Improvements in Cooking Ranges.
Year: 1896

page_text: Date of Application, 2nd May, 1896
Complete Specification Left, 13th Jan., 1897-Accepted, 6th Mar., 1897
Improvements in Cooking Ranges.
We, GEORGE GORDON BRODIE and JAMES DAMREL PRIOR, of The Eagle Range
and Foundry Company Limited, Catherine Street, Aston near Birmingham, in the
County of Warwick, Ironfounders do hereby declare the nature of this invention to
be as follows:-
Our invention consists of the several improvements hereinafter described in
cooking ranges, whereby the said ranges are made more efficient and economical
in use than cooking ranges of the ordinary construction and their manipulation is
simplified.
Our invention consists, first, of the arrangements or combinations hereinafter
described of the parts of the flues of the ovens of cooking ranges heated by solid
liquid or gaseous fuel, whereby increased heating surface around the oven is
obtained and perfect control of the direction of the heat either to the top or
bottom of the oven or to the hot plate is secured.
According to this part of our invention we make a vertical flue immediately at the
back of the fire brick or lining of the fire box the said flue opening into the flue
under the bottom of the oven, and we use in the top flue of the oven a fixed
horizontal division or mid-feather arranged either obliquely in, or parallel to the
sides of, the flue so as to divide the said top flue into two parts, one of the
portions communicating with the vertical back flue described and the other portion
communicating with the chimney flue. The said division or mid-feather is
provided with openings which may be completely or partially closed by regulating
dampers. By this arrangement the heat from the top fue descending the vertical
back flue, enters the bottom flue and ascending the side flue passes through the
divided portion of the top flue to the chimney.
Or a portion of the division or midfeather may be jointed near its middle so that
by changing the position of the jointed division with respect to the chimney flue
the heat may either be directed first to the bottom of the oven, or the heat first
directed under the hot plate down the side of the oven and under the bottom of
the oven and ascending the back vertical flue escapes to the chimney, which is now
in communication with the said back vertical flue.
Our invention consists further of the following arrangements for indicating the
position of the controlling sliding dampers working in the covings at the back of
the cooking range. Each damper has a stalk in front which reaches nearly to the
front of the range. On the said stalk we make a projecting rib or ribs running
diagonally across it. On the front of the slow, or other words to indicate the
an indicating plate is fixed on
and "
which are the words "fast,"
position of the damper. A lever pointer is pivoted to the indicating plate or to
the range. The front end of the lever pointer is bent upwards and the bent end
traverses in front of the indicating plate. The other end of the lever pointer is
forked or slotted or a single peg or stud the branches of the fork or stud or the
slot engaging with the rib on the damper stalk. As the damper is drawn out or
pushed in, its inclined rib bearing against the forked back or stud end of the
pivotted pointer turns the latter on its centre and causes its front end to traverse
in front of the indicating plate and indicate thereon the position of the damper.
The same result may be obtained by the use of a bell crank lever; or the
indicating plate may be pivotted and be made to traverse a fixed pointer; or a

page_text: rotating roller, or portion of a roller, carrying the words before mentioned may be
worked from the damper stalk either frictionally or by toothed gearing. Or the
same results may be obtained by the use of a disc and lever.
Our invention consists further in preventing explosions in the boilers of kitchen
ranges by constructing the manlid to act as a safety valve. According to one of the
arrangements of this part of our invention, we use with the manlid of the boiler a
bridge within the boiler the said bridge consisting of a steel spring crossing the
manlid hole, the ends of the said spring bearing against the inside of the boiler. The
said spring bridge is supported at its middle by an eye bolt screwed to the outside of
the manlid. By screwing down the bolt tightly, considerable tension is put on the
spring bridge and the manlid thereby pressed down by the said spring bridge on to
its india rubber joint or seat and the said manhole is closed steam and water tight.
On the occurrence of undue pressure within the boiler the manlid rises from its
seat by the yielding of the spring bridge and the escape of water or steam is permitted.
On the pressure within the boiler being relieved the elasticity of the spring bridge
presses down the manlid to its seat and again closes the boiler."
In another arrangement a rigid or inelastic bridge and an external coiled spring
between the upper side of the manlid and the regulating nut on the stem of the
bridge are used, the said regulating nut being screwed home on the coiled spring
until the manlid is pressed firmly to its seat. When there is undue pressure within
the boiler the coiled spring vields and permits of the opening of the manlid..
