that all or '
‘the ?ames will leave the nozzle and be entirely
Fig. 8 is an end viewvoi-the modi?cation or the ' extinguished. A burner of this type may be used,
1 ‘burner nozzle shown in Fig. 5;
a
.
ordinary manufactured gas ior‘certain peri- 4o
40‘ ‘Fig. 7 is a longitudinal section oi’ a still fur~ with
ods of the day and when there is danger of ex
‘ ‘ther modi?cation of the invention, and
Fig. 8 is an end view of the burner shown in, ceeding the maximum demand rate'ior the gas,
‘ ‘Fig. 7..
‘
Referring vnow more in detail to the drawing‘
the burner may be connected to a di?erent source
or gas, such as compressed lique?ed gases which
are well known on the market. tov keep the‘ cost
'7 _45 and particularly to the embodiment of the inven- _ of
operating the burner at a minimum.
‘
tion shown in Figs. 1' and 2, a conduit II is shown
Figs. 3 and 4 illustrate a modi?ed form or the
which may be directly or indirectly connected to
invention in which the burner nozzle is provided
a source of combustible gas and is usually pro
with a central aperture II for the main ?ame
vided with a valve (not shown) for regulating the which
is surrounded by a‘ plurality of radially
50 amount or gas’ supplied to a nozzle I2. The noz- _ extending
slots II. The slots I‘! are of progres
y ‘ zie I! has a central ori?ce ll of relatively short
sively
increasing
length toward the outer pe
length so as'to emit'gas at a high velocity to pro
duce a main ?ame - ll. Extending radially from riphery oi the nozzle so as to restrict the ?ow of
the ori?ce i8 is a plurality of series of auxiliary gas most at the periphery of the nozzle. The
e?ect of this will be similar to the e?'ect de-
66 ?ame ori?ces II. The innerori?ce I5 01 each of
45
,
“ .
50
55
v
2
2,121,948
scribed in connection with the embodiment of
the invention shown in Figs. 1 and 2.
Figs. 5 and 6 illustrate an embodiment oi the
invention having a central aperture II for the
main ?ame and a plurality of radially extending
apertures l9 which are all of the same length but
vary in cross-section, the apertures adjacent the
main ?ame aperture l8 being oi-largest cross
section and progressively decreasing to the aper
10 tures adjacent the periphery.
Figs. 7 and 8 illustrate an embodimentoi the
invention having a star-shaped aperture 2| which
in e?ect forms a central main ?ame ori?ce sur
rounded by a plurality of wedge-shaped slots
15 which restrict the flow of gas least adjacent the
central opening and restrict the gas most adja
and outwardly between the main burner ori?ce
and the periphery of the nozzle.
_
2. A burner comprising a nozzle having a main
?ame ori?ce, and an auxiliary ?ame ori?ce hav-_
inga uniiorm/length and converging side walls
to emit gas at a plurality oi" velocities ranging
between predetermined limits and decreasing with
the distance from the main ?ame.
v
'
3. A burner comprising a nozzle, having a main
?ame ori?ce, and an auxiliary ?ame ori?ce of 10
substantially similar length and progressively de
creasing cross-section in accordance with the dis
tance from the main ?ame.
4. A burner comprising a nozzle having a cen
tral main ?ame ori?ce and a radially extending 15
ori?ce of progressively greater restriction to emit
gas at progressively lower velocities toward the
periphery of the nozzle.
cent the periphery of the nozzle.
Each of the several burner nozzles disclosed ac
complishes a substantially similar result in main
5. A gas burner nozzle comprising a series of
20 taining the main ?ame and insuring the e?'ective ’elongated ori?ces extending radially from a com
operation of the burner with gases of various mon center, each of said ori?ces having tapered 20
rates of ?ame propagation.
side walls for causing delivery of the gas at a plu
It will be understood that the nature and em
rality of velocities decreasing uniformly with the
bodiments of the invention herein described and distance from the center of the nozzle.
25 illustrated are merely convenient, useful forms
6. A burner comprising a nozzle havinga high
of the invention and that many changes and gas velocity main burner ori?ce, and an auxiliary 25
modi?cations may be made therein without de
‘ori?ce for emitting gas at velocities decreasing
parting from the spirit and scope oi’ the inven
uniformly with the distance from the main ori?ce.
tion.
30
_
.
What is claimed is:
l. A burner comprising a nomle having a main
burner ori?ce for emitting gas at a high velocity,
and an elongated auxiliary ori?ce with a tapering
cross-section for producing an auxiliary ?ame
‘as having a gas velocity diminishing progressively
7. A gas burner comprising a cylindrical noz
zle, a main gas ori?ce through the center of. the 30
nozzle, and a series of uniformly spaced slots
extending radially from the main ori?ce and hav
ing tapered side walls, converging at the nozzle
periphery.
CARL A. BORLAND.
35
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