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Патент USA US3091292

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May 28, 1963
2 Sheets-Sheet 1
Filed March 8, 1960
.Wdolf J. Burku‘n
May 28, 1963
Filed March 8, 1960
2 Sheets-Sheet 2
as) ‘_' 6
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94do1f J. Burkh'n
United States Patent 0 ”
Adolf J. Burklin, Milwaukee, Wis., assignor to A. O.
Smith Corporation, Milwaukee, Wis., a corporation of
New York
Filed Mar. 8, 1960, Ser. No. 13,599
5 Claims. (Cl. 158-406)
Patented May 28, 1963
seat 5 of the manifold. A plurality of nozzles 6 are
threaded into holes 4 and the heads 7 of the nozzles
project a distance above seat 5, as shown in FIG. 2, and
act as gas discharge spuds.
A cup-like member 8 is supported above the manifold
by a plurality of screws 9 which are threaded into suitable
openings in the bottom of member 8 and rest on seat 5.
The screws 9 act to establish and maintain the bottom
surface of member 8 in parallel alignment with manifold
This invention is directed to a gas burner adapted for
10 1 and at a determined distance thereabove. A bolt 10
use with ?uid heaters and boilers.
extends through the central portion of frame 2. Bolt
The burner of the invention includes a circular mani—
10 acts with screws 9 to maintain the desired horizontal
fold having a series of gas outlets or spuds located in
vertical alignment of member 8 with respect to mani
spaced relation on the upper surface of the manifold. A
fold 1.
pair of concentric rings are mounted slightly above the
A plurality of openings 11 are disposed in the UULLUuI.
manifold in a manner whereby the annular chamber 15
formed between the concentric rings is in vertical align
ment with the row of gas outlets. The burner has been
found to give best results when the height and width of
of member 8 and are spaced substantially inside the in
ner circumference of gas manifold 1. Openings 11 act
to maintain a continuous upward ?ow of secondary air
through cup-like member 8 to insure complete combustion
the chamber are in a ratio of approximately 7 to 1. The
at the ?ame ignition port.
space between the manifold and concentric rings acts as
The wall 12 of member 8 is in vertical alignment with
the primary air intake while the annular chamber serves
seat 5 and the outermost surface of wall 12 is spaced
to mix the air and gas. The upper ends of the concen
radially inward of the ring formed by the circumferential
tric rings form a ?ame ignition port.
spaced burner nozzles 6 on seat 5. The uppermost
In certain instances where a higher BTU input and port
load increase is desired, a corrugated metal sheet may be 25 peripheral edge 13 of member 8 is outwardly ?ared to
direct the course and shape of the burner ?ame.
disposed within the annular chamber in a manner where
An elongated ring 14 is spaced radially outwardly of
by the passages formed by the corrugation and the con
12 of member 8 providing an annular mixing cham
centric rings are vertically aligned with the spuds in the
ber 15 therebetween. The annular chamber 15 is located
manifold. The addition of the corrugated strip will per
in vertical alignment with the ring formed by the nozzles
mit an increase in the maximum width of the annular
6. To give the best burning characteristics, the height
chamber obtainable without incurring the danger of
and width of annular chamber 15 are preferred to be in
?ashback at the spuds. Flashback normally is caused by
a ratio of approximately 7 to 1.
a turbulence in the mixing chamber of the unguided gases
The lower peripheral edge 16 of ring 14 is outwardly
when the width of the annular chamber exceeds 9/16 of an
?ared and the upper peripheral edge 17 of the ring is also
?ared outwardly and is generally in parallel alignment
The burner may be constructed in a circular or in-line
with the ?ared edge 13 of wall 12 and together with the
shape. The latter shape will permit higher BTU input
wall acts to form the ?ame ignition point or loading port
rating than the former for a given external width of the
18. The angle and radius of the ?ared edges 13 and 17
unit. By using the in-line burner shape, a commercially
is determinative of the shape of the ?ame.
practical heater having a high input rating can be con
To vary the spacing of loading port 18 and to main
structed since the narrow width of such ‘a heater enables
the alignment and spacing between member 8 and
it to pass through a standard size doorway.
