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Патент USA US2110984

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March 15, 193..
L, uBuRKEs
Filed Dec. 30, 1936
3 Sheets-Sheet l
Zea E‘Bza rii‘as,
Ba???” 19W?‘
March 15,
A iiorneys
March 15, 193.
Filed Dec. 50, 1936
5 Sheets-Sheet 3
l| , ~
Attomg'ys I
Patented Mar. 15, 1938
Leo U. Burkes, Richton, Miss.
Application December 30, 1936, Serial No. 118,415
5 Claims.
,Tlm's invention relates to soil conditioning and
cultivating machines and has reference in par
ticular to what may well be called a convertible
type harrow, that is, one which may have its
multiple spring teeth arranged to function as a
customary V-shapedstyle, or may have the teeth
obliquely angledwith respect to the line of draft
to perform as a so-called side harrow.
numerals are employed to designate like parts
throughout the various views:
Figure 1 is a top plan view of the complete
multiple purpose or convertible barrow con
structed in accordance with the principles of the
present invention showing the old as well as the
new features.
Figure 2 is a side elevational View of the rear
“structurally. Visualized and compared with
end portion of the arrangement depicted in Fig
prior. art harrow constructions, it will be observed
that the adopted harrow is characterized by a
frame unit, a beam intersecting and adjustably
connected to the central portion of the frame
unit, bracing means for the beam, and steering
andmanipulating handles. for the walking at
tendant, there being a plurality of spring teeth
connected with and dragging behind said frame
underneath of the handle.- This general struc
tural arrangement is, of course, common to the
ure 1 calculated to show to advantage the gen
eral relationship of the horizontal beam with
respect to the spring teeth and improved holding
means therefor.
Figure 3 is a bottom plan view of the ractangu
lar frame unit showing the two distinguishable
positions of the adapter blocks, the stirrup clamp
teeth are provided for conversion results.
The essence of the present invention is re?ect
ing means being omitted for clearness of illus
tration, one block being disposed at right angles
and the other at oblique angles.
Figure 4 is a top plan view of one end portion
of Figure 3, that is, a view observing the right
hand end portion of Figure 3 with certain of the
other features omitted for clearness of illustra
ed in the adoption and use of a substantially rec
tion of parts.
trade and it is also a matter of common knowl-.
edge that quick detachable and adjustable spring
Figure 5 is what may be called a full size view
tangular frame unit provided with a plurality of
improved bodily adjustable clamps so constructed
of one of the multiple lug-equipped adapter
as to serve as stirrup-like hangers for the shank
blocks or members.
Figure 6 is a section taken on the plane of the
portions of the spring teeth, the clamps and
frame unit being so constructed as to permit the
teeth to be disposed at direct right angles to the
frame unit for individually or collectively adjust~
ing to assume substantially oblique angled posi
tion with respect to said frame unit.
Stated more speci?cally, the chief novelty re
sides in the provision of a frame unit character
ized by spaced parallel bar members having their
lower edges formed with keeper notches to selec
tively accommodate distinguishably usable reten
tion lugs on the block-like adapter forming part
4 0 of the clamping means, said adapter being sad
dled in the hanger stirrup or ?xture which is, in
turn, secured by set screw or the like to asso
ciated retaining means cooperable with the bars
of said frameunit.
Although novelty is predicated on the notched
bar construction of the frame unit as well as the
stirrup-like hanger members, the speci?c novelty
in chief has to do with the multiple lug-equipped
block-like adapter which is in effect the holder
(Cl. 55—152l)
for the shank portion of the associated detach
able spring tooth.
Other features and advantages will become
more readily apparent from the following de
scription and drawings.
55 . _. In the accompanying drawings wherein like
line 6-~6 of Figure 1.
Figures 7, 8 and 9 are additional sectional 0
views, on an enlarged scale, taken on the planes
of the lines l—'l, 8-8 and 9—9, respectively, of
Figure 1.