The coiled spring described may be replaced by a flat or curved blade spring.
Our invention consists further in adapting to cooking ranges the arrangement or
combination of parts hereinafter described for the purpose of ventilating the kitchen
by carrying off the smell arising from the cooking as well as for regulating the draught
in the chimney.
We fix on the face of the wall above the front of the range a hood or canopy in the
upper part of which is a horizontal perforated tube. This tube is fixed to an upright
box which is in communication with the main chimney stack. Working in the said
box is a damper or throttle valve connected with an indicator which traverses the
front of the box which carries the words "fast," "medium" and "slow" or other
words to indicate the condition under which the cooking range is working. When
the damper is closed the indicator points to the word "fast" when the damper is
open, the indicator points to the word "slow"; and when the damper is in mid-
position the indicator points to the word "medium."
By admitting air through the perforated tube described it passes into the chimney
flue and the smell from the cooking range is carried away and the draught of
the main chimney can be regulated by admitting more or less air into it.
Our invention consists further in constructing the hollow perforated linings of the
fire boxes of cooking ranges in two parts as hereinafter described instead of in one
part as usual. We make the lower part of the lining of soft iron and hollow, the
thickest part on the face being nearest the fire. On the back of this part of the
lining are projecting gills, studs or other projections. The upper part of the lining
is made of chilled iron or hard iron and is separate from the lower part, the said
upper part being perforated with horizontal, diagonal or vertical slits or holes tapering
from the front to the inside of the lining. The air in its passage through the lining
is heated and is delivered into the fire through the slits or holes at its upper part.
The two parts of the lining are fitted together and fixed in position by screws or
other fastenings.
As the upper part of the lining is made detachable and is the only part that wears
rapidly away it can be easily removed when necessary and a new one fitted upon the
old lower part. To prevent the rapid burning away of the upper part it is made as
before stated of hard or chilled iron. Although we prefer to make the lining in two
separable parts as described, it may be made in more than two parts.
Dadh: S
CM 1800
W. T. WHITEMAN,
Agent for the Applicants.

page_text: Improvements in Cooking Ranges.
We, GEORGE GORDON BRODIE and JAMES DAMREL PRIOR, of The Eagle Range
and Foundry Company Limited, Catherine Street Aston, near Birmingham in the
County of Warwick, Ironfounders do hereby declare the nature of our invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
Our invention consists of the several improvements hereinafter described in cooking
ranges, whereby the said ranges are made more efficient and economical in use than
cooking ranges of the ordinary construction and their manipulation is simplified.
Our invention consists first of the arrangements or combinations hereinafter
described of the parts of the flues of the ovens of cooking ranges heated by solid,
liquid or gaseous fuel, whereby increased heating surface around the oven is obtained
and perfect control of the direction of the heat either to the top or bottom of the oven
or to the hot plate is secured.
According to this part of our invention we make a vertical flue immediately at
the back of the fire brick or lining of the fire box the said flue opening into the flue
under the bottom of the oven and we use in the top flue of the oven a fixed division
or midfeather arranged preferably obliquely in, or parallel to the sides of, the flue,
so as to partly divide the said top flue into two parts. The said fixed division or
mid-feather is provided with openings which may be completely or partially closed
by a regulating damper. In combination with the said fixed division or milfeather
we use a division or mid-feather jointed near its middle so that by changing the
position of the jointed division with respect to the chimney flue the heat may either
be directed first to the hottom of the oven, or the heat first directed under the hot
plate down the side of the oven and under the bottom of the oven and ascending the
back vertical flue escapes to the chimney, which is now in communication with the
said back vertical flue.
This part of our invention is illustrated in Figures 1, 2, 3 and 4 of the accompanying
drawings.
Figure 1 represents in plan the part of the hot plate of a cooking range situated
over one of the ovens of the same, and Figure 2 represents the same with the hot
plate removed.
Figure 3 is a vertical section of a portion of the oven taken on the dotted line XX
Figure 1, and Figure 4 represents a portion of the oven in front elevation.
The same letters of reference indicate the same parts in Figures 1, 2, 3 and 4 of
the drawings.
In carrying this part of our invention into effect we provide the ovens with a flue
running completely round the ovens, the said flue of each oven commencing at the
back of the fire brick lining of the fire box a and passing vertically down the near
side of the oven (this part of the flue is hereinafter called the side flue 6) enters the
horizontal part of the flue under the bottom of the oven (hereinafter called the
bottom flue) and continues up the distant side of the oven (which part is hereinafter
called the back flue 6) and terminates in a horizontal flue 63 which opens into the
vertical flue A communicating with the chimney.