14, the ring is formed with spaced, vertical slots 19
Other objects and advantages of the invention will ap
and a plurality of bolts 20 are disposed in slots 19 and
pear in the course of the following description.
The drawings furnished herewith illustrate the best 45 extend through aligned openings in the wall 12 of mem
ber 8. Spacers 21 are carried by the bolts 20 and are
modes presently contemplated of carrying out the inven
disposed between wall 12 and ring 14 and act to seal
tion as hereinafter set forth.
In the drawings:
FIGURE 1 is a plan view of a circular form of gas
burner constructed in accordance with the present in
FIG. 2 is a transverse sectional view taken on the line
2—2 of FIGURE 1;
slots 19 and to maintain the radial spacing of these mem
The annular chamber 15 constitutes a mixing chamber
for the combustible gas and air. As seen in FIG. 2, the
mixing chamber is disposed vertically above the ring
formed by the plurality of gas discharge nozzles 6 and the
space 22 between the bottom of chamber 15 and seat 5
FIG. 3 is a side elevation of a circular form of gas
the primary air intake.
burner with parts broken away showing a modi?ed form 55 is Gas
is discharged from spuds 6 and unites at primary
of the invention;
22 with air, and both pass into annular mixing
FIG. 4 is an enlarged fragmentary top plan view with
chamber 15. The gas and air mixture is ejected at load
parts broken away showing the FIG. 3 modi?cation of
the invention;
FIG. 5 is a side elevation of an in-line form of gas 60
burner constructed in accordance with the present inven
ing port 18 where ignition takes place.
Under conditions requiring a greater rate of input such
as would necessitate a space between wall 12 of member
8 and ring 14 in excess of approximately 5/16 of an inch,
it has been found desirable to employ a corrugated mem
FIG. 6 is a cross-sectional view taken on the line 6—-6
ber 23 within chamber 15. This, as shown in FIGS. 3
of FIG. 5.
and 4, assures that sufficient air and gas is fed into the
As is best observed in FIG. 1 and FIG. 2, the burner
loading port 18 and avoids back?ash of the ?ame at
includes a generally circular gas manifold 1 which acts
nozzles 6 due to mixing chamber turbulence caused by
both in the capacity of gas supplier and base of the burner
tion; and
structure. The manifold is provided with a central spoked
the unguided mixing of gases.
As may be best seen in FIG. 4, the corrugated mem
Gas is supplied to the manifold 1 through an inlet 70 ber 23 is vertically disposed within chamber 15 whereby
a series of vertical passages 24 are formed by each cor
passage 3 and is discharged through a series of spaced
rugation with either the wall 12 or the ring 14. Each
holes 4 formed in the generally ?at upper surface or
frame 2.
passage 24 is disposed directly above a gas discharge
spud ‘6. A plurality of elongated non-functioning tubes
25 are secured to seat 5 and extend upwardly into en
gagement with the lower edge of corrugated member 23.
The tubes 25 act to properly align each passage 24 above
the respective spud 6.
the degree of mixing of gas and air and combustion of
the gas at the loading port. The bolts 20 disposed in the
slots 19 may be adjusted to vary the cross sectional area
of the loading port.
Various modes of carrying out the invention are con
templated as being within the scope of the following claims
FIGS. 5 and 6 illustrate an in-line modi?cation of the
particularly pointing out and distinctly claiming the sub
previously described circular burner. This in-line em
ject matter which is regarded as the invention.
bodiment of the burner includes a generally straight gas
I claim:
manifold .26 having an inlet opening 27 and having two 10
1. A gas burner, comprising a generally straight gas
rows of spaced outlets 28 formed in the generally ?at
supply manifold having a plurality of rows of spaced gas
upper surface or seat 29 of the manifold. A plurality of
discharge ori?ces disposed in the upper surface thereof, a
discharge nozzles 30‘ are threaded into outlets 28 and the
discharge nozzle disposed in each ori?ce and projecting
heads 31 of the nozzles project a distance above seat 29
a distance above said manifold, means for supplying gas
and act as discharge jets.
