Improvements in Roasting Apparatus for Coffee, Cocoa, and the 'like.
Year: 1892

page_text: Improvements in Roasting Apparatus for Coffee, Cocoa, and
the 'like.
We, DAVID GROVE, of 24 Friedrich Strasse Sanitary Engineer and BERNHARD
LILIENFELD, of 4 Magdeburger Platz Merchant, both of the City of Berlin in the
German Empire, do hereby declare the nature of our invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
Our invention relates to improvements in roasting apparatus for coffee, cocoa and
the like the object of the same being to consume the vapors or gases passing off
from the material under treatment and also for collecting the husks or light particles
of the beans. One of the greatest disadvantages of the roasting apparatus for
coffee, cocoa and the like at present in use is, that the gases, which escape with the
light particles of the beans, which in the following Specification we will term
husks, will, whether they remain in the room or pass through the outlet tubes or
chimney into the open air, in consequence of the caustic acids contained in the same
corrode and destroy the tubes which are also choked by the husks; but even if the
damage to the tubes is not taken into consideration the escaping gases have a very
deleterious action on all objects with which they come in contact even after having
left the chimney. Now the subject matter of the present invention relates to a
device by means of which the husks are collected in special boxes or receptacles
and the gases or vapors led the shortest possible way to the grate where the same
are consumed. The pungent smell of the vapors which contain tannic acid and
which generally penetrate into the workshop and neighbourhood is avoided and a
roasting process rendered possible without any unpleasant smell.
Fig. 1 is an elevation,
Fig. 2 a side view with the husk collector in section,
Fig. 3 is a horizontal section on the broken line xx in Fig. 1.
The apparatus, in so far as it relates to the laterally removable roasting drum A,
the hollow shaft C and the driving device, is well known and needs no special
description. The standard c carrying the double bevel wheel p also carries a
bearing for the strap drum shaft C and bevel wheel r for bringing the drum into
the position for emptying or charging the same.
As will be seen from Fig. 2 one end of the hollow shaft C is extended so as to
form a muff or sleeve D with openings d, d and is surrounded by a casing E.
This latter is provided with a tube E' which protrudes into the box or funnel F¹
to the husk collector F the parts being so connected that when the drum shaft is
moved outwards in horizontal direction the tube E' will be out of connection
with the inlet opening but will become again connected as soon as the parts are
moved inwards.
The collector F serves to receive the husks passing off through the openings d, d
whereas the tube G serves to lead off the vapors or gases. The tube G is so con-
structed that it leads the hot vapors or gases immediately beneath the grate where
the same become mixed with the air fed to the fuel on the grate thus producing a
better utilisation of said fuel.
The dampness of the vapors produce a further advantage that the burning
of the fire bars is prevented and the durability of the grate increased.
The draught towards the combustion chamber L (Fig. 1) and the chimney (not
shown) will suck the vapors or gases from the material under treatment from the
drum A, through the openings a, d of the casing E and the collector F into the
furnace.
Alation of the husks will be vented from nessing off with the vanors

page_text: by means of bars in or the portions left between the openings d d so that the same
fall through the box or funnel F¹ laterally of the tube G in the collector F. The
position of the inclined inlet to the tube Ġ in the rear upper part of the collector F
compels the vapors to describe the way indicated by the arrows in order to prevent
the husks being carried with the same.
Any vapor arising from the husks in the collector F is also sucked off into the
furnace so that the husks are dried and prevented from exercising a corrosive action
on the walls of the collector.
The lide of the casing E enables the latter to be opened for cleaning whereas the
door F to the collector enables the husks to be removed.
Having now particularly described the nature of the said invention and the
manner in which the same is to be performed, we declare, that what we claim is :
1). A device for consuming the vapors or gases of roasting apparatus for coffee,
cocoa and the like and collecting the husks, characterised by a service connected to
the hollow shaft of the drum and leading to the furnace in which a collector F is
so arranged, that the husks will be collected beneath the tube G which serves for
leading off the vapors or gases, substantially as described and shown in the
drawings.
2). Our improved device for consuming the gases or vapors of roasting appa-
ratus with or without the husk collector, substantially as described and shown in
the drawings.
3). The construction and arrangement of our improved husks collector for roasting
apparatus, substantially as described and shown in the drawings.
*7601 Idy
D. GROVE,
B. LILIENFELD,
Per W. H. Beck,
115, Cannon Street, London, E.C., Agent.