The top flue is so divided by a vertical division or web d', d, that the heated
air and products of combustion from the fire box a of the range may be made to pass
either through the top flue 6 down the back flue 6 along the bottom flue and up
the side flue to the top flue 63 and thence to the flue or chimney A; or first down
the side flue b through the bottom flue, up the back Blue into the top flue * and
thence to the chimney A; or the said top flue 63 may be so opened that the heated
air and products of combustion instead of passing around the oven may be allowed to

page_text: escape directly into the vertical flue or chimney A. The said division or web d¹, d, d²
consists of a fixed part d and two jointed parts d', d².
The jointed part d' has a vertical axis e and is turned by a detachable key inserted
in the keyhole in the top of the hot plate g from the full line position into the
dotted position Figure 2 or the reverse; or into an intermediate position. The
jointed part of the vertical division is capable of turning on the horizontal axis h
so as to partially or fully open the part d' of the vertical division or web when the
jointed part d² is in the full line position Figure 2. The jointed part d' is provided
with a handle and indicator i.
By these means a perfect or nearly perfect control in the direction of the hot air
and products of combustion from the fire box is obtained. For example when it is
desired in circulating the heated air and products of combustion through the flues
around the oven to first pass the heated air under the bottom of the oven, the jointed
part, a of the vertical division or web is made to occupy the full line position
represented in Figure 2 and the valve on the jointed division b' is closed. The
heated air and products of combustion then pass first down the side flue 6 as
indicated by the full line arrows, through the bottom flne, up the back flue b² and
across that part of the top flue 63 communicating with the vertical or chimney
flue A.
When it is desired that the heated air and products of combustion should first pass
under the hot plate and afterwards under the bottom of the oven before escaping into
the flue A, communicating with the chimney, the jointed part d' of the vertical
division or web is turned into the dotted position indicated in Figure 2. The heated
air and products of combustion consequently pass, as indicated by the dotted arrows,
first through the top flue 68; down the back flue 63; through the bottom flue and up
the side flue b into that part of the top flue 63 communicating with the flue A of the
chimney.
By opening partially or fully the division or valve d', when the division d' is in
the position represented in full lines in Figure 2, the heated air and products of
combustion are made partly to take the course indicated by the full line arrows and
partly the course indicated by the dotted arrows.
When it is not desired to heat the oven the jointed division d² is turned into mid
position, that is, a position at right. angles with the front of the range when the top
flue 6s is in direct communication with the flue A of the chimney.
Although we prefer to use the jointed part, flap or valve d yet we wish it to be
understood that it may be dispensed with the fixed part d of the vertical division
extending in that case to the front of the range.
Our invention consists further of the following arrangements for indicating the
position of the controlling sliding dampers working in the covings at the back of
the cooking range. Each damper has a stalk in front which reaches nearly to the
front of the range. On the said stalk we make a projecting rib or ribs running
diagonally across it. On the front of the range an indicating plate is fixed on which
are the words "fast," "medium" and "slow" or other words to indicate the position
of the damper. A lever pointer is pivoted to the indicating plate or to the range.
The front end of the lever pointer is bent upwards and the bent end traverses in front
of the indicating plate. The other end of the lever pointer is forked or slotted or
provided with studs the branches of the fork, the studs or the slot, engaging with
the rib on the damper stalk. As the damper is drawn out or pushed in, its inclined
rib bearing against the forked back or stud end of the pivoted pointer turns the latter
on its centre and causes its front end to traverse in front of the indicating plate and
indicate thereon the position of the damper.
This part of our invention is illustrated in Figures 5, 6, 7, 8, 9, 10 and 11 of the
drawings, Figure 5 representing the indicating mechanism in longitudinal section
with the sliding damper in its withdrawn position; Figure 6 a front elevation of
the same; Figure 7 a plan of the same and Figure 8 a portion of Figure 7 with the
indicating plate removed; Figure 9 is a cross section of the dampar stalk and the
guide box in which it works; Figure 10 shows the damper stalk and Figure 11

page_text: the lever pointer detached. The same letters of reference indicate the same parts in
Figures 5 to 11 both inclusive.
