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Патент USA US2063722

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Dec- 8, 1936- .
w. T. BRADBURY
’
2,063,722
OIL STOVE BURNER MECHANISM
Filed Sept. 29, 1934
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Walléam TB/ndbwy,
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2,063,722
Patented Dec. 8, 1936
UNITED STATES PATENT OFFICE
2,063,722
OIL STOVE BURNER MECHANISM
William T. Bradbury; Kankakee, Ill., assignor to
Florence Stove Company, Gardner, Mass, a
corporation of Massachusetts
Application September 29, 1934, Serial No. ‘746,176 . -
7 Claims. '(01. 158-42)
'
tion of a stove and showing details of construc
This invention relates to improvements in oil
stoves and particularly to a so-called wickless
type burner and the mechanism for operating the’
same.
Ordinarily, the wickless type of oil burner com
prises a bowl having a relatively deep annular
channel therein arranged to contain a supply of
fuel for immediate combustion. The height of
U!
the ?ame produced by the burner is regulated by
varying the amount of fuel in the annular chan
nel and this is generally accomplished by rais
ing or lowering the burner bowl with reference to
a constant level supply source of the fuel, the
source and the bowl being, of course, suitably
15 connected. The ultimate aim of the invention is
to provide an improved manually operable mecha
nism applied, in this instance, directly to the
burner to effect a raising or lowering of the fuel
level therein.
2
In prior devices of this character various ex
pedients have been employed to control the rais
ing and lowering of the burner, but disadvan
tageous features such as expensive construction,
slow operation, inaccuracy of adjustment and
25 tilting due to strain have been inherent in many
of these devices.
The primary object of the present invention,
therefore, is to provide a new and improved means
for adjusting the burner, which is inexpensive to
manufacture
and positive and accurate in oper-'
30. ation, and which is easily and conveniently oper
able to raise or lower the burner to any desired
position within a de?ned range of movement and
this with only a relatively small movement of
the operating handle.
'
,
A particular object of the invention is to pro
vide operating means for a burner of the fore
going character employing few parts of a simple
and inexpensive character.
40
Another object is to provide a burner mecha
nism of the foregoing character which is simply
and compactly constructed and is efficiently ar
ranged to permit ready assembly or disassembly
as required.
Another object of the invention is to provide
a burner mechanism which is characterized by
case of operation and durability of construction,
and in which the pressure for raising and lower
ing the burner is so applied as to prevent tilting
50 or twisting of the burner bowl.
Other objects and advantages will become ap
1 parent in the following description of an exem~
plary form of the invention and from the accom
‘ panying drawing, in which:
Figure l is a sectional elevation through a por
tion of the improved burner mechanism.
Fig. 2 is a sectional plan view taken substan
tially on line 2—2 of Fig. 1.
Fig. 3 is a rear elevation, partly in section, of l)
the burner mechanism.
Although the invention is susceptible of vari
ous modi?cations and alternative constructions,
I have shown and herein described in detail, the
preferred embodiment, but it is to be understood 10
that I do not thereby intend to limit the inven
tionto the speci?c form disclosed, but intend to
cover all modi?cations and alternative construc
tions falling within the spirit and scope of the
15
invention as expressed in the appended claims.
In the embodiment of the invention shown for
purposes of illustration, [9 designates an annular
burner bowl of trough-like formation mounted
for independent movement vertically with respect
to a ?xed constant level supply (not shown) and’ 20
providing seats at its upper edges for the usual
chimney unit (not shown). At‘ one side the
trough is connected by means of the usual tele
scoping pipe connection |2 with an elongated fuel
supply pipe l3 extending longitudinally of the 25
stove body and disposed rearwardly of .afront
plate M. which is rigid with and forms a part of
the main supporting frame of the stove.
To
support the burner for vertical movements, I
provide an upright standard l5 disposed central
1y 0f the burner bowl and depending into a hous
ing I6 coacting with the standard to guide the
burner as the same is raised and lowered.
The
standard also forms a part of my improved rais
ing and lowering means comprising generally a
pinion l1 ?xed upon the rear end of an operat
ing shaft I8 and coacting with a rack I9 carried
by the standard, the forward end portion of the
shaft being extended through the front plate l4
40
and provided with an operating handle 20.
