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Патент USA US2406866

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Sept. 3, 1946.
‘E. s. THOMP-SON
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2,406,866 I
DISK HARROW
Filed Maroh_21, 1944
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2 Sheets-Sheet 1
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.zi'flfes'i‘a Téaw?sajzv INVENTOR
ATTORNEIYS
Sept. 3, 1946.
E. s. THOMPSON
2,406,866
DISK HARROW
Filed March ‘21, 1944
2 Sheets-Sheet 2,
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.31“Weh9%am.‘
ATTOR N EYS
Patented Sept. 3, 1946
2,406,866
UNITED i STATES PATENT: OFFICE
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2,406,866
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‘DISK HARROW
Ernest S. Thompson, Stockton, Calif.‘
Application March 21, 1944, Serial No. 527,428 I
8 Claims;
1
My invention relates to agricultural imple
ments and has among its objects and advan
tages the provision of an improved disk harrow
of the tandem type, wherein novel means are in
corporated for easily and quickly adjusting the
disk units to different relative angular relation
ships as well as laterally with respect to each‘
(Cl. 55-83)‘
The bar, 26 extends through the bar 28, the
members 46 and 48 being spaced su?iciently far
apart to freely accommodate the bar 26 there
between without objectionable vertical play. ,_
The beam 38 is somewhat narrower vertically
‘ than’the‘ member 40,, see Figures 4, 5 and 6, ‘and
is clamped to the‘ member 40. by straps '56, ex
other without changing the spacing between the
tending transversely of‘ the beam and mounted
units, and in which the construction is such as to
on bo1ts_58,‘58a and‘ 60.‘ The bolt 58 is welded
facilitate adjustment of essential parts without 10 to the upper and lower faces“ of the member 46 so
the necessity Of removing bolts and the like.
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as to be. spacedapart agdistance greater than the
In the accompanying drawings:
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vertical width of the beam 38-. The U—.bolt.58a
Figure 1 is a plan view of the invention.
straddles the member 46 and is adjustable longi
Figure 2 is a- vertical sectional view through
tudinally thereof so that, in some settingsof the.
one of the disk units.
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Figure 3 is a sectional view‘ along the line 3-3
of Figure 2.
.
Figure 4 is asectional view along the line,4-—4
of Figure 1.
Figure 5 is a sectional view along the line 5—-5
of Figure l, and
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Figure 6 is a sectional View along the line 6—6
of Figure 1.
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In the embodiment of the invention selected
beam‘ 38, it‘maybe‘ ‘arranged to clear the draw
bar link 86. ‘ Thebolts 60 ‘are also weldedto the
member 40, but to its verticalface, so as to lie
closely to the beam 38, the ?t being such as to
permitsome pivotal movement of the beam 38 on
one or both bolts 60 as a horizontal fulcrum and
relatively to the member 48.
‘ .
One of the bolts 58 includes a strap portion 62
in which is threaded aset screw 64 engageable
with__ the beam 38 adjacent one end thereof.
for illustration, I make use of frontand rear disk 25 While the bars 26 ‘and 28 pivot freely about ver
harrow units l6 and I2. These units comprise
frames l4 and I6, respectively, each supporting
disk soil cultivating tools [8, with the, tools l8
in one unit reversed with respect to the tools in
the other unit. The tools IS .in each unit are
operatively connected by the usual spools 20
mounted on a square shaft, as at 22 in Figure 3.
tical axes, the pivotal connections between these
bars and the respectiveframes I4 and I6 issuch
as to substantially eliminate all pivotal move
ment of the barsabout horizontal axes. Thus,
the frame I6 may.‘ beaccurately adjusted with
respect “to the frame l4, as when arranging the
two frames in a common plane, or when adjust
Such mountings are old and Well known in the
ing the two frames relatively to eachother and
art. Su?ice it to say that the disk tools are
about horizontal axes, if ‘such adjustment is de
mounted for rotation on their respective frames. 35 sired. The ‘clearance between the beam 38 and
The shaft may, of course, be rounded.
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The two units H] and I2 are tied together by
a cross coupling 24 comprising bars 26 and 28
having their ends pivotally connected with the
respective frames l4 and I6.
The bar 26 com
prises a, channel 36 having one end pivotally con
nected at 32 with the frame l6 and a channel 34
pivotally connected at 36 with a beam 38 clamped
the .twos‘ets of bolts 58 issufficient to permit all
necessary pivotal adjustment of the beam 38, and
the set screw 64 functions as a stop which facili
tates pivotal adjustment of the beam.
