Year: 1895

page_text: Date of Application, 19th Sept., 1895-Accepted, 2nd Nov., 1895
Foreign Patent Solicitors 6, Lord Street, Liverpool and 6 Bank Street,
Manchester both in the County of Lancaster, 118 New Street, Birmingham,
in the County of Warwick and 31 High Holborn in the County of Middlesex,
Civil Engineer, 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 pans for cooking and like purposes and consists in
a double pan resulting from the combination of two pans one within the other,
an annular space being left between the two sufficient to hold a certain quantity of
water.
In the accompanying drawings
Figure 1 is a vertical section of the whole pan;
Figure 2 is a sectional view of part of the lid ;
Figure 3 is a view showing the arrangement of the devices which hold the two
saucepans together;
Figures 4 and 5 are vertical sections of the two pans as used separately.
Figure 6 is a vertical section of a pan with projections, lugs or collars for resting
on an annular grate and
Figure 7 is a plan view of these projections.
This improved pan is composed of an outer vessel a and an inner vessel b. Each
of these is provided with a safety valve c and d respectively, (Figure 1) and a
strongly projecting flange a¹ b' (Figure 2), formed by bending back the metal of
the pan itself.
A lid as shown in Figure 1 for covering the pan b, serves also for covering the
outer pan a.
For this purpose it is necessary that the edges or flanges both of the
pans band of the cover c¹ (Figure 2) shall have a perfectly level surface and be
of the same external diameter. Hooks 9 and wedges s, Figures 2 and 3, are
provided to hold fast together the edges a band similarly hooks g' and wedges s'.
Figure 3, are provided to hold together the edges ¿¹ and c¹ as in ordinary Papin
digesters.
Rings or washers of asbestos or the like may be employed as a joint between the
cover and the pan and between the pans themselves.
The pan being formed, as before stated, of two detachable pans, the latter can
if desired be used separately. For this purpose it is only necessary to withdraw
the pan 6 from the pan a (Figures 4 and 5) and to fit the cover on either. A
separate lid may also be provided for the other pan, which lid may be of an
ordinary kind or be fitted with a safety valve, in which case the pans form two
Papin digesters.
The essential advantage of the pan which forms the object of this invention is
that it enables sufficiently high temperatures to be reached to destroy micro-
organisms.
The method of using the improved pan, which is very simple, is as follows:-
The double pan is arranged as shown in Figure 1, and when placed on the fire

page_text: the water contained in the outer pan a becoming heated communicates its heat to
the inner pan b. The safety valve c and d being closed, the temperature rises
above 100° Centigrade and may be regulated at will by means of the counter-
weights thereon. In the internal vessel a meat, vegetables, potatoes, chestnuts,
fruit, rice or, the like may be cooked, either with or without water.
It is evident that the cooking will be effected with rapidity by reason of the
high temperature, and the food will thereby be more palatable and even more
digestible.
The characteristic of this system consists in that the food has no need to be
mixed or turned and will never taste of burning, the result of which is a great
saving of labour and attention.
"
The temperature at which the meats or the food may be cooked may be
regulated by means of the valves in order to effect with certainty the total
destruction of bacteria, more particularly those of maize flour, which is the cause
Pellagra.' The
of the terrible malady known in Italy under the name of "
porridge such as is made at present by the peasants is a mixture of cooked and
uncooked parts of maize flour, but it is indisputable that by reason of the imperfect
cooking, the bacteria are not killed but preserve all their vitality.
By cooking the porridge in a water bath with the pan, hereinbefore described, a
high temperature can be attained, which is distributed equally over the entire
contents so as to destroy all kinds of micro-organisms.
It is of course evident that the pans may be of various thicknesses according to
the temperature which it is desired to attain.
As the use of stoves during the winter is becoming more and more common in
the country, it is preferable to form the pans in such a way as to be capable of
being adapted to the means which are at the disposal of the peasants. For this
object the pans are provided with projecting lugs or collars which rest on
annular rings C of cast metal divided into two parts and capable of being fitted on
the circumference of the hole, in the plate A of a stove (Figure 6).
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, I declare that what I claim is :-
1. A double pan for cooking and like purposes formed by the combination of
two pans (a and b) and a cover (c), such as herein before described and shown more
particularly in section in Figure 1 of the accompanying drawings.
2. In a pan of the kind described, valves (c and d) placed substantially as shown
in the drawing, or having any other suitable form or position which may be found
to be advantageous as and for the purpose set forth.
3. In a double pan of the kind described flanges (2, 6', c¹) with hooks (g g¹) and
wedges (ss) substantially as herein before described and shown in Figures 2 and 3
of the accompanying drawings for the purpose set forth.
Dated this 18th day of September 1895.
WM. P. THOMPSON & Co.,
Agents.