The housing i6 is preferably in the form of
a substantially rectangular open faced box-like
structure formed of suitable sheet metal and com
prises a main body plate 2| provided with later
ally bent marginal upper and lower ?anges 22
and 23, respectively, and side ?anges 24 and 25,
respectively. To connect the housing I6 to the
stove framework, an L-shaped bracket 21 is con
nected by a bolt 28 to the ?ange 24 while a bolt
29 rigidly secures the bracket to the rear face of -
the front plate M. To guide the standard [5,
which is preferably of channel-shape cross sec
tion, the ?anges 22 and 23 of the housing are
provided with alin-ed guide slots 30 and 3 5, respec
tively. These slots so and. 3! are of. a shape to 55
2
2,063,722
receive the standard l5 with only a slight clear
ance to permit the same to be slidably recipro
cated therein, but preventing the standard from
tilting.
At its upper end, the standard 55 is provided
with a head 34 of substantially the same width as
the inside dimensions of the bowl id. The upper
edge of the head it has an integral horizontal
?ange 35 which is secured diametrically across
the lower face of a ?at perforated plate
rigid
with the upper inner edge of the burner bowl iii.
Lateral ?anges 36 along the edges of the stand
ard l5 follow the contours of. the head Eli and are
secured at their ends as by Welding to the op
posite lower edges of the bowl it. Thus, the
burner bowl is rigidly supported by the standard
85 and will be prevented from tilting or twisting
relative to the standard due to accidental causes
or from the weight of the superposed chimney
which is commonly supported full upon the bowl.
The weight of the burner bowl and standard is
supported primarily by the pinion i ‘i through the
rack it, and a salient feature of the invention
resides in the arrangement of the rack and pin
ion in substantially the center of, the total gravi
tational and frictional forces which must be over
come in the operation of the device. To the ac
complishment of this end, a longitudinal slot if)
is formed centrally of the body of the standard
3O 55, and the rack 59 is formed as an integral part
of one longitudinal edge of the slot. Preferably,
the standard i5 is formed of suitable sheet metal
and the slot to and rack H] are out by a simple
stamping operation, the rack being adjacent that
edge of the standard which is nearest the ex
tensible connection l2. This position of the rack
i9 is preferred because the drag on the burner
bowl it caused by the frictional contact of the
packing in stuffing box 42 which is ?tted about
40 the telescoping ends of the connection restrains
the free raising or lowering movement of the
bowl and shifts the center of operating force to
ward the one side away from the center of grav
ity of the bowl.
The pinion H, which may be stamped from
suitable sheet metal, is disposed Within the slot
49 in the plane of the body of the standard it and
has its axis at the center of gravity of. the burner
bowl and Standard. Rotation of the shaft i8 by
means of the handle 2!} will cause the pinion i‘!
to move the rack 59 up or down as desired, and
the pinion will abut the upper or lower edges of
the slot 48 at the extreme limits of movement to
which the reciprocations of the standard must
be con?ned.
In the present instance it has been found de
sirable to provide a correlated relationship of the
length of the slot 4-8 and the ratio of the rack and
pinion teeth which will permit the full raising or
lowering of the burner by merely half a turn of
the pinion ll’. Hence, the handle 2b which is
shown as a lever having an indicator point 4% at
its upper end, need be manipulated only through
an arc of 180° to cause movement of the burner
from one extreme limit to the other; and rela—
tively small movements of the handle will rapid
ly shift the burner to the desired operative posi
tion. Because of. arrangement of the pinion ii in
the plane of the body of the standard i 5 overrun
ning of the pinion relative to the rack it? will be
prevented thereby avoiding bending of the teeth.
Thus, even though the teeth of the pinion and
rack may not be formed with perfect accuracy
due to the simple stamping operation by which
they are formed, yet because of the described
arrangement theywill be maintained in proper
meshed relationship at all times.
