Improvements relating to Horse-shoes and in Tools for use therewith.
Year: 1893

page_text: Date of Application, 4th Nov., 1893-Accepted, 9th Dec., 1893
COMPLETE SPECIFICATION.
Improvements relating to Horse-shoes and in Tools for use
therewith.
A communication by CONRAD ANKER, of 1, Stenersgaden, Christiania, in the
Kingdom of Norway, Merchant.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors 6 Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster and 323 High Holborn in the
County of Middlesex, Civil 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 relates to horseshoes and calkins for the same and also to means
for extracting such calkins from the horseshoes when worn out, and will be
explained with reference to the annexed drawings in which:
Figure 1 shows a side view of one of the calkins according to this invention.
Figure 2 shows the same from the front and in its seat in the horseshoe. The
dotted lines showing the tool for extracting the calkin in cross section.
Figure 3 illustrates the tool for extracting the calkins in position on the horse-
shoe.
According to this invention, one cylindrical hole for each calkin is provided in
the horseshoe, the calkin itself having a cylindrical shank a, the diameter of which
is a little greater than the diameter of the hole, so that when the calkin has been
driven into its hole it will be seated absolutely unmovable, as if it were welded to
the horseshoe and can not be extracted by any ordinary means. The head or point
of the calkin is preferably shaped as shown in the drawing, whereby the sides 6 are
diverging from the cylindrical shank of the calkin to the edge or point c. This
diverging form of the calkin-head is necessary because these calkins can only be
extracted in a peculiar way by means of the tool shown in Figure 3. This tool bas
the shape of a fork, the claws d of which have a cross section as shown in Figure 2,
corresponding with the shape of the calkins, and tapering somewhat towards the
handle e.
When the fork has been placed on a calkin as shown in Figure 3 it has
imparted to it a sharp blow on the handle, thereby causing the calkin to be with-
drawn from its hole. Of course the shape of the calkin-head may be varied in
different ways; it may be cross-shaped for instance, or square, but in all cases a
longitudinal section of the head on one or other line must show tapering sides
diverging from the shank of the calkin towards the point of the same. It is
preferable however to give the calkins the shape shown in the drawing because they
may be made in a very simple way out of a short piece of round steel, the point or
edge being formed by a simple forging or pressing operation. As will be easily
understood the tapering sides of the calkins need not continue all the way out to
the edge; it serves the purpose when the sides are tapering to about midway, as
the extraction of the calkins will not generally be performed till that much of them
is worn off.
These calkins are very cheap to manufacture and being easy to insert, and easy
to extract when worn out, they are a great improvement upon the calkins hitherto
used or proposed, so much the more as they cannot be rocked in their seat and do
not in any way hurt the foot of the horse.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me by my
foreign correspondent, I declare that what I claim is :-
1. Improved removable calkins for horseshoes, having a cylindrical shank and a

page_text: head tapering outwardly from the shank, substantially as described and shown on
the accompanying drawings.
.
2. The combination with a horseshoe provided with cylindrical holes, of calkins
having a cylindrical shank the diameter of which is a little greater than the
diameter of the holes in the horseshoe, substantially as and for the purposes
specified.
3. A tool for extracting calkins having forked claws substantially as described
and shown on the accompanying drawings.
Dated this 3rd day of November 1893.
WM. P. THOMPSON & Co.,
Agents for the Applicant.