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Патент USA US2137003

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Nov‘ 15, 1938’.
Filed July 25, 1956; '
2 Sheets-Sheet' l
M 7.8%41 ATTORNEY.
Nov. 15, 1938.
Filed July 25, 1936
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Patented Nov. 15, 1938
Harold T. Healy, Milton, Mass, assignor to The
Waverly Heating Supply 00., Boston, Mass,
a corporation of Massachusetts
Application July 25, 1936, Serial No. 92,683‘
5 Claims.
When an oil burner is installed in a cooking
range designed to use coal for fuel, it is a com
mon experience for the housewife to ?nd that
the ‘oven doesnot heat as well as it did with coal.
“5 Careful tests have shown that this is not merely
a‘ matter of bias or prejudice on the part of the
housewife,.'but this condition usually does result
in‘ such a change. ‘The present invention is
especiallycon‘cerned with this condition, and it
it) aims to devise. a thoroughly practical solution
1 It is also ‘a further object of the invention to
devise a'range which can be adjusted for these
different kinds of fuel so that by making simple
15 ‘changes, either can be used efficiently and sat
1 ‘
The‘nature of the invention will be readily
understood from the following description when
read in connection with the accompanying draw
‘PQ ings, and the-novel features will be particularly
pointed out in the appended claims.
In the drawings,
' Figure 1 Ba perspective view, partly in cross
section, of a return ?ue range embodying features
of this invention;
Fig. 2 is a front elevation of the upright ad
justable ?ue plate shown in Fig. 1;
Fig. 3 is a horizontal, diagrammatic view of
the bottom ?ue space of the range shown in
Fig. 4 is a vertical, sectional view through the
downdraft portion of the range shown in Fig. 1;
1 Fig. 5‘ is‘a view‘ similar to Fig. 4 through the
up draft or return draft‘ portion of the ?ue;
Fig. 6 is 3a perspective view on a larger scale of
the adjustable plate for the bottom flue;
Fig. 7 is a perspective view of a portion of the
main‘bottom of the range shown in Fig. 1, illus
trating the construction designed to cooperate
do with the plate shown in Fig. 6;
Fig.‘ 8 is a fragmentary; perspective view, show
ing‘a detail‘ of the end plate of the range; and
Fig. 9 is an angular view of a modi?cation.
Preliminary to a detailed description of the
.45 construction shown, it may be pointed out that my
experiments have indicated that the reason for
the‘ slow heating of an oven in a coal range, when
a‘ change is made to oil burning, is primarily due
to the fact that the oil requires a considerably
.50 smaller volume vof air ‘for e?icient combustion
than does‘ coal. The flues in the range neces
sarily are designed for the latter fuel, and they
are made of such dimensions as to give a rate of
flow or circulation of the products of combustion
55 through the flues'that guide these gaseous prod
(Cl. 126-—1) .
ucts into contact with the outer surfaces of the
oven walls that will heat the oven effectively.
When oil is substituted for coal, the smaller vol.
ume of these hot gaseous products of combustion
?ows at a slower rate through the hues, and they 5
lose their heat so rapidly to parts of the stove
other than the oven, that the latter is not heated
su?iciently. I have found that these difficulties
can be overcome by making the ?ues adjustable,
thus increasing the rate of flow of the hot gases, 10
and directing these gases into more efficient heat
ing relationship to the oven. An arrangement
designed to accomplish this result is illustrated
in the drawings.
Referring ?rst to Fig. 1, the construction there 15
shown comprises a typical range which may be
of any suitable type or design. It includes a
?re box 2, an oven 3, the usual back ?ue space
4, and bottom ?ue space 5, all of these parts
being constructed and arranged in a manner 20
common heretofore. As is well understood by
those skilled in this art, and as illustrated dia
grammatically in Fig. 3, the back ?ue space is
divided by a central partition 6 (also shown in
Fig. 7) into a down draft space A and an up 25
draft space B, and this partitition extends for
ward under the oven, thus partly dividing the
bottom ?ue so that the gases ?owing down the
flue A are compelled to travel forward under the
oven,iaround the forward end of the partition 30
6 and then back horizontally under the rearward
portion of the oven to the up draft section B of
the back ?ue, and thence across a portion of the
top of the stove and up the outlet into the stove
According to the present invention provision
is made for adjusting the cross-sectional di—
mensions of these various ?ue spaces.