Reference is had ?rst to the general assemblage
depicted in Figure 1 of the drawings. Here the
spring teeth are denoted by the numeral ill and
have downturned hooked ground-engaging ends
l I as shown in Figure 2. This is, normally speak
ing, a ?ve~tooth harrow and the forward ends or
shank portions of the teeth Iii are adjustably
clamped in holders carried by the aforementioned
rectangular frame unit 12. The numeral i3 des
ignates the brace while the numeral it indicates
the beam to the forward end of which the source
of propulsional power is connected. The cus 45
tomary attendant-controlled handles 15 are
shown at the rear. The intermediate portion of
the beam intersects the central portion of the
frame unit l2 and is adjustably attached to the
slotted extension or ?ange It’ as indicated at the
point ll.
Reference being had now to Figure 3 it will be
observed that the ever important frame unit I2
is of general rectangular or longitudinally elon
gated form and includes spaced paralleLsup
porting bars or members 18 having keeper notches
l9 and 20 formed in the lower surfaces or edges
thereof and arranged in diagonal staggered rela
is clamped ?rmly down on the upper edges of
29. It also effectively binds the shank of the
tooth in the channel 22 thus providing the de
sired holder or clamping means for the tooth.
The adapter block is denoted by the numeral
2| and is of general rectangular form. As shown
to advantage in Figure 3 the bottom of the block
is formed with a channel 22 in which the shank
of the tooth ?ts sliolably so that the tooth can
10 be adjusted to position the hook or tooth element
H toward or from the frame I2. It will be
noticed in Figure 5 that one end, that is, the rear
end of the block is indicated by the numeral 23,
while the diagonally out or oblique forward end
is differentiated by the numeral 24. A pair of
transverse spaced parallel stabilizing cleats '25
are provided on the attaching side of the block,
one of the cleats being close to the rear end 23
and the other one at the center of the block and
20 both cleats being parallel to each other and par
allel to said edge 23. Cooperable with these cleats
are pairs of lugs 25 extending at obtuse angles in
relation to the transverse cleats '25. The effect of
these two sets of lugs 26, which function as teeth,
is that said lugs are substantially oblique to the
longitudinal dimension of the block 2! as a unit.
The numeral 21 designates supplementary cleats
disposed parallel to each other and in parallelism
with the correspondingly inclined or oblique edge
24. A group of three teeth or lugs 28 cooperate
with these cleats 21. It follows that the teeth 26,
that is, both sets, and the cleats 25 function
simultaneously. These are used alternately with
respect to the cleats 2'! and their associated prop
erly angled teeth 28. The teeth or lugs 28 by the
way are substantially straight with respect to
the longitudinal dimension of the block 21 .
gist of the idea, however, is to be able to use the
selected sets of teeth with respect to predeter
mined keeper notches 59 and 20 in the bars l8
as shown in Figure 3 to get the desired prede
termined angular position of the adapter block
2| with respect to said bars l8. For example, in
Figure 3 at the right it will be noticed that the
teeth or lugs 26 are then engaged with the keeper
notches l9 and 20. This positions the edge 23
?iush with the bars I8, disposes the cleats 25 in
contact with the inner surfaces of the bars I8 as
shown in Figure 4, and positions the block 2| as
a unit, at right angles to the longitudinal dimen
sion of the frame unit l2. It follows that when
the adapter block is in this position the shank
portions of the teeth ID are at right angles to
said frame unit l2. Then by shifting the block
2| the teeth 28 may be engaged with the notches
l9 and 20 at which time the oblique edge 24
matches the bar l8, positioning said adapter
block 2| diagonally and throwing the teeth ID in
the same diagonal position with respect to the
60 frame unit l2.
Attention is now invited to the hanger ?xtures
for adapter block 21. Each ?xture is the same
in construction and is denoted by the numeral
' 29 as shown to advantage in Figure 6. This ?x
65 ture 29 is a frame the upper portion being ?tted
to embrace the suspension clip 39. This clip 30
rests on the upper edges of the bars I9 and, there
fore, suspends the hanger ?xture 29 between the
bars so that said hanger ?xture is in a position to,
70 in turn, suspend the adapter block 2!. In fact,
the adapter block is saddled in a stirrup-like
manner in the lower hanging portion of this
clamping hanger 29. Attention is also called to
the set screw 3|~ engaging the suspension clip or
75 element ‘30.
