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Патент USA US2105481

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Jan. 18, 1938.
Filed Feb. 11, 1956
NR]VRNEo?M?. u.Tm. SunMN
Patented Jan. 18, 1938
units!) states PATENT OFFICE
Leonard Johnson and’ Martin A. Rieman, Minne
apolis, Minn, assignors to Hart-Carter Com
pany, Peoria, 111., a corporation of Delaware
Application February 11, 1936, Serial No. 63,349
2 Claims. (Cl. 209-95)
Our' invention relates to the separation of in which case with the improved compound val;
grains and particularly to the’ separation of ley and ridge-forming corrugations‘ the different
grains by the use of rotary drums; the invention type of separation above indicated, or hereinafter
consists in providing the drum with corrugations more fully described, will take place.
of‘novel‘ formation whereby novel and highly im
As best shown in Fig. 3, the drum is corrugated :3
portant results are obtained.
to form the valleys and intervening. ridges. The
Hitherto grain separating drums have been valleys are deep and narrow and their walls di
provided with indentations or pockets designed verge slightly so that the grain received therein
to receive certain kinds of grains and to reject will be gravity held but not frictionally held.
‘ other kinds of grains, according to the varying
The ridges 9 formed between the valleys 8 are
lengths or general" formation thereof but not also of novel design, and they extend from lines
solely by the thickness thereof. ‘In this speci?
marked “a” to lines marked “b”. The valleys
cation and’ in the claims we use the term “thick
proper terminate on the lines “a” and the ridges
I ness’f to indicate, or to mean, the narrowest or
begin on these lines and converge to lines “D”
smallest dimension‘ of the grain kernel.
that form their salient angles. The width of 13
In accordance with our invention the drum the valleys 8 will vary in" di?erent' machines‘ac
is corrugated longitudinally to form, on the inner cording to the kind of operations to be accom
surface of the drum, long valleys and interven
plished. If, for example, the function to be
ing ridges. These ridges may, and preferably are, performed is the operation of thin or shrivelled or
extended from end to end of the operative sur
undeveloped oats from relatively thick and well a V
face of the drum. The nature of these novel developed oats then the valleys should be just
corrugations and the functions that they perform wide enough to receive the relatively thin grain
will be more apparent after having ?rst described when the kernels are extended longitudinally in
more in detail a commercial form of the im
the valleys, but not wide enough to receive the
25 proved corrugated drum.
relatively thick oats.
Referring to the drawing which illustrates the
When the mixed or commingled grains of vari
invention and wherein like characters indicate ous thickness are fed into the drum, and the
like parts throughout the several views:
drum is rotated, the grain will be carried upward
Fig. 1 is an elevation of the improved drum on the rising side of the drum and will roll back
30 some parts being broken away and some parts
ward over the ridges under the action of gravity. in
being sectioned.
While the grain kernels, which we have assumed
Fig. 2 is a fragmentary plan view looking at
the inner surface of the drum.
Fig. 3 is an enlarged transverse section taken
35 on the line 3—3 of Fig. 1, and
Fig. 4 is the section taken on the line 4-4 of
Fig. 3, some parts being broken away.
The drum illustrated comprises a sheet metal
shell 5, and open heads 6 and 1. The drum, as is
40 obvious, may be supported and operated in var
ious different ways but may be assumed to be a
drum of a grain separating machine of the type
disclosed and claimed in the Ingraham Patent
to be oats, get parallel to the valleys, the rela
tively thin cats will fall into the valleys and
will be carried upward to a point high enough
for the discharge into the receiving trough, not Ju
shown, but which, as stated, would be provided
in the machine of the type indicated.
It is important to note that the ridges 9 slant
back from their salient edges “1)” toward the two
adjacent valleys, so that the oats or other grain
rolling down the incline will tend to become par
allel to the valleys. When the grain, assumed to
#2,015,400, dated Sept. 24, 1935. The drum of
be oats, get parallel to the valleys the shrivelled,
poorly developed and relatively thin oats will drop
pockets which reject long grain such as oats, for
into the valleys while the thick oats will not enter
the valleys but will be rolled back toward the
bottom of the drum. The ridges formed, as de
45 that machine is provided with indentations or
example, but pick up wheat and carry the same
to a high elevation where the latter will be dis
charged from the pockets into a receiving trough
50 thereby accomplishing the operation of relatively
short from relatively long grain but irrespective
of the thickness or smallest dimension of the
grains. In a general way it may be assumed
that the improved drum may be used as a sub
55 stitute for the drum of the Ingraham patent but
scribed, carry the grain in such a way as to pre
vent the grain caught in the valleys from being
swept out of the valleys.
The thin or narrow grain, regardless of length,
lodged in the valleys at the lower portion of the
drum will, under the action of gravity, be held
in the valleys until the valleys have reached an
elevation at which gravity, instead of holding the
grain in the valleys, will dislodge the grain and ' or for the operation of different commingled
grains wherein it is desired to take out of the
cause the same to be “poured ou ” of the valleys
and into the trough or catch receptacle within mixture relatively thin grain irrespective of
the drum. Under rotation of the drum, and length.
What we claim is:
Cr especially when the drum is rotated at consider
1. A grain separating drum having longitudi
able speed, centrifugal force will also tend to
hold the grain in the valleys; and in fact, the nally extended, relatively narrow but ?aring sub
grain will be held in the valleys until the latter stantially symmetrical valleys adapted to receive
have reached such elevation and their walls grains transversely of their length and relatively
wide and shallow intervening ridge-like portions
10 changed their angular position in respect to ver
adjoining the upper edges of the valley walls at
tical, to such an extent that ‘gravity will over
thereto and providing oppositely inclined
come centrifugal force and the sliding friction
relatively long and ?at rolling surfaces which
of the grain and cause the same to slide or roll
out of the valleys into the trough or receptacle. are substantially symmetrical and on which
grains are caused to roll about their longitudinal
The diverging walls of the valleys, however, pre
vent the grain from being wedged and frictionally axes toward said valleys upon rotation of the
held in the valleys, and hence, the discharge drum.
2. A grain separating drum having .two alter
thereof will be as above stated.
series of valleys and ribs which extend lon
As has been stated,lthe valleys 8 actually ter
gitudinally thereof, the walls de?ning the valleys
minate on the lines “a”. It will be understood
that the width of the valleys is determined by being substantially symmetrically arranged and
the distance between the lines “a—al”, and that flaring apart a distance slightly greater than the
the reversely beveled, or inclined surfaces of the transverse dimensions of grains to be received
therebetween from adjoining ribs and said ribs
ridges are beyond said lines “a”.
oppositely inclined substantially sym
With the valleys and ridges extended from, or
approximately from, end to end of the operating metrically arranged wall portions each being of
surface of the drum, all of that drum surface is substantially greater width than the width of
said valleys and of such heighth and inclination
rendered effective for accomplishing. the opera
with respect to the valley walls as to provide
tion by the thickness above described. Obvi
ously, length of the grain or material does not substantially flat wall surface portions on which enter into the operation, inasmuch as the thin grains are caused to roll about their longitudinal
long grain kernel will get into a valley as readily axes toward the adjacent valleys depending from
said portions upon rotation of the drum.
as a shorter one of the same thickness. This
type of operation is highly important for the
' operation of not only thin and thick oats but
thin and thick barley and thin and thick wheat
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