Cheraw gazette. [volume] (Cheraw, S.C.) 1835-1838, 1837-03-28

arts.
"A solid stick of oak, oblong, mounted
on four legs, supported above and below
by traverses, constitutes the frame which
bears the different parts of the new me-
chanism nearly all disposed on the length
of the upper travcrses. These are conn.,
posed of cylinder of wood, suitably pre-.
pared; it is Is inches in diamater, and
eight inches broad, and armed on the Cir
cumference with 50 teeth inches long
The axis of the cylinder bears at one end
an iron pinion furnished with 10 teeth,
which fit in those of wheel, also OF iron,
having 12O teeth. A handle Is inches
long is placed at each end ofthe axis ofthls
last wheel. Under this cylinder is placed
sort of box, inclined so as to send back
the pulp obtained into trough used as
recipient. On the same end of the stick,
and before the circumference of this CYL
inder, is added, on a movable centre, a
sort of wooden flyer which receives from
the axis of the plnion, and, by the aid ofa
see-saw, traversing motion to and fro, in
such way that the space between the
cylinder and this flyer for the passage OF
the substance 10 be rasped is alternately
closed and open. The opening always is
limited by small bar, on which the flyer
in its recoil is stayed. All the parts of the
machine which are without the stick are
covered with box surmounted by hop
per capable of containing at least a quln-
tai. By this machine the contact of the
beet with the rasp is effected very quickly,
without any splashing or waste.
Expression of the Sugar.
The beets reduced to pulp by the ac-
ton of the rasp must be then pressed TO
separate the liquid part from the pulp or
vegetable fibre. To this end they arc put
under a press. Any kind of press may be
employed for this purposc.-Thus in these
labors it ofen happens that one and the
same press is issued for the pull of the beet
and the produce of the vineyard. Howcv-
er, the object in submitting the pulp of the
bcets 10 the press being to extract the grca-
test quantity possible ofthe juices they con-
tain, it is necessary to subject them to con-
siderable power Of pressure, which It's har.
div permitted 10 hope for with such an ap-
paratus.
The presses most generally used are
strong screw presses which only differ from
the wine presses in being constructed with
more carc.-These machines are too well
known to make detailed description neces-
sarv.
We have tried cylinder press Of NJ.
Lauvergnat. which has also been adopted
in some factories. 1t is composed of two
slperposed cylinders. They are in plane
slightly inclined. The. lower cylinder is
cast.iron with a wrought iron axis. The
upper cylinder is wood, its axis also oflron.
These two axes turn i'll copper pads, which
are movable IN a vertical direction, in or
der to be able to close the upper cylinder
more or less on the lower one by two COM
pressing screws. These cylinders receive
a movement equal, and in opposite dlrec-
tons. Between the two cylinders is placed
a cloth without end, made ofstrong canvas.
This cloth is extended over several points Of
the machine by four wooden rollers, which
keepit in place, and one of them is so dispo-
scd that itsupports one part in horizontal
position.
On this part of the cloth the substances
about to undergo the compression, come, by
passing through the cylinders. For this
purpose box without bottom is placed on
the horizontal part ofthc cloth, designed to
receive the matter to be pressed. Beneath
the cylinders, is q second box or tray, into
which the expressed juice flows. The pulp
thus enters one side Of the cylinders and
goes ou, at the other, exhausted of its liquid.
his machine, which on tine whole is very
ingenious, hasthe disadvantage of not press.
ing the paste sufficiently to extract all the
LIQUID; so that the pulp must be submitted to
a second pressure under a screw press.
This happens for the reason that the cylln-
dcrs cannot be closed on one another bu TO
a certain point. If they are toonear, but
small portion of pulp passes, very thin,
which makes the operation much too long.
Some manufacsurers, have uscdthc double
prese Of NJ. Isnard. IN this kind ofpress, the
screw, iastead of being vertical, is placed
horizontally. Ateach end of this screw is
fixed plate, against which iais supported.
The nut is in the middle Of the screw, which
receives a recnear motion TO and fro, in
such manner that when loosed from one
plate it exercises pressure on tbs opposite
one. The position Of the screw, and that
OF the matter to be pressed, render the work
ing of this machine very convenient. 1t
produces otherwise but moderate effect,
and seems TO be generally given up.
Of all the methods to obtain a strong
pressure, the most efectual is, doubtless the
hydraulic press, which, as is well known,
. 4 ! H. I,,-J...fo+,o M