An Improved Cooking Stove or Range.
Year: 1893

page_text: Date of Application, 13th June, 1893
Complete Specification Left, 15th Feb., 1894--Accepted, 24th Mar., 1894
PROVISIONAL SPECIFICATION.
An Improved Cooking Stove or Range.
I, CHARLES MARTIN SAMUEL ROOKE, of Jungepore, Murshedabad District,
in the Presidency of Bengal, British India, Officiating Toll-Collector, do hereby
declare the nature of this invention to be as follows:-
The object of my invention is to provide a cooking stove or range in which
the heat, which in all ordinary stoves is wasted in heating the casing of the stove,
is utilized by employing a double casing for boiling water for cooking by steam.
In my range cooking may be done by roasting, baking, boiling, frying and by
steam at the same time in different parts of the stove.
By a simple contrivance the size of the fire-place may be altered at will.
By the use of the damper half of the cooking range may be used and half the
fuel saved. In short by using my stove a saving of fuel from 25 to 50% is
made.
In my new range the casing for the bottom and the two sides consists of two
sheets of metal bent to the required shape and rivetted together about an inch or
less apart and the compartment thus formed made watertight. This is automatically
filled with water by means of a removable syphon connected with a cistern placed
alongside.
Three or four short pipes are fixed to its upper end to allow the steam generated
therein to escape. A cock to draw off the hot water when required is also fixed
to the casing.
The casing is divided into two unequal portions by means of a partition which
fits the bottom and sides of the casing but is shorter in height. The smaller
portion holds the grate and the larger the oven.
The grate is divided into two fire-places by movable plates hinged at the top
and placed a few inches apart and are kept in position by placing the lower ends
between two bars at the bottom of the grate. The size of each fire-place may be
lessened by swinging the lower ends of the hinged plates apart from each other
and enlarged by drawing saine together.
A door is fixed at the grate end of the casing to allow of the ashes &c. being
removed and of fuel being put into the fire if necessary. Such door is provided
with air slides to regulate admission of air. With the door open roasting and
toasting may be done at the fire.
A removable oven is fixed at the oven end of the casing and is held in position
by means of bolts. The oven is fitted with a pipe which extends from above the
door to the back and its outside opening is closed when required by a sliding door.
This pipe is to take off any gases generated during the process of baking.
The top of the range is covered by a top plate in three pieces resting on the
upper edge of the casing. One is fixed over the grate, and the other two are
made removable with holes for the aforesaid steam pipes to pass through, one
being placed above the oven and the other above the roasting chamber.
The heat of the fire wraps round the oven and at the same time comes in
contact with the casing thus boiling the water contained therein.
In the top plates circular holes are made and fitted with covers at convenient
places. A chimney for the escape of the smoke is placed near the door.
Cooking by the steam which issues from the pipes let into the casing is effected
by placing the utensil containing the substance to be cooked on a stand over the
pipe and covering the whole with a jacketted bell-jar.
Dated this Twenty-third day of May 1893.

page_text: E
An Improved Cooking Stove or Range.
I, CHARLES MARTIN SAMUEL ROOKE, of Jungepore Murshedabad District, in
the Presidency of Bengal, British India Officiating Toll Collector do hereby
declare the nature of this invention and in what manner the same is to be
performed; to be particularly described and ascertained in and by the following
statement:-
The object of my invention is to provide an improved cooking stove or range
adaptable for cooking by fire and in which the heat usually wasted in heating the
casing is employed to boil water for cooking by steam and for other uses.
These improvements I will now describe with reference to the accompanying
drawings in which similar letters of reference refer to similar parts throughout.
In such drawings-
Figure 1 is a plan view of the top plate of the range.
Figure 2 gives the top view of the range with the top plate removed.
Figure 3 is a section on line X X in Figure 2 and
Figure 4 is a section on line Z Z in Figure 2.
The stove or range is constructed as follows :-
Two pieces of flat bar iron A (not more than an inch in thickness) are bent to
a semicircular or other suitable shape to form the frame work for the ends of the
range. These are connected by two sheets of metal equal in length to that
required for the range; one of these sheets B being bent to fit the inner sides, and
the other C the outer sides of the said framework; the former is cut flush with
the framework and the latter projects a little beyond it.