In order to maintain the shaft H3 in a ?xed
axial relationship relative to the housing 16, a
?xed U-shaped bracket 61-3 is suitably apertured
to receive the inner end of. the shaft and provide
a bearing iii adjacent the pinion ii. The ends
of the bracket 46 are provided with laterally ex
tending ?anges 48 secured to the inner face of
the body 2% of the housing as by means of spot 10
welds 1Z9. Intermediate its ends the shaft I8 is
supported by the housing body part 2i which is
suitably apertured for the purpose and provides
a bearing for the shaft. Consequently, while the
weight of the burner bowl and standard is pri— 15
marily supported by the pinion ii and the shaft
58, the housing it will nevertheless carry this
weight through the described bearings for the
shaft.
I provide means for counteracting the weight I
of the burner and standard so as to retain the
pinion and shaft it at any given position to which
they may be adjusted by manipulation of the
handle 25}, and, in the present instance, this means
comp-rises a bowed flat spring 55 which is suit
ably apertured to freely receive the shaft. The
ends of the spring 5i abut against the outer face
of the housing body plate 2!, while a collar 52
which is held in place on the shaft 58 by suit
able means such as a cotter pin 53 provides an
abutment for the central portion of the spring.
Substantial pressure is exerted by the spring
against the collar 52 thereby forcing the shaft if!
to the right as viewed in Fig. 2 and causing the
pinion I? to bear against the bearing member 13?, 35
and the frictional contact thus established is
sufficient to maintain the desired position of the
mechanism subject to change by manipulation
of the operating handle.
For the‘ purpose of rigidifying the structure, I
provide means for supporting the fuel supply pipe
is within the housing it. Thus, the vertical
?anges 2i’; and 25 of the housing are cut away
at their lower edges to provide a clearance be~
tween the lower horizontal ?ange
and the verti
cal ?anges to form, in effect, horizontally spaced
notches 55 and 56 respectively, for snugly re
ceiving the pipe to hold the same against vertical.‘
movement. An angular bracket 5'! is secured by
bolts 58 to the inner face of the body 2i of the
housing and an outer ?ange 59 of the bracket em
braces the fuel supply pipe E3 to prevent horizon
tal movement thereof out of position within the
housing.
From the foregoing description, it will be evi- =
dent that I have provided an oil burner mecha~
nism which is simple and sturdy in construction,
inexpensive to manufacture and dependable in
operation. The parts of the mechanism are rela—
tively few in number and provide a compact read~ 60
ily assembled unit in which every element is e?‘i
ciently utilized.
I claim as my invention:
3.. In a burner mechanism of the character de
scribed. a burner bowl providing a peripheral fuel
trough
the
bottom,
and having
a member
a hollow
bridging
interior
the upper
open part of
said bowl, and a vertical sheet meta} standard
having a head portion centrally supporting said
bowl and including an upper horizontal ?ange
secured to said member, said head portion hav
ing ?anges at its side edges engaging with the
sides of said bowl and providing additional con
nection between the standard and bowl.
2. In a burner mechanism of the character 75
2,063,722
described, an annular burner bowl, and a ver
tical thin metallic standard of channel-shape ax
ially supporting said bowl near its upper margin,
the body of said standard being substantally nar
rower than said bowl and having means at its
upper end extending laterally of the body rigidly
secured to the lower margin of the bowl at dia
metrically opposite sides thereof.
3. In a stove structure of the character de
10 scribed, a substantially box-shaped housing in
cluding a vertical body plate having a pair of
spaced vertically extending lateral ?anges and
a pair of spaced horizontally extending lateral
?anges, alined guiding slots in said horizontally
15 extending ?anges, a burner and an elongated
supporting standard therefor slidably mounted
in said slots, a horizontally extending fuel sup
ply pipe connected with} said housing and having
an extensible connection with said burner, said
20 vertically extending ?anges being cut away at
their lower edges to form notches which cooper
ate with the lowermosthorizontal ?ange to en
gage said pipe and prevent relative vertical move
ment between said housing and pipe, means se
25 cured to said housing and engaging said pipe to
prevent relative horizontal movement of said
pipe, means ?xedly connecting said housing to the
stove structure, and means operable to move said
standard and burner vertically.
