Improved Cooking Apparatus.
Year: 1889

page_text: Date of Application, 8th July, 1889
Complete Specification Left, 5th May, 1890-Accepted, 8th Oct., 1890
PROVISIONAL SPECIFICATION.
Improved Cooking Apparatus.
I HENRY THOMAS COOK of 36 West Avenue Road Walthamstow in the County of
"IMPROVED
Essex Joiner do hereby declare the nature of my invention for an
COOKING APPARATUS" to be as follows:
My "Improved Cooking Apparatus or Cooker" is constructed and arranged so as
to unite on one platform all the necessary utensils for baking boiling warming grilling
and toasting, and to heat them from one source, whereby, efficiency of cooking is
attained as well as economy of fuel and labor.
There is a foundation plate of iron the purpose of which is to carry firmly all the
various parts of the apparatus. This plate is supported on legs and has a curved
recess or depression into which is fitted a tubular or marine or other suitable boiler
with a steam chest attached.
Over the front of this boiler an oven is placed surrounded by chambers or smoke
boxes and surmounted by the chimney or funnel.
The furnace of the boiler is internal and is so constructed that by means of a grating
at the back or end, it may be used for grilling or toasting purposes.
A chamber (hereinafter called the "grill chamber") is constructed around this
grating.
The heated gases from the furnace passing by this grating and returning through
the tubes of the boiler find their way through the chambers or smoke boxes surrounding
the oven, and escape by the chimney or funnel, which is fitted with a steam blast pipe
from the boiler.
One or more steam kettles are placed (preferably near the "grill chamber") on the
foundation plate and are heated by steam from the steam chest.
One or more boxes or chests are also placed on the foundation plate (preferably
near the front of the boiler) and may be used for heating or boiling things placed
therein, such boxes or chests being heated by means of steam from the steam chest.
Dated this 8th day of July 1889.
HENRY THOMAS COOK.
COMPLETE SPECIFICATION.
Improved Cooking Apparatus.
I HENRY THOMAS COOK of No. 36 West Avenue Road Walthamstow in the County
of Essex Joiner 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 :-
My improved cooking apparatus is constructed and arranged so as to unite on one
platform all the necessary utensils for baking boiling warming grilling and toasting
and to heat them from one source whereby efficiency of cooking is obtained as well as
economy of fuel and labour.
Fig. 1 is a half sectional plan of the apparatus showing the position of the various
parts of the apparatus through xx-xx Fig. 2-B is the steam chest or dome of
the boiler-C is the internal furnace of the boiler and fire-grate-E the grill
chamber, F the oven,-G the steam kettle and H the steam closets or chests.
Fig. 2 is a front view and half section through oo Fig. 1 from right to left
showing the front of boiler B-the furnace and fire grate C-the oven F,-the
two steam closets H, and the hot well B*.
Fig. 3 is a back view and half section through oo Fig. 1 showing the back

page_text: end of boiler B,-internal furnace and firegrate C,―steam kettles G,—hot well B* and
steam pump or injector B³.
Fig. 4 is a section of the apparatus through the centre from back to front x-x
in Figs. 1. 2. and 3 showing the interior of the boiler B-the furnace and firegrate C
-the grill chamber E,-and the oven F.
The above mentioned are the principal parts of the apparatus and together with the
minor details are hereinafter more particularly mentioned and described.
The apparatus has a foundation or bed plate A, of metal. This foundation or bed
plate is for the purpose of attaching or securing all the various parts of the apparatus
and is recessed to receive the boiler B. Fig. 2, 3 and 4 hereinafter mentioned and
sufficient space is left between the boiler and bed plate for the insertion of lime,
mortar, or some non-conducting substance to prevent the radiation of heat.
