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Патент USA US2411072

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NOV' l2» 1946~
s. G. wAsHBuRN
AUTOMATIC IMPLEMENT LÍFT ÍFÜR FLOWS
med nay 27, 1944
v
Patented Nov. 12. 1946
2,411,072
sArEs PATENT orifice
AUTDMATIC
2,411,072
LEMENT LIFT FOR PLQWS
Selden G. Washburn, Goodwin, S. Dak.
‘
Application May 27, 1944, Serial No. 537,686
1
3 Claims. (El. 97---74)
This invention relates to agricultural plows, and has special reference .to one that ~might aptly be
2
mediate of the beam d and the encompassing
bracket 9 provided for the purpose. This bear--
referred to as a beamless plow.
ing also functions as the fulcrum for the leg dur
ing its rocking movement.
The stock of which this leg 5--5 is formed, is'
thereto when engaging obstructing objects such
preferably of round iron to more closely iit into
as large stones or `the like while plowing.
the opposite sides of the sheave 8, and .to limit
Another object is to provide such auxiliary sup
the lowermost permanent Working position of the
porting means of as simple and durable construc
plow, the cross-bar member is formed interme
tion as possible.
10 diate of the opposed spaced members 5-5 of the
Other objects and advantages may appear in
leg and spaning said space so that when the plow
-the further description of .the invention.
has traveled to its downward limit, the cross-bar
Referring now to the accompanying drawing.
l@ will rest Ádirectly upon the sheaye 8.
forming part of .this application and in which like
As control and auxiliary support for the plow
reference numerals indicate like parts: l _
15 I have provided the sort of toggle connection in»
Fig. l is a side elevation of a two-bottom gang
cluding the major bracing members H--l l, one
or sulliey plow embodying the invention and
of which is pivotally attached at its lowermost
showing one of the plows as being in danger of
forward end to the member t of the chassis as at
engagement with an obstruction, asa large stone
I2, and the other attached as at.32 to the mem
or other object, and automatically jumping up 20 ber 2 of the chassis, while the opposite ends of
- and over it.
these braces are pivotally attached as at I3 to the
Fig. 2 is a top plan view of'Fig. 1.
upper arched end of the leg 5--5 land-beyond
Fig. 3 is an enlarged rear elevation of the toggle
which point i3 lthey extend somewhat as at it
equipment for one of the plows, and
where they pivotally carry as at l5 the arm i8
Fig. ‘i is a horizontal sectional view on the line 25 connected at ll to the long arm i8 of the bell
ß-fl of Fig. 1 illustrating the cooperation be
' crank lever, the opposite or short >arm` being illus
tween the guiding sheave holder and the leg of
trated at I9 and the lever pivoted as :at 2li be
one of the plows.
`
.
`
tween the upright spaced and iixed members
In the drawing, I, 2, 3, and Il represent coopera
2|-2I rigidly supported upon the rearmost .ter
.tive parts of one form of practical rigid metal 30 minal of the beam è of the chassis.
chassis 4for .the two-bottom sulkey which is pref
This bell-crank lever controls the raising and
erably made of angle or channel bars commonly
lowering of lthe plow either automatically or by
used for such purposes.
'
hand and for which latter purpose, the forward
The following description will be confined prin
end of lthe chassis is equipped with any suitable
cipally to the near raised plow, which it is
form of hand lever 22 therefor, which of course,
thought, will adequately cover the instant inven
must be' always set with sufficient slack in its
tion as the equipment for a diiferent assembly of
connection to the short arm I9 of the bell-crank
bottoms may vary considerably in chassis con
control lever to permit the automatic functioning
struction.
of the plow when normally at work, such yieldable '
Now, in place of a beam disposed usually hori 40 connection may be in the form of a chain as
zontally and above the plow or plows proper for
shown at 23 or a longitudinally slotted bar, not
drawing same through the ground, the chassis
above referred to, provides such means, and the
Now .the power for the automatic functioning
plow is equipped to function at will, to a, limited
of the plow is provided by the relatively strong
extent at least, independently of the action of 45 contractile helical spring 24 installed within the
the chassis.
leash 40 which is attached at one end .to the for
To accomplish this, I have> provided the elon
ward end of .the chassis as at 25 and at its oppo
gated open link-like leg 5_5 fixed as at B-B to
site end to the depending quadrant 2B fixed to
the heel of the landside 1 of _the plow, said leg
the under side of »the arm I8 of the bell-crank
being reciprocably as well as rockably attached 50 lever, this quadrant being for convenient selec
tive adjustment of the >tension of the spring 25.
to one beam oi’ .the chassis, which in this instance,
as we are describing only the nearer one oi’ the
Obviously, this spring must be of suilicient
plows shown, is the beam 4. This pivotal sup
y strength and normal tautness to hold the arm I8
port comprises the roller or sheave-lilre member
in its lowermost vertical position >when it and the
8 loosely jcurnaled within an odset bearing inter 55 arm I6 are Jackkniied together as shown in con
The principal object is to provide means for
support of a plow that will alleviate the abuse
shown.