Lateral adjustment of the frames I4 and I6
maybe made by adjusting the beam 36 longi
tudinallylof the member 40.,‘ Such adjustment
is made‘ by loosening the straps 56 and then
to the rear member 48 of the frame l4. The
shifting the beam‘38 ‘the desired distance rela
two channels 38 and 34 are adjustably connected 45 tively to the member 48. In‘ mounting the beam
together by bolts 42, see Figure 5, extending
38 on the member 40, this member comprising
through openings in one channel and through
the rear structure ‘of the frame l4, adjustment
slots 44 in the other channel, so that the bar 26 '
of the ,beam ' 38 longitudinally of the member
may be adjusted for length.
The bar 28 comprises members 46 and 48 each 50 46 does not alter the spacing between the frames
l4andl6.“
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pivotally connected at 56 with the frame l6 and
‘ A ‘strap 66 is pivotally connected at one end
at 52 with the beam 38. The two members 46
with a. channel bar 66-welded to the front mem
and 48 are ?xedly connected together in prede
ber ‘Ill of the irame‘ll4. The‘ strap'66 is pro
termined spaced relationship by a spacer 54
which is welded to both members, see, Figure ‘6. I
vided with openings" throughout ‘its length,
anda pivot ‘pin 14 is‘ selectively receivable in
2,406,866
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4
openings 16 in the ?ange 68 and one opening
and
I2 toward a more parallel relationship.
the pin ‘I4. The link 86 extends loosely through ’
a guide 98 and has its other end shaped for
of the wheel 98 and is receivable in the groove
I88 as the wheel 98 is brought to its normal
This adjustment is easily controlled through mere
in the strap 66 to pivotally connect the latter
manipulation of the line H2, since the wheel
with the ?ange. By reason of its form, the bar
'98 is rotated only when in driving engagement
68 provides a stiff support for the pin ‘I4.
with the ?ange 96. The two units I8 and I2
A draw bar 18 isrprovided with upper and
may be brought into any desired angular rela
lower ?anges 88 which embrace the strap 66 and
tionship by controlling the driving period of en
which are provided with Openings 82 for selec
gagement between the wheel 98 and the ?ange 96.
tive reception of pins 84 which pass through
A tension spring I24 is connected with the
selected openings 12 in‘ the strap 66 to adjust
ably connect the draw bar with the strap. Thus 10 lever H8 and the frame I88 to normally hold
the lever in the position of Figure 2. When in
the draw bar ‘I8 may be shifted to different po
this position, the wheel 98 is positively restrained
sitions longitudinally of the strap 66, as well as
from rotation through the medium of a brake
connected therewith in different angular posi
band I26 having its ends attached to the frame
tions.
I88 and extending substantially 180 degrees about
A draw link 86 is provided for the frame I6,
the wheel 98. This band is provided with a V
which link has one end pivotally connected at
shaped brake lining I28 which lies in the plane
88 with the end of the strap 66 remote from
selective reception in openings 92 in a ?ange 84 20 position of Figure 2. The wheel 98 is restrained
from rotation in a sufficient degree to be capa
welded to the frame I6.
ble of holding the units I8 and I2 in different
The strap 66 and the link 86 are connected
angular positions.
with the tow ends of the frames I4 and I6, re
When the line H2 is released, the spring I 24
spectively, so that when a pull is exerted on the
jerks the lever H8 back to bring the wheel 98
draw bar ‘I8, the frames I4 and I6 move to the 25 into braking engagement with the lining I28 as
angular positions of Figure 1, with One corner
soon as the pull line H2 is released. The line
of the frame I6 lying in engagement with the
I I4 may be released by imparting a slight pivotal
member 49. A rearward thrust on the draw bar
movement to the lever I I8 from its position of
‘I8 imparts relative movement to the frames I4
and I6 toward parallel relationship, or beyond. 30 Figure 2. This brings the wheel 98 out of hold
ing engagement with the lining I28 so that the
Means are provided for easily and quickly
resistance effective on the rear unit I2 will exert
changing the angular relationship between the
a su?icient pull on the line H4 to increase the
frames I4 and I6 while the implement is in op
angle between the units I8 and I2.
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eration. This means comprises an annular and
Without
further
elaboration,
the
foregoing
35
V-shaped ?ange 96 on one of the spools 28, see
will so fully explain my invention, that others
Figures 2 and 3. This ?ange is coaxial with
may, by applying current knowledge, readily
the spool. Located above the ?ange 96 and in
adapt the same for use under various conditions
the plane thereof is a wheel 98 provided with a
of service.
