Cultivator Teeth, and the like.
Year: 1886

page_text: Cultivator Teeth, and the like.
I ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex,
Engineer do hereby declare the nature of this invention (a communication from
Thomas Henry Noxon of the Town of Ingersoll in the County of Oxford in
the Province of Ontario, Canada, Manufacturer of Agricultural implements) and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The object of the invention is to design a simple locking device for drill hoes
and cultivator teeth in which the full effect of a coiled wire spring shall be
attained in the simplest manner possible; and it consists first of a double coiled
wire spring wound round two cylinders secured in proximity to each other
between and near the end of the drag-bar, one end of the double coiled spring
being arranged to fit over the lug attached to the drill-hoe or cultivator tooth
while the other end of the spring butts against a lug formed on the locking dog;
secondly in a single coiled wire spring wound round a cylinder and so connected
to the hoe or cultivator tooth that the draft of the latter shall be directed simul-
taneously against both ends of the spring; and thirdly in journalling at the end
of the drag-bar a socket-stud onto which a hook formed on the hoe or cultivator
tooth fits, one end of the coiled spring being connected to the socket-stud, while
the other end of the spring is attached to the locking stud which is connected to
the hoe substantially as hereinafter explained.
Figure 1 is a perspective view partially in section of the single spring locking
device for drill hoes and cultivator teeth.
Figure 2 is a perspective detail of the locking stud and disc used in the single
spring locking device,
Figure 3 is a perspective detail of the socket stud.

page_text: Figure 4 is an alternative form showing the coiled spring wound round a
cylinder formed on the socket stud instead of a cylinder formed on the locking
stud as shown in Figure 1.
Figure 5 is a view showing means for restraining the tension of the spring so
that the hoe or cultivator tooth may be easily removed.
Figure 6 is a perspective view partially in section showing the double spring
locking device.
Figure 7 is an enlarged detail of the locking dog and one of the cylinders.
In Figure 6, A represents the drag bar made substantially in the usual manner
and having two cylinders B secured between the plates forming the drag bar at
or near its end.
C is a double coiled wire spring wound round the two cylinders B as indicated
in Figure 6 and having its ends a and b bent out from the coil as indicated.
The end a fits over a lug D formed on or connected to the drill hoe or cultivator
teeth E. The other end 6 fits against the lug d which projects inwardly from the
side of the locking dog F. This dog F is connected to the top of the drill hoe or
cultivator tooth E by the braces G.
Flanges e formed on the dog F lap over the edges of the braces G as indicated,
so that the tension of the spring shall hold the flanges e of the locking dog F
securely against the edges of the braces G and thereby maintain the double joint
necessary for the working of the hoe or cultivator tooth E. When the hoe or
cultivator tooth E comes in contact with an obstruction the lug D will press
upwardly against the end a of the spring C and simultaneously the lug & pushes
against the end 6 of the spring C causing the coil of the spring C to tighten round
its cylinder from both ends until the hoe has assumed about the position indicated
in dotted lines by which time the obstruction will be passed, and the tension of
the spring C will bring the hoe or cultivator tooth E instantaneously back to its
initial position.
By providing a double-coiled spring such as is described not only simplicity is
secured in the arrangement of the parts necessary to apply it to the hoe, but there
is also a powerful spring for bringing the hoe back into its initial position after
passing the obstruction.
In Figure 1 which illustrates the single-coil spring A represents the coiled spring
which is wound round a cylinder B journalled in the drag bar C, and attached to
or forming part of the locking-stud D.
E is a disc journalled on the cylinder B and provided with two projections a
and b.
One end of the spring A fits against a projection d formed on the locking
stud D, while the other end of the spring A fits over the projection a formed
on the disc E. The other projection 6 formed on the disc E fits below a pro-
jection e formed on the socket stud F, which is journalled on the end of the
drag bar C.
A hook G is formed on the hoe or cultivator tooth H which is formed so as to
clasp the recessed portion f of the stud F when the body of the hoe or cultivator
tooth H is fitted into the socket g formed in the stud F as represented.
I is a brace one end of which is pivoted on the stud D, while its other end is
provided with a pin or bolt h to fit into one of the notches i formed on the hoe
or cultivator tooth H.
When the parts mentioned are arranged as just described the draft of the hoe or
cultivator tooth H presses the projection e down against the projection b, causing
the projection b to press upwardly against the end of the spring A resting on it.
Simultaneously with this action the brace I pushes the locking stud D over in the
direction indicated by dotted lines in Figure 1 causing the projection d formed on
the locking stud to press downwardly on the end of the spring A against which it
In this manner the coiled spring A. is acted upon simultaneously from both
ends thereby deriving full benefit from the spring. The same effect will be
rests.

