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Патент USA US2132521

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Oct. 11, 1938.
Filed Dec. 26, 1934
2 Shee'ts-Sheet l
711. CUM“
Oct. 11, 1938.
Filed Dec. 26, 1934
2 Sheets-Sheet 2
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19 7 ram/[y
Patented Oct. 11, 1938
Joseph T. Voorheis, San Francisco-,Calif.
Application December 26, 1934, Serial No. 759,211
2 Claim. (Cl. 110-172)
This invention relates to a fuel burner and ; I0 indicates a wall of a furnace having a Ven
particularly pertains to a combined gas and oil
burner of the forced or natural draft type.
It is the principal object of the present inven
5 tion to provide a fuel burner which is designed
‘ for simultaneous or separate combustion of liq
uid and gaseous fuels, and which burner is pro
vided with a conveniently constructed segmental
gas burner adapted to afford maximum heat
turi shaped throat structure II. This is usually
cast of ?re clay and is here shown as being
formed with a plurality of longitudinally ex
tending ribs [3 which are tapered in thickness 5
and increased in thickness and width toward the
enlarged edge of the throat opening l4. Mounted
against the outer vertical face I5 of the furnace
mounted in a manner to permit them to be in
wall It! is a segmental gas burner ring 16. This
ring is formed of three segments as here shown, 10
one of the segments being indicated in elevation
at Fig. 5 of the drawings. Here it will be seen
dependently removed, the construction being fur
ther provided with new and novel air control and
low element l‘l having a front wall 18, a rear wall
10 radiation, thereby preventing rapid destruction
of the burner, said burner segments‘ being
15 air directing means.
The present invention contemplates the pro
vision of a burner housing carrying draft regu
lating means by which a plurality of jets of air
may be admitted ‘circumferentially of the hous
20 ing in controlled direction and volumefthe struc
ture including burner sections having cooling
skirts which form an inlet throat for the air,
the air passing through a furnace throat of
particular design acting to mix the‘ combustible
25 elements thoroughly as they pass into the fur
The invention is illustrated by way of example
in the accompanying drawings in which:
Figure'l is a view in end elevation showing
30 the face of the burner with which the present
invention is concerned with parts broken away
to disclose the vane operating mechanism.
Fig. 2 is a fragmentary view in transverse sec
tion through the vane structure and the burner
35 housing as seen on the line 2-2 of Fig. 1.
Fig. 3 is ‘a fragmentary view showing the air
vanes and their operating mechanism with the
vanes closed.
Fig. 4 is a view in central vertical section
40 through the- burner structure as seen on the
line 4—-4‘ of Fig. 1, but with the gas supply pipe
added and with which a suitable oil burner not
shown in the drawings may be used.
Fig. 5 is an enlarged fragmentary view in
45 elevation showing one of the burner segments as
seen on the line 5-5 of Fig. 4.
Fig. 6’is a view in transverse section through
one of the burner segments as seen on the line
6-6 of Fig. 5 and as showing the manner in
60 which the segments are connected with the gas
manifold. >
Fig. '7 is a view in end elevation showing the
furnace throat and more clearly disclosing one
form of ba?le ribs formed as a part thereof.
Referring more particularly to the drawings,
that the burner ring it comprises an arcuate hol
l9, and end walls 20. As shown in Fig. 4 of the 1°
drawings the front wall I8 of the burner ring I6
is continued outwardly in the form of an apron
2| which is cast integral herewith and forms a
continuation of the air finlet throat l4. The
outer ?aring edge of the apron- 2| is circumscribed by an annular gas ring 22 which is formed
with three openings 23, one for each of the seg
ments of ring I6. These openings are in the in
ner wall of the gas ring 22 and communicate
with passageways 24 formed in the rear of the
skirt of each segment, and leading to the arcuate
gas space 25 of each of the segments. The in
ner wall l8 of each of the segments is formed
with a plurality of inclined gas jet openings 26
through which gas is projected into the throat
I4 in a converging cone. The gas is supplied
from the ring 22 through the passageways 24
and a gas tight connection is made between these
members by fastening bolts 21 which engage ears
28 on the segments and pass through the gas
ring 22 in the manner shown in Fig. 6 of the
drawings. It will be seen that due to the man
ner in which the gas ring is formed in segments
and mounted within the circumscribing ring it
may be readily assembled or separated, and that
during operation the relatively thin wall of the
?aring skirt 2! would tend to materially increase
the heat radiating surface of each of the sepa
rate segments and maintain them at an oper
ating temperature which is not liable to cause 45
them to burn readily due to the intense heat gen
erated by the burner. Gaseous fuel is delivered
to the gas ring 22 through a pipe 29, the flow
being controlled by a valve 30.‘
The g s ring 22 is mounted against the face of 50
a sheet ’\ etal wall 3| of the furnace and is suitably
secured thereto. Mounted upon the gas ring is
an air ‘control and regulating structure 38 by
which air is directed into the throat of the burn
er and/A‘ y which its volume and division of its jets 55
are controlled. This structure comprises an outer
inner end projecting into the throat of the gas
wall member 34 held in spaced relation to the ring
22 by bolts 35. These bolts are suitably fastened
to the gas ring and extend horizontally'therefrom.
