Improvements in and connected with Plough Coulters,
Year: 1897

page_text: Date of Application, 19th Oct., 1897
Complete Specification Left, 18th July, 1898-Accepted, 3rd Sept., 1898
PROVISIONAL SPECIFICATION.
Improvements in and connected with Plough Coulters,
I, JOHN REEVE LAVELL, of 21A, Old Change, in the City of London, Solicitor,
do hereby declare the nature of this invention (a communication to me by William
Humphrey Perrin, of Smith's Falls, in the County of Lanark, in the Province of
Ontario, Dominion of Canada, Gentleman) to be as follows:-
My invention relates to plough coulters and to means for holding them in
position whilst at the same time allowing them to tilt during the backward move-
ment of a plough.
According to my invention I make use of a clip comprising a plate adapted
to be fixed to the beam by a stirrup. This plate is provided on its inner face with
studs at the diagonally opposite corners thereof which studs act as distance pieces,
abutting against the beam of the plough. At the upper end on the inner face
the said plate increases in thickness forming a wedge shaped portion and the
coulter is also more or less wedge shaped so that during work it will jamb
between the inclined face of the said plate and the beam.
To permit of the coulter tilting I fix to it a rack provided at one end with a
clip and at the other end with a series of teeth which latter are adapted to engage
The rack is
on one of the studs of the plate and on one bar of the stirrup.
made thin at the lower end and gradually increases in thickness towards the
upper end of the toothed portion, thus enabling the coulter to be set at any angle.
The depth of the coulter is regulated by the position in which it is secured on the
clip the teeth preventing any variation in this respect.
With this arrangement the coulter whilst being free to pivot under a pressure
from behind is rigidly held whilst the plough is moving forward.
To the front of the coulter I sometimes fix a mould board, a lug being provided
by means of which it may be bolted securely to the left side of the coulter. This
mould board is of peculiar construction, being close to and in front of the coulter
at the point. The upper corner of the said mould board is bent forward from the
coulter and the point is rearwardly inclined. The upper face is concavo-convex
the curves converging to a point.
By the peculiar shape of this attachment the weeds and the like that usually
clog à plough coulter are thrown clear.
1001
1
1007
Improvements in and connected with Plough Coulters.
I, JOHN REEVE LAVELL, of 21A, Old Change, in the City of London, Solicitor,
do hereby declare the nature of this invention (a communication to me by William
Humphrey Perrin, of Smith's Falls, in the County of Lanark, in the Province of
DQ71

page_text: Ontario, Dominion of Canada, Gentleman) and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement-
My invention relates to plough coulters and to means for holding them in
position whilst at the same time allowing them to tilt during the backward move-
ment of a plough.
According to my invention I make use of a clip comprising a plate adapted
to be fixed to the beam by a stirrup. This plate is provided on its inner face with
studs at the diagonally opposite corners thereof which studs act as distance pieces,
abutting against the beam of the plough. At the upper end on the inner face
the said plate increases in thickness forming a wedge shaped portion so that
during work the coulter will jam between the inclined face of the said plate and
the beam. The coulter may also be more or less wedge shaped.
To permit of the coulter tilting I fix to it a rack provided at one end with a
clip and at the other end with a series of teeth which latter are adapted to engage
on one of the bars of the stirrup which secures the plate in position. The rack is
made thin at the lower end and gradually increases in thickness towards the
upper end of the toothed portion, thus enabling the coulter to be set at any angle.
The depth of the coulter is regulated by the position in which it is secured on the
clip the teeth preventing any variation in this respect.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which:-
Figure 1 is a side view of a coulter constructed according to my invention and
fixed to a plough beam by means of my improved clip; and,
Figure 2 is a side view of the coulter detached:
Figure 3 is a front view of the same; and,
Figure 4 is a section on the line 4-4 of Figure 2 but drawn to a larger scale:
Figure 5 is a side view drawn to a larger scale than Figure 1 of a part of the
clip; and,
Figure 6 is a rear view drawn to the same scale as Figure 5 shewing the clip
in position upon the plough beam.
a
a is the coulter and 6 is the clip for holding the said coulter to the beam c.
The coulter itself is of ordinary construction and is provided with
rack fixed to the back of the coulter by means of any suitable
clip e. The rack is taper, that is to say, the bottom end of the line of notches
is nearer to the stem of the coulter than the top end for the purpose hereinafter
described. The clip b comprises a plate of having on its inner face the lugs or
distance pieces f¹, f the former of which, with the form of beam shewn, lying
beneath the upper flange of the beam, as shewn in Figure 6, whilst the other f
has in it a notch so that it embraces the lower flange of the said beam.
At its upper end the plate f has its inner surface inclined or bevelled as
shewn at g.
is the usual strap or stirrup which embraces the beam the ends of the said
stirrup being passed through holes in the plate f and being secured by nuts.
In applying the coulter to the beam it is placed with one of the notches between
the teeth of the rack d upon the lower bar of the stirrup h and then the clip is
screwed up tightly against the beam, the length of the distance pieces f¹, f2 being
such that the distance between the inner face of the plate f and the adjacent
face of the beam is slightly greater than the part of the stem of the coulter
adjacent thereto. When pressure is applied to the front of the coulter the stem
of the latter will become jammed between the inclined portion g of the said plate
and the side of the beam so that the coulter will be tightly held; immediately,
however, any back pressure is applied to the coulter the reverse action will take
place the coulter being free to turn upon the pivot formed by the lower bar of
the stirrup h.
The angle of the coulter can be varied to a certain extent according to the

page_text: notch with which the stirrup h engages, as the notches being placed at slightly
different distances from the stem of the coulter hereinbefore described act in the
same manner as the different parts of a wedge. It will be obvious that in adjusting
the angle of the coulter the rack d will have to be adjusted in position upon the
stem of the coulter by means of its clip e.
To the front of the coulter I sometimes fix the mould board or skim i by means
of a rod and a clip . This mould board or skim is so arranged that it turns
the stubble and weeds in front of the coulter on to the middle of the piece of the
land which will be turned over in the next bout instead of on to the land which
is just about to be turned.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. The combination with a plough coulter of a clip for fixing the said coulter
upon the plough beam, the said clip being formed with an inclined surface against
which the coulter will be jammed to tightly hold it when the plough is in work
and a rack fixed to the said coulter and adapted with one of the notches to engage
with one of the bars of the clip which forms a pivot in such a manner that upon
any backward movement of the plough the coulter will rock, substantially as
described.
2. The combination with a plough coulter constructed substantially as herein-
before described, of a skim constructed and applied to the said coulter, substan-
tially as set forth.
3. The manufacture and use of plough coulters (with or without skims) and
clips, substantially as herein before described and illustrated in the accompanying
drawing.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.