IMPROVE- MENTS IN STOVES POR CONSUMING GAS AND OTHER FUEL, AND IN OVENS TO BE USED THEREWITH
Year: 1867

page_text: LETTERS PATENT to Richard Canham, of Ray Street, Clerkenwell, in the
County of Middlesex, and James Thomson, of Union Road, New
Wandsworth, in the County of Surrey, for the Invention of "IMPROVE-
MENTS IN STOVES POR CONSUMING GAS AND OTHER FUEL, AND IN OVENS TO
BE USED THEREWITH."
Sealed the 9th April 1868, and dated the 12th October 1867.
PROVISIONAL SPECIFICATION left by the said Richard Canham and
James Thomson at the Office of the Commissioners of Patents, with
their Petition, on the 12th October 1867.
We, RICHARD CANHAM, of Ray Street, Clerkenwell, in the County of
Middlesex, and JAMES THOMSON, of Union Road, New Wandsworth, in the
County of Surrey, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN STOVES FOR CONSUMING GAS AND OTHER FUEL, AND IN OVENS
TO BE USED THEREWITH," to be as follows:-
The Invention has for its object improvements in stoves for consuming gas
and other fuel and in ovens to be used therewith, and relates, firstly, to a
novel combision and arrangement of parts of a stove for burning a mixture
of gas and atmospheric air. For this purpose we make the stove by preferencɔ
of a cylindrical form; in the centre of the stove are fixed two cylinders con-
centric with each other, and having a small space left between them; these
cylinders extend from the bottom to a short distanco from the top of the stove,
and are surmounted by a conical cover having a hole through it. The inner
cylinder is closed at top and bottom by wire gauze or perforated metal, and

page_text: has a pipe therein through perforations in which the gas issues into such
cylinder and there mixes with atmospheric air, such mixture of air and gas
being burnt on the top of the wire gauze or perforated metal cover of the
cylinder, the flame thereof being contracted by passing through the hole in
the conical cover. Atmospheric air is supplied to the flame by its passing up
the space between the two inner cylinders, and is caused to impinge thereon
by the conical cover. The products of combustion pass away by a pipe, one
end of which is near the bottom of the stove and open thereto, whilst the
upper end passes out at or near the top of the stove. If desired, the stove
may be adapted for cooking purposes by mounting on the top thereof an oven
or chamber which is open at the bottom, and in the interior of which the food
to be cooked is placed in suitable utensils supported upon a tile or slab fixed
at a short distance above an opening in the top of the stove, which at other
times is covered by a metal or other suitable cover. The oven may be
employed with other descriptions of stoves in a somewhat similar manner.
The Invention relates, secondly, to improvements upon an Invention for
which Letters Patent were granted to James Thomson, on the 8th day of
November 1866, No. 2908, and consists, firstly, in the adaptation of means
to such stoves, whereby they are rendered capable of burning coke, charcoal,
peat, or other similar fuel when gas is not available.
For this purpose we fix
at the bottom of the inner cylinder or combustion chamber a suitable grate,
and we supply fuel thereto through an opening formed through the top of the
stove; the grating is held in position with capability of ready removal or
insertion, as will be well understood. This part of the Invention also consists
in a novel mode of supporting the gas burner, thereby facilitating its removal
from the stove for lighting or otherwise, and its ready replacement. For this
purpose we mount the burner upon a horizontal axis so as to enable it to be
moved up and down thereon, and the other end of the pipe carrying the
horizontal axis is provided with a vertical axis so as to allow the burner
also to be turned round in a horizontal direction; suitable stops and a counter-
balance are employed to facilitate adjustment of the burner.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Canham and James Thomson in the Great Seal
Patent Office on the 11th April 1868.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Canham and James Thomson in the Great Seal
Patent Office on the 11th April 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, RICHARD
CANHAM, of Ray Street, Clerkenwell, in the County of Middlesex, and JAMES

page_text: THOMSON, of Union Road, New Wandsworth, in the County of Surrey, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twelfth day of October, in the year of our
Lord One thousand eight hundred and sixty-seven, in the thirty-first year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Richard Canham and James Thomson, Her special licence, that we,
the said Richard Canbam and James Thomson, our executors, administrators,
and assigns, or such others as we, the said Richard Canham and James
Thomson, our executors, administrators, 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 "IMPROVEMENTS IN
STOVES FOR CONSUMING GAS AND OTHER FUEL, AND IN OVENS TO BE USED THERE-
WITH," upon the condition (amongst others) that we, the said Richard Canham
and James Thonison, our executors or administrators, by an instrument in
writing under 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 performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said Richard Canham, on behalf of myself
and the said James Thomson, do hereby declare the nature of our said Inven-
tion, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement thereof, that is.
to say :-
The Invention has for its object improvements in stoves for consuming gas
and other fuel, and in ovens to be used therewith, and relates, firstly, to a
novel combination and arrangement of parts of a stove for burning a mixture
of gas and atmospheric air; for this purpose we make the stove by prefer-
ence of a cylindrical form. In the centre of the stove are fixed two cylinders
concentric with each other, and having a small space left between them;
these cylinders extend from the bottom to a short distance from the top of the
stove, and are surmounted by a conical cover having a hole through it. The
inner cyliuder is closed at top and bottom by wire guaze or perforated metal,
and has a pipe therein, through perforations in which the gas issues into
such cylinder and there mixes with atmospheric air, such mixture of air
and gas being burnt on the top of the wire guaze or perforated metal cover of

