IMPROVEMENTS IN APPARATUS FOR SEPARATING IMPURITIES FROM GRAIN
Year: 1860

page_text: PROVISIONAL SPECIFICATION left by George Tomlinson Bousfield at
the Office of the Commissioners of Patents, with his-Petition, on the
14th February 1860.-A communication from abroad by A. H. Dixon,
of 171, Pearl Street, New York, U. S. of America.
I, GEORGE TOMLINSON BOUSFIELD, of Loughborough Park, Brixton, in
the County of Surrey, do hereby declare the. nature of the Invention for
"IMPROVEMENTS IN APPARATUS FOR SEPARATING IMPURITIES FROM GRAIN," to be as,
follows:-
In the Drawings, Figure 1 is a side view, the dotted lines representing a
longitudinal vertical section. Figure 2 is a plan view. Figure 3 represents
the shoe and its spring. Figure 4 shows the compound levers for raising or
depressing the cup. In Figure 1, a the casing or framework; 6, the lower air-,
chamber; c, the upper air-chamber; d, the case of suction fan; e, the suction,
fan; e', the fan in the lower air-chamber; g, the cone-shaped cup into which'
the grain falls before it is distributed; h, the pins which serve as guides and
which operate the cast-iron eye; i, i, the cast-iron case around the spindle and
block, which are for the purpose of giving to the grain a centrifugal
and upward motion; j, the levers (see Figure 4) for operating the cup. It will
be seen that one of these levers j is straight, while the other levers are bent
in such a manner that the nuts 1 on their ends may be brought in contact
with nut 1 on end of the first-mentioned lever j; the nuts 1 receive the end of

page_text: thumb-screw lever k, which operates this series of levers; these levers are
pivoted at j', and are also pivoted to the lower ends of pins h. In operating this
series of levers the thumb-screw leverk (which passes through case a) elevates
or depresses the near ends of levers j, consequently depressing or elevating the
further ends, which are pivoted to pins h, thus lowering or raising cup g, for the
purpose of increasing or diminishing the blast; l, a pulley having a belt / for
driving suction fan e; m, flanges on the lower or under side of pulley 1; these
flanges m project below pulley 7, and just escape the bottom of upper air-
chamber. They serve to catch the impurities, and whirling them around
thereby facilitate their removal by the blast in the direction indicated by the
arrow (see post); n, an annular guide for directing the grain into the cup 9.
This guide n is a continuation of or attachment to pulley 1; o, the power pulley;
o¹, its belt; p, the shaker. This is polygonal in section, and hence in its
revolutions shakes the shoe, which, by reason of springs, has a tendency to be
close up to and parallel with one of the faces of this polygonal shaker. r is
a double-cone sheath on the spindle; the upper end of this sheath is made
slightly concave the better to catch and throw off centrifugally the grain.
8
I may find it convenient to add flanges to increase the force of the centri-
fugal action. The sheath is made doubly conical for the purpose of dividing
the current of air from fan e¹ (which is in a line with the widest part of
sheath) into two currents, the one passing down towards and into the eye of
the stone, and the other up through the descending grain, or the whole
current may pass up.
s is a rim surrounding the flanges t on cast-iron rim i.
The object of this rim or flange s is to direct the blast from the fan into a
narrow channel, forcing it to come over the upper edge of this rim and down
through the draft-steadying flanges t to the largest portion
flanges projecting from the under side of cast-iron rim i.
divisions serve to give steadiness to the current of air.
letters designate like parts. f, the receiver whence the air is drawn by the
blast fan e. In Figure 3, q is the shoe; q', the spring of shoe, which
operates against shaker p of Figure 1, and is to prevent noise. In Figure 4,
letters similar to those of Figure 1 are used.
of sheath r. t,
These flanges or
In Figure 2, like
In the operation of my Invention the machine is put in motion operating at
the same time both the blast and suction fans; or, I may find it convenient
sometimes to use only a blast or suction fan. The grain then as it is discharged
from the hopper through guide rim n into cup g, which by its shape gathers
and drops it directly over and on the head of sheath r, or a plate and case as its
equivalent. This distributor r by its rapid rotation gives to the falling grain a

page_text: centrifugal force, throwing it and out in a circular form within the circular
case; the air then passing up around the distributor r meets the grain at this
point, and separates from it all impurities, carrying them up into the upper air-
chamber, whence they are removed by flanges on belt to suction fan e, which
discharges them at the opening indicated by arrow, and the grain falls down
out of the machine cleansed from all impuritics.