page_text: produced by coiling the spring A round a cylinder J formed on the socket stud F
when made as shown in Figure 4 and placing the projection d on the socket stud F
instead of on the locking stud D. The projection e will also be reversed being
placed on the cylinder B instead of on the socket stud. The disc E will also have
to be reversed being journalled on the cylinder J instead of on the cylinder B.
This slight change in the parts mentioned will produce exactly the same effect as
though the spring A was placed on the cylinder B as shown in Figure 1.
From this description it will be seen that the tension of the spring A holds the
hoe or cultivator tooth H rigidly in position in its socket stud F, and that it
cannot be removed therefrom until the strain from the tension of the spring A is
removed from it.
In order to restrain the tension of the spring A and thus enable the removal of
the hoe or cultivator tooth H, a tool K is provided, one end of which has a hole j
to fit over the pin k formed on the socket stud F. The other end of the tool K. is
provided with flanges m to lap over the drag bar C so that when the stud D is
pressed down between the bars forming the drag bar the flanges m shall extend
over and grasp the stud D, the size of the tool K being made exact so that when
the stud D is pressed down between the plates forming the drag bar and the
flanges m fit over it, the pink will come immediately in front of the holes i made
in the tool K which is fitted over it, thereby holding in complete subjection the
tension of the spring A and permitting the ready unhooking of the hoe or culti-
vator tooth H both from the stud F and the brace I.
So far as the working of the spring A for bringing the hoe or cultivator tooth
back into its initial position after passing an obstruction is concerned, the socket
stud Fmight form part of or be permanently attached to the hoe or cultivator
tooth H, so that while it is believed the best effects will be produced when the
device is constructed as described I do not wish to limit myself to the exact
arrangement so far as the application of the single coiled spring is concerned.
Having now particularly described and ascertained the nature of the said
invention as communicated to me by my foreign correspondent I declare that what
I claim is
1. A double coiled wire spring connected to the drag bar by means of two
cylinders round which the spring is coiled in combination with means for con-
necting the spring to the hoe so that its draft shall be directed simultaneously
against both ends of the spring.
2. A double coiled wire spring wound round a cylinder attached to the drag bar,
and having one of its outwardly turned ends fitting over a lug attached to the hoe
or cultivator tooth in combination with a dog provided with lugs fitting against the
outwardly projecting end on the spring, and connected to the hoe or cultivator
tooth by braces substantially as and for the purpose specified.
3. A double coiled wire spring wound round cylinders attached to the drag-bar
and having one of its outwardly turned ends fitting over a lug attached to the hoe
or cultivator tooth in combination with a dog provided with lugs fitting against
the outwardly projecting end on the spring and flanges for lapping over the edges
of the braces used to connect the dog to the hoe or cultivator tooth substantially
as and for the purpose specified.
4. A coiled wire spring wound round a cylinder journalled in the drag bar and
having one of its ends arranged to direct pressure against the locking stud, while
the other end directs pressure against a projection formed upon or attached to the
hoe or cultivator tooth, so that the draft of the latter shall be directed simulta-
neously against both ends of the spring.
5. A coiled wire spring wound round a cylinder and having one of its ends
attached to a projection in combination with a disc journalled on the cylinder, and
provided with a projection to connect with the end of the spring, and a projection
to connect with the projection on the socket stud substantially as and for the
purpose specified.

page_text: 6. A spring coiled round a cylinder attached to a socket stud which is journalled
on the drag bar as specified, a projection formed upon or attached to the stud in
combination with a disc journalled on the cylinder J and provided with projections
for connecting it to the spring and locking stud substantially as and for the purpose
specified.
7. A socket stud journalled on the end of the drag bar and having a socket formed
in it to receive the hoe or cultivator tooth having a hook formed on it to fit round
the said stud as specified in combination with a coiled wire spring one end of which
is connected to the socket stud while the other end is connected to the locking stud
which latter is connected by the brace to the hoe or cultivator tooth.
Date : 1012
ham 1002