IMPROVED APPARATUS FOR RETAINING THE HEAT IN COOKED FOOD
Year: 1881

page_text: LETTERS PATENT to Edwin Ambrose Brydges, of the Firm of Brydges &
Co., Engineers and Patent Solicitors, of No. 73, Königgraetzer Str., in the
City of Berlin and German Empire, and 6, St. Leonard's Terrace, Upton, in the
County of Middlesex, for an Invention of "IMPROVED APPARATUS FOR
RETAINING THE HEAT IN COOKED FOOD." A communication from abroad by
PROVISIONAL SPECIFICATION left by the said Edwin Ambrose Brydges at
the Office of the Commissioners of Patents on the 14th February 1881.
EDWIN AMBROSE BRYDGES, of the Firm of Brydges & Co., Engineers and Patent
Solicitors, of No. 73, Königgraetzer Str., in the City of Berlin and German Empire,
and 6, St. Leonard's Terrace, Upton, in the County of Middlesex. " IMPROVED
APPARATUS FOR RETAINING THE HEAT IN COOKED FOOD." [A communication
from abroad by Dr. Eduard Finne, of Dröbak, in the Kingdom of Norway.]
This Invention relates to improved apparatus for keeping food warm or for
preventing the escape of the heat from cooked food or boiled drinks or other
alimentary matters.
The apparatus consists of a receptacle made of wood, sheet metal, or other
suitable material, in which a second smaller receptacle of sheet metal or other
suitable material is placed.
'
The space between the walls of these two receptacles is filled in with an isolating
material composed of finely cut cork and cotton so as to prevent loss of heat or the
radiation of the same, and thus retain the said cooked or warm articles of food for
a very considerable space of time in a warm condition. It has been proved by
repeated trials that cooked food after remaining eleven hours in the apparatus
retained upwards of 60° centigrade.
The food which is to be kept warm is placed in vessels of earthenware or metal,
preferably of such shape as to form a cylinder when placed together.

page_text: One or more tiers of such cylinders formed of one, two, or more vessels can be
employed, and the vessels of the upper tier are held together by means of a
ring.
In this manner when several smaller vessels are held together by the said ring
several kinds of food can be kept warm in the same apparatus.
The lid is attached to the apparatus by means of suitable hinges, and is provided
in like manner as the box or case with a thick lining of cork and cotton.
To further prevent the radiation of heat a flat hollow vessel or disc of sheet metal
or other suitable material and filled with cork and cotton may be placed above the
vessel or vessels containing the articles of food.

page_text: SPECIFICATION in pursuance of the conditions of the Letters. Patent filed
by the said Edwin Ambrose Brydges in the Great Seal Patent Office on the
9th August 1881.
EDWIN, AMBROSE BRYDGES, of the Firm of Brydges and Co., Engineers and Patent
Solicitors, of 73, Königgraetzer Str., in the City of Berlin and German Empire,
and. 6, St. Leonard's Terrace,, Upton, in the County of Middlesex. "AN IMPROVED
APPARATUS FOR RETAINING THE HEAT IN COOKED FOOD." A. communication.
from abroad by Dr. Eduard Finne, of Dröbak, in the Kingdom. of, Norway.
My said Invention relates to isolating apparatus for keeping food warm or for
preventing the escape of warmth from cooked food or boiled drinks or other
alimentary matters..
By employing my said Invention cooked or warm victuals or. drinks can be
kept warm for a considerable length of time without in the least degree, losing their
flavor..
My said apparatus consists of a receptacle made of wood, sheet-metal, or other
suitable material, which contains a second smaller receptacle of sheet metal or other.
suitable material.
Between the walls of these two said receptacles I insert isolating material com-
posed of finely cut or divided cork and cotton so as to prevent loss of heat or the
radiation of the same, and thus retain the said cooked or warm articles of food for
a very considerable space of time in a warm condition.
It has, been proved by repeated trials that cooked food contained upwards of
60° centigrade after remaining eleven hours in the apparatus.
Fig. 1 is a vertical section of my apparatus.
Fig. 2 is a horizontal section of the same.
Fig. 3 is an isometrical view of the apparatus with raised lid.
Fig. 4 is an isometrical view of the vessel or vessels which contain the said
articles of food, and which said vessels or receptacles are held together by a ring of
suitable form according to the form of the vessels or pots employed.
Fig. 5 shews one of the various forms of the said ring.
C is a box or case of wood, sheet metal, or other suitable material; D is the inner
receptacle of sheet metal or other suitable material.
The space K formed between the inner walls of the box or case C and the outer
surface of the inner receptacle is filled with a mixture of small cut cork and
cotton.
The food which is to be kept warm is placed in suitable vessels of earthenware
or metal of desired form and size so that the said vessels when fitted together will
take the form of a cylinder.
One or more tiers of such cylinders formed of one, two, or more vessels can be
employed as shewn in Fig. 1, in which A. is the upper, B the lower tier, and in
which the vessels A are held together by means of the ring r, Fig. 5.
In this manner several smaller vessels can be held together by the same ring r,
so as to form one cylinder, and so that several kinds of food can be kept warm in
the saine apparatus (Fig. 5).
The lid is attached to the apparatus by means of suitable hinges and is
provided in like manner with the box or case with a thick lining of cork and
cotton.
To further prevent the radiation of heat a hollow disc of sheet metal or other
suitable material filled with cork and cotton can be placed above the vessel or
vessels containing the aforesaid articles of food.
Having now described my said Invention I wish it to be understood that I do
not confine myself to the square or rectangular form of the box or case C or the

page_text: cylindrical form of the vessels when placed in the ring r, nor to the special form
of vessel shown, as the same can be varied without departing from the tenor of
my Invention; but what I do claim and desire to have protected by Letters
Patent is,―
1. An apparatus for keeping articles of food or nourishment or other similar
matter or matters warm, consisting of the outer case or box C, and the interior
cylinders D, having the space between the outer case or box C and the inner
cylinder filled with a mixture of cork (cut into small bits or pieces) and cotton,
.substantially as shown in the accompanying Drawings and set forth in the foregoing
Specification.
2. The segmental or sectorial form of the vessels for containing the food or
other alimentary matter in combination with the ring r for holding the said
vessels together in the form of a cylinder, or in other suitable form, substantially.
as described in the foregoing Specification and shewn in the accompanying
Drawings.
In witness whereof, I, the said Edwin Ambrose Brydges, have hereunto set
my hand and seal, this Twenty eighth day of July, in the year of our Lord
One thousand eight hundred and eighty one.
Witnesses,
GUSTAV EHLEN.
ERNST HOLTZ..
EDWIN A. BRYDGES. (L.s.)