Cotton-Chopper Page: 3 of 4
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UNITED STATESPATENT OFFICE.
ROBERT H. COGBURN, OF. McKINNEY, TEXAS.
COTTON-CHOPPER.Specification of Letters Patent. Patented Aug. 10, 1920.
Application filed February 28, 1919. Serial No. 279,808.To all whom it may concern:
Be it known that I, ROBERT H. COGBURN.
citizen of the United States, residin- at
McKinney, in the county of Collin and gtate
5 of Texas, have invented certain new and use-
ful Improvements in Cotton-Choppers, of
which the following is a specification.
This invention relates to new and useful
improvements in cotton choppers.
o The invention contemplates a pair of
horizontal disks having co-acting shearing
edges with registering gaps for receiving
the stalk of the plant and thus leaving a.
regular "stand." Means is to be provided
. for varying the number of gaps and thus
controlling the spaces between stalks left
standing. Vertically adjustable and lat-
erally yieldable shafts carry the cutters so
that their application to the work is under
20 control of the operator and the cutters will
also yield laterally when an obstruction
comes therebetween. One of the features
is an insert for the gaps which may be used
to reduce the size or completely fill the gap.
25 The invention will be more readily under-
stood from a reading of the following speci-
fication and by reference to the accompany-
ing drawings, in which an example of the
invention is shown and wherein:
30 Figure 1 is a side elevation of the chopper,
Fig. 2 is a front elevation,
Fig. 3 is a plan view, and
Figs. 4 and 5 are details of the cutters and
their inserts.
35 In the drawings the nuneral 1 designates
a vertical rectangular frame disposed trans-
versely of the chopper and provided with
inwardly extending journal boxes 2 at each
side. Axles 3 are mounted in boxes and
40 held against longitudinal displacement.
The outer ends of the axles extend from
the frame and are mounted in ground
wheels 4 which impart rotation to the axles
when the chopper is driven forward. Bevel
45 gears 5 are fastened on the inner ends of the
axles with their hubs engaging the ends
of the boxes.
Vertical shafts 6 are disposed in the frame
on each side of the center and are slidable
50 through bevel pinions 7 and horizontal spur
gears 8, the latter meshing. Each shaft
has a keyway 9 receiving a key 10 carried
by the pinion and gear thereof. The pin-
ions are fastened in the gears and each gear
55 has a flanged boss 11 on its upper side
rotatably suspended in a hanger 12 securedto the underside of the top of the frame.
Each shaft passes through a boss 13 on the
top of the frame and has a collar 14 secured
to its upper end and resting on a ' coiled 60
spring 15 which surrounds the shaft and
is supported on the boss. The shafts are
sustained by the springs.
Cutter disks 16 are fastened on the lower
ends of the shafts and overlap at the cen- 65
ter of the chopper. Each disk has a plu-
rality of gaps 17. When it is not desired
to use a gap it is filled by sliding a plug 18
thereinto. To reduce the size of a gap a
U-shaped insert 19 may be .slid thereinto. 70
The edges of the plugs and inserts are
beveled and the edges of the gaps are
shaped to snugly receive the same, so that
the plugs and inserts are held in by fric-
tional contact. The disks are ordinarily 75
used with opposed gaps either open or re-
duced by inserts; while the other gaps are
filled with plugs. The disks are set so that
the gaps of one register with those of the
other where the disks overlap. By this 60
arrangement two plants are left standing to
each revolution of the disks, but when it is
desired to leave the plants closer together
one of the inserts is withdrawn and a plug
substituted and the plugs withdrawn from 6
the other gaps and inserts placed therein so
as to give three gaps to each disk.
A bridle member 20 is disposed between
the shafts and has sleeves 22 at each end
surrounding the shafts and receiving col- 90
lars 21 rotatably confined on the shaft.
A central beam 23 is fastened on top of the
frame and supported by a pair of angular
braces 24 extending from the frame 1. The
braces support a horizontal rock- shaft 25 9b
in front of the frame and foot levers 26 piv-
oted on the shaft extend through the bridle
member and terminate in rear of the frame.
A seat 27 is supported in rear of the frame.
The springs 15 normally support the 100
disks above the ground and the driver by de-
pressing the foot levers 26 may force the
disks down into cutting position. It is ob-
vious that by relieving the pressure on the
levers the springs will immediately raise 105
the disks, thus clearing any obstruction.
Just below the sleeve 22 the shafts include
universal joints 27' and below these joints
the shafts pass through boxes 28 mounted to
slide outwardly in the bottom of the frame 110
and normally held into position by coiled
springs 29. This arrangement permits the1,349,266.
i
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Reference the current page of this Patent.
Cogburn, Robert H. of McKinney, TX. Cotton-Chopper, patent, February 28, 1919; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1259406/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.