The outer ends of the bolts 35 project through a
face plate 36 and are held in place by nuts 31.
The wall member 34 is spaced a distance from
the end face of the gas ring 22 and provides an
annular throat 39 through which air may move
10 radially and inwardly to the throat through the
gas burner. Disposed between the vertical face
of the gas ring 22 and the wall member 34 is a
plurality of damper plates 39 each mounted to
oscillate on pins 40. These plates are made of
15 ?exible steel and swing between the faces 4| and
42, as particularly shown in Fig. 2 of the drawings.
The outer ends of each of the hinge pins 43 are
fitted with gear segments 43, all of which segments
are in mesh with a ring gear 44. The ring gear
20 may move circumferentially upon pins 45 and
when moved will simultaneously swing all of the
plates 39. One of the hinge pins 46, as indicated
in Fig. 1 at 40a, extends through the plate 46
and is there ?tted with a lever 41. This lever
is adapted to oscillate over the face of a quad
rant 48 and is ?tted with a pin 49 which may be
brought to register with one of a series of per
forations 50 in the quadrant whereby the gear
segments 43 and the ring gear 44 may be set in
80 a desired position. By this arrangement the vanes
39 may be simultaneously moved to vary the open
ings occuring between the different vanes and
also to vary the direction of these openings from
one in which air is directed radially of the struc
ture to positions where the passageways assume
different degrees of angularity with relation to
the longitudinal axis of the burner throat. In
fact the lever 41 may be moved until the various
vanes 39 assume positions shown in Fig. 3 where
40 they will be ?exed against the next adjacent plate
When the burner is used with gas as a
fuel it is delivered to the ring 22 through the pipe
29 and then to the various gas segments, and
then is discharged from the separate rings
through the jet openings 26. The jets of gas will
then be projected forwardly into the throat l4
and along paths converging toward the central
axis of the throat. Air will pass inwardly through
the air throat 33 between members 22 and 34 and 10
due to the angular positions of the blades 39 dis
posed in the path of travel of the air. The air
will tend to follow helical paths of travel through
the gas burner and through the throat l4. By
this arrangement the air will tend to intersect the 15
jets of gas projected from the openings 26 and
will insure that a ?ow of air will be provided mov
ing inwardly through the throat to support com
bustion of the gas uniformly. It will also be
evident that in the helical travel of the air 20
through the throat l4 the outermost portion of
the column of air will strike the ridges l3 of the
throat and will tend to be directed back into
the vortex of burning fuel. Attention is directed
to the fact that the lip of the throat i4 farthest
from the gas burner is formed with a horizontal
portion 13’ which will arrest the flow of air out
wardly along the surface of the throat, and di
vert it back into the ?ame of burning fuel. The
air which ?ows through the throat 33 will be
divided into inwardly moving jets by the air
control plates 39. The volume of this air may be
controlled by movement of the free ends of the
plates toward the pivoted ends of the next suc
ceeding plates. In this manner the tangential 85
relationship of the in?owing air jets may be con
trolled with regard to the longitudinal axis of the
burner. ‘In the event that it is-desired to close
the throat 33 completely against the inward pas
sage of air the plates 39 may be swung to over
pin in overlapping relation to close the ‘air inlet
throat completely. The member 46 carries a
central ring 51 which is angle shaped in cross
section, the outer angular ?ange lying against the
45 member 46 and being secured by bolts 45. The
lapping positions as shown in Fig. 3. These plates
are manipulated by the lever 41 which is set with
relation to the stop quadrant 48. As the burner
becomes heated it will be evident that the seg
ments 15 forming the ring will be raised to a high 45
degree of temperature. Under ordinary opera
wardly and is formed with a bead 52 to receive
the marginal edge 53 of a center de?ecting cone
54. This cone projects inwardly having a ?aring
55 adapted to provide a curved substantially
tion of such a burner these rings are of relatively
short life due to this temperature, but in the pres
the passageway 33 may be directed from a verti
cal direction of travel to a horizontal one through
the throat. A central hub 56 is formed as a part
low temperature, thus protecting the sections,
increasing their life, preventing warping of the
opposite ?ange portion of the ring 5| extends in
conical face by which air ?owing inwardly through
55 of the member 54 and receives a pipe 51 through
‘which a liquid fuel burner may be inserted. The
inner opened end of the pipe 51 terminates within
the area circumscribed by the annular gas ring
and the oil burner when in use will project a
conical stream of oil horizontally through the
throat of the gas ring and the throat l4 of the
furnace. A diffusing cone 59 is mounted around
the inner end of the pipe 51 and ?ares outwardly
therefrom. The outer end of this cone is open.