a is the sliding damper working in the coving b at the back of the cooking range;
and a is the stalk of the said damper provided on its upper side with a projecting
diagonal rib (or ribs) c; d is the indicating plate at the front of the range fixed at
its back to the guide box e in which the stalk of the damper works. The said
indicating plated carries the words "fast," "medium" and "slow" or other words
to indicate the position of the damper; f is the lever pointer pivoted at f to the
indicating plate d. The front end of the said lever is bent upwards and the bent end
traverses in front of the indicating plate d, and the inner or back end of the said lever
is provided with studs f, 3 (or their equivalents) which engage with the diagonal
rib c on the damper stalk a³ as best seen in Figure 8. When the damper a is in its
withdrawn position the lever pointer occupies the position represented that is, its
bent end is situated opposite the word "slow on the indicating plate d.
When the sliding damper a is in its fully pushed in position as indicated in dotted
lines Figure 7, so as to close the flue, the lever pointer is brought opposite the
word "fast" and when the sliding damper is in an intermediate position, the lever
pointer is brought opposite the word "medium."
These positions of the lever pointer are automatically effected on the drawing out
or pushing in of the damper by the inclined rib c on the damper stalk a³ bearing
against the studded end of the lever pointer fand turning the said lever pointer
on its centre and causing it to traverse the front of the indicating plate d as will be
understood by an examination of Figures 7 and 8.
Our invention consists further in preventing explosions in the boilers of kitchen
or cooking ranges by constructing the manlid to act as a safety valve. According to
one of the arrangements of this part of our invention, we provide the manlid of the
boiler with an india rubber or elastic seat and use with the said manlid a bridge
within the boiler the said bridge consisting of a steel spring or elastic bar crossing
the manlid hole, the ends of the said elastic har or bridge bearing against the inside
of the boiler. The said elastic bar or bridge is supported at its middle by an eye bolt
passing through a hole in the manlid the screw nut of the said bolt bearing on the
outside of the manlid. By screwing down the nut on the eye bolt considerable
tension is put on the elastic bar or bridge, the manlid being thereby pressed or
pulled down on to its india rubber joint or seat and a steam and water tight junction
between the manlid and boiler formed.
On the occurrence of undue pressure within the boiler the manlid rises from its
seat by the yielding of the elastic bar or bridge and the escape of water or steam is
permitted. On the pressure within the hoiler being relieved the elasticity of the bar
or bridge pulls down the manlid to its seat and again closes the boiler.
This arrangement of our invention is represented in isometric perspective in Figure 12,
in cross section in Figures 13 and 14 (the manlid being closed in Figure 13 and
opened by the internal pressure of the steam in Figure 14) and Figure 15 represents
a longitudinal section of the boiler; Figures 16, 17, 18 and 19 represent a modifi-
cation of the safety valve apparatus of the said boiler hereinafter described.
The same letters of reference indicate the same parts in Figures 12 to 19 both
inclusive.
a is the boiler and 6 the manlid of the same. The said manlid 6 is provided with an
elastic seat by the introduction of an india rubber ring c between the edge of the manlid
and the edge of the manhole in the boiler. Situated within the boiler and crossing the
manhole is the concave elastic bar or bridge d the ends of which take a bearing against
the underside of the top plate of the boiler. The elastic bar or bridge is supported by
the eye bolt e and screw nut f and a steam tight joint for the manlid b is obtained by
screwing the screw nut e home with such force that the concave elastic bar or
bridge d is made to slightly yield, the manlid 6 being thereby pulled on to its seat
with such force as to greatly squeeze or compress the elastic ring c (see
Figures 13 and 15) and thus form a steam tight joint for the manlid h. It will be
seen by reference to Figure 14 that should the internal pressure of the steam within

page_text: the boiler exceed the tension on the elastic bar or bridge d, the said bridge d will
further yield, the manlid being thereby raised from its seat as represented in the
said Figure 14 to permit of the escape of steam. On the pressure of the steam
being relieved the elastic bridge d resumes its normal shape and automatically closes
the manlid again as seen in Figures 13 and 15.
In another arrangement, a rigid or inelastic bridge and an external coiled spring
between the upper side of the manlid and the regulating nut on the stem of the
bridge are used, the said regulating nut being screwed home on the coiled spring
until the manlid is pressed firmly to its seat. When there is undue pressure within
the boiler the coiled spring yields and permits of the opening of the manlid.
This modification is represented in Figures 16, 17, 18 and 19.
