Improvements in or relating to Furnaces and Cylinders used for Roasting Cocoa, Coffee, and the like.
Year: 1898

page_text: Date of Application, 17th Aug., 1898
Complete Specification Left, 23rd Aug., 1898-Accepted, 19th Nov.,
1898
Improvements in or relating to Furnaces and Cylinders used for
Roasting Cocoa, Coffee, and the like.
I, MICHELE TALMONE, of 22, Gibson Square, Islington, County of London,
Machinist, do hereby declare the nature of this invention to be as follows:-
This invention has for object an improvement in furnaces by partitioning
off the furnace proper from its casing in order that air may have a passage around
and derive heat therefrom for transmission to and through the cylinder in which
the roasting takes place to draw off the volatile vapours as they are produced
during the roasting operation, the escaping vapours being led to the uptake.
The cylinder is provided with perforated diaphragms in connection by a central
or trunk tube, branches from which when the cylinder is in use, coincide with the
trunk tube for the free passage of the heated air.
The cylinder is supported on guide-rails by trunnions and gear wheels to enable
the cylinder when the hood is lifted to be drawn forward on a rack, the gear for
the rack being operable from one side of the frame or structure which is self con-
tained.
The other side of the structure has the cylinder rotating gear such as from an
overhead motioned shaft, and when the cylinder is out, other gear can turn it
over for the lid of the cylinder to be removed for the contents to be discharged.
The structure is such that no brickwork or masonry is needed and if desired
it can be shifted and placed in any desired position.
The furnace proper is directly under the cylinder when for roasting, and when
the cylinder has to be emptied or recharged, it is brought to the front, the meeting
ends of the branch air pipes being so arranged that the ends fit in contact when
the cylinder is pushed in.
By this invention, while the berries or beans are being roasted, the volatile
vapour is simultaneously drawn off.
Improvements in or relating to Furnaces and Cylinders used for
Roasting Cocoa, Coffee, and the like.
I, MICHELE TALMONE, of 22, Gibson Square, Islington, County of London,
Iachinist, do hereby declare the nature of this invention and in what manner
D977

page_text: the same is to be performed to be particularly described and ascertained in and
by the following statement:-
This invention has for object, an improvement in furnaces by partitioning
off the furnace proper from its casing in order that air may have a passage around
and derive heat therefrom for transmission to and through the cylinder in which
the roasting takes place to draw off the volatile vapours as they are produced
during the roasting operation, the escaping vapours being led to the uptake.
The cylinder is provided with perforated diaphragms in connection by a central
or trunk tube, branches from which when the cylinder is in use, coincide with the
trunk tube for the free passage of the heated air.
The cylinder is supported on guide rails by trunnions and gear wheels to enable
the cylinder when the hood is lifted to be drawn forward on a rack, the gear for
the rack being operable from one side of the frame or structure which is self con-
tained.
The other side of the structure has the, cylinder rotating gear such as from an
overhead motioned shaft, and when the cylinder is out, other gear can turn it
over for the lid of the cylinder to be removed for the contents to be discharged.
The structure is such that no brickwork or masonry is needed, and if desired
it can be shifted and placed in any desired position.
The furnace proper is directly under the cylinder when for roasting, and when
the cylinder has to be emptied or recharged. it is brought to the front, the meeting
ends of the branch air pipes being so arranged that the ends fit in contact when
the cylinder is pushed in.
By this invention while the berries or beans are being roasted the volatile
vapour is simultaneously drawn off.
My invention will be clearly understood by reference to the annexed sheet of
drawings.
Figure 1 side elevation with cylinder in position over the furnace but with the
hood of the furnace raised or thrown up such as when the cylinder has to be
withdrawn.
Figure 2 transverse section of furnace and cylinder.
Figure 3 elevation of the side, the reverse of that shown at Figure 1 but with
the cylinder drawn out as if for discharging the contents or for recharging it.
Figure 4 section of apparatus at right angles to that shown at Figure 2.
Figure 5 plan.
The letters of reference apply to the same parts in all the figures.
A, furnace proper of rectangular shape and consisting of a hollow stove into
which air can enter by the grating B and while travelling around under the
partition C become warmed by conduction from the lower walls of the furnace
and then be heated to a higher degree in the upper air chamber D from which it
passes to the bend E (or branch) into the hollow trunnion or axle F for distribution
in the end G of the cylinder H from which it flows partly through the perforated
diaphragm I and partly through the trunk J which is also perforated, where it
· can commingle with the berries or material being roasted, and so become saturated
with the moisture thrown off from the berries and also collect the volatile oil
emitted from them during the roasting, operation, the air thus impregnated pass-
ing away through the perforation of the other diaphragm K into the chamber L
where condensation partly takes place, further condensation occurring in the
pipe N provided with a closing plug N¹ which can be removed when desired, the
escaping vapour passes by the trunnion M and the pipe N to the uptake or
chimney P which also carries away the products of combustion from the furnace A.
The furnace and roaster is preferably self-contained and can be set against a
wall, such as at Q, Figures 4 and 5, or if' desired can be mounted on wheels for
localizing it in any position.
According to the arrangement represented, the furnace and air heater is one
casting and the frame R carrying the cylinder H of side frames bolted together,
each side frame being provided with smooth top edges of V or other shape as-sur-

page_text: faces on which bars S can slide, said bars forming the support for the cylinder H
and capable of being moved along by the gear wheel T and quadrant U mounted
at opposite ends of the axle V when the pinion W is turned by the crank handle X,
the gear wheel T and quadrant U being both in gear with the racks Y, Y, of the
supporting and sliding bars S, S, by which means the cylinder H can when the
hood is raised be moved outwardly from over the furnace, such as when the cylinder
has to be discharged or refilled when the lid Z is slid off or thrown open.
It will be observed that as the cylinder is moved outwardly to its fullest extent
by the gear T, U, the teeth of the wheel a engage with the teeth of the pinion b
which enables the cylinder to be turned over for the purpose of emptying it, and
when the cylinder is pushed back by the gear T, U, on the winch handle X being
turned, the teeth of the wheel a engage with those of the pinion c this being
driven by the pulley d from overhead or other motion as desired, the hood e
being then lowered to enclose the cylinder for the roasting. The back travel of the
cylinder H, as aforesaid, re-puts the branch pipes E, N, and the trunk J in com-
munication, as will be understood.
The pipes can be provided with dampers or draught valves for retarding or
otherwise the flow of air, as also the chimney for regulating the draught of the
furnace.
The cylinder H with a view of turning the material under operation is provided
with baffles or stirrers f.
By this invention, cocoa nibs, or the like, or coffee, or the like. can be roasted,
and all the inherent and health giving properties retained while the objectionable
volatile oil or spirit becomes removed as well as the steam and smoke vapour, such
as is given off with highly roasted berries.
Having now particularly described and ascertained the nature of this in-
vention, and in what manner the same is to be performed, I. declare that what I
claim is:-
1. The apparatus shown on the annexed drawings, consisting of air heating
and berry roasting furnace A perforated diaphragmed cylinder H, so mounted
that it can be moved to and fro by gear on the frame from one side thereof and
be rotated by gear on the other side, whether for roasting, or for emptying pur-
poses as set forth.
2. A furnace to roast cocoa in which there is a removable cylinder for contain-
ing cocoa or coffee beans, and a fire place surrounded by a double wall or air
chamber, both being so arranged that the air warmed from the fire place goes
through the cylinder and then escapes to the chimney, substantially as described
and shown.
1000