Year: 1888

page_text: I, HENRY SIMON of No. 20 Mount Street Manchester in the County of Lancaster
Civil Engineer do hereby declare the
of this invention to be
follows:
:-
nature
as
Sieves are sometimes caused to reciprocate rectilineally by connecting them to
cranks eccentrics or cams. Sometimes by connecting them to several equal cranks
equally speeded they are made to move in such a manner that every part of the
sieve has a continuous circular motion.
For certain kinds of materials that have to be sifted it is of advantage to give the
sieve a compound motion which is neither rotary nor rectilineally reciprocating, but
which is such that, while all its parts make the same stroke longitudinally, those at
or near the one end of the sieve move in a nearly circular path, and those at or
near the other end make less stroke transversely, each moving in a path which
resembles an elongated oval. My invention relates to apparatus whereby such a
motion is imparted to a sieve or to a frame carrying several sieves.
For this purpose, I connect the one end of the sieve directly to a crank or
eccentric, and at the other end by a sliding connection to a crank or eccentric of
smaller radius or to a pin free to swivel on a vertical axis, or I joint that end of the
sieve to a radius free to reciprocate in a circular arc. When a sieve is thus driven,
the parts at its one end have a continuous nearly circular motion and at the other
end they have notion in paths each of the form of an elongated oval. All parts of
the sieve are thus caused to make the same stroke longitudinally, whilst the transverse
movement diminishes from the one end towards the other.
When there are several sieves thus mounted and driven, I prefer to arrange the
cranks for all of them on one shaft, setting the cranks at such angles to one another
that the movements of the several sieves balance each other.
1000
ABEL & IMRAY,
Agents for the Applicant.

page_text: I, HENRY SIMON of No. 20 Mount Street, Manchester, in the County of Lancaster
Civil Engineer, 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 :-
Sieves are sometimes caused to reciprocate rectilineally by connecting them to
cranks, eccentrics or cams. Sometimes by connecting them to several equal cranks
equally speeded, they are. made to move in such a manner that every part of
the sieve has a continuous circular motion.
For certain kinds of materials that have to be sifted, it is of advantage to
give the sieve a compound motion which is neither rotary nor rectilineally recipro-
cating, but which is such that while all its parts make the same stroke longitudinally
those at or near the one end of the sieve move in a nearly circular path and those
near the other end make less stroke transversely, each moving in a path
which resembles an elongated oval. In this way considerable movement can be
given to the large quantity of material at the feed end of the sieve, the movement
becoming lessened as the material travelling along the sieve becomes diminished in
at or
bulk.
My invention relates to apparatus whereby such a motion is imparted to a sieve,
or to a frame carrying several sieves, as I shall describe referring to the accom-
panying drawings.
According to one arrangement shewn in side view by Fig. 1, in end view by
Fig 2, and in plan by Fig. 3. For this purpose, I connect the one end of the
sieve A directly to a crank or it might be an eccentric on the vertical shaft B and
at the other end by a pin D to a radius C free to rock on a fixed pivot E. As
shown in the side view partly sectional Fig. 4 the sieve may have projecting from
its end a rod H free to slide through a pin which is free to turn in a bearing G.
As shewn in side view Fig. 5 and plan Fig 6, the end of the sieve may have a
yoke O in which can slide a bush N embracing a crank on a shaft K, this crank
being of less radius than that which works the other end of the sieve. Both shafts
are driven by bevil gear L from one shaft M. When a sieve is thus driven, the
parts at its one end have a continuous, nearly circular motion and at the other end
they have motion in paths each of the form of an elongated oval. All parts of
the sieve are thus caused to make the same stroke longitudinally whilst the transverse
movement diminishes from the one end towards the other.
When there are several sieves thus mounted and driven, I
cranks for all of them on one shaft, setting the cranks at such
that the movements of the several sieves balance each other.
prefer to arrange the
angles to one another
Thus, as shown in the

page_text: side view Fig. 7, two sieves having end guides as described with reference to Fig. 4
are driven by opposite cranks so that the one is always moving opposite to the
other.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
Driving one end of a sieve by a rotating crank and guiding the other end by a
reciprocating radius or sliding rod or yoke embracing a crank of smaller radius,
so as to cause all parts of the sieve to move in oval paths of width diminishing
from the feed end, substantially as described.
ABEL & IMRAY,
Agents for the Applicant.