IMPROVE- MENTS IN APPARATUS FOR PURIFYING AND SIFTING GRAIN
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Herbert John Haddan at the Office
A communi-
of the Commissioners of Patents on the 12th April 1881.
cation from abroad by Eugéne Dronet, of Birtouta, in Algeria.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVE-
MENTS IN APPARATUS FOR PURIFYING AND SIFTING GRAIN." A communication
from abroad by Eugéne Dronet, of Birtouta, in Algeria.
This Invention relates to apparatus chiefly applicable for purifying and sifting
grain. The apparatus contains three sieves provided with a flange, and forming a
three storeyed box, one side of which is open for the escape of refuse. The ventilator
proper consists of a revolving shaft armed with iron flanges or lugs, to which light
blades are attached. The purifying or sifting apparatus is pivoted, and the pivot
has an adjustable support which allows to balance the apparatus to the right or
left, as may be required. At the side of the pivot there are two cams connected
with the lower part of the upper box in which the grain is placed, and from which
it falls through a small door.
These two cams give to the lower part of this box a to and fro motion, which is
the motion of the purifying apparatus, and causes the grain to fall into the
purifying apparatus; near the outlet and at the side of the latter there are two
small chains attached to the lower sieve, and giving a reciprocating motion to the
latter.
Two other sifters are placed behind the ventilator, and destined for the inferior
grain which comes from the first sifting or purifying apparatus.
These auxiliary sifters are two long boxes placed one over the other, and each
having a sieve at the bottom. One is inclined to the right and delivers the grain
towards this side, while the other is inclined in the opposite direction, and receives
the product from the first box, the grain being delivered to the left, and the small
particles falling to the bottom. The two boxes are set in motion by the shaft of
the sifting or purifying apparatus by means of a vertical straight rod fixed in its
centre to the ventilator by a horizontal rod in such a manner as to allow the to and
fro motion produced by the shaft of the sifters.

page_text: This vertical rod is connected with the shaft of the sifters by means of another
rod placed at a right angle to the former, and they are united by a joint which
permits a motion similar to that of a pair of compasses. The shaft pushes and
withdraws by this joint the vertical rod, and approaches to or removes the other
end from the sifter, which is jointed to another horizontal rod placed at a right
angle to the vertical rod. The horizontal rod is connected with the sifter by an
iron strap, forming two right angles and screwed to the sifters.
The main sifter is connected with the ventilator by means of two straight rods,
each having a joint in the centre, which allows them to move from the right to the
left.
1
The rods are placed horizontally, and connected with the ventilator and sifter
by vertical rods. Everything in this ventilator is in motion, the bottom of the box
which receives the grain, the three sieves of the inner sifter, the lower sieve which
operates with the ventilator, and the two sifters at the rear, the motions being
obtained as described.