Improvements in Machines for Sifting Corn, Seeds, Roots, Minerals or Chemicals, and other Substances.
Year: 1896

page_text: Date of Application, 22nd Dec., 1896
Complete Specification Left, 22nd Sept., 1897-Accepted, 6th Nov., 1897
PROVISIONAL SPECIFICATION.
Improvements in Machines for Sifting Corn, Seeds, Roots, Minerals or
Chemicals, and other Substances.
We, SAMUEL BRASSINGTON BAMFORD, Engineer, and JOSEPH BATTERSBY,
Freman, both of Leighton Ironworks, Uttoxeter, in the County of Stafford, do
hereby declare the nature of this invention to be as follows:-
Our invention relates to a machine or apparatus for sifting or dressing ground
corn and other substances such as seeds, roots, chemicals or minerals, which sift-
ing apparatus can be attached to metallic grinding mills or other machines, or
used independently.
In carrying out our invention we arrange a fixed cylindrical sieve having a
flat or slightly raised bottom and a cone shaped hopper underneath. Over the
sieve we place a number of brushes fixed on radial arms which revolve with a
vertical shaft placed in the centre of the sieve.
The ground corn or other substance is allowed to fall on to the sieve preferably
from the spout of the grinding mill, the revolving brushes carrying the substance
round the surface of the sieve about three fourths of the circle when that portion
of the said substance which has not passed through the sieve falls through an
opening or slot made in the sieve and down a shoot provided for this purpose.
The finer portion of the substance which passes through the sieve is received
by the before mentioned conical hopper, the said hopper having a central opening
at the lower part for the discharge of the substances therefrom.
The upright revolving shaft is geared to or worked by a belt or chain from tho
main shaft of the grinding mill. In practice we fix a split worm on the shaft of
the grinding mill, the motion being conveyed from the worm through a series
of cog wheels and by a chain or belt to the upright shaft of the sifter. The speed
is thus decreased sufficiently for the slower motion required by the revolving
brushes.
Dated the 22nd day of Decembar 1806
0 Improvements in Machines for Sifting Corn, Seeds, Roots, Minerals or
Chemicals, and other Substances.
We, SAMUEL BRASSINGTON BAMFORD, Engineer, and JOSEPH BATTERSBY,
Foreman, both of Leighton Ironworks, Uttoxeter, in the County of Stafford, do

page_text: 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:
Our invention relates to a machine or apparatus for sifting or dressing ground
corn and other substances such as seeds; roots, minerals or chemicals, which sift-
ing apparatus can be attached to metallic grinding mills or other machines, or
used independently.
1
In carrying out our invention we arrange a fixed cylindrical sieve having a flat
bottom and a cone shaped hopper underneath. Over the sieve we place a number
of brushes fixed on radial arms which revolve with a vertical shaft placed in the
centre of the sieve.
The ground material is allowed to fall on to the sieve, preferably from the spout
of the grinding mill, the revolving brushes carrying the substance round the
surface of the sieve about three fourths of the circle when that portion of the said
substance which has not passed through the sieve falls through an opening or
slot made in the sieve and down a shoot provided for this purpose.
The finer portion of the substance which passes through the sieve is received
by the before mentioned conical hopper, the said hopper having a central opening
at the lower part for the discharge of the substances therefrom.
The upright revolving shaft is geared to or worked by a belt or chain from the
main shaft of the grinding mill. In practice we fix a split worm on the shaft of
the grinding mill, the motion being conveyed from the worm through a series
of cog wheels and by a chain or belt to the upright shaft of the sifter. The speed
is thus decreased sufficiently for the slower motion required by the revolving
brushes.
To enable our invention to be fully understood we will describe the same, by
reference to the accompanying drawings, as applied to a mill for grinding corn
and the like, it being understood that such application is only given by way of
illustration as the invention is applicable to other forms of grinding mills and to
machines for cutting roots and the like. In the said drawings,
Figure 1 is a side elevation of part of the grinding mill having our sifting
apparatus applied thereto :
Figure 2 is a plan of the same with the upper part of the sieve removed:
Figure 3 is a sectional end elevation of the same:
Figure 4 a plan of the sieve with the upper part of the casing and the sieve
removed to shew the supporting grid:
Figure 5 is a sectional elevation of the lower part of the sieve the section being
taken on the line 5-5 of Figure 4.
a is the frame of the grinding mill, 6 is the main driving shaft thereof, c is the
casing containing the grinding discs and d is the spout thereof through which
the ground material is discharged, all of which parts are of well known
construction.
e is our fixed sieve which is flat and supported upon a grid f, shewn clearly in
Figure 4, the said sieve being contained within a removable cylindrical casing g
having a removable cover h, the said cover having an opening at one side for the
reception of the spout d of the grinding mill. The said sieve has an opening or
slot e in connection with a shoot 3.
is the cone shaped hopper arranged beneath the sieve and attached to the
grid f and having a discharge opening at its lower part. is a bracket bolted at
, to the grid f and kis a detachable bracket one end of which is attached to
the bracket, while, the other end is adapted to be bolted to the frame a of the
grinding mill as shewn.
I is a stay bar one end of which is attached to the frame a of the grinding mill
whilst the other end is attached to a lug m on the grid f of the sifting apparatus
the said stay and bracket k serving to attach the said apparatus to the grinding
mill.
n, n, n, n are the brushes fixed to radial arms o, o, o, o attached to a vertical

page_text: hollow shaft p on a stud q fixed to the grid f the said shaft carrying at its upper
end a chain wheel r.
is the slit worm on the shaft of the grinding mill the said worm gearing
with a worm wheel t having attached thereto a spur wheel u gearing with a wheel v
connected to a chain wheel w. The said gear wheels are mounted upon studs,
attached to a plate 3 designed to be secured to the frame a of the grinding mill
shewn. is a sprocket chain passing around the wheels r and w."
The operation of our apparatus is as follows, that is to say, the ground material
from the grinding mill passes through the spout d on to the sieve e, the brushes n, n
which revolve in the direction of the arrow, Figure 2, carrying the material round
the surface of the sieve when that portion of the said material which has not
passed through the sieve will fall through the opening or slot el and through the
shoot The finer portion of the substance which passes through the sieve is
received by the hopper i and passes through the opening in the same.
Instead of the sprocket chain for driving the brushes n we may use a belt or
spur or bevel gearing.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:
1. A machine for sifting ground corn, seeds, roots, minerals or chemicals and
other substances, comprising a fixed cylindrical sieve having a flat bottom with
an opening or slot, a cone shaped hopper underneath the sieve provided with a
discharge opening and a series of brushes fixed on radial arms revolving abova
the sieve, substantially as, and for the purpose, described.
2. The combination with a grinding mill or the like of a sifting machine of
the kind herein before described in which a rotating brush is employed the said
brush being operated from the grinding mill through suitable mechanism,
substantially as described.
3. The combination with a grinding mill of a sifting machine constructed,
arranged and operating, substantially as hereinbefore described and illustrated
in the accompanying drawings.
G. F. REDFERN & Co.,
4 South Street, Finsbury, London, Agents for the Applicants.