Improvements in Steam Cooking Apparatus.
Year: 1892

page_text: Date of Application, 15th Mar., 1892
Complete Specification Left, 15th Nov., 1892-Accepted, 31st Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Steam Cooking Apparatus.
We EDWARD CLEMENTS trading as C. Jeakes & Co. of 51 Great Russell
Street Bloomsbury in the County of London Cooking Laundry and Domestic
Engineers and WILLIAM CRICHTON SAUNDERS Manager of the Refreshment
Department House of Commons Westminster in the County of London do hereby
declare the nature of this invention to be as follows:-
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This invention relates to apparatus for cooking by steam and has for its object
to cook various kinds of food by steam and especially as a potatoe-steamer" to
prevent or reduce injury hitherto usually caused to potatoes-in cooking same by
steam-by the water of condensation and otherwise to improve apparatus for
cooking potatoes and other edibles by steam.
For this purpose we proceed as follows:-
A large enclosing wall or case contains one two or more steam cooking chambers
but for the sake of example we will describe only one such steam cooking chamber
-it being understood that any number of such chambers may be arranged and
mounted together according to requirements.
This cooking chamber has an arched or domed or other slanting curved or
angular shaped roof or top thereto so that the lowest point on said roof is in contact
with the side or sides or ends or both and this formation of the roof or top of the
chamber is very important and is an essential part of our invention-as thereby
any steam condensing on the roof will drain down such slanting roof and run down
the sides of the chamber and thence to the outlet or drain without dropping on the
potatoes or other food in the said cooking chamber.
One two or more food supporting or food carrying devices of any suitable
construction are placed in the oven or steam cooking chamber in any well known
or suitable manner and the door is closed and tightly screwed up or secured
sufficiently steam tight and the steam valve is then turned on and steam is admitted
into the cooking chamber through a series of fine holes or other outlet advan-
tageously placed close to the door and directed inwardly so that the steam rises
up through all the food supports and food thereon.
The bottom of the chamber is dished curved slanted or otherwise formed so as
conduct all water to the drain or outlet.
The drain pipe to each chamber (where more than one chamber is used) has a
back pressure valve therein and a steam safety valve or steam outlet is provided
over or out of each chamber to allow escape of steam whenever a certain pressure
is exceeded.
We find it convenient and advantageous to form a vertical recess at the back end
of the chamber the lower part of which conducts the water of condensation to the
drain and the upper part thereof leading to the escape valve or safety valve afore-
said but we do not confine ourselves hereto.
Dated this 15th day of March 1892.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Steam Cooking Apparatus.
We, EDWARD CLEMENTS trading as C. Jeakes & Co. of 51 Great Russell
Street, Bloomsbury in the County of London, Cooking Laundry and Domestic
Engineers, and WILLIAM CRICHTON SAUNDERS Manager of the Refreshment
Department, House of Commons, Westminster, in the County of London, 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 :-
This invention relates to apparatus for cooking by steam and has for its object
to cook various kinds of food by steam and especially as a "potato-steamer to
prevent or reduce injury hitherto usually caused to potatoes-in cooking same by
steam-by the water of condensation, and otherwise to improve apparatus for
cooking potatoes and other edibles by steam.
This invention is as follows:-
A large enclosing wall or case contains one two or more steam cooking chambers-
but for the sake of example we will describe only one such steam cooking chamber
-it being understood that any number of such chambers may be arranged and
mounted together according to requirements.
This cooking chamber has an arched or domed or other slanting curved or
angular shaped roof or top thereto so that the lowest point on said roof is in
contact with the side or sides or ends or both and this formation of the roof or
top of the chamber is very important and is an essential part of this invention-as
thereby any steam condensing on the roof will drain down such slanting roof and
run down the sides of the chamber and thence to the outlet or drain without
dropping on the potatoes or other food in the said cooking chamber.
One two or more food supporting or food carrying devices of any suitable con-
struction are placed in the oven or steam cooking chamber in any well known or
suitable manner and the door is closed and tightly screwed up or otherwise secured
sufficiently steam tight and the steam valve is then turned on and the steam is
admitted into the cooking chamber through a series of fine holes or other outlet
advantageously placed close to the door and directed inwardly so that the steam
rises up through all the food supports and food thereon.
The bottom of the chamber is dished curved slanted or otherwise formed so as
to conduct all water to the drain or outlet.
The drain pipe to each chamber (where more than one chamber is used) has a
back-pressure valve therein and a steam safety valve or steam outlet is provided
over or out of each chamber to allow escape of steam whenever a certain pressure
is exceeded.
A vertical recess is or may be formed at the back end of the chamber the lower
part of which conducts the water of condensation to the drain and the upper part
thereof leading to the escape valve or safety valve aforesaid.
And in order that this invention may be easily understood and readily carried
into practice we will proceed to further describe this invention with reference to
the drawings hereunto annexed.
the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a front view in elevation of four cooking chambers arranged and
mounted together.
Fig. 2 is a side elevation of Fig. 1.
Fig. 3 is a sectional side elevation showing the interior of the cooking chambers.

page_text: a is the enclosing wall or case containing in the apparatus illustrated four
cooking chambers beach closed by a separate door 6' which is rendered steam tight
by the screw wheel c or in any other suitable manner as is well understood.
The interior of the chamber 6 has an arched roof d (Fig. 1) from front to back
the sides of this roof terminating against the interior side walls e of the
chamber b.
The bottom of the chamber b may be made flat and slant from front to back
see Fig. 3 so as to drain off any water of condensation or same may be dished or
curved for the same purpose as illustrated in dotted lines in Fig. 1.
9 g are ledges or frames for supporting sliding drawers or trays h h any suitable
number of these trays h being used as desired according to the size of the
chamber 6-but in all cases the topmost tray h must not come in contact with the
arched roof d but must lie within the lowermost points of such roof so as to be
clear of same so that any water of condensation on the roof d will run down the
said roof clear of the said trays h thus keeping the food on the trays h perfectly
free from any water of condensation dropping on to same from the roof and also
serving to keep the whole chamber in a dry state.
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m is a recess at the back of each chamber 6 the upper part of said recess m
communicating with a safety valve n and the lower part of same (into which the
bottomf drains) terminating in a drain pipe o in which a back-pressure valve may
be arranged if desired.
An independent steam valve p is fitted to each chamber 6 to control the admission
of steam through the steam inlet r to the perforated pipe s to diffuse the steam at
or near the front of the chamber b.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a steam cooking apparatus consisting of one or more independent ovens or
chambers the arrangement and combination in each such chamber of an arched
domed or other slanting curved or angular shaped roof the lowest part of which
roof lies clear of or outside of the trays or shelves on which is supported the food
to be cooked substantially as and for the purposes set forth.
2. The combination in a steam cooking oven or chamber of a curved arched
domed or the like roof, a curved or slanting bottom, and a recess at the back of
said chamber to drain off the water of condensation substantially in the manner
and for the purposes set forth.
3. The combination in a steam cooking oven or chamber having a curved arched
domed or the like roof of a recess to drain off the water of condensation at the
back of said chamber and a perforated pipe or steam diffuser at or near the front
of said chamber all substantially in the manner and for the purposes hereinbefore
described and illustrated in the drawings hereunto annexed.
Dated this 15th day of November 1802
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W:C.,
Agents for the Applicants.