The foundation or bed plate A has stiffening ribs on the underside A¹ Fig. 3
and 4-Flanges are cast on the top side for fixing the various top plates or outer
casing D-steam closets or chests H-and the grill E. In each portion of the bed
or foundation plate which forms the bottom of the steam closets or chests H Fig. 1
and 2, is fixed a pipe H2 for the purpose of conducting the condensed steam from
the steam closet or chest H to the hot well or cistern B hereinafter mentioned,-pipes
are also provided for the purpose of carrying away any water falling or boiling over
from the steam kettles G, whereby it is prevented flowing under the boiler B or into
the furnace C or grill chamber E.
The bed or foundation plate A is supported on legs of metal A² Figs. 2. 3 and 4 but
if preferred may be set on brickwork.
Into the recess of the foundation or bed plate A is fixed a tubular or marine
boiler B, which is fitted with a steam chest or dome B Figs. 1. 3 and 4 for the
purpose of giving increased steam space. The boiler has an internal furnace and
firegrate C, and return tubes 132 to the smoke box B5 Figs. 1 and 4 which com-
municate directly with the flues B surrounding the oven F hereinafter mentioned and
described.
The boiler B is fitted with a steam pump or injector B3 Fig. 3 by which the supply
of water is taken from the hot well or cistern B₁ as required so as to feed the boiler
with hot water obtained by the condensation of steam in the kettles G, and closets H,
whereby incrustation is diminished and fuel economized. A back pressure valve is
placed to the feed or delivery pipe in any convenient position. On the top of the
steam chest or dome B is a safety valve B Figs. 1 3 and 4 and in connection
with the boiler B is fitted a pressure guage, water guage, blow off and steam
blast pipe into the chimney.
The internal furnace of the boiler is so constructed that the rear end () Figs. 1
and 4 opens into a box or grill chamber E hereinafter mentioned through sliding
plates or hit and miss gratings E3 Figs. 1 and 4 fixed at such rear end, and
which are opened or closed as may be required by the handle E Fig. 1.-The
hot gases from the furnace pass from C₁ through the return tubes B² heating the
water in the boiler in their passage and thence through the smoke box B' Figs. 1
and 4 hereinafter mentioned into the flues or chambers B that surrounds the oven F
to the chimney. By this means waste heat not absorbed by the water in the boiler
is utilized for the purpose of heating the oven F.
The firebars or grate in the furnace C Figs. 1 and 4 are loose and are fitted to a
frame forming the firebridge C3 Fig. 4 and the dead plate C4 Fig. 4-there is a stop
upon the back support of the firebars to prevent the bars from falling out and in
the front they are arranged so as to allow for contraction and expansion by a diagonal
bearing on the dead plate C4.
Additional flues C2 Figs. 3 and 4 are provided to the furnace which pass over the
top of the boiler B for use when needed to increase the draught in the furnace or draw
up the fire quickly. These flues are closed by a flap damper having a simple rack
arrangement for fixing them, open, close, or in any intermediate position as
required.
Surrounding the boiler is a metal casing D which forms the smoke box B³ Figs. 1

page_text: and 4 and the flues over the boiler C2 Figs. 3 and 4 and the chainber Be that
surrounds the oven F hereinafter mentioned and described. This casing has flanges
for the purpose of fixing it together and stiffening webs where required. The front
of the casing D Fig. 2 removes and gives access to the tubes B2 and the flues of the
boiler for cleaning purposes, it is fixed in position by a hooked catch at the bottom
and locked by lever handles and catches. In this removable front D¹ Fig. 2 an
opening is provided and a furnace door D2 Fig. 2 hung for stoking purposes.
At the rear of the furnace C is fixed an iron chamber E Figs. 1 and 4 for grilling
or toasting purposes which receives its heat through the aforementioned ht and miss
grating Fig. 1 and 4 from the furnace C. At the back of this chamber is placed
an iron door E Fig. 3 and 4 and on the top an inlet E2 Fig. 1 and 4 through which
the article to be grilled or toasted is inserted.
At the bottom of this chamber an outlet E Fig. 1 is provided for the purpose of
allowing fat etc. to run from the chamber through a pipe which may be carried into
a vessel placed beneath.
