Improvements in Grain Polishing and Dressing Machines.
Year: 1889

page_text: Date of Application. 19th July, 1889
Complete Specification Left, 17th Apr., 1890-Accepted. 7th June, 1890
PROVISIONAL SPECIFICATION.
Improvements in Grain Polishing and Dressing Machines.
1, WILLIAM DAVIDSON of Mills of Clola, Mintlaw, in the County of Aberdeen,
Miller, do hereby declare the nature of this invention to be as follows:-
:-
The improved machine constituting this Invention whilst applicable to treating
grains generally is especially adapted to the polishing and dressing of oats and barley
and it consists of an upright framing divided into two compartments placed one
above the other and having a short space between them. A shaft extends through
the centres of these compartments being carried in journal bearings above and below
and the bottom of the upper compartment may either be flat or inclined towards the
centre. When flat the opening or openings for discharge of the grain being treated
is or are at the circumference of the compartment and when inclined the said opening
is at the centre. A little above the bottom of the upper compartment a series of
bars or blades is attached to the shaft the said blades or bars extending radially to
the circumference of the chamber. These bars or blades run at a high speed rubbing
the grain in the chamber and also causing the grains or corns to rub against each
other the centrifugal action keeping the grain in a compacted body at the circum-
ference and thus preventing it from being dashed loosely about and shelled. The
grain moves round along with blades or bars and the lower part of the body or
layer of grain moves quickest, the speed diminishing gradually to the upper part of
the layer. To prevent too much grain getting in and choking the machine a self
acting shutter is provided in conjunction with the upper compartment. In the lower
compartiment a fan for winnowing the grain after polishing is attached to the vertical
shaft and to ensure an even current of air across the whole breadth of the outlet
from the fan and to direct the course of the current thin upright blades are placed
at short distances apart a "shuffler "being also placed right above the outlet from
the fan for riddling and carrying the grain outwards to a point where it can be best
acted upon by the air current. In some cases the fan may be dispensed with.
Dated this Eighteenth day of July 1889.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Grain Polishing and Dressing Machines.
I, WILLIAM DAVIDSON of Mills of Clola, Mintlaw, in the County of Aberdeen,
Miller, 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 :-
The improved machine constituting this Invention and which is illustrated in
vertical section at figure 1, in end elevation at figure 2, and in horizontal sections on
the lines a, b, and c, d, at figures 3 and 4 of the annexed drawings whilst applicable
to treating grains generally is especially adapted to the polishing and dressing of
wheat oats and barley.
As shewn by the drawings the improved apparatus consists of upright standards A,
carrying two compartments B, C, placed one above the other with a space between
them. A shaft D, extending vertically through the centre of these compartments
is supported at its lower end in a footstep E, and at its upper end in a journal
bearing F, the shaft being driven by a belt passed over a pulley G, keyed upon it.
The bottom of the upper compartment B, may either be inclined downwards from the
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page_text: circumference towards the centre and have the opening for the discharge of the
grain being treated at the middle or as seen on the drawings the bottom may be flat
and have the discharge opening H, at or near the circumference. A little above
the bottom a series of bars or blades 1, connected to or formed on a boss are carried
by the shaft D the said bars or blades extending radially to the circumference of the
chamber B. The bars or blades which are driven at a high speed rub the grain fed
into the chamber through the passage J, and they also cause the grains or corns to
rub against each other, the centrifugal action produced keeping the grain in a
'compacted body at the circumference of the compartment and so preventing the
grain from being dashed and husked or shelled. By the operation of the blades or
bars the grain is also caused to move round the chamber in which movement the
lower part of the body or layer travels quickest the speed diminishing gradually to
the upper part of the body by which a further polishing or dressing effect is produced.
To prevent too much grain getting into the chamber B, at one time and so choking
the action of the machine the channel or passage J, is provided with a shutter or
slide K which may be self acting.
In the lower compartment or chamber C, a fan L, is secured on the shaft D for
the purpose of winnowing the grain after it has passed from the chamber B, through
the discharge spout or opening H. To ensure an even distribution of the air current
across the whole breadth of the outlet M from the fan chamber this upright sheets N
are placed at short distances apart in the said opening. The spout or opening H
delivers the grain on to a shuffer O, placed above the opening from the fan the said
shuffler being hung on rods or bars P, and reciprocated by a connecting rod R which
is attached to a crank S, secured on the lower end of a spindle T, carried in bearings
connected to the side of the chamber B, and rotated by a belt U, from the spindle D.
The shuffler has a riddle part 01 through which the grain is dropped at a point where
it can be best acted upon by the air current from the fan but in some cases the said
fan and fan chamber may be dispensed with.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The general arrangement and combination of parts constituting the improved
grain polishing and dressing machine hereinbefore described with reference to the
appended drawings.
2. In a machine of the class set forth the combination of a chamber having inlet
and outlet passages rotating bars or blades within said chamber and a reciprocating
shuffler substantially as described with reference to the drawings annexed.
Dated this Sixteenth day of April 1890.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.