The bridge d is rigid and has at its middle the projecting screw pin d². Between
the screw nut on the said screw pin d and the top of the manlid b is the strong
coiled spring which preserves the manlid closed so long as the pressure of the steam
within the boiler is less than that of the said coiled spring g. Should the pressure of
the steam within the boiler exceed the pressure of the spring g the manlid 6 will
automatically open, the spring 9 being thereby compressed as represented in
Figure 18, and the steam permitted to escape. The coiled spring 9 may be replaced
by a flat or curved blade spring.
Our invention consists further in adapting to cooking ranges the arrangement or
-combination of parts hereinafter described for the purpose of ventilating the kitchen
by carrying off the smell arising from the cooking as well as for regulating the
draught in the chimney.
We fix on the face of the wall above the front of the range, a hood or canopy in
the upper part of which is a horizontal perforated tube. This tube is fixed to and
opens into an upright box which is in communication with the main chimney stack.
Working in the said box is a damper or throttle valve connected with an indicator,
which traverses the front of the box which carries the words "fast," "medium
and "slow," or other words to indicate the condition under which the cooking
range is working. This damper or valve may either be moved by hand or be
automatic. When the damper is closed the indicator points to the word "fast";
when the damper is open, the indicator points to the word "slow," and when the
damper is in midposition the indicator points to the word "medium."
By admitting air through the perforated tube described it passes into the
chimney flue and the smell from the cooking range is carried away and the draught
of the main chimney can be regulated by admitting more or less air into it.
This part of our invention is illustrated in Figures 20, 21, 22, 23 and 24 of the
accompanying drawings; Figure 20 representing in front elevation, the ventilating
and air controlling arrangement; Figure 21 the same in cross section taken through
the hood or canopy and perforated tube and Figure 22 the same in cross section
taken through the hood or canopy and damper or valve box;
Figure 23 represents a front elevation of the apparatus with the canopy removed
for the purpose of the better exhibiting the perforated tube; and
Figure 24 represents in front elevation, side elevation and back elevation the
damper or valve box detached.
The same letters of reference indicate the same parts in Figures 20, 21, 22, 23
and 24.
Fixed to the front of the wall a above the range, is a hood or canopy 6 under the
upper part of which is a horizontal perforated tube c. The middle of the said tube c
is fixed to and opens into the upright damper or valve box d which box by means of
the opening e in the angle plate of the range is in communication through the
horizontal flue g with the main chimney h (see Figure 22). In the said box d is a
damper or throttle valve i by means of which the communication of the perforated
tube c with the chimney stack may be controlled and cut off. The axis of the
damper or throttle valve i, carries outside the box d, an indicator k which traverses
the index at the front of the said box, the said index consisting of the words "fast,"
"medium" and "slow." When the damper or valve i is closed, by the turning of

page_text: the pointer by its handle, the indicator points to the word "fast"; when the
damper or valve i is opened, so as to open the perforated tubo c to the chimney stack,
the indicator points to the word "slow" and when the damper or valve is in its
midway position, the indicator points to the word "medium." By thus admitting air
through the perforated tube c to the chimney h, when the valve or damper i is fully
or partially open, the smell from the cooking range is carried away into the said
chimney and the efficient ventilation of the kitchen thereby effected. Besides.
ventilating the kitchen the draught of the chimney can be regulated by admitting
more or less air into it by means of the valve or damper i.
Our invention consists further in constructing the hollow perforated linings of the
fire boxes of cooking ranges in two parts as hereinafter described instead of in one
part as usual. We make the lower part of the lining of soft or cast iron and hollow,
the thickest part on the face being nearest the fire. On the back of this part of the
lining are projecting gills, studs or other projections. The upper part of the lining
is made preferably of chilled iron or hard iron and is separate from the lower part,.
the said upper part being perforated with horizontal, diagonal or vertical slits or
holes tapering from the front to the inside of the lining. The air in its passage
through the lining is heated and is delivered into the fire through the slits or holes
at its upper part. The two parts of the lining are fitted together and may be fixed
in position by screws or other fastenings.
As the upper part of the lining is made detachable and is the only part that
wears rapidly away it can be easily removed when necessary and a new one fitted
upon the old lower part. To prevent the rapid burning away of the upper part it is
made as before stated of hard or chilled iron.
Figure 25 represents in isometric perspective a hollow perforated lining for the fire
box of a cooking range the said hollow lining being made in two parts according
to our invention.
Figure 26 represents a similar view to Figure 25 but with the two parts.
separated.