15 to said manifold, a mixing member having an open top
Plate-s 32, 33, 34 and 35 are disposed vertically above
and bottom and having a plurality of mixing chambers
the seat 29 with the lower portions of the inner plates
communicating therewith, a corrugated member disposed
33 and 34 disposed in contact and the outer plates 32
in each of said chambers and de?ning in combination with
and 35 spaced from the respective inner plates to provide
said mixing member a plurality of axially spaced vertical
longitudinal chambers 36 and 3<7,which are vertically 20 passages communicating with the open top and bottom
aligned above each row of nozzles. It has been found
of said mixing member, means for locating each of said
that to obtain best results with the burner, the height
passages substantially in vertical alignment with a dis
and width of chambers 36 and 37 should be in the ap
charge nozzle, and means for spacing said mixing mem
proximate ratio of 7 to 1. The upper portion of inner
ber above said manifold to provide an air intake there
plates 33 and 34 are formed with opposed outwardly 25 between.
?ared peripheral edges 38 and 39. The outer plates 32
2. A gas burner, comprising a gas supply manifold
and 35 are formedwith opposed outwardly ?ared pe
having a gas inlet and a series of spaced gas discharge
ripheral edges 40 and 41 generally parallel to edges 38
ori?ces in the upper surface thereof, a discharge nozzle
and 139, respectively, thereby forming ?ame ignition slots
disposed in each ori?ce and projecting above said mani
or loading ports 42 and 43.
30 fold, means for supplying gas to said manifold, a pair of
A pair of end plates 44 and 45, ?anged at the bottom,
parallel plates spaced above said manifold and said plates
are secured to the end edges of plates 32, 33, 34 and 35.
being spaced apart to provide a mixing chamber there
The parallel walls of ?anged end plates 44 and 45 act to
between disposed in alignment with said discharge noz
enclose the end of the chambers 36 and 37. The ?anged
lower edge-s of the plates also act to establish and main 35 zles on said manifold, the edges of the plates above the
parallel portion thereof being disposed in spaced relation
tain the bottom surfaces of the plates 32, 33, E34 and 35
and being curved outwardly from the longitudinal axis
in parallel alignment with manifold 26 and at a deter
mined distance thereabove._
of the plates and in the same direction, means for ad
justing the spaced relationship of one of the outwardly
In order to vary the spacing of loading ports 42 and
curved edges with respect to the other outwardly curved
43 and to maintain the alignment and spacing between
edge to control the intensity, shape and direction of the
these outer plates and inner plates, a plurality of slots 46
burner ?ame, and means for maintaining said chamber
are formed in outer plates 32 and 35' and a plurality of
in alignment with said nozzles.
bolts 47 are disposed in the slots and extend through
3. A gas burner comprising an annular gas supply mani
spacers 48, which act to seal slots 46, and through aligned
fold having a gas inlet and having an annular series of
openings in the inner plates. As in the case of the cir 45 spaced gas discharge ori?ces in the upper surface thereof,
cular burner, the angle and radius of the ?ared edges 38,
a pair of concentric rings spaced radially to provide an
39, 40 and 41 is determinative of the shape of the ?ame.