Considering ?rst the down draft space A, Figs.
1, 3 and 4, in the back ?ue 4, a substantially 40
upright plate 1 is mounted in this space and pref
erably extends from the top to the bottom of it.
The lower end of this plate, when in the particu
lar position shown in Figs. 3 and 4, rests be
tween a ?ange 8, cast in the bottom plate I0 45
of the range, and two or more lugs l2—-l2 also
cast in said bottom plate and spaced su?iciently
from the ?ange to receive the plate 1. Near its
upper end this plate is provided with a lug 13
through which a hole is formed, and immediately 50
below this lug it is apertured for the passage
therethrough of an arm or lug [4, Fig. 8, integral
with the end plate l5 of the range, this lug
having two holes l6 and i1 therethrough. When
the plate is in the position shown in Fig. 4, a 55
tends through the hole IS in the lug I4, and
through the single hole in the lug 13, thus hold
ing this plate against movement either forward
or backward. Preferably, also, the top of the
producing the higher rate of circulation re
quired for the smaller volume of gases produced
in burning oil. In using the latter fuel, also, the
?ow of gases is substantially con?ned to those
portions of the ?ues closely adjacent to the
range is provided with a downwardly extending
?ange 20 behind which the upper edge of the
plate 7 is located. Similar vertical ?anges also
fer of heat to the oven is produced. In addi
tion, a better insulation of the ?ues from the
cotter pin, or some equivalent device, 18, ex
are provided to engage the upright margins of
10 the plate.
walls of the oven, so that a more e?icient trans—
outer surfaces of the range is effected when the
plates are adjusted into their shallow ?ue posi 10
tions, since an approximately dead air space is
When the plate 1 is in the position shown in
Fig. 4 it materially reduces the thickness of the provided between each adjustable ?ue plate and
back ?ue space through which the down draft ,the outer wall of the range.
While the invention has been shown in the
occurs. In other words, the thickness of this
15 space which is used, and is effective at this time,
drawings as applied to a return ?ue range, it 15
is restricted. However, by withdrawing the cot
ter pin l8 and moving the bottom of the plate ‘I
back of another pair of lugs 2l—2|, sliding the
top of this plate rearwardly and inserting the
20 cotter pin in the hole I1, the plate then is held
back substantially in contact with the end plate
will be evident that it is equally applicable to
I5 of the range, as shown in Fig. 1. In this posi
tion the effective thickness of the ?ue space is
materially increased. The plate is located in
25 the latter position for burning coal and in the
former for oil.
The same‘provision is made for adjusting the
up draft section B of the back ?ue 4, the plate
being indicated at ‘I’ in Figs. 3 and 5. The parts
30 cooperating with it to hold it in its different po
sitions of adjustment are duplicates of those in
the down draft section and certain of these parts
are indicated by the same, but primed, numerals.
Access to the cotter pin is afforded through the
35 rear holes in the top of the range which are nor
sheet ?ue ranges and other range constructions
in which special ?ue arrangements are used. The
application of the invention to such construc
tions will be obvious from the foregoing descrip 20
tion and from the drawings. Also, no attempt
has been made in the drawings to show the com
mon details of a range structure, such as the
manner in which the back, bottom and top plates
of the range are secured to each other, since these 25
details are well known and are not material to
an understanding of the present invention.
In some cases it is of advantage to ?ange the
margins of the vertical plates 1 and 1’, as indi
cated at a in Fig. 9, where the marginal portions 30
of the plate ‘I have been curved on a short ra
dius. The edges of these curved portions rest
against the stationary ?anges 8 and 20 at the
bottom and top, respectively, of the range, and
also against the side ?anges, one of which is 35
mally closed by the covers. In Fig. 5 the ad
justable plate 1' is shown in its rearward position,
this being the adjustment for burning coal.
shown at 33, thus providing a crevice or crease
When oil is used as the fuel, this plate is ad
justed into a forward position corresponding to
that in which the plate 1 is shown in Fig. 4. In
this connection it may be pointed out that the
lugs l2 and 2! may be joined into an integral
structure, as shown at 32 in Fig. 5, thus eliminat
45 ing the space between the two lugs.