The ends of the sheet are rivetted together, the rivets passing through the bar
irons; the upper edges of the sheets are bent horizontally and also rivetted. The
space between the two sheets-which is equal to the thickness of the flat bar irons—
must be made perfectly water tight.
The above forms what is hereinafter called the "casing."
Before finally rivetting the casing the different fixings must be attached in their
respective places as shewn hereafter.
On the top edge of the casing a hole a (in Figure 2) is made into which a pipe
is inserted. The lower end of this pipe is attached to the inner sheet of the
casing and the upper end is rolled or expanded to be flush with and fit closely
the aforesaid hole. The pipe is of such diameter as to allow the longer leg of
a syphon (hereinafter described) to slide inside it.
Two or more holes are made on each side of the top edge of the casing to
which short pipes are fitted. These tubes or pipes allow the steam to issue from
the space within the casing.
Near the bottom on one side of the casing, a cock is fitted to the outer sheet to
enable the hot water to be drawn off when required.
The syphon D above mentioned is similar to the ordinary one made of tubing
of such diameter as to slide easily into the pipe fitted in the aforesaid hole a and
is bent into the required shape. It forms the removable connection between a tub
or cistern of water and the space between the sheets of the casing (viz. the boiler)
which it keeps supplied with water.
A cistern or tub full of water is placed alongside, the syphon is then taken off
and inserted into the cistern of water till it is quite full, then the mouth of the
shorter leg of this syphon is closed with the finger. and the longer leg is inserted
into the aforesaid fixed tube and is allowed to go as low as possible into the
space between the sheets the finger being removed as soon as the mouth of the
shorter leg dips into the water in the cistern. The syphon immediately begins
acting and fills up the space between the sheets, more water if necessary being

page_text: added to the cistern as the filling goes on. The space between the sheets is thus
kept automatically supplied with water.
All that is necessary after the syphon is once drawing is to keep the cistern
alongside always filled up to the required level.
The inner or hollow side of the casing is divided into two unequal parts by a
partition E firmly fastened to the casing by means of angle irons d d.
This partition fits the sides and bottom of the casing closely but is less in height
in order to allow the draught to pass over it.
The smaller portion of the divided casing will hereinafter be called the "grating
end" and the other portion the "oven end." The draught space over the partition
is divided into two parts by a plate F fitted on to the partition so as to extend
up to the top plate hereinafter described.
One of the spaces thuis made is provided with a door G (shewn partly ajar in
Figure 2) opening towards the oven and its axle passing through the top plate is
provided with a handle e to open and close it at will.
On the grating end side of the partition the grate is placed and extends right
across the breadth of the casing the back being firmly secured to the partition by
means of angle irons d d to which the partition is fixed and the front resting on
angle irons g g attached to the casing.
The grating is to be divided into two small fire places H H by two movable
plates hinged at the top and placed a few inches apart to economise fuel.
By means of these hinged plates and the aforesaid door fitted to one of the
draught spaces over the partition either one or two small fires or one large fire
(by taking out the hinged plates altogether) can be had as required.
In order to diminish the size of the fire-place the hinged plates are swung
further apart by taking out one or more fire bars jj from each side (according
to the size of the fire-place required) and afterwards inserting on the other side
of the hinged plates thus keeping them apart. To increase the size the operations
are reversed. Of course it will be understood that the size of one fire-place only
may be altered if so desired.
The grating side is provided with a removable door K which fits against the flat
bar irons and is fastened to the casing by means of bolts or cleets.
The lower end of the door has small openings with slides to cover them for
regulating the draught admitted to the fire.
The space between the door and the grating may be fitted with arrangements
for roasting and by removing the door K roasting and toasting can be done in
front of the fire.
The oven is made of sheet metal of the same shape as the interior of the case
but is less in height and width to allow sufficient space round it for the heat to pass
between it and the casing. Its length is equal to the distance from the partition
to the end of the casing on the oven side.
Two angle irons are rivetted to the partition, one near the top and the other
near the bottom. The oven is pushed into the casing and its back abuts against
the partition while resting on the lower one it fits loosely between the aforesaid
angle irons. The other end of the oven has a door the frame of which projects
beyond the edges of the oven and abuts on the frame work of the casing resting
on the outer sheet of such casing.
The oven may be drawn out for purposes of cleaning and when replaced is kept
in position by means of cleets.