annular mixing chamber therebetween and being spaced
The chambers 36 and 37 constitute a mixing chamber
above the manifold to provide an air intake between the
for the combustible gas and air. As is seen in FIG. 6,
manifold and the rings, the chamber including a cor
the mixing chambers are disposed vertically above the
rugated member disposed therein and de?ning in combi
rowsformed by the plurality of gas discharge nozzles 30
nation with the rings a series of circumferentially spaced
and the space 49‘ between the bottom of the chambers and
vertical passages, means for locating the vertical passages
seat 29‘ is the primary air intake. The functions of the
in alignment with the gas discharge ori?ces, the inner of
elements in'the in-line burner are similar to that pre
the rings having an outwardly ?ared upper edge and an
viously described relative to the circular form of burner. 55 inwardly ?ared lower edge, the outer ring having an out
Under conditions requiring a greater rate of input such
wardly ?ared upper edge disposed in substantially paral
as'would necessitate increasing the width of chambers 36
lel alignment with the ?ared upper edge of the inner ring
and 37 in excess of approximately 9756 of an inch, it has
to provide the desired angle and direction of the burner
been found desirable to employ a corrugated member in
?ame and having outwardly ?ared lower edge, means for
each of the chambers, similar to corrugated member 23 60 adjusting the distance between the ?ared upper edges of
of thei'?rst embodiment, to form vertical passages above
the inner and outer concentric rings to vary the intensity,
the spuds, thereby minimizing the gas turbulence effects
direction and shape of the burner ?ame, and means for
found in a large single chamber.
spacing the concentric rings above the manifold.
In both the circular and in-line embodiments of the
4. ‘In a gas burner, a gas supply manifold having a gas
invention, ,when the burner is in use with the supply of 65 inlet and having a series of spaced gas discharge ori?ces
gas in the manifold open, the gas will pass upwardly
in the upper surface thereof, a pair of vertically elongated
through the discharge spuds. At the primary air intake,
parallel plates spaced above said manifold, said plates be
the gas unites with airand passes into the mixing cham
ing spaced to provide a mixing chamber therebetween, a
ber. The gas and air mixture then passes through the
corrugated member disposed in said chamber and between
loading port and is ignited at its extremity. The area 70 the ends thereof, the corrugated member de?ning in com
and angle of the loading port may be adjusted to obtain
bination with said plates a series of spaced axially elon
a ?ame of desired size and shape.
gated gas mixing passages, each of said gas mixing pas
In the circular version of the burner screws 9 in the
sages being disposed above an individual gas discharge
base of the cup-like member 8 may be adjusted to vary
ori?ce and in generally axial alignment therewith to pro
the size of the primary airintake. This acts to control 75 vide means for eliminating back?ash of the burner ?ame
and excessive gas turbulence in the gas mixing passages,
and means for locating and maintaining the axially elon
direction and being disposed in generally laterally ?ared
relation with respect to the longitudinal axis of the paral
lel portions of the rings to provide the gas mixture being
discharged from the mixing passages at the ?ared edges
and ignited adjacent thereto with a desired discharge angle
and direction to promote the e?icient mixing of the gases
gated gas mixing passages in generally axial alignment
with said gas discharge ori?ces.
5. A gas burner comprising, an annular gas supply
manifold having a gas inlet adapted to be connected to a
source of supply, the manifold having an annular series
of spaced gas discharge ori?ces in the upper surface there
of, a pair of axially elongated rings disposed in concentric
relation and having elongated parallel portions, the rings
remote from the primary air intake extending in the same
with secondary air adjacent the ?ared edges.
References Cited in the ?le of this patent
being spaced radially apart to provide an annular gas mix
Machlet ______________ __ Dec. 1,
ing chamber therebetween and located above the manifold
and discharge ori?ces to provide a substantially unob
Lauhon ______________ __ Feb. 18,
Bengston _____________ __ Dec. 2,
structed primary air intake between the manifold and the
Bradshaw ____________ __ Mar. 31,
‘lowermost portions of the elongated rings, means for spac 15 1,531,840
Hall et al. ___________ __ Dec. 18,
ing the rings above the manifold, a corrugated member
Andrieux ____________ __ May 12,
positioned within the gas mixing chamber and de?ning
Kahler ______________ __ Feb. 12,
in combination with the concentric rings a series of axially
elongated gas mixing passages, means for locating each
Higley _____________ __ Mar. 22,
of the gas mixing passages above an individual discharge 20 2,559,979
Martois ______________ __ July 10,
ori?ce and in axial alignment therewith to provide means
for eliminating baek?ash of the burner ?ame and exces
sive gas turbulence in the gas mixing passages, and the
German application N 3,402, July 19, 1956.
edges of the rings above the parallel portions thereof and
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