While I have herein shown and described a
In essentially the same manner the effective
thickness or depth of the bottom ?ue 5 may be
adjusted. For this purpose the bottom plate [0
of the range is provided with deep and shallow
grooves 25 and 26, respectively, to receive the
downwardly projecting margins of an adjustable
plate 21, Figs. 1, 3 and 6. When the ?ange 0f
the plate is in the deep groove 25, it rests against
the bottom plate ll] of the range and the ?ue
5 at that time is of maximum depth. This is
the adjustment for coal.
When, however, the
margins of the plate 21 rest in the shallow groove
26, as shown in Fig. 4, then the depth of the
bottom ?ue is materially reduced. A bolt 28
60 holds the plate in its adjusted position, this bolt
projecting through a slot 30 in the bottom‘ plate
Ill. The upper end of the bolt and the plate may
be reached through the usual hole in the oven
bottom, this hole normally being closed by a
plate. In Fig. 3 the plate 21 is shown in its shal
low position, and the dotted lines in this ?gure
indicate the deep position of the plate in which
its margins rest in the groove 25. A similar plate
27’, Fig. 3, is located at the opposite side of the
partition 6 and is similarly adjustable.
With this arrangement the cross-sectional di
mensions of the ?ues may be adjusted to suit
the requirements of either kind of .fuel, thus ac
commodating the larger volume of gaseous prod
ucts of combustion generated in burning coal and
between these parts which may be closed by put
ty, sealing cement, or in any other convenient
typical embodiment of my invention, it will be
understood that the invention may be embodied
in other forms without departing from the spirit
or scope thereof.
Having thus described my invention, what I de 45
sire to claim as new is:
1. In a range, the combination with a ?re box,
an oven, and a back ?ue for guiding the gaseous
products of combustion along the back of the
oven, an approximately upright plate in said
back ?ue, and members projecting into said back
?ue space and cooperating with said plate to sup
port it in different spaced relations to the back
wall of the ?ue, whereby the effective thickness
of said back ?ue space can be adjusted in accord 55
ance with the requirements of different kinds of
fuel, said plate being accessible through holes in
the top of the range in order to effect said ad
2. In a range, the combination with a ?re box, 60
an oven, and a bottom ?ue for guiding the gase
ous products of combustion under the bottom of
the oven, of a plate in said ?ue provided with
marginal ?anges, the bottom of the range being
deeply grooved to receive said ?anges in one po
sition of said plate and thus to support the main
body of the plate close to the bottom of the range,
said ?anges serving also to support the main
body of said plate in a higher position when the
edges of the ?anges rest on the portion of said
bottom not so grooved, the plate in the latter po
sition reducing the effective depth of said ?ue,
and means for fastening said plate in the latter
v3. In a range, the combination with a ?re box, 75
walls of the ?ue and adjustable toward and from
an oven, and a back ?ue for guiding the gaseous
products of combustion along the back of the
oven, of an approximately upright plate in said
back ?ue, and means for supporting said plate in
di?erent spaced relations to the back wall of said
ness of said ?ue, and parts cooperating with said
plate to prevent any substantial circulation of
?ue gases through the space behind said plate.
?ue and thereby adjusting the effective thickness
of said back ?ue, said range vbeing provided with
5. In a range, the combination with a ?re box,
an oven, and a back ?ue for guiding the gaseous
?anges extending inwardly to be engaged by the
products of combustion along the back of the
oven, of an approximately upright plate in said
back ?ue, means for supporting said plate in dif 10
ferent spaced relations to the back wall of said
?ue and thereby adjusting the effective thick
ness of said back ?ue, and parts cooperating with
said plate to prevent any substantial circulation
of flue gases through the space behind the plate 15
when it is in its forward position.
margin of said plate when in its innermost po~
10 sition, and said ?anges cooperating with said
plate to prevent any substantial circulation of
?ue gases behind it.
4. In a range, the combination with a ?re box,
an oven and a ?ue for guiding the gaseous prod
ucts of combustion created in the ?re box into
heating relationship to said oven, of a plate in
said ?ue extending approximately parallel to the
one of said walls to change the effective thick
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