Improvements in Shares for Ploughs and Similar Implements.
Year: 1897

page_text: Date of Application, 2nd Nov., 1897-Accepted, 29th Jan.,
1898
COMPLETE SPECIFICATION.
Improvements in Shares for Ploughs and Similar Implements.
I, RICHARD ALLIOTT SMITHURST, of Spittlegate Iron Works, Grantham, in the
County of Lincoln, Secretary. to Richard Hornsby and Sons Limited, do hereby
declare the nature of this invention (a communication to me by James Martin, of
Clarence Street, Sydney, in the Colony of New South Wales, Merchant,) 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 shares for ploughs and similar implements and to that class.
of share which is formed from a single plate or piece of steel.
Hitherto in manufacturing such shares, it has been usual when forming the socket
to weld the edge of the turned under portion of the plate which forms the socket to
the under surface of the blade; this inode of manufacture, however, possesses the
disadvantage that the high heating necessary for effecting the welding has the effect
of causing the deterioration of the metal.
The object of my invention is to overcome this objection and at the same time to
produce a good and sound socket without welding, and to this end I secure the free
edge of the plate which forms the socket by making upon it tongues adapted to be
inserted into slots designed to receive them.
To enable my invention to be fully understood I will describe the same by reference
to the accompanying drawings, in which :-
Figure 1 is a plan view of a share constructed according to my invention; and,
Figure 2 is an end view- of the same:
Figure 3 is a section on the line 3-3 Figure 1, and
Figure 4 is a plan view of the blank from which the share is formed:
Figure 5 is a view similar to Figure 3 shewing a slight modification.
In carrying out my invention I cut out a blank of steel plate (preferably of high
grade) to the shape shewn in Figure 4, when I desire to make a share of the shape
shewn in Figure 1, the said blank having the blade portion b, the point portion c,
the side portion d and the under portion e. The under portion e has formed upon
it tongues f,f designed to be introduced into the slots g, g which are cut on the
junction line between the underside of the blade and the socket portion of the share
when the latter is bent. The slots g, g are preferably formed by making three cuts
on the lines h, h, h and then pressing down the portions i, i of the plate to constitute
bevel seatings for the tongues f, f.
The blank having been prepared in the manner herein before described, the side
and bottom portions d and e of the socket are bent or folded on the lines j and, upon
a suitable block or former, the tongues f, f being inserted into the slots g, y provided
for them.
After the tongues have been inserted into the said slots, their ends are turned
outwards or away from the landside of the share as shewn in Figures 2 and 3 to lie
upon the bevelled portions i of the said slots.
With this arrangement the ends of the tongues f, f project slightly above the

page_text: surface of the share as clearly shewn in Figures 2 and 3. If this is considered
objectionable, the turned down portions i, may be stamped down so as to form
recesses into which the tongues f, f can be subsequently bent, as clearly shewn in
Figure 5.
The metal socket, formed as herein before described, is more durable and stronger
than the socket of single plate shares as heretofore manufactured, and when the
blade of the share on the wing side is worn, the strength of the socket will remain
unimpaired as the bursting tendency to which the socket is subjected when in use,
will be resisted by the full strength of the metal socket below the foot upon which
the share is fitted.
An important feature of my invention is that the socket made as hereinbefore
described does not require the angles to be upset or fullered to maintain the requisite
strength to resist the bursting tendency.
It is to be understood that the shape of the blank will vary according to the form
of share to be made and also according to the shape of the foot upon which the share
is to be fitted.
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. In a share formed from a single plate or piece of metal securing the folded
socket portion of the share by tongues passed through slots, substantially as
described.
2. In a share formed from a single plate or piece of metal, the formation of slots
such as g, g to receive tongues such as f, f substantially as, and for the purpose,
described.
3. In a single plate share in which the portion of the plate which forms the socket
is secured by tongues entering slots, pressing down the seating upon which the said
tongues rest, substantially as described by reference to Figure 5 of the drawings.
4. The manufacture and use of plough shares, constructed substantially as
herein before described and illustrated in the accompanying drawings.
Dated this 2nd day of November 1897.
G. F. REDFERN & Co.
4, South Street, Finsbury, London, Agents for the Applicant.