page_text: the cylinder, the flame thereof being contracted; by passing through the hole
in the conical cover atmospheric air is supplied to the flame by its passing up
the space between the two inner cylinders, and is caused to impinge thereon
by the conical cover. The products of combustion pass away by a pipe, one
end of which is near the bottom of the stove and open thereto, whilst the
upper end passes out at or near the top of the stove. If desired the stove
may be adapted for cooking purposes by mounting on the top thereof an
oven or chamber which is open at the bottom, and in the interior of which
the food to be cooked is placed in suitable utensils supported upon a tile or
slab fixed at a short distance above an opening in the top of the stove which
at other times is covered by a metal or other suitable cover.
Figure 1 is a vertical section, and Figure 2 is a horizontal section on the
line 1, 1, of Figure 1, and Figure 3 is a horizontal section on the line 2, 2, of
Figure 1 of a stove and oven constructed according to this part of our
Invention.
a, a, is the outer cylindrical case of the stove; b, c, are two cylinders which
are fixed in the centre thereof; d is a gas pipo placed in the centre of the
cylinder c; e is a conical cover which is mounted over the top of the cylinder
b, c, and f is a pipe or tube through which the products of combustion are
conveyed to the outer atmosphere. The inner cylinder c is covered at the top
by wire guaze or perforated metal c', whilst at the bottom it may be covered
in the same manner, or it may be left open to the atmosphere, as shewn in
the Drawing. g is an oven which is mounted on the top of the stove, whilst
the articles to be cooked are placed in suitable utensils supported on the
slab h which is fixed at a short distance from the top of the stove, and thereby
allows the heated products of combustion to pass freely within the oven g.
When used only for heating purposes the oven may be removed from the top
of the stove, and a suitable cover may be applied thereto, as will bo well
understood. The action of the stove is as follows:-Gas issues from the
pipe d and mixes in the interior of the cylinder c with atmospheric air, which
mixture of gas and atmospheric air is burnt upon the top of the wire guaze
or perforated metal c', whilst atmospheric air is also supplied to the outside of
the flame by passing up between the two cylinders b, c. The conical cover e
serves to direct the air passing up between the cylinders b, c, on to the flame
and to concentrate the flame towards the centre thereof, and thereby promote
more perfect combustion. Air is supplied to the space between the two
cylinders b, c, by means of the pipe b', as shewn in the Drawings, or it may
be admitted in any other suitable manner. The oven g may be employed with
other descriptions of stoves in a somewhat similar manner.

page_text: The Invention relates, secondly, to improvements upon an Iuvention for
which Letters Patent were granted to James Thomson on the 8th day of
November, 1866, No. 2908, and consists, firstly, in the adaptation of means
to such stoves whereby they are rendered capable of burning coke, charcoal,
peat, or other similar fuel when gas is not available. For this purpose we
fix at the bottom of the inner cylinder or combustion chamber a suitable grate,
and we supply fuel thereto through an opening formed through the top of the
stove; the grating is held in position with capability of ready removal or
insertion, as will be well understood.
Figure 4 is a vertical section of a stove and boiler with the second part of
the Invention applied thereto. The boiler is constructed according to the
Invention of James Thomson before referred to; but instead of employing
gas as the beating means, it is shewn provided with a grate a, in which coal,
coke, charcoal, peat, or other similar fuel is used when gas is not available.
The grate may be supported in any suitable manner, and fuel is supplied
thereto through the hole 6 formed in the top of the stove or boiler, such hole
being closed by a suitable cover, as shewn.
The Invention consists, thirdly, in a novel mode of supporting the gas
burner in stoves constructed according to the Letters Patent granted to James
Thomson, herein-before referred to, thereby facilitating its removal from the
stove for lighting or otherwise, and its ready replacement.
For this purpose
we mount the burner upon a horizontal axis so as to enable it to be moved
up and down thereon, and the other end of the pipe carrying the horizontal
axis is provided with a vertical axis so as to allow the burner also to be turned
round in a horizontal direction. Suitable stops and a counterbalance are
employed to facilitate adjustment of the burner.
Figure 5 is a plan, and Figures 6 and 7 are elevations of a burner mounted
according to the third part of our Invention. a is the burner, which is carried
by a pipe a mounted on a horizontal axis 6 formed on the pipe b¹, which is
mounted on a vertical axis c formed on the pipe c', as will be well under-
stood, whereby the burner a is capable of being readily moved first into the
position shewn by the red lines in Figure 6, and then of being turned out
into the position shewn in red lines on Figure 5 for lighting or otherwise, and
of being readily replaced in position in the stove, a suitable counterbalance
weight d and stops d' and e being employed to facilitate adjustment of the
burner a in proper position in the stove.
Having thus described the nature of our said Invention, and the mode in
which we carry the same into effect, we would have it understood that we do
not confine ourselves to the precise details herein shewn and described; but

page_text: what we do claim is, the improvements in stoves for burning gas and other
fuel, and in ovens to be used therewith, substantially as herein shean and
described.
In witness whereof I, the said Richard Canham, have hereunto set my
hand and seal, this Eleventh day of April, in the year of our Lord Oue
thousand eight hundred and sixty-eight.
RICHARD CANHAM. (L.B.)
Witness,
B. J. B. MILLS,
Patent Agent,
35, Southampton Buildings.