Machine for Separating Stones from Coffee Beans or Pods.
Year: 1891

page_text: Date of Application, 13th Oct., 1891-Accepted, 14th Nov., 1891
COMPLETE SPECIFICATION.
Machine for Separating Stones from Coffee Beans or Pods.
I, FERDINAND GOTHOT of Mülheim an der Ruhr, in the German Empire,
Merchant, 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 :-
In Figs. 1, 2, 3, of the accompanying drawing the machine of this invention is
shewn respectively in part sectional side elevation, in end elevation, and in plan.
It consists of an agitating trough A carried on four spring supports and put in
lateral reciprocating motion from a crank, or cam, or excentric worked by hand or
power. The agitating trough is fitted with three angular partitions a, b, c, the two
former with small apertures d, e, at their apices and the latter with small
apertures f,f, near the side of the agitating trough. The apertures are for the
passage of the coffee beans. In front of apertures d, e, there are inclined planes g, h,
and at apertures f,f³, inclined planes i, inclining downward towards the centre
of the trough. Inclined plane g leads downward to a horizontal sieve k serving for
the reception of the stones.
The machine is operated as follows:
The agitating trough is set in horizontal shaking motion, the coffee beans from
which stones are to be separated are then delivered on to agitating trough A from
hopper B the sieve k first receiving them. By reason of the peculiar disposition
of the partitions with the inclined planes in front of the apertures, in conjunction
with the lateral reciprocating motion of the trough A, the large heavy stones are
retained in the sieve recess whilst the coffee beans being lighter pass through
aperture d into the second compartment, where the operation is repeated to deposit
there any small stones that may have passed over into the same with the coffee
beans. These then pass through aperture e into the third compartment and from
here over inclined planes i, i, after leaving all the smaller stones behind, through
apertures ff, into the fourth compartment from which they pass through the end
of the trough at 1 into receptacle D.
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 :
1. A machine for separating stones from crude coffee beans or pods in which the
separating operation is effected according to the specific gravity of the bodies by
means of an obliquely located, transversely reciprocated agitating trough or case
divided by partitions into several compartments, the lighter bodies passing up
inclined planes in front of apertures provided either in the apices or in the side
ends of the angular partitions, and reaching one compartment from another whilst
the heavier bodies are retained in the several compartments, substantially as
described and shewn.
2. In a machine of the kind referred to the arrangement of a sunk sieve or case
immediately in front of the inclined plane of the first compartment of the agitating
trough, for retaining the heavier separated bodies, substantially as described and
shewn.
DLL - 1001
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.