AN IMPROVED COOKING STOVE
Year: 1860

page_text: LETTERS PATENT to Charles Stevens, Manager of the British & Foreign
Office for Patents, 1B, Welbeck Street, Cavendish Square, in the County
of Middlesex, for the Invention of "AN IMPROVED COOKING STOVE."-A
communication from abroad by Mr. Zimmermann, of 42, Rue Laffitte,
Paris, in the Empire of France.
COMPLETE SPECIFICATION filed by the said Charles Stevens at the Office-
of the Commissioners of Patents, with his Petition and Declaration, on
the 18th December 1860, pursuant to the 9th Section of the Patent Law
Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES:
STEVENS, Manager of the British & Foreign Office for Patents, 1B, Welbeck
Street, Cavendish Square, in the County of Middlesex, send greeting.
WHEREAS I am in possession of an Invention for "AN IMPROVED COOKING
STOVE," and have petitioned Her Majesty to grant unto me, my executors,
administrators, and assigns, Her Royal Letters Patent for the same, and have
made solemn declaration that it has been communicated to me from abroad
by Mr. Zimmermann, of 42, Rue Laffitte, Paris, in the Empire of
France.
NOW KNOW YE, that I, the said Charles Stevens, do hereby declare the
following Complete Specification under my hand and seal, fully describes and

page_text: ascertains the nature of the said Invention, and the manner in which the same
is to be performed (reference being had to the accompanying Drawings), that
is to say:
The object of the present Invention is an improved cooking stove. It
consists of four principal parts (see Fig. 2, Pl. I.,) viz., a fire-box A, an
oven B, a roasting division C, and a boiler D. On leaving the fire-box A the
flame separates into two distinct parts, one of which continues its direct way,
that is to say, passes above the oven B, and arrives at E (Fig. 2), where a
piece of sheet iron in the form of an arc is placed, which, advancing into the
centre of the furnace, forces the flame into the middle of the boiler D (see E,
Fig. 4). The flame then returns behind the sheet iron E, and passes through
the hole O into the body G (see Fig. 2). The other part of the flame passes
through a grate F, Fig. 2, situated between the fire-box A and the oven B,
follows beneath this oven its entire length, and finally enters the body G by
the hole O, the same as the first flame. A valve H, Fig. 2, is placed at the
bottom of the fire-box, and may be opened at will; it communicates with the
body J, Fig. 4, placed behind the furnace, and leading to the body G, Fig. 4,
and serves to render the draught into the fire-box more direct. Another
valve-L, Fig. 2, is-placed-above-the-oven,-and-may-be-opened-and-shut-at-
will. When closed the entire flame passes beneath the oven, and the bottom.
becomes the most heated. The oven B, Fig. 2, is divided at will by the
slides a, a, on which a piece of sheet iron may be placed. In the roasting
division C, Fig. 2, the cooking is accelerated by means of a sliding piece b,
Fig. 5, which is drawn out by means of a handle C, when the holes in the
piece 6 arrange themselves before other holes at X, Fig. 6, in the roasting
division, leaving them exposed; the roasting division is thus placed in direct
communication with the flame of the fire-box. On the right of the furnace
(Fig. 2) is a sliding partition N, serving to close the roasting division (see N,
Fig. 5). When this partition is open the cooking may be carried on above with
coal or charcoal. Holes arranged in the lower part of the roasting division C
give entrance to the draught (P, P¹, P, Fig. 6,) which is stopped when
required by the valve K, placed at the bottom on the left of the fire-box.
A moveable piece is placed at N, Fig. 1, having a hole in which the spit of
the roasting division turns, being drawn away from or brought nearer to the
fire-box according as the pieces to be roasted are large or small. When the
pieces are too large the partition N is opened, and a cover P, of the same form
as the roasting division (Fig. 2), is placed above, serving as lid to the latter.
A drawer is placed at Q, Fig. 2, receiving the ashes which fall in the intervals
of the grate d of the fire-box A. The boiler D may contain boiling water, in

page_text: which another vessel may be placed. For this purpose round holes are made
in the lid, in which the objects to be heated are placed (see Fig. 3). . These
receptacles are made of copper or cast iron.
DESCRIPTION OF THE FIGURES IN PLATE I.
Fig. 1, elevation of the stove; Fig. 2, section of ditto; Fig. 3, plan of do. ;
Fig. 4, sectional plan of do.; Fig. 5, front view, showing the sliding piece
open; Fig. 6, roasting division as seen from the fire.
The furnace or apparatus as above described is constructed of cast or sheet
iron, and may be heated either, with wood or coal. The size may be varied
without changing the system, and to facilitate the construction and improve
the draught, the following modifications may be made, as represented Pl. 2.
The piece of sheet iron F may be suppressed (see Fig. 2), and the form of the
oven B changed, the cavity in the upper part being extended nearly the whole
length of the oven. The hole O in the body G may be enlarged to the entire
width of the body. The hollow part of the boiler on the side of the oven
(Fig. 2, Pl. I.), is extended the whole height of the boiler, and is made
shallower (see D, Fig. 2, Pl. II.) The valve H at the bottom of the fire-box
is suppressed, as well as the body J, corresponding to it (see Fig. 4, Pl. I.)
The sliding partition N, Fig. 2, Pl. I., is also suppressed, and the roasting
division prolonged and closed in, forming at the bottom a grated box C,
Figs. 1 & 2, Pl. II. The moveable piece N, Fig. 1, Pl. I., is replaced by a
simple horizontal opening, in which the spit is introduced N, Fig. 1, Pl. II.
The valve K, Fig. 2, Pl. I., is likewise suppressed, and a turnspit, which may
be adapted at will, increases the convenience of the apparatus.
Figs. 5, 6, 7, & 8, Pl. II., represent the apparatus constructed on a larger
scale. It consists of two stoves or furnaces similar to that shown Fig. 1, Pl. I.,
united on the side of the roasting divisions, which likewise form a single
division C, Fig. 6, Pl. II. In all other respects it is the same as the furnace
in Fig. 1, Pl. I. The two bodies of the two furnaces unite in one behind the
furnace (see H & G).
Figs. 9, 10, 11, 12, Pl. II., show the same stove as that represented Fig. 1,
Pl. I., except that it is smaller, and has no roasting division; Figs. 13, 14,
15, 16, Pl. II., the same, but having neither roasting division nor boiler. The
absence of the latter here allows of the body being placed on the side, thereby
rendering the draught more direct.
These various modifications and additions are made with a view to the
greater or lesser amount of cooking required to be performed. Each of the
stoves fulfils the same end, and works with equal advantage. In all of them,

page_text: when coal is required to be used, the grate of the fire-box A and the drawer Q
are replaced by a box of cast iron of precisely the same form, except that the
sides are made of greater thickness, on account of the increased intensity of
the heat.
Having thus described my Invention, what I claim and desire to secure by
Letters Patent is, the system of cooking stove, with the several modifications
of the same, as above described and represented in the accompanying
Drawings.
In witness whereof, I, the said Charles Stevens, have hereunto set my
hand and seal, this Eighteenth day of December, in the year of our
Lord One thousand eight hundred and sixty.
OSTADENS STEVENS
CHARLES STEVENS
(L.B.)