,
'
ì
2,411,072
3
4
.
nection with the other plow in the drawing» that
'is at work, and at which time the pivotal con
nection IB is slightly rearwardly oi' the stationary
pivotal point'Zll in the support 2 I-2 I .
- Thus any upward stress at the upper ends of
and according to circumstances and does not
form any part of this invention.
While I haveshown and described one form of
specific novel toggle mechanism for permitting
automatic action of, a plow to prevent its being
the Ibraces Il-i I, for example, byy the colter 30
damaged when an obstruction is encountered,
engaging an obstruction as shown in Fig. 1 of
, it is to -be understood that the same may be varied
materially without departing from the spirit of
the drawing, will tend to open the- jackknifed
‘ the invention as set forth’ in the appended claims.
attitude of theltoggle members just described and
4
‘
permit'the plow to jump over the obstruction 10 What I claim is:
1. In automatic release means for a plow; a
engaged, thence instantly, by gravity, and aid of
supporting chassis'for said plow, a vertically re-.
the spring 24, return to its work in the furrow.
ciprocal rockable beam for said plow carried by
'As a colter for such a plow, I prefer to use the
said chassis and supporting salti plow depend
disk or roller type, as shown at 30, which may
have, as here illustrated, a double supporting 15 ingly therefrom, a roller bearing within and for
said beam, carried by said chassis, a colter car
arm :ii-3l attached pivotally and externally
ried by said chassis and beam and operable with
of the braces iI-II and upon the same pivot
said plow, and means 'associated with said plow
therewith as at I3, thus simplifying the toggle
and colter to cause the colter, when engaging
connection and making it susceptible to func
tioning by the action of the colter as well as 20 an obstruction in advance of said plow, to lift the
possibly by the action of the plow.
These
colter supporting arms 3i-3I
latter over said obstruction.
are
‘
»
2. I_n combination; a frame-like chassis, a plow
`supported by said chassis, an open verticallyV
movable beam supporting Asaid plow from said
termined distance above or forwardly beyond the 26 chassis, a rotatable bearing carried by said chas
sis forming the connection of said beam with
point of the plow. depending upon the type of
said chassis to permit said vertical movement, a
plowing being done and/or the nature of the land
lever pivotally attached'at one end to the for
'beingv worked.
tethered as at 35 to the leg 5-5 of the plow so
that the colter can not move beyond a prede
-
ward end of said chassis and adjacent the oppo
Th‘ese colter supporting arms are also yieldably
attached to the brace Ii above same by means 30 site end pivotally attached to the upper end of
said beam, compound toggle means pivotally at
of the contractile helical spring’36, these arms
also having an auxiliary limiting attachment as
at 31 whereby to insure upward or jumping ac
. tached at the extreme rearmost end of said lever
and supported by said chassis and manually op- -
erable fromvthe forward end thereof for rais
ing and lowering said plow, a colter supporting
tion of the plow as well as the colter after the
latter has engaged a material obstruction that
otherwise might have done damage.
It so happens that in the construction of a
said lever and said beam, and contractile spring
two-bottom chassis as shown, it is advantageous
l means connecting said colter arm with said beam
arm'plvoted at its upper end at the union of - I
to normally keep said colter ahead of said plow
to utilize portions of the toggle bracing in coop
eratively uniting parts of the chassis, and to 40 whereby when said plow and colter are in normal
working position and said colter contacts an ob- ’
which end, one of the braces Il between which
struction in advance of said plow, said plow and
the uppermost arcuate end of the plow leg 6-5
colter will automatically be raised away from said
is pivoted, extends diagonally forwardly over to
obstruction.
'
the other side member 2 of the chassis, and piv
3. In a plow and chassis therefor of the char
otally attached thereto at 3g as previously stated.v
acter described; ' means including a reciprocal
A similar brace 33 functions in alike manner
beam rigidly fixed to said plow and a colter sus
. for the lowered or working plow and is brought
over diagonally therefrom and pivotally attached '. pended from the upper end of said beam and op
erable in advance of said plow for automatically
as at 3l to the side member 4 of the chassis, thus
stabilizing the latter lstructure materially as well 50 raising same from injuriously contacting an ob
struction in the furrow ‘being made by said plow,
as adding support for the plows._
said means furtherv characterized vby being piv
There is suggested at 4I means for attachment
otally guided from the forward end of said chassis.
' to a tractor or other power for pulling the sulky,
_it being obvious that this would vary> considerably
.
SELDEN G. WASHBURN.
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