TOWD, Scarifiers, and other Analogous Agricultural Implements.
Year: 1885

page_text: TOWD,
Scarifiers, and other Analogous Agricultural Implements.
I, WILLIAM LLOYD Wise of N° 46 Lincoln's Inn Fields in the County of
Middlesex, Consulting Engineer and Patent Agent do hereby declare the nature
of said invention for "AN IMPROVED ADJUSTABLE TOOTH FOR EXTRACTORS,
HARROWS, SCARIFIERS, AND OTHER ANALOGOUS AGRICULTURAL IMPLEMENTS "
communication to me from abroad by Antoine Bajac of Liancourt (Oise) France,
Constructing Engineer, and Messrs Béjot and Co of 18 rue de Türenne; Paris,
France, Steel and File Merchants) to be as follows:-.
This invention relates to an arrangement of adjustable tooth suitable for weed
extractors, scarifiers harrows and other analogous agricultural implements.
Hitherto, the teeth of such implements have usually comprised two distinct parts,
namely the tooth proper and the rod serving to connect the tooth to the cross bar
or frame of the implement.
The tooth proper has been fixed upon the rod by means of bolts or been made
in one therewith, and its rapid wear has necessitated frequent renewals and has
interfered with the efficient operation of the implement, the mode of connection of
the rod, with the cross bar or frame not being such as to permit of varying the
position of the tooth relatively to the soil.
Now according to this invention the tooth is made very durable and.its position
upon the frane relatively to the soil can be easily regulated at will.
The tooth is not composed of two separate parts a tooth proper and a rod but is
made in a single piece to serve the purposes of the two above mentioned parts.
The accompanying sheet of drawings illustrates in different views by way of
example a tooth constructed according to this invention.
Fig. 1 is a side elevation of the tooth.
Fig. 2. shows its rear face.
Fig. 3 is a horizontal section in line 1-2 of Fig. 1 illustrating the mode of
mounting the tooth upon the cross bar of an implement.
The same letters of reference indicate corresponding parts in the different figures.
a is the tooth formed in one piece of steel curved according to the shape and radius
desired. This piece as seen in transverse section is hollow at that face which,
077

page_text: seen in side view, is convex, and the reverse face (i.e. that which as seen in side
view is concave) is provided with a longitudinal rib b. The rib increases the
resistance of the blade to flexion and torsion and has moreover the effect of
enabling, the tooth to operate notwithstanding its wear, its extremity still
preserving about the same profil when operating on the soil.
The two extremities of the tooth are suitably cut and sharpened and the tool
thus formed serving the double purpose of tooth and rod is mounted directly upon
the implement.
As will be readily understood, it will suffice to feed the tooth towards the soil as
wear occurs in order to be able to use it for a long time, without the removal that
has usually been required with teeth as heretofore ordinarily constructed.
The tooth may be mounted upon the implement by any suitable means preferring
however the arrangement illustrated in the drawing.
c is the cross bar upon which the tooth is mounted by means of two stirrup
irons d, the branch e of which is bent so as to support the rib and the back of the
tooth upon the whole of its periphery; fis a counter plate traversed by the screw
threaded portions of the stirrups, which are provided with nuts g. In order to
obviate flattening of the tooth by pressure of the stirrup its two edges are held on
each side of the counter plate by two projections / clearly shewn in Fig. 3.
This mode of mounting, the tooth enables its position to be readily varied so that
It likewise admits of
it may be kept in proximity to the soil as wear occurs.
varying the inclination of the tooth relatively to the soil by tightening one of the
stirrups & more than the other and interposing suitable wedges between the tooth
and the cross bar c.
The teeth may, by these means, be arranged at will at variable intervals upon
the frame of the implement according to the work it is desired to perform.
The two extremities of the tooth may likewise, if desired, be cut in two different
manners, so that it may only need reversing when changing the class of work to
be performed. The form may be modified without departure from the nature of
the invention.

page_text: An
Improved Adjustable Tooth for Extractors, Harrows,
Scarifiers, and other Analagous Agricultural Implements.
"
I, WILLIAM LLOYD WISE, of No 46 Lincoln's Inn Fields in the County of
Middlesex, Consulting Engineer and Patent Agent do hereby declare the naturė
of said invention for "AN IMPROVED ADJUSTABLE TOOTH FOR EXTRACTORS, HARROWS,
SCARIFIERS, AND OTHER ANALAGOUS AGRICULTURAL IMPLEMENTS (a communi-
cation to me from abroad by Antoine Bajac of Liancourt (Oise) France, Constructing
Engineer, and Messrs Béjot and C° of 18 rue de Turenne, Paris, France, Steel and
File Merchants) and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
This invention relates to an arrangement of adjustable tooth suitable for weed
extractors, scarifiers, harrows and other analagous agricultural implements.
Hitherto, the teeth of such implements have usually comprised two distinct parts,
namely the tooth proper and the rod serving to connect the tooth to the cross bar
or frame of the implement.
The tooth proper has been fixed upon the rod by means of bolts or been made in
one therewith, and its rapid wear has necessitated frequent renewals and has
interfered with the efficient operation of the implement, the mode of connection
of the rod, with the cross bar or frame not. being such as to permit of varying the
position of the tooth relatively to the soil.
Now according to this invention the tooth is made very durable and its position
upon the frame relatively to the soil can be easily regulated at will.
The tooth is not composed of two separate parts a tooth proper and a rod, but is
made in a single piece to serve the purposes of the two above mentioned parts.
The accompanying sheet of drawings illustrates in different views teeth constructed
according to this invention.
Fig. 1 is a side elevation of the tooth. Fig. 2 shows its rear face. Fig. 3 is a
horizontal section in line 1-2 of Fig. 1 illustrating the mode of mounting the
tooth upon the cross bar of an implement.
The same letters of reference indicate corresponding parts in the different figures.
a is the tooth formed in one piece of steel curved according to the shape and radius
desired. This piece as seen in transverse section is hollow at that face which, seen
in side view, is convex, and the reverse face (i.e. that which as seen in side view is
concave) is provided with a longitudinal rib b. The rib increases the resistance of
the blade to flexion and torsion and has moreover the effect of enabling the tooth
to operate notwithstanding its wear, its extremity still preserving about the same
profile when operating on the soil.
The two extremities of the tooth are suitably cut and sharpened and the tool
thus formed serving the double purpose of tooth and rod is mounted directly upon
the implement.

