AN IMPROVED PORTABLE COOKING APPARATUS FOR FIELD OR CAMP USE, AND AN IMPROVED FORMATION OF TRENCH IN CONNECTION THERE WITH
Year: 1872

page_text: LETTERS PATENT to James Knowles, of Wolverhampton, in the
County of Staffordshire, Manufacturer, and John Clark Mayell, of
Woolwich, in the County of Kent, Sergeant, 9th Lancers, for the
Invention of "AN IMPROVED PORTABLE COOKING APPARATUS FOR FIELD
OR CAMP USE, AND AN IMPROVED FORMATION OF TRENCH IN CONNECTION
THERE WITH."
Sealed the 15th November 1872, and dated the 23rd May 1872.
PROVISIONAL SPECIFICATION left by the said James Knowles and
John Clark Mayell at the Office of the Commissioners of Patents,
with their Petition, on the 23rd May 1872.
We, JAMES KNOWLES, of Wolverhampton, in the County of Stafford-
shire, Manufacturer, and JOHN CLARK MAYELL, of Woolwich, in the
County of Kent, Sergeant, 9th Lancers, do hereby declare the nature of
the said Invention for "AN IMPROVED PORTABLE COOKING APPARATUS FOR
FIELD OR CAMP USE, AND AN IMPROVED FORMATION OF TRENCH IN CONNECTION
THEREWITH, " to be as follows:-

page_text: A, outer case, which not only constitutes a box enclosing all the other
cooking utensils, but when placed as at Figure 3 forms an oven, of which
its lid a is the door. This case A may be made of any suitable metal,
but we prefer to use sheet iron, stamping out the bottom 6 (Figure 1),
so that it may be riveted to the body at c, whereby we have solid metal
at the bottom edge, one of the greatest wearing surfaces. d are caps
strengthening the bottom corners. They may be dispensed with if desired.
We also prefer to make the body in one piece, bending it to shape and
riveting its two ends as shown at e. f, flange on body, in which the lid a
is countersunk when closed. This case A may also be provided with
straps so that it may be slung over the pack saddle of a sumpter horse or
mule, fastened to a gun carriage, or carried as convenience may require.
The dimensions of the case shown on the Drawing are 21 inches long,
by 17, wide, and 16½ deep, but we do not in any way bind ourselves
thereto.

page_text: B are boilers, gradually decreasing in size from No. 1 to No. 6
inclusive, and which when packed for carriage lie the one in the other, as
at Figure 2, but when in use are placed two, and two, as shown Figure 3.
g, lids of boilers. When the utensils are packed in case A these lids are
placed the one in the other, as at Figure 5, and lie on the top when the
case is filled.
C are cooking pots, gradually decreasing in size from Nos. 1 to 6
inclusive. These pots when required for use are inserted in the plates h
(see Figure 9), placed as at Figure 3, or over any convenient part of the
cooking trench when only one or two of the boilers are over the fire.
When packed for carriage they are placed the one within the other and
lie in the case A, as shown at C, Figure 2, their lids o being placed in
each other as at Figure 6, and lie on the top when the case is packed.
D, Figure 7, is a lantern, shown open at Figure 7*. This lantern is
shown on the Drawing larger than cooking pot C, No. 6, but is in fact
smaller, and is when not required packed therein.
E, Figure 8, pan for catching dripping or other purpose. The plates h
when not in use are placed in this pan, which when packed occupies the
space i, Figure 2.
F, Figure 10, frying pan, the handle of which is hinged at k to fold
over the pan when not in use; G, gridiron, the handle of which pivots
at to fold over frying pan. When packed they occupy the position
shown Figure 2.
It will be observed that the handles of the lids of boiler and cooking.
pots are all made to lie flat when not in use.
COOKING TRENCH.
On reference to Figure 4 (which should be to a larger scale to
correspond with the dimensions of the cooking utensils, Figure 3,) it will
be seen that the main portion H of the trench gradually decreases in
width from the front m, m, to the rear n, n, and is crossed by metal bars
I to support the cooking apparatus. The object in giving this tapering
form to the part H is that when the whole of the cooking apparatus
A, B, C, Figure 3, is set over it (the oven A towards the front m, m,)
there shall be no escape for the flame or heat from the fire excepting
by a passage beneath the whole cooking battery. The bottom of H also
slopes gradually from n, n, down to m, m, and from each side towards
the centre to produce a thorough draft from the fire-place K to the