On the top of the oven a ledge shaped as shewn in Figure 2 of the drawing is
fixed extending from the door end right across the oven. This ledge is to prevent
the draught making straight for the chimney which is placed towards the
loor of the oven and to cause it to pass round the oven before making
ts escape.
A tube is fitted inside the oven along one top corner passing through the door
frame. It extends to within a couple of inches from the fire end of the oven.
Its outer mouth is provided with a sliding door to close it when required. This.

page_text: pipe is to carry away the gases generated during cooking and also to reduce the
excess of heat in the oven near the fire end.
A top plate in three pieces connected to each other is placed on the top of
the casing and rests on angle irons rivetted to the inner sheet of such casing. One
piece L is screwed over the grate and has two circular or other suitably shaped
openings over the fire for kettles, saucepans etc.
These holes are from 3 to 4 inches
apart. The space between these openings is over the aforesaid hinged plates and
may be made removable. The second piece M is placed over the roasting
chamber and has holes to allow the steam tubes to pass through. Its sides project
beyond the edges of the casing to allow the steaming arrangement (hereinafter
described) to rest upon them. The third piece N is placed over the oven and has
two or more openings along the draught channel for cooking purposes besides
holes for the aforesaid steam pipes and syphon to pass through. This top plate is
also to project beyond the top edges of the casing to correspond with the second
piece. On the under side of this piece a ledge equal in height to the space between
the plate and top of the oven is fixed to correspond with the ledge on the top of the
oven so that when the said top plate is in position, these ledges will fit closely
against one another. This top plate has a chimney placed as near the door of the
oven as possible and in such a position that the aforesaid ledge is between it and
the fire. To the opening of the chimney is fitted a damper for regulating the
draught. These top plates L, M and Ñ are made easily removable; L being
screwed as above stated and M and N being kept in position only by the pipes bb
which pass through them.
Such fuel as coal coke charcoal and the like are placed in the grate through the
openings above same. Wood fuel is admitted by removing the grating end door
and by using any other more suitable grating than that shewn in the drawings.
Before putting in the fuel the size of the grate may be altered as required.
When the fire is lit the draught passes over the partition, along the top of the
oven as far as the ledge, down one side, across the bottom, up the other side
and finally over the top of the oven, screened by the ledge, and out by the chimney.
It thus heats up the whole oven and at the same time heats the casing.
The chimney is placed near the door so that the hot air from the fire has to pass
round the oven near the door thus heating the oven evenly all over.
As the whole of the inner surface of the casing is exposed to the heat, the water
in the casing, being less than an inch deep, boils very rapidly and the steam issues
out of the tubes provided as above described.
Cooking by steam is done as follows :-
A cooking pot, containing the article to be cooked with or without a lid (at
the option of the cook) is placed on a tripod or ring with legs over one of the
steam pipes. The whole is covered by a specially constructed jacketted vessel in
the shape of a bell-jar, hereinafter described. By placing a pan or plate, with a
hole for the steam pipe to come through, under the pot the condensed steam is
collected instead of pouring over the range.
The bell-jars abovementioned are jacketted or have double casings. They are
made of thin metal (tin plate, thin copper, brass sheet or the like) being composed
of two casings with a space for air between. They are so light as to be easily
removable. By the use of these jacketted bell-jars the heat of the steam is
retained as the outside atmosphere has little or no effect on the inner case on
account of the non-conducting space. When the steam in the bell-jar becomes of
such volume as not to be contained in the same it will lift the bell-jar slightly
and escape from underneath. While cooking is done by steam the pipes not used
should be closed by light covers easily raised by any pressure of steam.
The cooking range may be placed on any suitable stand made of wood or other
suitable material.
I do not restrict myself to any size of machine or to the exact shape hereinbefore
described but claim to vary them as may be found convenient while adhering to
the principle of my invention.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a cooking range or stove the " casing" containing the grates and oven
made hollow to contain water for the purpose of cooking by steam or boiling
substantially as described and illustrated."
2. The arrangement of removable swinging plates in a grate and method above
described of altering the size of the fire-place.
3. The combination and arrangement of the various parts of a cooking range
or stove substantially as described and illustrated.
Dated this 15th day of February 1894.
JOHN C. FELL,
Agent for the Applicant.