By tightening the screw the clip 39
the bars l8. At the same time it binds the se
lected lugs 26 or 28 in the keeper notches l9- and
It follows, therefore, that the holder comprises
the adapter block 2| adjustably connectible by
its teeth 26 and 28 to the keeper notches l9 and
29 through the instrumentality of the set screw 10
clamping means 29. By using the simple hanger
clip or suspension element 30 and the set screw
3| and frame hanger 29, the feature 29 can be
axially adjusted in conjunction with the toothed
block or adapter 2| to satisfactorily obtain either 15
of the two set positions shown in full lines in
Figure 3.
It follows that with this adjustable tooth
clamping or holder means it is possible to proper:
ly arrange the teeth ID to function either as the 20
conventional ‘V-shaped harrow or angled with
respect to the line of draft to serve as a so-called
side harrow.
Attentionis invited to Figure 2 wherein it ‘will
be observed that the numeral 32 designates an 25
arm adjustably mounted by a so-called rosette
clamp 33 on one end. of the frame 12. This arm
carries a blade 34 which constitutesa dirt shield
located between two of the spring teeth‘to facili
tate the operation of the ‘teeth and to guard
against easy breakage of these fragile spring
It is thought that the description taken incon
nection with the drawings will enable a clear
understanding of the inventionto be had. There
fore, a more lengthy description is thought un
While the preferred embodiment of the inven
tion has been shown and described, it is to be
understood that minor changes coming within 40
the field of invention claimed may be resorted ‘to
if desired.
What is claimed is :
1. In a structure assemblage of the class de
scribed, a frame unit including a pair of spaced 45
parallel bar members, a clip resting on the upper
edges of said members, a hanger stirrup ‘embrac-l
ing and hung from said clip and located between
said bar members, a set screw adjusting, and
clamping connection between the clip and hanger 50
stirrup, and adapter means in said hanger stir
rup serving- to slidably receive the shank portion
of a cooperating spring harrow tooth.
' ’
2. In a structure of the class described, a rela
tively stationaryframe unit of general rectangu 55
lar form including spaced parallel bar members,
a stirrup-like hanger vand clamping member dis
posed between said bar members, a clip resting on
the upper edges of thebar members, said-hanger
member being attached thereto through the in 60
strumentality of a set screw, an adapter block
saddled in said hanger member, said vadapter
block being grooved to slidably accommodate the
shank portion of a cooperating spring harrow
tooth, and co-acting elements between the lower
edges of the bar members and adjacent surface
of the adapter block ‘to permit said block to be
arranged either at right angles or oblique ‘angles
to properly position the harrow tooth as described.
3. In a structure of the class described, a frame
unit including spaced parallel bar members hav
ing keeper notches formed in their lower edge
portions, an adapter block having selectively
usable sets of teeth engageable with the keeper
notches, said adapter blockhavlng its underside
grooved to slidably receive the shank portion of a
complemental harrow tooth, a hanger element
embracing the adapter block and located between
the bar members of said frame unit, and means
for clamping the hanger member ?rmly on said
frame unit in the manner and for the purposes
stantially oblique to said longitudinal dimension,
and means for clamping the adapter block ?rmly
in the notches, said means being cooperable with
the bar members of the frame unit.
5. As a new article of manufacture, a com
ponent part of an assemblage of the class de
scribed, comprising a frame unit including spaced
4. In a structure of the class described, a rec-r parallel bar members having selectively usable
tangular relatively stationary frame unit includ
keeper notches, an adapter unit having selective
10 ing spaced parallel bar members having diagonal
ly usable keeper lugs engageable with said
keeper notches formed in their lower edges, an notches to allow the unit to be connected with
adapter block, said adapter block being provided the frame in a position to dispose it at right
with spaced sets of distinguishable lugs and said angles or obliquely to the longitudinal dimension
sets of lugs being selectively engageable with said of said frame, said adapter unit being grooved to
15 keeper notches to permit the block to be dis
accommodate the shank 'of a harrow tooth.
posed either at right angles to the longitudinal
dimension of the frame unit or in a position sub
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