Improvements in Stones for Shelling or Decorticating Rice, Barley, and other Grain or Seeds.
Year: 1889

page_text: COMPLETE SPECIFICATION.
Improvements in Stones for Shelling or Decorticating Rice, Barley,
and other Grain or Seeds.
I JOSEF WINTER of Aschersleben in the Kingdom of Prussia and Empire of
Germany Manufacturer, 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 and accompanying drawings that is to say:—
In machines used in shelling or decorticating rice, barley, peas, corn, oats and
other grain or seeds natural stones have hitherto been employed such stones usually
being made of sand stono-in the form in each case-of a cylindrical block which
has been solid with the exception of the central eye which has received the axle or the
bush or part whereby the stone has been secured to the axle. As such stones act only
by means of their peripheries thoy are generally worn away only to a small extent as
compared with their diameters as they cannot as a rule be used until greatly reduced
in diameter owing either to the decrease of the circumferential speed resulting from
the lessened diameters or to the fact that the construction of the machine will not allow
of stones less than a certain diameter being used and therefore the greater part of the
bulk of the stone is not utilised.
A further disadvantage arising from the employment of such "solid" stones is that
a proportionately excessive dead weight has to be rotated thereby entailing an
important loss of power.
The object of my invention is principally to obviate the said disadvantages. To this
end in lieu of a solid stone I employ a pulley or central carrier which is covered with
an artificial stone rim made of Emery, Quartz or other suitable material means being
provided for securing the artificial stone covering to the pulley and to prevent it from
bursting when revolving rapidly. In the accompanying drawings Fig. 1. represents a
longitudinal section and Fig. 2 a half side view of a so called stone constructed in
accordance with my Invention. In the said Figs. a is the central carrier which 1 will
term a pulley and is the rim of artificial stone. The periphery c of the pulley a is
provided with a dovetailed projecting ring d at one side such ring fitting into a
corresponding groove in the rim b of artificial stone. At the other end of the pulley
a ring e is secured against the flat face on the pulley end by means of bolts f. This
ringe is dovetailed and also fits a corresponding annular recess in the rim b.
In consequence of this construction of the drum the principal weight is in the rim
as in the case of a flywheel so that there is not so much loss of power as in the case of
a solid stone. The periphery c is connected by means of arms g with a central hub h
whereby the pulley is attached to the shaft. As there are open spaces between the
there is abundance of room for the free circulation of air so that the stone is
kept much cooler whilst at work than in the cases of the ordinary solid stones which
is an additional and important advantage.
arins g
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. In shelling or decorticating machines the combination of a metal pulley with a
rim of artificial stone which is adapted to operate on the substance to be shelled or
decorticated substantially as and for the purposes set forth and indicated.
2. The pulley a having a periphery connected by arms with a hub h so as to provide
free space for the circulation of air the said pulley being provided with a rim 6 of
artificial stone substantially as and for the purpose set forth and indicated.

page_text: 3. In drums of the indicated nature the method of securing the artificial stone rim
to the periphery of a metal pulley by means of dovetail rings and grooves substantially
as set forth and indicated.
Dated this 13th day of August 1889
DUTTON & FULTON,
1, St. James Square, Manchester, Agents.