Year: 1885

page_text: I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of this Invention a communication to me
from abroad by Jose Guardiola of Chocola, in the Republic of Guatemala, Central
America, Gentleman, to be as follows:-
This Invention relates to an improved Machine for hulling coffee.
On a fixed horizontal shaft is loosely mounted a sleeve, carrying a disc provided
with a belt pulley on its outer face, and having a slightly conical sheet metal shell
secured by its smaller end to its inner face, a ring being secured on the shell at the
wider end. The shell is provided on its inner surface with projections, buttons, or
nipples which may be produced in various different ways. On the shaft two
wheels are keyed, and are united by wooden staves secured to their rims, and
forming an inner cone parallel with but smaller than the shell. On about one-third
of the periphery of this inner cone steel plates or graters are attached by leather
or other flexible strips, or other hinges in rows extending from end to end of the
cone, so that two-thirds of the outer surface of the cone are smooth or uncovered.
These plates are pressed outwards by springs, and upon the outer surface of the
said plates projections are formed to act as graters. The larger end of the shell is
closed by a circular plate, the ring of the shell revolving around the rim of the
said plate. An inclined chute provided with a hopper, and gate passes through
the inner cone from the upper part of the larger end of the machine, down to the
lower part of the smaller end, and is held entirely by the inner cone. When the
machine is mounted, the chord uniting the ends of the segment formed by the staves
on which the grater plates are held must be vertical or nearly so. The coffee, etc,
to be hulled, is fed into the space at the smaller end of the shell, and on to the
ru 017

page_text: The material is discharged
at a small shoot at the bottom of covering plate at the larger end of the cone, and
moves toward the same by the slant of the shell, and by the rotation of the said
shell.
annular space between the shell, and the inner cone.
In operation, the coffee is taken round by the centrifugal force of the rotating
shell and being moved along by the grating plates they contribute to hull and
polish the coffee in its passage between the plates, and the shell helped by the
projections above mentioned. To prevent the breaking of any of the coffee the
springs placed under the plates yield in proportion to the amount of coffee that is
passed.

page_text: An Improved Coffee Huller.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of'
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent'
Agents, do hereby declare the nature of this Invention (a communication to me
from abroad by Jose Guardiola of Chocola in the Republic of Guatemala Central
America Gentleman) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
This Invention relates to an improved machine for hulling coffee, and the inven- .
tion consists of the combinations of parts substantially as hereinafter described and:
pointed out in the claims.
Reference is to be had to the accompanying drawings forming part of this
Specification in which figure 1 is a longitudinal sectional elevation of the improved,
coffee-huller; figure 1º is a similar section of part of the same the section being.
taken on line 1-1 figure 2; figure 2 is a face view of the smaller end; figure 3 is
a face view of the larger end of the inner section. Similar letters of reference.
indicate corresponding parts in all the figures.
;
The shaft A is fixed in suitable supports so that it cannot revolve, and on it is
loosely mounted a. sleeve B carrying a disc C from the outer face of which a ring.
or annular flange D projects forming a belt pulley. A slightly conical or tapered
circular sheet-metal shell E has its smaller end secured by angle-irons or otherwise.
to the inner face of the disc C, and a ring F preferably made of cast iron is secured
on the shell E at the larger end. The shell E is provided on its inner surface with .
projections, buttons, or nipples a which may be produced in various different ways.
On the shaft A two discs or wheels G are keyed and are united by wooden staves H
secured on the rims and forming a cone frustrum J parallel with but smaller than .
the shell E. On about one-third of the periphery of the inner conical part J steel
plates or graters K are attached by leather or other. flexible strips K¹ or other
hinges in rows extending from end to end of the part E so that two-thirds of the
outer surface of the conical part J are smooth or uncovered. The plates K are
pressed outwards by semi-elliptical or other springs L interposed between the
surface of the part J and the plates K, and upon the outer surface of the said
plates projections bare formed. The free edges of the plates K are slightly curved
towards the staves H. A circular plate M connected with the larger wheel G closes
the end of the shell E, the ring F of the shell E revolving around the rim of the
plate M. An inclined chute N passes through the wheels G from the upper part
of the larger end of the machine down to the lower part of the smaller end and is
held entirely by the part J. A hopper O is formed on the upper end of the chute-N
and a gate P is provided by means of which the chute Ñ can be closed a short
distance below the hopper. A small chute Q is formed on the bottom of the plate M
and is provided with a gate R. When the machine is mounted the chord uniting
the ends of the segment formed by the staves H on which the plates K are held,
must be vertical or nearly so.
the
The coffee etc to be hulled slides from the hopper O through the chute N into
space at that end of the shell E and on to the annular space between the shell E

page_text: and the part J, and the shell E being revolved the coffee is hulled. The material
is discharged at the larger. end of the cone and moves towards the same by the
slant of the shell E and by the rotation of the said shell. In operation, the coffee
is taken round by the centrifugal force of the rotating shell E and being moved
along by the plates K they contribute to hull and polish the coffee in its passage
between the plates and the shell E helped by the projections above mentioned. To
prevent the breaking of any of the coffee, the springs placed under the plates K
yield in proportion to the amount of coffee that is passed.
.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed I declare that what
I claim is;
1. In a coffee huller, the combination with a revolving shell having projections
on its inner surface of a fixed conical part within the shell having grating plates
on its outer surface, substantially as herein shown and described.
2. In a coffee huller, the combination with a revolving conical shell having
projections on its inner surface of a fixed conical part within the shell, grating
plates on the inner conical part and of a chute extending through the inner conical
part, substantially as herein shown and described.
3. In a coffee huller, the combination with the fixed shaft A of the sleeve B, the
disc C, the pulley D, the conical shell E provided with projections on its inner
surface, and of the fixed conical part J within the shell, substantially as herein
shown and described.
4. In a coffee huller, the combination with the fixed shaft A of the sleeve B, the
disc C, the shell E, the ring F on the free end of the same, and the conical part J,
within the shell, substantially as herein shown and described.
5. In a coffee huller, the combination with the fixed shaft A of the sleeve B,
the disc C, the shell E, the ring F, the wheels G, the staves H, and the plate M,
substantially as herein shown and described.
6. In a coffee huller, the combination with the fixed shaft A of the sleeve B, the
disc C, the shell E, the ring F, the plate M having a chute Q, the wheels G, the
staves H, the chute N, and the hopper O, substantially as herein shown and
described.
7. In a coffee huller, the combination with a revolving shell having projections
on its inner surface of a conical part within the shell, plates hinged on the conical
part and provided with projections on their outer surfaces, and springs to give the
plates the proper elasticity in the direction from the surface on which they are
hinged, substantially as herein shown and described.