85 Its side wall is formed with perforations 63
through which air may pass and help support
combustion of liquid fuel and prevent formation
of carbon within cone 59.
In operation of the present invention the seg
70 ments l6 of the gas burner are assembled within
the ring 22 and secured in position by the bolts
21. Suitably mounted in spaced relation to the
ring 22 is a plate 34 combining therewith to form
an air throat 39. The oil burner supporting tube
75 51 is mounted through the member 54 with its
ent instance the skirts 2| of the ring segments
provide additional heat radiation surfaces so that 50
the segments will be maintained at a relatively
sections, and at the same time providing a proper
throat through which the air may flow into the 55
When the burner is used with oil as a fuel the
end of an oil burner or atomizer projects through
tube 51 into cone 59 and an atomized conical
spray of oil is projected through Venturi throat 60
I 4 into the furnace. The conical spray of oil has
its apex at or near the inner end of tube 59 and
the conical spray of oil just clears the ?re clay
throat l4. Air for combustion is supplied in the
same manner as described for gas fuel, and in 65
both cases results in intimate mixing of fuel and
air with quick combustion.
While I have shown the preferred form of my
invention, as now known to me, it will be under
stood that various changes may be made in the 70
combination, construction, and arrangement of
parts, by those skilled in the art, without de‘
parting from the spirit of. the invention as
Having thus described my invention, what I 75
claim and desire to secure by Letters Patent is:
1. In combination with a furnace wall having
an outwardly ?aring throat therethrough of cir
cular cross-section, a supplemental burner throat
element abutting against the wall and registering
with the throat through the wall in the plane of
smallest diameter of the throat,said burner throat
element ?aring outwardly and away from the
wall, a burner housing circumscribing the burner
throat and directing air into said throat at the
‘margin thereof whereby incoming air will be
directed from the burner throat element to the
small diameter of the throat through the fur
nace wall and the air will tend to cross the
15 throat as it passes into the furnace and will tend
to flow outwardly across the throat and against
the wall thereof, and ribs formed on the portion
of the throat within the furnace wall and having
inclined side faces whereby said air after striking
20 the wall and ribs will be directed inwardly to
ward the central axis of the throat.
2. In combination with a furnace wall having
a ?aring throat therethrough of circular cross
section, the large diameter of said throat being
within the furnace and a supplemental burner
throat element abutting against the wall and
registering with the small diameter of the throat
through the wall, said burner throat element
?aring outwardly and away from the wall where
by incoming air will be directed from the burner
throat element to the small diameter of the throat
hrough the furnace wall, a burner housing cir
cumscribing the mouth of the supplemental
throat and directing air thereinto over the mar
gin thereof whereby the air will tend to cross the
throat as it passes into the furnace, ribs extend
ing longitudinally along the wall of the throat
within the furnace wall, said ribs exending from
the small diameter of the throat and increasing in 15
thickness and in width towards the large diam
eter of the throat through the furnace wall. the
section of the ribs presenting a curved face merg
ing into the wall surface along oppositely curved
?llets, whereby said air encountering said ribs 20.
will be directed inwardly toward the central axis
of the throat.
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