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w. F. MacGREGoR
sTÁTIoNARY coNcAvE SCREEN
2,409,292
Original Filed Feb. 12, 1940 `
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IN VEN TOR.
WALL ACE f77/«1 ¿eREeoE , @ECE/1550,
A TTORNEY.
Patented Oct. ‘15, A1946
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2,409,292
, UNITED staresk PAreNroFFlcg ¿
, STATIONARYCQNCAVE SCREEN
Wallace F. MacGregor, deceased, late of Racine,
Wis., by Richard D. Miller, special administra
tor, Racine, Wis., assignor to J. I. Case Com
pany, Racine, Wis., a corporation
1
Original application February 12, 1940, Serial No.
318,504. Divided and this application July 22,
1944, Serial No. 546,078
3 Claims. (Cl. 209-283)
The present invention relates to combination
harvester threshers commonly known as “com
bines," and particularly to the general purpose
type adapted for harvesting grain, beans, peas,
and other crop growths, and which combine may 5
be readily transported and operated by a tractor,
and an object of the invention is to generally improve the construction and operation of devices
of this class, the present application being a
division of applicant’s co-pending application, 1o
Serial 318,504, ñled February 12, 1940, now
Patent No. 2,354,346, July 25, 1944,
A further object is to provide a machine of
this character limited in size and Capable of
eñicient operation with a minimum of manual at- 15
tendance,
A further object is the improved ineens for
eliminating undesirable seeds from the cleaned
grain,
Other objects and advantages will be apparent 2o
from the attaohed speeiiioation and accompany-
ing drawing in which;
Figure 1 is a sectional View teken on the line
I_l of Fig, 2,
Fig. 2 is an elevation of a weed screen attaoh- 25
ment,
2
within bin 4 beneath tube 25| to collect the seeds ,
and prevent their mixing with the clean grain.
In this way the seeds may be separated from the
grain with the addition of very little mechanism
over that already on the combine.
Shaft |73 may be driven in any Suitable man'
ner, in the present instance by the elevator in
housing 93, and it is to be understood that Well
known eXDedientS not Shown are provided for
Supporting the Several Ports in the relations
ShoWn
The above being a complete description of an
illustrative embodiment of the invention, what
is claimed as new and desired to be secured by
Letters Patent 0f the United States is!
1. In a weed screen, the combination of a
tubular housing extendinginasubstantially hori
Zohtai direction» e Conveyor auger in the housing
and disposed to propel grain containing unde
Sirebie Peftioies through Said housing from end
to end thereof by virtue of rotation of said con
veyor auger, said housing providing an opening
in the bottom Wall thereof, asleeve disposed about
said housing so as to cover said opening, said
Sleeve providing a plurality of sets of Screening
perforations of different sizes registerable with
said opening as desired by rotation of said sleeve
on Said housing' Said Sleeve being split length
As seen in Fig, 2, the combine includes a bin
4 for receiving the harvested and cleaned grain,
the grain being delivered from the separating
Wise’ Íianges extending along the margins 0f the
mechanism not shown, by an elevator of con- 3() split in said sleeve and means for forcing the
ventional construction terminating in housing
ñanges toward each other for clamping the sleeve
98, through which passes a shaft |13. The grain
ih Piace on the housing, Said sleeve being freely
is then transported through a housing 25|, Fig
rotatable on the housing when the clamping
1, having an opening 252, in the present instance
means is loose, and a receptacle disposed beneath
by means of an auger 253 mounted on shaft |13, 35 said opening for receiving particles screened from
Auger 253 and its housing 25| are generally
the grain through said perforations.
designated as 250 and serve to transport the
2- In e Weed Soreen, the Combination of a
grain from elevator 98 partially across bin li so
tubular housing eXtending in rasubstantially hori
that the grain deposited in the bin Wiii be
zontal direction, a conveyor auger in the hous
properly distributed,
4o ing and disposed to propel grain containing un
The assemblage in addition to this function is
desirable particles through Said housing from end
adapted to remove undesirable seeds from the
to end thereof by virtue of rotation of said con
cleaned grain. For this purpose, the perforated
veyor auger, Said housing providing an opening
sleeve or shroud 254 encloses housing or tube 2.5i
in the bottom Well thereof. a Sleeve disposed about
and is preferably, although not necessarily ar- 45 said housing So as to Cover said opening, Said
ranged to be clamped thereabout as by flanges
Sleeve providing a plurality 0f sets of screening
255 and 256 which may be forced toward each
perforations of different sizes registerable with
other as by bolts 251-251, sleeve 254 may have
said opening as desired by rotation of'said sleeve
a plurality of sets of perforations 258, 259 and
on said housing, means for clamping the sleeve
260, any one of which may be brought into register 50 in piace on the housing, Seid sleeve being freely
With opening 252 by rotating the sleeve about
rotatable on the housing when the clamping
tube 25|- The perforations may be of several
means is loose, and a receptacle disposed beneath
sizes whereby they may be adapted to pass the
said openingv for receiving particles screened
weed seeds but not the grain being harvested.
from the grain through Said perforations
A receptacle 26| of any suitable form is secured 55
3. In a weed screen, the combination of a
2,409,292
3
tubular housing extending in a substantially hori
zontal direction, a conveyor auger in the housing
and disposed to propel grain containing unde
sirable particles through said housing by virtue
of rotation of said conveyor auger, said housing
4
by shifting of said sleeve on said housing, means
for securing the sleeve in place on the housing,
said sleeve being freely shiftable on the housing
except when the securing means is operative,
and a receptacle disposed beneath said opening
providing an opening in the bottom Wall thereof,
for receiving particles screened from the grain
a sleeve disposed about said housing so as to
cover said opening, said sleeve providing a p1u--~
through said perforations.
.
RICHARD D. MILLER,
Special Administrator of the Estate of Wallace F.
rality of sets of screening perforations of diiîerent
MacGregor, Deceased.
sizes registerable with said opening asy desired 10
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