Improvements in Furnaces for Coppers and for other like Purposes.
Year: 1888

page_text: Date of Application, 22nd Dec., 1888
Complete Specification Left, 23rd Sept., 1889-Accepted, 26th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvements in Furnaces for Coppers and for other like
Purposes.
I JOHN GAMGEE of 6 Lingfield Road Wimbledon in the County of Surrey,
Gentleman, do hereby declare the nature of this invention to be as follows:-
The objects of my invention are first to construct furnaces for coppers and for other
like purposes in such manner that there shall be an air chamber or air space around
the furnace box or fire box, the said air chamber or air space acting as a non-conductor,
whereby the heat is economized within and the outer casing kept cool, while lagging
can be dispensed with; secondly to provide for a more general distribution of the
heat over the surface of the copper or other vessel than is usually obtained with the
ordinary fire box. The invention has been designed more particularly for portable
furnaces, but it is also applicable to fixed furnaces.
My improved furnace is constructed as follows:-Within an outer casing I place
an inner casing of such smaller dimensions as will leave an annular or other space
around the inner casing. The fire bars are attached to the bottom of the inner
casing and there is a suitable connecting piece between the two casings. The space
between the two casings is preferably made sufficiently large at the upper part to
allow a flue to run round; this flue has several openings, preferably three, from the
inner casing, and the products of combustion which pass through the several openings
all go to one common flue or chimney without. The draught is therefore not direct
from the firing door in front to the flue behind as is the case with the ordinary fire
box, but a more general distribution of heat over the surface of the copper or vessel
is obtained by means of the flue around the upper part.
In carrying out the invention the inner casing may be simply dropped into the
outer one and the copper or pan dropped into the inner casing, the inner casing and
the copper being each supported at top by a flange or lugs.
Dated this oa 1 L
D
1
1000
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Furnaces for Coppers and for other like
Purposes.
I, JOHN GAMGEE of 6 Lingfield Road Wimbledon in the County of Surrey,
Gentleman, 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 :-
The objects of my invention are first to construct furnaces for coppers and for other
like purposes in such manner that there shall be an air chamber or air space around
the furnace box or fire box, the said chamber or air space acting as a non-conductor,
whereby the heat is economized within and the outer casing kept cool, while lagging
can be dispensed with; secondly, to provide for a more general distribution of the
heat over the surface of the copper or other vessel than is usually obtained with the
ordinary fire-box.
My improved furnace is constructed as shown in the annexed drawing. Within an
outer casing a I place an inner casing 6 of such smaller dimensions as will leave an
annular (or other) space c around the inner casing. The fire bars d are attached to
or arranged in the bottom of the inner casing b. The two casings are connected at
the top by a circular plate as shown. When the furnace pan or copper e is in
"

page_text: place a flue is formed at the upper part by three or more L-shaped plates with
openings between, and the products of combustion which pass through the several
openings all go to one common flue or chimney g. The draught is therefore not
direct from the firing door in front to the flue behind as is the case with the ordinary
fire box, but the air enters by the holes and passes as indicated by the arrows to
the space below the fire bars. It then passes upward through the fire bars and fire
and between the L-shaped plates finto the fluo leading to the chimney g; thus a
more general distribution of heat over the whole surface of the furnace copper or
other vessel is obtained and the outside casing is kept cool. The inner casing b
instead of being attached to the outer one as above described may have a flange
around the top and be simply dropped into the outer casing, and the copper or furnace
pan may be dropped into or fixed to the inner casing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is ;
The arrangement and construction of furnaces for coppers and for other like
purposes substantially as hereinbefore described and shown in the annexed drawing.
Dated this 23rd day of September 1889.
J. C. MEW BURN,
55 & 56, Chancery Lane, London, Patent Agent.