page_text: As will be readily understood, it will suffice to feed the tooth, towards the soil, as
wear occurs, in order to be able to use it for a long time, without the removal that
has usually been required with teeth as heretofore ordinarily constructed.
The tooth may be mounted upon the implement by any suitable means preferring
however the arrangement illustrated in the drawing.
c is the cross bar upon which the tooth is mounted by means of two stirrup
irons d, the branch e of which is bent so as to support the rib and the back of the
tooth upon the whole of its periphery; f is a counter plate traversed by the screw
threaded portions of the stirrup, which are provided with nuts g. In order to
obviate flattening of the tooth by pressure of the stirrup its two edges are held on
each side of the counter plate by two projections / clearly shown in Fig. 3.
This mode of mounting the tooth enables its position to be readily varied so that
it may be kept in proximity to the soil as wear occurs. It likewise admits of
varying the inclination of the tooth relatively to the soil by tightening one of the
stirrups & more than the other and interposing suitable wedges' between the tooth
and the cross bar c.
The teeth may, by these means, be arranged at will at variable intervals upon
the frame of the implement according to the work it is desired to perform.
The two extremities of the tooth may likewise, if desired, be cut in two different
manners, so that it may only need reversing when changing the class of work to be
performed.
A modified' method of mounting the tooth according to this invention is shown
in Figs. 4 to 8.
Fig. 4 shows a side elevation of the tooth of an extractor. Fig. 5 represents a
horizontal section through the line 1-2 in Fig. 4. Fig. 6 shows a vertical section
through 3-4 in Fig. 5. In these figures, a is the tooth and b is the cross-bar
upon which it is incunted. The attachment is effected in the middle by means of a
kind of stirrup c which encloses the piece b as already described with reference to
Figs. 1, 2 and 3, but the bolts and nuts are replaced by a key and gib. The key d
passes through the stirrup c while the gib e rests against the back of the tooth
and on its other side presses against the cross bar b.
It will be understood that this forms a most rigid combination and has a tendency
to tighten in work.. In fact, the force exerted on the tooth during the work in the
direction of the arrow X (Fig. 4) is transmitted to the stirrup which tends to draw
back and thus to facilitate the entrance of the key d. Experience proves that teeth
badly keyed at the commencement of work are tightened after these teeth have
met with resistance for a little while. A taper pin f moreover, prevents the key d
from quitting its place and shoulders answer the same purpose for the gib e.
As stated above, this system of tooth inay further be applied to extractors,
harrows, scarifiers and other analagous agricultural implements.
.
Figs. 7 and 8 shew the application of the invention in the case of a meadow
rake. In this case the tooth a is feather edged throughout its entire length. Fig. 7
shows the elevation of such a tooth, fixed according to the preceding system..
Fig. 8 shows a section along the line 5-6 in Fig. 7. In these figures, the letters
of reference signify the same as in Figs. 4, 5, 6. a is the blade; b the cross-bar;
c the stirrup; d the key; e the gib embracing the back of the blade; f the taper
pin and the shoulders of e.
9
The arrangement is the same only the shape of the
parts being varied. It is sometimes advantageous to provide the tooth with a
central rib on the side of the inner face, as shewn in Fig. 9 in cross section.
This rib has for its object to increase the strength of the tooth; besides, it
permits of the implement being made to travel in such a way that the tooth
operates in a contrary direction to the ordinary one and produces upon the soil a
reducing effect analagous to that which is obtained by the harrow or the roller or
the Croskill clod-breaker. The fixing of this improved tooth is effected as above
explained and is represented in elevation Fig. 10 and in horizontal section
Fig. 11. c is the cross-bar of the implement, d. the stirrup, e the key, a the tooth

page_text: and f the gib which has a shape corresponding to that of the internal face of the
tooth, so as to embrace the surface.
It may be remarked that the section of the tooth may be varied in shape and
dimensions without departure from the principle of the invention; for instance it
might be provided with several ribs b in place of ouly one.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated
to me by my foreign correspondents, I declare that what is claimed in extractors,
harrows, scarifiers, and other analagous agricultural implements, is
"
1. The use of a tooth consisting of one curved piece with or without longitudinal
ribs, the said piece being such as to fulfil the offices hitherto performed by the
tooth proper and by the rod on which it was supported substantially as described.
2. Fixing a tooth such as referred to in the previous claim by 'means of a
stirrup d and a counter plate f the whole so arranged as to permit of the adjust-
ment of the position of the tooth with relation to the soil, substantially as described
and shewn on the drawings.
3. Fixing a tooth such as that referred to in claim 1 by means of a key and gib
combined with a stirrup substantially as described with reference to Figs. 4 to 8
inclusive of the drawings.
4. The use of a tooth having on the inner face one or more ribs, substantially as
above described and for the purpose specified.