Improvements in Combined Grain Scourers and Dust Collectors.
Year: 1893

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by AUGUST HEINE, of Silver Creek, in the County
of Chautauqua, and State of New York, United States of America,
Manufacturer.]
Improvements in Combined Grain Scourers and Dust Collectors.
I, HENRY HARRIS LAKE, of the Firm of Haseltine Lake & Co., Patent
Agents, 45 Southampton Buildings in the County of Middlesex 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 :-
This invention relates to improvements in that class of combined grain scouring
machines and dust collectors which are so constructed that the air currents are
confined within the machine, so that a circulation of air is maintained in the
machine and practically no air is drawn into the machine and none discharged
therefrom.
The objects of this invention are to increase the efficiency of this class of
machines and to simplify the construction thereof.
In the accompanying drawing
:-
Figure 1 is a longitudinal sectional elevation of my improved machine the plane
of section being indicated by line 1-1, Figure 2, and the view being taken in the
direction of the arrow crossing said line above that figure.
Figure 2 is a vertical cross section of the machine on line 2-2, Figure 1, the
view being taken in the direction of the arrow crossing the line 2-2, above that
figure.
Figure 3 is a vertical cross section of the machine on line 3-3, Figure 1, the
view being taken in the direction of the arrow crossing the line 3-3, above that
figure.
Figure 4 is a fragmentary longitudinal section of the rear portion of the machine
on line 4-4, Figure 3, the view, being taken in the direction of the arrow crossing
the line 4-4, above that figure.
Figure 5 is a fragmentary cross section, similar to Figure 3, showing the
machine provided with a single air leg, instead of the two air legs shown in
Figure 3.
Like letters of reference refer to like parts in the several figures.
A represents the scouring case arranged horizontally in the upper portion of the
machine below the deck or top plate b of the enclosing frame B of the machine.
The lower portion a of the scouring case is semi-cylindrical in form and imperforate,
while its side portions a' a' which extend upwardly to the top plate bare perforated.
C represents the feed hopper which delivers the grain to be scoured into the
scouring case at one end thereof and which is provided with a slide c, or some other
suitable feed device, by which the delivery of the grain into the scouring case is
regulated.
d represents a horizontal shaft which extends through the scouring case, and
D represents beaters which are arranged lengthwise in the scouring case, and
secured to the shaft by spiders d'.
The beater shaft is arranged axially, or nearly so, with reference to the lower
semi-cylindrical portion of the scouring case, so that the beaters rotate in proximity
to the lower portion of the case while they are farther removed from the upper
portions of the case and from the top plate of the machine which forms also the
top of the scouring case. This plate may be provided on its underside with
brushes E, as shown, or with some other suitable scouring device, for instance corru-
gated plates. The beaters are obliquely corrugated or ribbed on their faces, as shown

page_text: at f, in the proper direction to propel the grain from the inlet end of the scouring
case toward the opposite end thereof. These corrugations or ribs may be
rectangular, rounded or otherwise shaped in cross section, as may be preferred.
G represents the upright head wall or board of the machine which closes the
head end of the scouring case and extends to a considerable distance below the
same. G'represents a similar vertical wall which closes the rear end of the scouring
case. This rear wall is provided adjacent to the lower portion of the scouring case
with an opening g through which the scoured grain is discharged from the latter.
The rear wall is also provided with an opening arranged concentrically with the
beater shaft and made of such diameter that the beaters are arranged further from
the axis of rotation than the edge of this opening, so that the rotation of the beaters
propels the air contained in the scouring case outwardly and draws the air into the
Scouring case through this opening or eye h. The latter is provided with a short
tube or collar H which is secured therein, and projects into the scouring case, and
the beaters are provided on the inner sides of their tail portions with a tube H¹
which surrounds at its tail end the collar H. The latter prevents the escape of
grain through the eye and also conducts the inflowing air into the tube H', which
latter in turn delivers the air near the middle of the length of the scouring case
and so serves to distribute the air lengthwise through the same.
I represents an ascending air leg which is arranged in rear of the grain discharge
opening g of the scouring case and into the lower portion of which the grain is dis-
charged from said opening. This air leg communicates at its upper end by a
narrow opening i with an air chamber 11 arranged in rear of the eye of the
scouring case, so that a slight ascending air current can pass upwardly through the
leg and into said eye. The opening i is controlled by an adjustable valve ¹ and
the leg is preferably provided below said valve with oblique partitious which
intercept any heavy material which may be lifted by the air current flowing
upwardly through said leg. The latter is provided at its lower end with an
inclined shelf upon which the grain falls and from which it drops into a receiving
hopper J which is provided with an automatic valve j¹ by which the grain is
discharged.
K represents an ascending air leg which is arranged on the outer side of the air
leg I and which communicates at its lower end with the air leg I and the hopper J,
and which extends horizontally over the top of the air leg I and the air chamber I',
to the opposite side of the machine, where it descends to a chess hopper K' and
then takes an upward turn and opens into the air chamber I'
L represents the dust separating chamber arranged below the scouring case and
extending upwardly on the outer sides of the upper perforated portions of the
scouring case to the top of the machine. The lower walls of this dust separating
chamber preferably converge downwardly to a conveyor or other device by which
the separated dust is removed. m represents the air escape opening of the dust
separating chamber, formed in the rear wall G' thereof, below the rear portion of
the scouring case, and opening into an air chamber M which is located below the
air chamber and which communicates by an opening O with the grain receiving
hopper J.
P represents deflecting boards which extend from the lower portions of the
scouring case downwardly into the dust separating chamber and which are fitted
with their front and rear ends to the front and rear walls G G¹, thereof, and
separated at their lower ends by an opening p. The upper portions of the
deflecting boards are arranged outside of the air escape opening m of the dust
separating chamber.
9 is a deflecting board or curtain arranged at a short distance inwardly from the
perforated wall a on that side of the scouring case on which the beaters have an
upward movement. This curtain prevents the beaters from drawing in air on that
side of the scouring case through the perforated wall a', which might take place in
the absence of the curtain by reason of the trend of the air current in the upper
portion of the scouring case toward the opposite wall a³ thereof.