V-groove I88 contoured in accordance with the
?ange 96 so that the ?ange and the wheel may 40 I1. claim:
A disk harrow comprising a front frame
be frictionally connected by lowering the wheel
98.
The wheel 98 is rotatably mounted on a shaft
I82, which shaft is provided with eccentrics I84
?xed thereto and rotatably mounted in bearings
I86 mounted on a frame I88 attached to the
frame I4. A lever H8 is secured to the eccen
trics I84 for connection with a control line H2
which may be manipulated from a position on
and a rear frame each having a rotative soil
cultivating disk means, crossed bars pivotally
connected with said frames, a draw bar means
r pivotally connected with one end of the front
frame and with the other end of the rear frame
to swing the frames to a predetermined angular
position, and means actuated by cultivating
movement of one of said rotative soil cultivat
the tractor to which the implement is attached. 50 ing disk means for moving said frames to differ
ent angular positions.
Figures 2 and 3 illustrate the wheel 98 as being
2. A disk harrow comprising a front framev
lifted from the ?ange 96, but the wheel may be
moved into driving engagement with the ?ange
96 by exerting a pull on the line H2, which piv
and a rear frame each having a rotative soil
cultivating disk means, vcrossed bars pivotally
connecting said frames, a draw bar means pivot
ots the eccentrics I84 clockwise and lowers the
ally connected with one end of the front frame
shaft I82 suf?ciently far to bring the wheel 98
and with the other end of the rear frame to
into engagement with the ?ange 96.
swing the frames to a predetermined angular po
A line I I4 is attached at one end to the frame
sition, means actuated by cultivating movement
I6 and passes around a grooved guide wheel H6
of one of said rotative soil cultivating disk means
60
mounted on the member 48 and then around a
for moving said frames to different angular posi
guide wheel I I 8 mounted on the frame I88. From
tions, and means mounted on said front frame
the wheel H8, the line H4 passes underneath
in
contact with said third mentioned means for
the hub I28 of the wheel 98 to be wound there
normally maintaining said third mentioned
on. A ?ange I 22 is attached to the wheel 98
and coacts with the Wheel and the hub to pro 65 means inoperative and restraining said frames
from movement with respect to angular dis
vide a spool on which the line I I4 may be wound.
placement.
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To adjust the units I8 and I2 to different rela
3. The invention described in claim 1 wherein
tive angular positions from those shown in Figure
one of said crossed bars is provided with spaced
1, a pull is exerted on the line H2 to bring the
members and in which the other bar extends
wheel 98 in engagement with the ?ange 96. As
loosely between said members for relative move
the ?ange 96 is ?xed to its carrying spool28,
ment in a horizontal plane but restrained from
the ?ange is rotated with the spools and the
relative vertical movement.
.
disks for imparting rotation to the wheel 98.
4. The invention described in claim 1 wherein
Such rotation of the wheel, 98 winds the line
H4 on the spool and brings the two units I8 75 means are provided for attaching said crossed
2,406,866
bars to said front frame for adjustment laterally
of the front frame.
5. The invention described in claim 1 wherein
a beam is mounted on said front frame for ad
justment about a, horizontal axis, and in which
said crossed bars are connected with said beam._
6. The invention‘ described in claim 1 wherein
a beam is mounted on said front frame for ad
justment about a horizontal axis, and in which
ing disk means of the front frame for rotation
therewith, and means mounted on said friction
drive for moving said spool into frictional driv
ing engagement with said friction drive.
8. The invention described in ‘claim 2 wherein
said third mentioned means comprise an annular
drive member ?xed to the rotative soil cultivat
ing disk means of the front frame, a rotative
wheel having a spool means ?xed thereto, a line
said crossed barsare connected with said beam, 10 having one end attached to said spool means and
said beam being adjustable laterally of said front
its other end attached to the rear frame, eccentric
frame.
means mounted on said wheel for moving said
7. The invention described in claim 2 wherein
wheel into and out of driving engagement with
said third mentioned means comprise a spool
said annular drive member, and a brake means
rotatably mounted on said front frame, a line 15 for said wheel mounted on said front frame above
having one end attached to said spool and its
said wheel to restrain the latter from rotation.
other end attached to the rear frame, a friction
drive ?xedly related to the rotative soil cultivat
ERNEST S. ‘THOMPSON.
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