Over the front of the boiler B Fig. 2 and 4 and inside the iron casing D is fixed
the oven F and is so placed as to allow five sides thereof to form circulating
chambers B for the hot gases which pass through the tubes B2 from the furnace (at
such times as the damper of the flues C2 Fig. 3 and 4 over boiler are open, the
heated gases pass through them to the circulating chamber Be surrounding the
oven F.
The oven F is of sheet iron and is fixed in position by flanges to the front portion
of the outer casing D.
At the rear of the foundation plate A and on either side of the grill chamber E
Fig. 1 and 4 is fixed a steam kettle G Fig. 1 and 3 each having a cock for drawing
off the water or other liquor contained therein.
The steam kettles G Fig. 1 and 3 have an outer jacket and an inner lining of metal
thereby forming a chamber G3 Fig. 3 for the circulation of steam. In the interior of
the kettles and in communication with the chamber G³ are placed vertical tubes bent
over at the top G2 Fig. 1 and 3 through which the steam circulates.
The vertical and bent tubes are preferred as being more convenient for cleansing.
The chambers G³ are connected with the steam chest or dome B' Fig. 1. 3 and 4 of
the boiler by pipes G¹ Fig. 1 and 3 through which steam passes to the said chambers
and tubes.
The flow of steam into these chambers is regulated by a valve or cock.
Each kettle is fitted with a safety valve and has an exhaust pipe G Fig. 3 fitted
near the bottom with a valve for passing the condensation water from the kettles to
the hot well or cistern B Fig. 2 and 3.
Towards the front of the foundation plate A and on either side of the furnace C is
fitted a steam closet or steam chest H Fig. and 2 of metal and having doors H³
Fig. 1 and 2 for the insertion of articles to be steamed.
Each closet has flanges for the purpose of securing it to the bed or foundation
plate A.
The front frame of each closet or chest has a recess or groove which is filled in
with a strip of asbestos or india rubber and on the edge of the door is a projection
which upon locking the door shuts into the asbestos or india rubber and renders the
door steam tight.
A steam pipe H' Fig. 1. 2 and 3 is carried from the steam chest or dome B'
Fig. 1. 3 and 4 of the boiler into each closet or chest terminating in a perforated
pipe in the interior and near the bottom of the steam closet or chest H Fig. 1
and 2 for the distribution of steam and the supply thereof is regulated by a valve
or cock. An open exhaust pipe H2 Fig. 1 and 2 is provided for the carrying off
the condensed steam as before described.
The apparatus is fitted with an iron chimney or flue the end of which may be
inserted into any existing chimney or carried up independently as may be found
necessary.

page_text: The apparatus is fitted with a steam blast pipe from the boiler inserted into the
chimney for the purpose of drawing up the fire quickly.
The flow of steam is regulated by a valve or cock.
The foregoing portion of this Specification contains a description of the improved
cooking apparatus and directions for constructing the same in the manner in which
I prefer to construct it and I regard the following as the essential features in it
and its component parts:
:―
(a) The boiler to be a tubular one.
(b) The grill or grating so constructed and attached to the boiler that the flames
or hot gases which pass through the boiler tubes may at the same time be made
available for grilling or toasting purposes so as to economise the heat.
(c) The oven to be heated by the hot gases which have hea ed the boiler as such
gases pass round the oven on their way to the chimney.
(d) The steam kettles having a metal lining fitted into an outer case or jacket and
having vertical metal tubes springing from the bottom and bent at the top both ends
thereof being open to the chamber formed by the metal lining and outer case or jacket
so as to allow the circulation of steam in the said chamber and tubes. The tubes
being so placed as to permit of the kettle being cleaned out more readily when
necessary.
I do not claim any of the individual parts of the apparatus as in themselves being
my invention.
I claim as my invention the following combinations whose elements have respectively
the essential features above mentioned (a, b, c, d) and such only namely
1. The combination for cooking purposes of the boiler a with the grill b.
2. The combination for cooking purposes of the boiler a with the oven c.
3. The combination for cooking purposes of the boiler a with the kettle d.
Dated this 5th day of May 1890.
HENRY THOMAS COOK.