Improvements in or connected with Horseshoes.
Year: 1892

page_text: Date of Application, 25th Mar., 1892
Complete Specification Left, 23rd Dec., 1892-Accepted, 28th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Horseshoes.
1, CHRISTIAN HARTMANN, of 8 Nicolaistrasse, Hanover, Prussia, Veterinary
Surgeon to His Royal Highness Prince Albrecht of Prussia, do hereby declare
the nature of this invention to be as follows :----
This invention refers to ledges, projections, or calks for horse-shoes, which may
be readily inserted or removed, and consist of flat spring pieces of metal, slightly
curved and provided with ribs on the concave side thereof. These spring pieces
are let into perpendicular slots formed in the treading surface of the horse-shoe, to
which my invention is to be applied, and the ledges or projections extend outwards
a proper distance from the said slots. The fixing of the ledges or projections in
the slots, which do not go quite through the shoe, is entirely effected by the spring
power of the ledge, inasmuch as the spring pieces forming the same are laid
perfectly flat in the slots of the horseshoe, and thereby are in tension, in consequence
of which the ribs on the side previously concave at the end of the spring are firmly
pressed against the side walls of the slot, and the middle part of the spring, the
crown, is firmly pressed against the other side wall of the slot.
In order to expand or straighten the spring piece to allow of its insertion in the
slot, I cut the two end ribs on the spring piece obliquely or bevelled at the base,
whilst the middle rib or ribs are only so far bevelled as to ensure a firm and easy
insertion into the slot; upon the forcing of the spring piece into the slot the side
ribs then act as wedges upon the flat spring and expand it gradually as it enters
the slot.
By preference the ribs extend to the treading edges of the spring pieces, and are
somewhat bevelled or sloped, so that the upper edges of the spring pieces entirely
form the tread, ledge, or surface.
The form or description of horse shoe which is to be provided with the ledges
according to my invention may be varied at pleasure. I may form the shoe with
the bearing parts at the back of the shoe connected by a sectionally T formed rib,
and the surface upon which the hoof rests enlarged by cheeks which grip in between
the angles of the iron. In the space underneath these cheeks a padding of india-
rubber, felt, or other similar material may be placed in the horse-shoe, for which
purpose the inner sides enclosing the padding are partially divided by a groove,
and the vertical rib thus left is divided at intervals, so that by bending the rib
inwards the padding may be firmly secured.
The removal of the ledges or projecting spring pieces from the shoe is effected
by inserting a fork-pointed lever for which holes are provided.
Dated this 25th day of March 1892.
BREWER & SON,
Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Horseshoes.
I, CHRISTIAN HARTMANN, of 8 Nicolaistrasse, Hanover, Prussia, Veterinary
Surgeon to His Royal Highness Prince Albrecht of Prussia, 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 refers to ledges projections or calks for horse-shoes which may be
readily inserted or removed and consist of flat spring pieces of metal slightly

page_text: curved and having in the centre underneath projecting pins, and ribs at the edges
on the concave side, which are also elongated underneath so that they are of the
same length with the middle pins. Pins and ribs, so far as they project beyond
the flat spring underneath, fit into corresponding perpendicular holes in the horse
shoe, which holes however are arranged in the direction of a straight line near to
each other, so that the flat spring upon the entrance of the pins and both end ribs
into their respective holes is forcibly drawn flat. In consequence of the tension of
the spring however the end ribs of the same are pressed close against the walls of
the holes to which they belong and thereby the fastening of the spring calk is
effected.
In order to produce an automatic expansion or straightening of the spring, I cut
the ribs at the two ends of the spring upon a slant or bevel at the base, whilst the
middle pin is advantageously made somewhat conical in form. Upon the insertion
of the spring in the shoe, the side ribs act as a wedge upon the flat spring and
gradually force it straight.
The top side of the spring is formed with a sharp edge.
My invention will be fully understood by reference to the accompanying
drawings.
Fig. 1 shews the treading surface of a horse shoe constructed according to my
invention;
Fig. 2 a perpendicular section through the horseshoe on the line x-x of
Fig. 1;
Fig. 3 a perpendicular section through the bearing portion of a horseshoe on the
yy of Fig. 1.
line
Fig. 4 is a side view of the calk;
Fig. 5 a vertical section through the same.
Fig. 6 shews the form of the calk before its complete insertion in the holes of
the shoe.
i
The new calk is to form a substitute for the heels in the bearing parts a a¹ and
for the tip in the toe-piece 9; it consists of a slightly curved flat spring, which in
the middle is provided with a pin projecting underneath and upon the concave
side at both ends with perpendicular ribs i. The two ribs i, which underneath are
elongated to the length of the pin ", are sloped at their bottom ends. The pro-
longations of the ribs and of the pin fit into the holes kk' respectively.
slanting bottom ends of the ribs facilitate the introduction of the same into the
holes k.
The
Upon the further pushing in of the ribs i and of the pin i¹ the slants in the ribs i
act as a wedge, and thereby gradually stretch or bend the spring h flat, whereupon,
in consequence of the tension produced in the spring, the ribs i are pressed firmly
against the walls of their holes k. The ribs i and pin enter such a depth into
their holes and k¹ until the flat spring h strikes with its bottom edge upon the
bottom treading surface of the sboe.
The removal of the calks or projecting ledges from the shoe is effected by
means of a fork with wedge shaped tines pushed or driven from the side to under-
neath the bottom edge of the flat spring h.
Figs. 7 and 8 shew this fork in side view and plan.
In order to be able to push the tine of this fork under the spring calk h,
slots n are provided in the shoe between the holes into which the tines are
inserted. If the fork is then driven by the blows of a hammer the spring calk
will be pushed out by the wedge action of the tines l.
The calk described can be used as well with closed as with open horse shoes.
The borse shoe which is to be provided with the calk in question may be of any
desired form. In the form of horse shoe represented, the treading parts a a' are
connected by a sectionally T formed rib and the surface upon which the hoof
rests is increased by the cheeks c, which occupy the space between the two shanks
of the shoe and leave the sole and frog of the hoof free.
In the space underneath these cheeks an elastic padding of indiarubber, felt, or

page_text: other similar material may be inserted, for which purpose the arms of the horse
shoe upon the sides surrounding the padding towards the cheeks c are partially
divided by a groove d, and the vertical rib thus left is divided at intervals by
incisions, so that by bending the parts of the rib e inwards the padding can be
firmly fastened in the shoe. The cheeks c ensure the uniformity of the treading
surface.
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. A changeable calk or projecting ledge for horse shoes as a substitute for heels
and tips, consisting of a slightly curved flat spring h, with a middle pin i' and with
ribs upon the concave side, which with the pins and the ribs i, is inserted into
holes perpendicular to the treading surface of the shoe and thereby held fast in the
same, so that the spring is compelled by the action of the slanting ribs i to become
flat, and by which means the ribs i are made to lie close against the walls of their
hcles as set forth.
2. In connection with the calks claimed in Claim 1, the horizontal cheeks c
projecting inside from the horse shoe, for the reception of a padding which is
protected from displacement by the flaps or parts of a rib cut perpendicularly from
the arms of the horse shoe, as set forth.
3. The general arrangement construction and combination of parts composing my
aforesaid improvements in horse-shoes all substantially as set forth.
Dated this 23rd day of December 1892.
CHRISTIAN HARTMANN.
Brewer & Son,
Agents.