Figure 27 represents the inner face or half of the hollow lining cut away for
the purpose of showing the gills dividing the interior of the said lining into a series.
of vertical passages:
Figure 28 is a vertical section through the hollow lining and Figure 29 is a
cross section on the line X, X Figure 28.
a is the upper or removable hollow part of the lining made preferably of hard
or chilled iron and b is the lower or hollow part to which the upper part a is fixed.
The spaces within each of the parts a, b are divided by vertical gills or ribs,
marked respectively a², 2 into a series of vertical passages through which air
entering at the bottom of the hollow lining traverses and being heated thereby, escapes
by the series of openings c, c, c, d, d, d at and near the tops of the passages in the
hollow lining into the fire. In consequence of the lining a, b being made in two
parts the upper part a which by the action of the fire wears rapidly away may be
renewed from time to time without renewing the lower part 6 the said lower part' b
serving for several upper parts. Thus great economy is effected by the use of the.
said linings made in two parts.
b
Although we prefer to make the lining in two separable parts as described and.
illustrated we wish it to be understood that the upper part may be made in two or
more pieces. In this case the said upper part is divided vertically into two or more
pieces and fitted closely together.
Having now particularly described and ascertained the nature of our invention
and in what manner the same is to be performed we declare that we claim as
our invention of "Improvements in cooking ranges ";-
First. In cooking ranges the oven or ovens of which have a continuous flue passing
from the fire box around the said oven; arranging in the top horizontal flue or top
horizontal part of the said continuous flue a vertical division one part of which
division is so jointed and capable of being turned that the heated air and products

page_text: of combustion from the fire box in passing through the said continuous fine around
the oven to the vertical flue of the chimney, may be made either to pass first under
the hot plate and down the back flue to the bottom of the oven or first down the
side flue to the bottom of the oven, then up the back flue to the top flue under the
hot plate substantially as herein before described and illustrated in Figures 1, 2, 3 and 4
of the accompanying drawings, whether the said jointed part of the division be used
with or without the jointed valve or flap hereinbefore described and represented.
Secondly. The arrangement or combination of parts herein before described and
illustrated in Figures to 11 both inclusive of the accompanying drawings, for
indicating the position of the sliding dampers working in the covings of the cooking
range; that is to say, making on the stalk of the damper an inclined or diagonal
projecting rib (or ribs) with which the studded forked or slotted end of a lever pointer
jointed or pivoted to the said stalk engages, the drawing out or pushing in of the
damper causing the said pivoted pointer to turn on its centre and its front end to
traverse an indicating plate at the front of the range and indicate thereon the position
of the damper substantially as described and illustrated.
Thirdly. Preventing explosions in the boilers of cooking ranges by constructing and
arranging the parts of the manlid to act as a safety valve substantially as herein-
before described and illustrated in Figures 12 to 19 both inclusive of the accompanying
drawings; that is to say, providing the manlid with an elastic packing ring or
joint and maintaining the said manlid on the said elastic packing ring or joint by
the tension of an elastic or yielding bridge or bar, or by a coiled or other spring
in conjunction with a rigid bridge or bar, which yielding bridge or bar or coiled
spring on undue pressure of steam within the boiler yields and thereby permits
the manlid to be partially opened by the internal pressure of the steain which
steam escaping relieves the boiler and the manlid automatically closes again
substantially as hereinbefore described and illustrated.
Fourthly. The arrangement or combination of parts hereinbefore described and
illustrated in Figures 20, 21, 22, 23 and 24 of the accompanying drawings for
ventilating the kitchen in which the cooking range is used and for regulating the
draught in the main chimney, that is, the addition to or combination with the
front of the range of a horizontal perforated tube carried by and opening into a
valve box provided with a damper or throttle valve the said valve box being in
communication with the main chimney of the range, the axis of the said damper
or valve being provided with an arm or indicator by which the position of the valve
is indicated and opened and closed for the purpose of regulating and cutting off the
supply of air to the main chimney substantially as described and illustrated.
Fifthly. Making the hollow perforated linings of the fire boxes of cooking ranges
of two or more parts fitting one on the other so that when the upper part or
parts is or are by the action of the fire worn away the said upper part or parts may
be removed without removing the lower or unworn part substantially as herein-
before described and illustrated in Figures 25, 26, 27, 28 and 29 of the accompanying
drawings.
DJAL
T
1007
GEORGE GORDON BRODIE.
JAMES DAMREL PRIOR.