Year: 1887

page_text: Date of Application, 20th Jan., 1887.
Complete Left, 2nd Aug., 1887.
Complete Accepted, 16th Sept., 1887.
We, HEINRICH GROSS and PETER HESEMANN, Manufacturers of Düsseldorf,
Germany, do hereby declare the nature of this invention to be as follows:-
It is found that coffee may be made to retain its aroma better by suddenly cooling
the coffee during and after the process of roasting. For this reason
combined with the roasting apparatus a fan situated in the same casing.
we have
The upper part of the casing is divided into two compartments by a moveable
partition, one of the said compartments serving as roasting chamber and the other as
cooling chamber; and the roasting drum, made of perforated sheet metal is adapted to
move along its shaft, or with the same, from one compartment into the other.
Under the roasting compartment, and separated from the same, by a roof or
polygonal partition of sheet metal, is the combustion chamber containing the grate,
and underneath the cooling chamber is a fan separated from the same by an oblique
roof or partition of sheet metal.
The partition between the roasting and cooling chamber is preferably composed of
two semi-circular plates or segments hinged together at the top of the casing and
recessed in the centre to give room for the shaft of the drum. These segments are
turned by means of the same operating lever which serves to shift the drum from one
compartment into the other. The operating lever is horizontal and has its fulcrum in
or near the side of the casing. The inner arm of the lever is forked to pass round
the hub of the drum, and slotted for the reception of two radial pins, and the outer
arın contains a horizontal pivot and terminates in a handle. By means of this
horizontal pivot the outer arm can be turned up and down about 90° for the purpose
of turning the two semi-circular segments into and out of the casing. For this
purpose two levers are mounted on the axle which serves as a fulcrum for the two
segments and a third lever is pivoted at the side of the casing a short distance above
the fulcrum of the operating lever. The lower lever or crank is joined to one of the
upper levers by a connecting rod extending below the operating lever and supporting
the outer arm of the same by a pin. The two upper levers or cranks may be
connected at their outer ends by a chain or link.

page_text: If it is desired to shift the roasting drum into the ventilating or cooling chamber,
the handle of the operating lever is pulled downward and thereby the two segments
are turned symmetrically outward, so as to establish communication between the two
compartments. Subsequently the operating lever is turned horizontally so as to
place the drum into the cooling chamber, after which the handle is left to itself and
raised again by the weight of the segments, which fall automatically into their closing
position. At one end of the drum axle is mounted a crank and at the other a pulley
with clutch coupling, which allows the pulley to be coupled with, or uncoupled from,
the shaft by turning a lever. This lever is connected with the operating lever by a
rod in such a manner that the operating lever also serves for starting or stopping the
rotation of the drum, when required.
The inclined partition or roof between the cooling chamber and the ventilator has
an aperture covered by a flap, which is connected by levers and rods with the flap
which covers the outlet for the roasted coffee, the connection being so arranged that
the ventilating flap closes when the discharge flap opens, and vice-versa.
Dated this 20th day of January 1887.
FAIRFAX & WETTER,
433, Strand, London,
Agents for the Applicants.

page_text: Process and Apparatus for Roasting Coffee.
We, HEINRICH GROSS and PETER HESEMANN, Manufacturers, of Düsseldorf,
Germany, 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 tho
following statement :-
The present invention is based on the fact, that coffee will retain its aroma better,
if it is suddenly cooled during and after the process of roasting.
We have therefore provided the roasting apparatus with a fan and a cooling
chamber situated in the same casing as the roasting chamber. The roasting drum is
so arranged that it can be rapidly removed from one chamber into the other situated
at the side thereof.
As illustrated by the accompanying drawings, the drum is mounted on a shaft a
and moveable along the same by means of a lever b. The forked front end of this
lever has a pair of slots to receive the studs c of a ring mounted on the hub of the
drum and adapted to turn thereon. Instead of this arrangement, the drum may,
however, be fixed on the shaft and shifted together with the latter. For roasting the
coffee contained in the drum, the latter is placed over the fire or combustion chamber,
by means of the lever b, so as to occupy the position represented by Fig. 1.
A plate e closing the combustion chamber at the top, serves to protect the drum, or
the roasting chamber, from direct contact with the flame. The combustion chamber
is surrounded by double walls separated from each other by a bad conductor of heat.
The cooling chamber is separated from the combustion chamber by a fixed insulating
partition and from the roasting chamber by movable partitions or semi-circular
plates : To prevent the plates g, g' from impeding the motion of the drum,
they are rendered movable in the following manner.
The lever pivoted at h (to the casing or wall of the cooling chamber) is provided
with a hinge joint which allows the outer part d of the lever to be turned up into a
nearly vertical position. This hinged part d is situated and held between a pair of
rods connected with a pair of cranks 4, and k². To the crank is attached the
lower end of a rod connected at its upper end with the arm m of the plate or
movable partition g. By turning the lever d downward, the cranks k¹, ², together
with the rod and arm m, are lowered, and therefore the plate g lifted.
To the arm m is attached a chain or cord passing over the roller o and attached
by its opposite end to the arm m' of the plate gl. Consequently, if the arm m and
plate 7 are set in motion, the other arm and plate move in the opposite direction, so
as to provide sufficient room for the drum to slide along under the said plates.
After the sliding motion of the drum is completed and the lever left to itself, the
latter is lifted by the crank k under the influence of the weight of plates y and gl, and
will no longer obstruct the space in front of the disc.
By the motion of the drum, the fan is simultaneously set in or out of action, the
leverd being connected with the rod p (Fig. 4) attached at its other end to the

page_text: disengaging lever q. By shifting the drum into the cooling chamber, above the fan,
the rod p is pulled and the lever turned in such a manner that the grooved pulley
will be coupled together with the ring fixed on the shaft. The grooved pulley
which drives the ventilation shaft by means of a cord, must therefore take part in
the motion of the axle a and drive the fan. The lever d therefore serves to transfer
the drum from the heating chamber into the cooling chamber, to open and close the
partitions and g¹ at the required moment, and to put the fan in and out of action
when required.
For emptying, the sliding cover of the drum is removed and the opening turned
downward, so that the coffee beans may fall upon the inclined plate p.
Having now particularly described and ascertained the nature of our said Invention,
and in what manner the same is to be performed, we declare that what we claim is :-
1. A coffee roasting apparatus having a roasting and a cooling chamber placed
side by side in the same casing and means for shifting the drum at will from one
chamber into the other, substantially as and for the purpose described.
2. A lever b, d, adapted to serve the double function of shifting the drum and
operating the mechanism for moving the partitions or plates g, g, substantially as
described.
3. The mechanism for establishing and interrupting communication between the
roasting chamber and the cooling chamber by the motion of the lever d, substantially
as described.
4. The combination of lever with mechanism for setting the fan in and out of
action simultaneously with the shifting of the drums, substantially as described.
5. The process of preparing coffee beans by first roasting them in a heating
chamber and then suddenly transferring them to a cooling chamber provided with a
fan or equivalent means of cooling, substantially as described.
Data: 1
1007
FAIRFAX & WETTER,
433, Strand, London,
Agents for the Applicants.