An Improvement in or connected with Spring Teeth of Cultivators.
Year: 1893

page_text: Date of Application, 12th Oct., 1893
Complete Specification Left, 14th June, 1894-Accepted, 14th July, 1894
PROVISIONAL SPECIFICATION.
An Improvement in or connected with Spring Teeth of
Cultivators.
I, JOSEPH BAMFORD, of Market Street, Lichfield, Staffordshire, Engineer, do
hereby declare the nature of this invention to be as follows:-
:-
This invention consists of the herein described improvement in or connected with
the spring teeth of cultivators. These spring teeth as heretofore usually made each
consists of a bar of spring steel usually of flat section which at its upper end is
fixed to the frame of the cultivator the bar being carried backwardly and bent
round and downwardly to the lower working end which is pointed and stirs up the
soil to a certain depth as the cultivator is drawn along. When the lower working
ends of the said spring teeth are worn away the whole of the spring tooth has to be
renewed. The object of this invention is to so construct the said spring teeth for
cultivators that when the lower working parts or points are worn these parts can be
renewed at a small expense without having to renew the whole of the tooth.
According to this invention instead of making each of the spring teeth in one
piece as heretofore I make the lower working part or point (hereinafter called the
point) of each tooth separate from the upper or main portion thereof and I fix
the loose point and the upper part of the tooth together by any convenient means
such for instance as a bolt or bolts or rivets passing through both parts of the
tooth or by one or more loose metal collars or sockets which is or are threaded on
to the tooth so as to encircle the overlapping ends of the main portion of the tooth
and the loose point, a set screw or a cotter or other means being employed to keep
the collar in place.
As the lower part or point of any spring tooth wears away the said loose point
can be set down to make the tooth of the original length by first unscrewing the
set screw or otherwise freeing the point of the tooth from the main portion of the
same and when the said loose point is so worn as to be no longer serviceable it can
at a small cost readily be removed and replaced by a new loose point.
Dated this 11th day of October 1893.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
An Improvement in or connected with Spring Teeth of
Cultivators.
I, JOSEPH BAMFORD, of Market Street, Lichfield, Staffordshire, Engineer, do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention consists of the herein described improvement in or connected with
the spring teeth of all kinds of cultivators including such as are known as harrows,
horse hoes and weed exterminators. These spring teeth as heretofore usually
made each consists of a bar of spring steel usually of flat section which at its upper
end is fixed to the frame of the cultivator the bar being carried backwardly and
bent round and downwardly to the lower working end which is pointed and stirs up
[Price Ed.1

page_text: the soil to a certain depth as the cultivator is drawn along. When the lower
working ends of the said spring teeth are worn away the whole of the spring tooth
has to be renewed. The object of this invention is to so construct the said spring
teeth for cultivators that when the lower working parts or points are worn these
parts can be renewed at a small expense without having to renew the whole of
the tooth.
According to this invention instead of making each of the spring teeth in one
piece as heretofore I make the lower working part or point (hereinafter called the
point) of each tooth separate from the upper or main portion thereof and I fix the
loose point and the upper part of the tooth together by any convenient means such
for instance as a bolt or bolts or rivets passing through both parts of the tooth or
by one or more loose metal collars or sockets which is or are threaded on to the
tooth so as to encircle the overlapping ends of the main portion of the tooth and
the loose point, a set screw or a cotter or other means being employed to keep the
collar in place.
As the lower part or point of any spring tooth wears away the said loose point
can be set down to make the tooth of the original length by first unscrewing the
set screw or otherwise freeing the point of the tooth from the main portion of the
same and when the said loose point is so worn as to be no longer serviceable it can
at a small cost readily be removed and replaced by a new loose point.
In order that my invention may be well understood I will now proceed to
describe the same with reference to the accompanying drawing on which
Fig. 1 is a side elevation and Fig. 2 is a front elevation of a cultivator spring
tooth made with a loose point in accordance with this invention; Fig. 3 is a
sectional plan of the same on line X X of Fig. 1;
Fig. 4 is a side view and Fig. 5 is a plan of the lower part of the spring tooth of
a cultivator with another arrangement of loose point in accordance with this
invention;
Fig. 6 is a perspective view of the lower part of the spring tooth of a cultivator
with a loose point fixed thereto in accordance with a further modification of this
invention and
Fig. 7 is a separate view of the loose point shewn by Fig. 6 before being fixed on
to the spring tooth.
The same letters of reference indicate the same or corresponding parts in all the
figures.
A is one of the ordinary spring teeth of a cultivator which teeth are of various
forms and to all or any of which my invention can be applied. B is the loose point
which according to this invention I provide and fix to the spring tooth A. This
loose point B may be of the same section steel as the other part of the tooth or of
any other suitable section and forms. This loose point B may either be pointed at
both ends 12 (see Figs. 1, 2 and 3) or pointed only at one end 6' (see Figs. 4, 5
and 6). The advantage of having the loose point B pointed at both ends is that
when a pointed end say ' has been worn away the loose part B can be turned round
to bring the other pointed end 2 into use.
My drawing shews various methods which I may adopt for removably securing
the loose point B to the cultivator spring teeth A as above described, but it is to be
understood that these are intended as examples only and that my invention is not
limited to them. For instance as shewn by Figs. 1, 2 and 3 the loose point B may
be fixed to the spring tooth A by the bolt D (which passes through the loose
point B and tooth A) and by the loose point B being made with an indented pip c
which engages in a hole a¹ in the spring tooth A thus preventing the loose point B
turning. When it is desired to use the other end 62 of the loose point B the nut
has to be removed from the bolt D and the loose point B turned round so that the
indented pip c will now engage in another hole a² placed farther up the tooth A
and in a line with the bolt D and then when the bolt D is made secure again the
point B will be secured in this position with the pointed end 62 ready for work. In
the arrangement shewn by Figs. 4 and 5 the loose point B is secured to the tooth A

page_text: by means of two loose metal collars or sockets marked respectively E¹ E' which
are shaped to fit and embrace the point B and the tooth A and to fit thereon so as
to encircle the overlapping ends of the main portion of the tooth A and the loose
point B, each of these collars or sockets being secured in place as by the set
Srew F. By first unscrewing these set screws F the loose point B can be adjusted
higher up the spring teeth A or lower down the same as may be required. In the
arrangement of my invention shewn by Figs. 6 and 7 the loose point B is made
with two lateral projections marked bb at its upper end which are, as shewn in
Fig. 6, bent round the tooth A. so as to clip the same and thus secure the point B to
the tooth A the point B being prevented from turning or moving up or down by
the pip c which engages in a corresponding hole in the tooth.
It is to be understood that my said invention is not limited to the particular
constructions of loose points and methods of fixing the same to the spring teeth
herein described and shewn upon my drawings as it will be evident that without
departing from the nature of my invention the removable or loose points for the
spring teeth may be constructed and fixed thereto in other ways than those herein
described and shewn upon my drawing.
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 :-
:-
In combination with the spring teeth of cultivators the employment of points
made separate from the said spring teeth and removably secured thereto so as to be
readily adjusted or removed when worn and replaced by fresh points, substantially
as hereinbefore set forth.
Dated this 13th day of June 1894.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.