IMPROVEMENTS CONNECTED WITH OPEN FIRE PORTABLE COOKING BANGES
Year: 1883

page_text: LETTERS PATENT to Thomas John Constantine of 61 Fleet Street in the city
of London Manufacturer of the Treasure Cooking Range for an Invention of
IMPROVEMENTS CONNECTED WITH OPEN FIRE PORTABLE COOKING BANGES
PROVISIONAL SPECIFICATION left by the said Thomas John Constantine at
the Office of the Commissioners of Patents on the 4th May 1883.
THOMAS JOHN CONSTANTINE of 61 Fleet Street in the city of London, Manu-
facturer of the Treasure Cooking Range IMPROVEMENTS CONNECTED WITH OPEN
FIRE PORTABLE COOKING RANGES
The object of this invention is. First To fit or arrange a vibrating bottom
grate on centres to a portable cooking range so that the fire can be shaken and
the closely packed fuel disturbed the dust or ashes being caused to fall and clear
the bottom of the fire and the bottom grate as to permit of a free ingress of air to
feed itself into and through the fire.
The second object is to arrange a flap valve at the back of the range capable of
being opened for a direct passage of the products of combustion into the chimney
when the fire is first lighted or replenished with fuel the valve being movable
from the outside front of the range.
The front bars of the fire basket are tapered and are arranged vertically or in
the most suitable manner and of curved shape with the broadest portions at the
lower parts where they turn under to correspond with the bottom vibrating grate
before mentioned
These bars are in a casting and the top portions of the sides rest upon supports
attached to the front of the range. The lower part is held secure by the side wall
of the fire basket

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas John Constantine in the Great Seal Patent Office on
the 3rd November 1883.
THOMAS JOHN CONSTANTINE of 61 Fleet Street in the city of London Manu-
facturer of the Treasure Cooking Range IMPROVEMENTS CONNECTED WITH OPEN
FIRE PORTABLE COOKING RANGES
The object of this invention is First To fit or arrange a horizontally or vertically
oscillating or vibrating bottom grate to an open fire portable cooking range so
that the fire can be shaken and the closely packed fuel disturbed the dust or
ashes being caused to fall and clear the bottom of the fire and the bottom grate ns
to permit of a free ingress of air to feed itself into and through the fire.
My invention is clearly showD on the annexed sheet of drawings in which
Figure 1 is a plan, Figure 2 a front elevation and Figure 3 a section through the
fire basket.
A is the bottom grate pivotted at B so that both the back and the front parts
may be slewed sideways or oscillated on a pivot B or from a pivot at the rear
sufficient space being formed under the side cheeks C, C, for the side edges of the
bottom grate to move in as indicated by the dotted lines in Figure 1. The bottom
grate A can be conveniently moved by the hand from the projecting lip D or by
a poker or other like article being inserted in an aperture provided in the lip for
the purpose.
By this portion of my invention. The open fire of a portable cooking range can
be kept clear and free from ashes without seriously disturbing the upper part or
interfering with the main body of fuel. The heat is also much enhanced and the
products of combustion and the gases are better consumed by access and passage
of air into and through the fuel.
I claim as this first part of my invention. Providing open fire portable cooking
ranges with a loose bottom grate capable of being vibrated or oscillated vertically
or horizontally as and for the purposes described and substantially as shown in
the annexed drawings.
The second object of my invention is to arrange a flap valve at the back of the
range and capable of being opened for a direct passage of the products of com⭑
bustion into the chimney when the fire is first lighted or when replenished with
fuel the valve being movable from the outside front of the range.
This second part of my invention is also shown in the annexed drawings E is
a fall down or flap valve fitted to cover an opening F formed in the back G just
over the fire basket H. The flap E is hinged to lugs I, I, and has an extension
piece or rod J which terminates in a crank lever K so that it can be raised or
lowered by the rod L connected thereto the outer end having a knob or handle M
by which it can be operated
The opening F is in direct connection with the main flue N and the flap E is
only intended to be lowered by drawing outwards the knob M when a fire is first
lighted, there not being as a rule sufficient warmth in the chimney to create a
draught around the oven or ovens P P (one of which may be a boiler) to carry the
smoke and products of combustion away from the fire.
By opening the passage F by lowering the flap E at any time such as when the
oven is not required the fire becomes like that in an ordinary Register Stove
the flap acting as the damper thereto.
Instead of hanging the flap valve as shown it may be hinged at the lower part
and be lifted to close the passage to the flue in which case the flap would be in the
flue or reverse to that shown in the drawings.

page_text: I claim as this second part of my invention Fitting a flap valve in the back of
an openfire portable cooking range substantially in the manner shown and as and
for the purpose or purposes described.
The third or last part of my invention is also shown in the annexed drawings.
It consists of making the front bars QQ of the fire basket tapered and arranged
vertically or in any suitable manner. The bars are of curved shape with broad
portions at the lower parts where they turned under to correspond with the
bottom vibrating grate A before mentioned. These bars QQ are in a casting and
the top portions of the sides rest upon supports R R attached to the front of the
range. The lower part is held secure by the side wall of the fire basket.
•
I claim as this part of my invention. Making the front bars of an open fire
portable cooking range of tapered shape in cross section and of curved form with
a fullness at the lower portions and turning in under to correspond with the
bottom grate as described and as shown in the annexed drawings.
I have shown the several improvements above mentioned as applied to the same
open fire portable cooking range but I do not limit myself to so fitting them as
each improvement is available with certain modifications to be fitted separately if
desired.
To ensure a breaking up of the air entering between the walls of the fire basket
and of the ovens (or oven and boiler) and causing it to be heated in its passage I
form gills or studs a a on the walls of the fire basket which divide the air into fine
streams and cause to travel in a circuituous route before commingling with the
gases in the flues. By which means the air becomes highly heated and expanded
and ensures perfect consumption of the smoke and products of combustion before
they can reach the chimney.
In witness whereof I the said Thomas John Constantine have hereunto set my
hand and seal this Second day of November in the year of our Lord One thousand
eight hundred and eighty three
THOMAS JOHN CONSTANTINE (L.S.)