4. A liquid fuel stove structure comprising, in
30
combination, burner mechanism embodying a
supporting structure including a pair of substan
tially spaced horizontal plates having axially
alined apertures therein spaced rearwardly of the
forward margins of the plates and a vertical
member. rigid with said forward margins said
member including an aperture in line with the
axes of said alined apertures and havingbear
ing means rigid therewith and spaced rearwardly
40 therefrom, a burner and an elongated standard
centrally supporting said burner and slidably
mounted in said alined apertures, an elongated
element passing through the aperture in said‘
member into coacting relation near its rear end
3
relation intermediate the ends of said shaft, re
silient means bearing against said abutment with
force applied longitudinally of the shaft and
serving to create frictional resistance to rotation
in said rotary means to maintain the same and Cl
thereby said burner and standard in any given
adjusted position, and means ?xedly connecting
said supporting structure to the stove structure.
6. In a stove structure of the character de
scribed, a supporting structure ?xedly connected 10
to the stove structure, a burner and an elongated
vertical supporting standard therefor slidably
mounted in said supporting structure, a rack
formed on said standard, manually operable
means including a transversely extending rotary .
shaft and a pinion ?xed upon said shaft and en
gaging said rack to reciprocate said standard
upon rotation of said shaft, means providing a
bearing for said shaft and also a friction surface
abutment for the adjacent face of said pinion,
and means operating to maintain continuous
frictional engagement between said friction sur
face abutment and said adjacent face of said pin
ion for retaining the pinion in any given position
of adjustment against downward force exerted 25
by the weight of said, burner and said standard
until said manually operable means is operated
to rotate said shaft and said pinion.
'7. A liquid fuel stove structure comprising, in
combination, burner mechanism embodying a 30
supporting structure including a pair of substan
tially spaced horizontal plates having elongated
axially alined apertures spaced substantially rear
wardly of the forward margins of the plates, a
vertical plate rigid with said forward margins
and having an aperture axially disposed on a
line with the axes of said alined apertures, means
rigidly supported by said vertical plate and in
cluding a bearing part substantially spaced rear
wardly from the latter plate but lying'forwardly
of said alined apertures, a burner and a ?attened
elongated standard centrally supporting said
means coacting with said vertical member to
burner and slidably mounted in said alined aper
tures, a horizontally extending fuel supply pipe
connected with said supporting structure and 45
having an upwardly extending connection with
said burner, said standard having a longitudinal
slot of predetermined length and breadth and a
toothed rack on that longitudinal edge of the
slot which is nearest the axis of the gravitational
and frictional forces arising during movement of
the mechanism, a rotatable shaft having operat—
engage a substantial longitudinal portion of said
fuel pipe at a plurality of diametrically opposite
the aperture in said vertical plate and being sup
45 with said bearing means and having means on its
forward end for manually operating the same,
means ?xed upon the rear end of said element
and engaging said standard for moving the lat
ter vertically, a horizontal fuel pipe lying for
50 wardly of the axis of said standard and having
an upright extensible connection with said burner,
55 sides thereof to prevent relative horizontal or ver
tical movement between the pipe and said sup
porting structure during operation of the mecha
nism, and means ?xedly connecting said support
ing structure to the stove structure.
5. In a stove structure of the character de
60
scribed, a supporting structure including verti
cally spaced guiding elements, a burner and an
elongated vertical supporting standard slidably
mounted in said guiding elements, rotary means
65 including an elongated shaft and an element in
engagement with said shaft and operable to im
part reciprocal movement to said burner and
standard, a stationary abutment in vaxially ?xed
ing means on its forward end and passing through
ported near its rear end by said bearing part, 55
the extreme rear end of said shaft extending into
said longitudinal slot in the standard and having
a coaxial pinion rigid thereon lying in the plane
of said standard and meshing with said rack for
moving the standard vertically upon rotation of 60
the shaft, said pinion being stopped by engage
ment with the respective opposite ends of the slot
after a partial revolution in either direction so
as to: limit vertical movement of said standard,
and means ?xedly connecting said supporting
structure to the stove structure.
WILLIAM T. BRADBURY.
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