page_text: case.
In the operation of this machine, the beaters operate at the same time as part of
the scouring mechanism and as fan blades by which the air current is set in motion
which circulates in the machine. The grain, which is delivered into the scouring
case at one end thereof, is scoured in its passage through the scouring case, and
the liberated dust is driven through the perforated portions of the scouring case.
together with the air set in motion by the beaters, into the upper portions of the
dust separating chamber on the outer sides of the perforated portions of the scouring
The dust and the air descend in the dust separating chamber and the air is
compelled by the deflecting boards P to travel nearly to the lower portions of the
dust separating chambers, where the air takes an upward turn and passes upwardly
through the opening p between the lower ends of the deflecting board, and ascends
through the space between said boards to the air outlet opening m through which it
passes into the air chamber M. From the latter it passes through the opening O
which is located underneath in inclined shelf j, into the upper portion of the grain
receiving hopper J, where it passes upwardly around the lower edge of the inclined
shelf over which the grain escapes downwardly, the air now takes an ascending
course and carries off the dust and other light material which is commingled with
the escaping grain, and then flows upwardly through the air leg K to the eye of
the scouring case, depositing on its way the heavier grade of the material in the
chess hopper K. A slight air current is drawn upwardly through the inner air
leg I and passes through the opening i thereof to the eye of the scouring case. This
air current carries with it the light dust which it has separated from the grain
escaping through the discharge opening of the scouring case. The relative force
of the volume of the air currents passing upwardly through the outer air leg K and
the inner leg I can be regulated by the valve of the inner air leg.
If desired, the inner air leg, I, may be omitted, and the grain may be dis-
charged from the opening 9 directly into the air leg K, as represented in
Figure 5.
It is obvious that the grain can be moved lengthwise through the scouring case
in a well known manner by oblique ribs secured to the interior of the scouring
case.
Having now particularly described and ascertained the nature of the sa'd
invent on and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is :-
1. The combination with a scouring case having an eye for the admission of an
air current and exits for the escape of the dust and the air, of revolving beaters
which operate upon the grain in the scouring case and draw the air current into
the scouring case through said eye and expel the air and dust through said exits
and a dust separating chamber receiving the dust and air from said exits, and
having an air outlet which is connected with the eye of the scouring case and
whereby the air is returned to the scouring case through said eye, substantially as
set forth.
2. The combination with a scouring case having exits, for the escape of the
dust and air, a grain inlet at one end, a grain outlet at the other end, and an eye
for the admission of an air current at the same end at which the grain outlet is
located, of revolving beaters arranged within the scouring case, and a dust
separating chamber which receives the dust and air from said exits and which
has its air outlet connected with the eye of the scouring case, substantially as set
forth.
3. The combination with a scouring case having exits for the escape of the dust
and air a grain inlet and a grain outlet, and an eye for the admission of an air
current, of revolving beaters arranged within the scouring case, a dust separating
chamber which receives the air and dust from said exits and an air leg which receives
the grain from the scouring case and which communicates at its lower end with the
air outlet of the dust separating chamber and at its upper end with the eye of the
Scouring case substantially as set forth.

page_text: 4. The combination with the scouring case having exits for the escape of the
dust and air, a grain inlet and a grain outlet, an eye for the admission of an
air current, of revolving beaters arranged within the scouring case, a dust
separating chamber which receives the air and dust from said exits, an inner air
leg receiving the grain from the scouring case and connected at its upper end
with the eye thereof, and an outer air leg which receives the grain from the inner
air leg and communicates at its lower end with the air outlet of the dust separating
chamber and at its upper end with the eye of the scouring case, substantially as
set forth.
5. The combination with the scouring case having exits for the escape of the dust
and air a grain inlet and a grain outlet, an eye provided with a collar projecting
into the scouring case, of revolving beaters arranged within the scouring case, a
tube rotating with said beaters and communicating with said collar and a dust
separating chamber, substantially as set forth.
6. The combination with a scouring case having perforated side walls, a grain
inlet, a grain outlet and an eye for the admission of an air current, of revolving
beaters arranged within the scouring case, and a dust separating chamber enclosing
the perforated walls of the scouring case and having its an outlet cornected with
the eye of the scouring case, substantially as set forth.
7. The combination with the scouring case having an imperforate lower portion,
perforated side walls a grain inlet a grain outlet, and an eye for the admission of
an air current, of revolving beaters arranged within the scouring case, a dust
separating chamber enclosing the perforated walls of the scouring case, deflecting
boards depending from the imperforate portion of the scouring case into the dust
separating chamber, and air passages leading from the lower portion of the
dust separating chamber into the space between the deflecting boards and from
the upper portion of said space to the eye of the scouring case, substantially as
set forth.
8. The combination with the scouring case having perforate side walls, an eye
for the admission of an air current and beaters revolving in said case, of a curtain
arranged in said case near the inner side of the perforated wall near which the
beaters have an upward movement, and a dust separating chamber enclosing the
perforated walls of the scouring case, substantially as set forth.
Dated this 13th day of June 1802
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.