page_text: flue M, and chimney N. L, front of trench, somewhat deeper than H, to
facilitate the stoking of the fire.
The bars I may be of any desired number, and placed closer together
or further apart as may be desired, and we prefer to bend them so as to
have a slightly concave support for the cooking apparatus, whereby the 5
sides of the boilers meeting at the top slightly separate towards the
bottom to permit flames to rise between them. These bars might also be
hinged so as to form bands for the case A when not in use.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Knowles and John Clark Mayell in the
Great Seal Patent Office on the 20th November 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
KNOWLES, of Wolverhampton, in the County of Staffordshire, Manu-
facturer, and JOHN CLARK MAYELL, of Woolwich, in the County of
Kent, Sergeant, 9th Lancers, send grecting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of May, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said James Knowles and John Clark Mayell,
Her special licence that we, the said James Knowles and John Clark
Mayell, our executors, administrators, and assigns, or such others as we,
the said James Knowles and John Clark Mayell, our executors, adminis-
trators, and assigns, should at any time agree with, and no others, from
time to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for "AN IMPROVED PORTABLE COOKING APParatus
FOR FIELD OR CAMP USE, AND AN IMPROVED FORMATION OF TRENCH IN CONNECTION
THEREWITH," upon the condition (amongst others) that we, the said James
Knowles and John Clark Mayell, our executors or administrators, by an
instrument in writing under our, or one of our, or their, or one of their
hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be per-

page_text: its lid a is the door. This case A may be made of any suitable metal,
and we prefer to use sheet iron, stamping out the bottom 6 (Fig. 1) with
a groove or seam by which it is attached to the body at c; but if desired.
it might be riveted to the body at c, and caps be used for strengthening
the bottom corners. We also prefer to make the body in one piece,
bending it to shape and joining it at one corner by a groove or seam, but
the corner might be riveted. f, flange on body, in which the lid a is
countersunk when closed. This case A may also be provided with straps
so that it may be slung over the pack saddle of a sumpter horse or mule,
fastened to a gun carriage, or carried as convenience may require. The
dimensions of the case shown on the Drawing are 21¼ inches long, by
17 wide, and 16% deep, but we do not in any way bind ourselves
thereto.
B are boilers, gradually decreasing in size from No. 1 to No. 6
inclusive, and which when packed for carriage lie the one in the other, as
at Fig. 2, but when in use are placed two and two, as shown Fig. 3.
g, lids of boilers, which we prefer to stamp in one piece and to make
them fit down into the kettles as shown. When the utensils are packed
in case A these lids are placed the one in the other, as at Fig. 5, and lie
on the top when the case is filled. We prefer to join the bottom to
the body of the kettle by a groove or seam and to unite the one end of
the body in the same manner, but these joints might be riveted if
desired.
C are cooking pots, gradually decreasing in size from Nos. 1 to 6
inclusive. These pots when required for use are inserted in the plates h
(see Fig. 9), placed as at Fig. 3, or over any convenient part of the
cooking trench, when only one or two of the boilers are over the fire.
When packed for carriage they are placed the one within the other, and
lie in the case A, as shown at C, Fig. 2, their lids o being placed in each
other, as at Fig. 6, and lie on the top when the case is packed.
D, Fig. 7, is a lantern, shown open at Fig. 7*. This lantern is shown on
the Drawing larger than cooking pot C, No. 6, but is in fact smaller, and
is when not required packed therein.
E, Fig. 8, pan for catching dripping or other purpose. The plates h
when not in usa are placed in this nan which when neekad

page_text: COOKING TRENCH.
On reference to Fig. 4 (which should be to a larger scale to cor-
respond with the dimensions of the cooking utensils, Fig. 3,) it will be
seen that the main portion H of the trench gradually decreases in width
from the front m, m, to the rear n, n, and is crossed by metal bars I to
support the cooking apparatus. The object in giving this tapering form
to the part H is that when the whole of the cooking apparatus A, B, C,
Fig. 3, is set over it (the oven A towards the front m, m,) there shall be
no escape for the flame or heat from the fire excepting by a passage
beneath the whole cooking battery. The bottom of H also slopes
gradually from n, n, down to m, m, and from each side towards the
centre to produce a thorough draught from the fire-place K to the
flue M and chimney N. L, front of trench, somewhat deeper than H, to
facilitate the stoking of the fire.
The bars I may be of any desired number and placed closer together
or further apart as may be desired; and we prefer to bend them so as to
have a slightly concave support for the cooking apparatus whereby the
sides of the boilers meeting at the top slightly separate towards the
bottom to permit flame to rise between them; these bars might also be
hinged so as to form bands for the case A when not in use.
Having now described and ascertained the nature of our said Inven-
tion, and in what manner the same is or may be performed, we would
have it understood that we do not limit ourselves to the construction
of cooking utensils precisely as herein-before described and illustrated on
the accompanying Sheet of Drawing, as many variations may be made
in their form and make as well as in the material of which they are
made while retaining the essential features of our Invention, and that
what we claim as secured to us by the herein-before in part recited
Letters Patent is, the use of a cooking battery or series of cooking
utensils combined so that it may be used in conjunction with a cooking

page_text: trench of the formation herein-before described, and when not in use be
packed for carriage substantially as herein-before set forth.
In witness whereof, I, the said James Knowles, have hereunto set
my hand and seal, this Eighteenth day of November, in the year
of our Lord One thousand eight hundred and seventy-two.
JAMES KNOWLES. (L.S.)